annotate Discovery/Src/vpm.c @ 247:3949781096d4 bm-1

feature: Relative GF to Saturation renames Rename relevant code from Relative GF to Saturation. Involving UI elements, variable names, translated texts (that still need to be done), etc. No functional changes. Notice that I chose super_saturation as name, to provide a better link to the hwOS repo. Further notice that the TXT variable name is not changed. This is intensional, as there is also a desaturation variable, so things might get confusing renaming the TXT variable name. Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
author Jan Mulder <jlmulder@xs4all.nl>
date Tue, 09 Apr 2019 16:30:21 +0200
parents e1d66bc78f9a
children 5e0bb91d4a12
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1 ///////////////////////////////////////////////////////////////////////////////
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2 /// -*- coding: UTF-8 -*-
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3 ///
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4 /// \file Discovery/Src/vpm.c
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5 /// \brief critical_volume comment by hw
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6 /// \author Heinrichs Weikamp, Erik C. Baker
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7 /// \date 19-April-2014
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8 ///
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9 /// \details
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10 ///
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11 /// $Id$
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12 ///////////////////////////////////////////////////////////////////////////////
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13 /// \par Copyright (c) 2014-2018 Heinrichs Weikamp gmbh
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14 ///
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15 /// This program is free software: you can redistribute it and/or modify
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16 /// it under the terms of the GNU General Public License as published by
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17 /// the Free Software Foundation, either version 3 of the License, or
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18 /// (at your option) any later version.
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19 ///
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20 /// This program is distributed in the hope that it will be useful,
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21 /// but WITHOUT ANY WARRANTY; without even the implied warranty of
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22 /// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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23 /// GNU General Public License for more details.
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24 ///
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25 /// You should have received a copy of the GNU General Public License
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26 /// along with this program. If not, see <http://www.gnu.org/licenses/>.
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27 //////////////////////////////////////////////////////////////////////////////
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28 /// \par Varying Permeability Model (VPM) Decompression Program in c (converted from FORTRAN)
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29 ///
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30 /// Author: Erik C. Baker
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31 ///
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32 /// "DISTRIBUTE FREELY - CREDIT THE AUTHORS"
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33 ///
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34 /// This program extends the 1986 VPM algorithm (Yount & Hoffman) to include
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35 /// mixed gas, repetitive, and altitude diving. Developments to the algorithm
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36 /// were made by David E. Yount, Eric B. Maiken, and Erik C. Baker over a
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37 /// period from 1999 to 2001. This work is dedicated in remembrance of
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38 /// Professor David E. Yount who passed away on April 27, 2000.
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39 ///
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40 /// Notes:
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41 /// 1. This program uses the sixteen (16) half-time compartments of the
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42 /// Buhlmann ZH-L16 model. The optional Compartment 1b is used here with
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43 /// half-times of 1.88 minutes for helium and 5.0 minutes for nitrogen.
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44 ///
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45 /// 2. This program uses various DEC, IBM, and Microsoft extensions which
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46 /// may not be supported by all FORTRAN compilers. Comments are made with
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47 /// a capital "C" in the first column or an exclamation point "!" placed
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48 /// in a line after code. An asterisk "*" in column 6 is a continuation
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49 /// of the previous line. All code, except for line numbers, starts in
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50 /// column 7.
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51 ///
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52 /// 3. Comments and suggestions for improvements are welcome. Please
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53 /// respond by e-mail to: EBaker@se.aeieng.com
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54 ///
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55 /// Acknowledgment: Thanks to Kurt Spaugh for recommendations on how to clean
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56 /// up the code.
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57 /// ===============================================================================
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58 /// Converted to vpmdeco.c using f2c; R.McGinnis (CABER Swe) 5/01
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59 /// ===============================================================================
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60 ///
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61 /// ************************ Heirichs Weipkamp **************************************
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62 ///
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63 /// The original Yount & Baker code has been adjusted for real life calculation.
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64 ///
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65 /// 1) The original main function has been split in several functions
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66 ///
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67 /// 2) When the deco zone is reached (while ascending) the gradient factors are kept fix
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68 /// and critical volume algorithm is switched of. maxfirststopdepth is kept fix
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69 /// to make shure Boeyls Law algorithm works correctly
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70 ///
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71 /// 4) gas_loadings_ascent_descend heeds all gaschanges and CCR support has been added
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72 ///
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73
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74 #include <stdio.h>
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75 #include <stdlib.h>
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76 #include <string.h>
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77 #include <math.h>
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78 #include <time.h>
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79
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80 //#include "compiler.h"
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81 //#include "sdramc.h"
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82 #include "vpm.h"
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83 //#include "buehlmann.h"
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84
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85 #include "decom.h"
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86
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87 //#include "decompression.h"
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88 //#include "taskmanagement\tissue_calls.h"
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89 #define true 1
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90 #define false 0
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91
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92 #define GAS_N2 0
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93 #define GAS_HE 1
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94 /* temp vars to simplify UNFMTLISTs */
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95 float fO2, fHe, fN2;
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96 float dc, rc, ssc;
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97 short mc;
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98
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99 const _Bool buehlmannSafety = true;
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100 /* Common Block Declarations */
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101
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102 extern const float SURFACE_TENSION_GAMMA; //!Adj. Range: 0.015 to 0.065 N/m
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103 extern const float SKIN_COMPRESSION_GAMMAC; //!Adj. Range: 0.160 to 0.290 N/m
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104 extern const float UNITS_FACTOR;
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105 extern const float WATER_VAPOR_PRESSURE; // (Schreiner value) based on respiratory quotien
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106 extern const float CRIT_VOLUME_PARAMETER_LAMBDA; //!Adj. Range: 6500 to 8300 fsw-min
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107 extern const float GRADIENT_ONSET_OF_IMPERM_ATM; //!Adj. Range: 5.0 to 10.0 atm
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108 extern const float REGENERATION_TIME_CONSTANT; //!Adj. Range: 10080 to 51840 min
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109 extern const float PRESSURE_OTHER_GASES_MMHG; //!Constant value for PO2 up to 2 atm
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110 extern const float CONSTANT_PRESSURE_OTHER_GASES; // PRESSURE_OTHER_GASES_MMHG / 760. * UNITS_FACTOR;
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111
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112 extern const float HELIUM_TIME_CONSTANT[];
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113 extern const float NITROGEN_TIME_CONSTANT[];
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114
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115 float minimum_deco_stop_time;
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116 float run_time, run_time_first_stop;
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117 float segment_time;
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118 short mix_number;
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119 float barometric_pressure;
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120 _Bool altitude_dive_algorithm_off;
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121 _Bool units_equal_fsw, units_equal_msw;
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122
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123 /* by hw 11.06.2015 to allow */
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124 float gCNS_VPM;
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125
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126 float helium_pressure[16], nitrogen_pressure[16];
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127 //float helium_pressure_crush[16], nitrogen_pressure_crush[16];
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128 //float fraction_helium[MAX_GASMIXES + EXTRA_GASMIXES], fraction_nitrogen[MAX_GASMIXES + EXTRA_GASMIXES];
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129 //float initial_critical_radius_he[16], initial_critical_radius_n2[16];
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130 //float adjusted_critical_radius_he[16],
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131 //adjusted_critical_radius_n2[16];
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132 //float max_crushing_pressure_he[16],
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133 //max_crushing_pressure_n2[16];
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134 float surface_phase_volume_time[16];
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135 //float max_actual_gradient[16];
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136 //float amb_pressure_onset_of_imperm[16],
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137 //gas_tension_onset_of_imperm[16];
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138 //float initial_helium_pressure_global[16],
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139 //initial_nitrogen_pressure_global[16];
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140 float regenerated_radius_he[16],
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141 regenerated_radius_n2[16];
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142 //float adjusted_crushing_pressure_he[16],
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143 //adjusted_crushing_pressure_n2[16];
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144 float allowable_gradient_he[16],
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145 allowable_gradient_n2[16];
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146 //float initial_allowable_gradient_he[16],
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147 //initial_allowable_gradient_n2[16];
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148
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149 //_Bool deco_zone_reached;
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150 _Bool critical_volume_algorithm_off;
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151 float max_first_stop_depth;
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152 float max_deco_ceiling_depth;
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153 long vpm_time_calc_begin = 0;
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154 //Boylslaw compensation
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155 float deco_gradient_he[16];
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156 float deco_gradient_n2[16];
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157 int last_nullzeit;
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158 int vpm_calc_what;
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159 int count_critical_volume_iteration;
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160 short number_of_changes;
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161 float depth_change[11];
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162 float step_size_change[11];
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163 float rate_change[11];
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164 short mix_change[11];
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165
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166 const _Bool vpm_b = true;
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167
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168 //extern
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169 /*extern float tissue_N2_saturation[4][16];
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170 extern float tissue_He_saturation[4][16];
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171 extern long dv_divetime;
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172 extern dive_data_t dive_data;
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173 extern int dive_ambient_pressure_mbar;
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174 extern long dv_seconds_since_last_dive;
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175 extern int tts[4];*/
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176 extern const float float_buehlmann_N2_factor_expositon_20_seconds[];
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177 extern const float float_buehlmann_He_factor_expositon_20_seconds[];
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178 extern const float float_buehlmann_N2_factor_expositon_one_minute[];
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179 extern const float float_buehlmann_He_factor_expositon_one_minute[];
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180 extern const float float_buehlmann_N2_factor_expositon_five_minutes[];
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181 extern const float float_buehlmann_He_factor_expositon_five_minutes[];
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182 extern const float float_buehlmann_N2_factor_expositon_one_hour[];
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183 extern const float float_buehlmann_He_factor_expositon_one_hour[];
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184
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185 //extern buehlmann_configuration_t buehlmann_config;
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186
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187 extern unsigned char CCR_mode; //0x100 // by tissue_calls.c // uchar
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188
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189 //extern gaschange2_t gaschange_CCR_backup[2][BUEHLMANN_STRUCT_MAX_GASES];
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190
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191
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192 float starting_ambient_pressure_global;
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193 float ending_ambient_pressure_global;
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194 float depth_start_of_deco_calc;
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195 float depth_start_of_deco_zone;
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196 float first_stop_depth;
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197 float run_time_start_of_deco_zone;
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198
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199 float r_nint(float *x);
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200 float r_int(float *x);
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201 _Bool repetitive_variables_not_valid = false;
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202 _Bool nullzeit_unter60;
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203 //enum VPM_CALC_STATUS{CALC_END,CALC_BEGIN,CALC_NULLZEIT };
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204 int vpm_calc_status;
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205 _Bool buehlmann_wait_exceeded = false;
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206
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207 SLifeData* pInput = NULL;
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208 SVpm* pVpm = NULL;
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209 SDecoinfo* pDecoInfo = NULL;
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210 SDiveSettings* pDiveSettings = NULL;
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211 float r_nint(float *x)
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212 {
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213 return( (*x)>=0 ?
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214 floorf(*x + 0.5f) : -floorf(0.5f - *x) );
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215 }
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216
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217 float r_int(float *x)
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218 {
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219 return( (*x>0) ? floorf(*x) : -floorf(- *x) );
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220 }
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221
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222 /** private functions
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223 */
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224 int onset_of_impermeability(float *starting_ambient_pressure, float *ending_ambient_pressure, float *rate, short *i);
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225 int radius_root_finder (float *a, float *b, float *c,float *low_bound, float *high_bound, float *ending_radius);
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226 int nuclear_regeneration(float *dive_time);// clock_();
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227 int calc_deco_ceiling(float *deco_ceiling_depth,_Bool fallowablw);
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228
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229 int calc_barometric_pressure(float *altitude);
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230 //extern /* Subroutine */ int vpm_repetitive_algorithm();
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231 //extern /* Subroutine */ int gas_loadings_surface_interval();
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232 int critical_volume(float *deco_phase_volume_time); ;
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233 int calc_start_of_deco_zone(float *starting_depth, float *rate, float *depth_start_of_deco_zone);
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234
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235 int calc_initial_allowable_gradient(void);
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236 void decompression_stop(float *deco_stop_depth, float *step_size, _Bool final_deco_calculation);
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237 int gas_loadings_ascent_descen(float* helium_pressure, float* nitrogen_pressure, float starting_depth,float ending_depth, float rate,_Bool check_gas_change);
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238
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239 int calc_surface_phase_volume_time(void);
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240 int calc_max_actual_gradient(float *deco_stop_depth);
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241 int projected_ascent(float *starting_depth, float *rate, float *deco_stop_depth, float *step_size);
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242 void vpm_calc_deco(void);
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243 int vpm_calc_critcal_volume(_Bool begin,_Bool calc_nulltime);
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244 int vpm_check_converged(_Bool calc_nulltime);
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245 int vpm_calc_final_deco(_Bool begin);
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246 void BOYLES_LAW_COMPENSATION (float* First_Stop_Depth,float * Deco_Stop_Depth,float* Step_Size);
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247 int vpm_calc_nullzeit(void);
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248 int vpm_repetitive_algorithm(float *surface_interval_time);
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249 void vpm_init_1(void);
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250
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251 void vpm_calc_deco_ceiling(void);
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252
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253 //extern /* Subroutine */ int gas_loadings_constant_depth();
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254 //extern /* Subroutine */ int vpm_altitude_dive_algorithm();
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255 //extern /* Subroutine */ int calc_max_actual_gradient(),
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256 //projected_ascent();
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257
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258 void ______X_X_X___________________________________________________________(void);
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259
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260 //#define ARGGG
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261
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262 void vpm_reset_variables(void)
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263 {
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264 repetitive_variables_not_valid = true;
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265 }
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266
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267 void vpm_init_1(void)
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268 {
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269 units_equal_msw = true;
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270 units_equal_fsw = false;
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271 altitude_dive_algorithm_off= true; //!Options: ON or OFF
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272 minimum_deco_stop_time=1.0; //!Options: float positive number
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273 critical_volume_algorithm_off= false; //!Options: ON or OFF
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274 run_time = 0.;
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275 //barometric_pressure = dive_data.surface * 10;
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276
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277 //mix_number = dive_data.selected_gas + 1;
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278
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279 max_first_stop_depth = 0;
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280 max_deco_ceiling_depth = 0;
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281 //deco_zone_reached = false;
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282 depth_start_of_deco_calc = 0;
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283 depth_start_of_deco_zone = 0;
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284 first_stop_depth = 0;
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285 run_time_start_of_deco_zone = 0;
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286
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287 gCNS_VPM = 0;
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288 }
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289
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290 float vpm_get_CNS(void)
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291 {
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292 return gCNS_VPM;
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293 }
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294
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295 int vpm_calc(SLifeData* pINPUT,
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296 SDiveSettings* pSettings,
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297 SVpm* pVPM,
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298 SDecoinfo*
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299 pDECOINFO,
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300 int calc_what)
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301 {
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302 vpm_init_1();
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303 //decom_CreateGasChangeList(pSettings, pINPUT);
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304 vpm_calc_what = calc_what;
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305 /**clear decoInfo*/
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306 pDECOINFO->output_time_to_surface_seconds = 0;
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307 pDECOINFO->output_ndl_seconds = 0;
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308 pDECOINFO->output_ceiling_meter = 0;
247
3949781096d4 feature: Relative GF to Saturation renames
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309 pDECOINFO->super_saturation = 0;
38
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310 uint8_t tmp_calc_status;
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311 for(int i=0;i<DECOINFO_STRUCT_MAX_STOPS;i++)
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312 {
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313 pDECOINFO->output_stop_length_seconds[i] = 0;
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314 }
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315
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316 if(pINPUT->dive_time_seconds < 10)
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317 {
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318 vpm_calc_status = CALC_NULLZEIT;
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319 return vpm_calc_status;
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320 }
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321 pVpm = pVPM;
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322 pInput = pINPUT;
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323 pDecoInfo = pDECOINFO;
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324 pDiveSettings = pSettings;
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325
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326 if(vpm_calc_status == CALC_NULLZEIT)
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327 {
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328 tmp_calc_status = vpm_calc_nullzeit();
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329 }
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330 else
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331 {
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332 tmp_calc_status = CALC_BEGIN;
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333 }
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334 //Normal Deco calculation
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335 if(tmp_calc_status != CALC_NULLZEIT)
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336 {
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337 max_first_stop_depth = pVpm->max_first_stop_depth_save;
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338 run_time_start_of_deco_zone = pVpm->run_time_start_of_deco_zone_save;
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339 depth_start_of_deco_zone = pVpm->depth_start_of_deco_zone_save;
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340 for (int i = 0; i < 16; ++i) {
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341 helium_pressure[i] = pInput->tissue_helium_bar[i] * 10;
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342 nitrogen_pressure[i] = pInput->tissue_nitrogen_bar[i] * 10;
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343 }
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344 vpm_calc_deco();
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345 tmp_calc_status = vpm_calc_critcal_volume(true,false);
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346 if(vpm_calc_what == DECOSTOPS)
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347 {
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348 pVpm->max_first_stop_depth_save = max_first_stop_depth;
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349 pVpm->run_time_start_of_deco_zone_save = run_time_start_of_deco_zone;
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350 pVpm->depth_start_of_deco_zone_save = depth_start_of_deco_zone;
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351 }
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352 }
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353
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354 //Only Decostops not futute stops
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355 if(vpm_calc_what == DECOSTOPS)
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356 vpm_calc_status = tmp_calc_status;
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357 return vpm_calc_status;
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358 }
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359
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360 void vpm_saturation_after_ascent(SLifeData* input)
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361 {
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362 int i = 0;
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363 for (i = 0; i < 16; ++i) {
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364 pInput->tissue_helium_bar[i] = helium_pressure[i] / 10;
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365 pInput->tissue_nitrogen_bar[i] = nitrogen_pressure[i] / 10;
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366 }
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367 pInput->pressure_ambient_bar = pInput->pressure_surface_bar;
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368 }
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heinrichsweikamp
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369 /* =============================================================================== */
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370 /* NOTE ABOUT PRESSURE UNITS USED IN CALCULATIONS: */
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parents:
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371 /* It is the convention in decompression calculations to compute all gas */
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parents:
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372 /* loadings, absolute pressures, partial pressures, etc., in the units of */
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parents:
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373 /* depth pressure that you are diving - either feet of seawater (fsw) or */
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374 /* meters of seawater (msw). This program follows that convention with the */
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heinrichsweikamp
parents:
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375 /* the exception that all VPM calculations are performed in SI units (by */
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heinrichsweikamp
parents:
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376 /* necessity). Accordingly, there are several conversions back and forth */
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heinrichsweikamp
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377 /* between the diving pressure units and the SI units. */
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heinrichsweikamp
parents:
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378 /* =============================================================================== */
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heinrichsweikamp
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379 /* =============================================================================== */
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heinrichsweikamp
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380 /* FUNCTION SUBPROGRAM FOR GAS LOADING CALCULATIONS - ASCENT AND DESCENT */
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381 /* =============================================================================== */
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382
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383
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384
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385 /* =============================================================================== */
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parents:
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386 /* SUBROUTINE GAS_LOADINGS_ASCENT_DESCENT */
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heinrichsweikamp
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387 /* Purpose: This subprogram applies the Schreiner equation to update the */
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388 /* gas loadings (partial pressures of helium and nitrogen) in the half-time */
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389 /* compartments due to a linear ascent or descent segment at a constant rate. */
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390 /* =============================================================================== */
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391
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392 int gas_loadings_ascent_descen(float* helium_pressure,
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393 float* nitrogen_pressure,
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394 float starting_depth,
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heinrichsweikamp
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395 float ending_depth,
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396 float rate,_Bool check_gas_change)
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397 {
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398 short i;
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399 float initial_inspired_n2_pressure,
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400 initial_inspired_he_pressure, nitrogen_rate,
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401 last_run_time,
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402 starting_ambient_pressure,
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403 ending_ambient_pressure;
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404 float initial_helium_pressure[16];
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405 float initial_nitrogen_pressure[16];
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406 float helium_rate;
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heinrichsweikamp
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407 float fraction_helium_begin;
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parents:
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408 float fraction_helium_end;
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heinrichsweikamp
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409 float fraction_nitrogen_begin;
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heinrichsweikamp
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410 float fraction_nitrogen_end;
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411 float ending_depth_tmp = ending_depth;
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412 float segment_time_tmp = 0;
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heinrichsweikamp
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413 /* loop */
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heinrichsweikamp
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414 /* =============================================================================== */
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heinrichsweikamp
parents:
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415 /* CALCULATIONS */
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416 /* =============================================================================== */
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417 segment_time = (ending_depth_tmp - starting_depth) / rate;
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418 last_run_time = run_time;
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419 run_time = last_run_time + segment_time;
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420 do {
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421 ending_depth_tmp = ending_depth;
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422 if (starting_depth > ending_depth && check_gas_change && number_of_changes > 1)
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423 {
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424 for (i = 1; i < number_of_changes; ++i)
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425 {
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426 if (depth_change[i] < starting_depth && depth_change[i] > ending_depth)
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427 {
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428 ending_depth_tmp = depth_change[i];
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429 break;
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430 }
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431 }
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432 for (i = 1; i < number_of_changes; ++i)
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433 {
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434 if (depth_change[i] >= starting_depth)
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435 {
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436 mix_number = mix_change[i];
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437 }
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438 }
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439 }
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440 segment_time_tmp = (ending_depth_tmp - starting_depth) / rate;
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441 ending_ambient_pressure = ending_depth_tmp + barometric_pressure;
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442 starting_ambient_pressure = starting_depth + barometric_pressure;
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443 decom_get_inert_gases( starting_ambient_pressure / 10, (&pDiveSettings->decogaslist[mix_number]), &fraction_nitrogen_begin, &fraction_helium_begin );
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444 decom_get_inert_gases( ending_ambient_pressure / 10, (&pDiveSettings->decogaslist[mix_number]), &fraction_nitrogen_end, &fraction_helium_end );
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445
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446 initial_inspired_he_pressure = (starting_ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_helium_begin;
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447 initial_inspired_n2_pressure = (starting_ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_nitrogen_begin;
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448 //helium_rate = *rate * fraction_helium[mix_number - 1];
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449 helium_rate = ((ending_ambient_pressure - WATER_VAPOR_PRESSURE)* fraction_helium_end - initial_inspired_he_pressure)/segment_time_tmp;
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450 //nitrogen_rate2 = *rate * fraction_nitrogen[mix_number - 1];
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451 nitrogen_rate = ((ending_ambient_pressure - WATER_VAPOR_PRESSURE)* fraction_nitrogen_end - initial_inspired_n2_pressure)/segment_time_tmp;
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heinrichsweikamp
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452
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heinrichsweikamp
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453
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454 decom_oxygen_calculate_cns_stage_SchreinerStyle(segment_time_tmp,&pDiveSettings->decogaslist[mix_number],starting_ambient_pressure/10,ending_ambient_pressure/10,&gCNS_VPM);
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455 //if(fabs(nitrogen_rate - nitrogen_rate2) > 0.000001)
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parents:
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456 //return -2;
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457 for (i = 1; i <= 16; ++i)
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parents:
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458 {
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459 initial_helium_pressure[i - 1] = helium_pressure[i - 1];
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460 initial_nitrogen_pressure[i - 1] = nitrogen_pressure[i - 1];
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461 helium_pressure[i - 1] =
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462 schreiner_equation__2(&initial_inspired_he_pressure,
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heinrichsweikamp
parents:
diff changeset
463 &helium_rate,
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heinrichsweikamp
parents:
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464 &segment_time,
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heinrichsweikamp
parents:
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465 &HELIUM_TIME_CONSTANT[i - 1],
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heinrichsweikamp
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466 &initial_helium_pressure[i - 1]);
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467 nitrogen_pressure[i - 1] =
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heinrichsweikamp
parents:
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468 schreiner_equation__2(&initial_inspired_n2_pressure,
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heinrichsweikamp
parents:
diff changeset
469 &nitrogen_rate,
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heinrichsweikamp
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diff changeset
470 &segment_time,
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heinrichsweikamp
parents:
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471 &NITROGEN_TIME_CONSTANT[i - 1],
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heinrichsweikamp
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472 &initial_nitrogen_pressure[i - 1]);
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heinrichsweikamp
parents:
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473
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parents:
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474 //nextround???
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heinrichsweikamp
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475
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476 }
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477 starting_depth = ending_depth_tmp;
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478 } while(ending_depth_tmp > ending_depth);
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479
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480 return 0;
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481 } /* gas_loadings_ascent_descen */
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482
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483 float last_phase_volume_time[16];
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heinrichsweikamp
parents:
diff changeset
484 float n2_pressure_start_of_deco_zone[16];
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heinrichsweikamp
parents:
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485 float he_pressure_start_of_deco_zone[16];
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heinrichsweikamp
parents:
diff changeset
486 float phase_volume_time[16];
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heinrichsweikamp
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487 float n2_pressure_start_of_ascent[16];
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heinrichsweikamp
parents:
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488 float he_pressure_start_of_ascent[16];
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heinrichsweikamp
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489 float run_time_start_of_deco_calc;
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heinrichsweikamp
parents:
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490 float starting_depth;
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heinrichsweikamp
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491 float last_run_time;
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heinrichsweikamp
parents:
diff changeset
492 float deco_phase_volume_time;
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heinrichsweikamp
parents:
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493
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494 float run_time_start_of_ascent;
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heinrichsweikamp
parents:
diff changeset
495
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heinrichsweikamp
parents:
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496 float rate;
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heinrichsweikamp
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497 float step_size;
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498 _Bool vpm_violates_buehlmann;
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heinrichsweikamp
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499
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heinrichsweikamp
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500 void vpm_calc_deco(void)
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heinrichsweikamp
parents:
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501 {
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heinrichsweikamp
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502 /* System generated locals */
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heinrichsweikamp
parents:
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503
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504 //float deepest_possible_stop_depth;
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heinrichsweikamp
parents:
diff changeset
505 // altitude_of_dive,
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heinrichsweikamp
parents:
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506 short i;
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heinrichsweikamp
parents:
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507 int j = 0;
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heinrichsweikamp
parents:
diff changeset
508
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509 // float rounding_operation;
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heinrichsweikamp
parents:
diff changeset
510
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heinrichsweikamp
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511 /* =============================================================================== */
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heinrichsweikamp
parents:
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512 /* INPUT PARAMETERS TO BE USED FOR STAGED DECOMPRESSION AND SAVE IN ARRAYS. */
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heinrichsweikamp
parents:
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513 /* ASSIGN INITAL PARAMETERS TO BE USED AT START OF ASCENT */
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heinrichsweikamp
parents:
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514 /* The user has the ability to change mix, ascent rate, and step size in any */
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heinrichsweikamp
parents:
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515 /* combination at any depth during the ascent. */
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heinrichsweikamp
parents:
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516 /* =============================================================================== */
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heinrichsweikamp
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517
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518 run_time = ((float)pInput->dive_time_seconds )/ 60;
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519 count_critical_volume_iteration = 0;
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diff changeset
520 number_of_changes = 1;
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heinrichsweikamp
parents:
diff changeset
521
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heinrichsweikamp
parents:
diff changeset
522 barometric_pressure = pInput->pressure_surface_bar * 10;
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heinrichsweikamp
parents:
diff changeset
523 depth_change[0] =(pInput->pressure_ambient_bar - pInput->pressure_surface_bar)* 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
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diff changeset
524 mix_change[0] = 0;
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heinrichsweikamp
parents:
diff changeset
525 rate_change[0 ] = -10;// neu 160215 hw, zuvor: -12;
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heinrichsweikamp
parents:
diff changeset
526 step_size_change[0] = 3;
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heinrichsweikamp
parents:
diff changeset
527 vpm_violates_buehlmann = false;
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heinrichsweikamp
parents:
diff changeset
528
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heinrichsweikamp
parents:
diff changeset
529 for (i = 1; i < BUEHLMANN_STRUCT_MAX_GASES; i++)
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heinrichsweikamp
parents:
diff changeset
530 {
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heinrichsweikamp
parents:
diff changeset
531 depth_change[i] = 0;
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heinrichsweikamp
parents:
diff changeset
532 mix_change[i] = 0;
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heinrichsweikamp
parents:
diff changeset
533 }
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heinrichsweikamp
parents:
diff changeset
534 j = 0;
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heinrichsweikamp
parents:
diff changeset
535
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heinrichsweikamp
parents:
diff changeset
536 for (i = 1; i < BUEHLMANN_STRUCT_MAX_GASES; i++)
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heinrichsweikamp
parents:
diff changeset
537 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
538 if(pDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero >= depth_change[0] + 1)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
539 continue;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
540
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heinrichsweikamp
parents:
diff changeset
541 if(pDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero <= 0)
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heinrichsweikamp
parents:
diff changeset
542 break;
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heinrichsweikamp
parents:
diff changeset
543
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
544 j++;
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heinrichsweikamp
parents:
diff changeset
545 number_of_changes ++;
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heinrichsweikamp
parents:
diff changeset
546 depth_change[j] = pDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero ;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
547 mix_change[j] = i;
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heinrichsweikamp
parents:
diff changeset
548 rate_change[j] = -10;// neu 160215 hw, zuvor: -12;
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heinrichsweikamp
parents:
diff changeset
549 step_size_change[j] = 3;
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heinrichsweikamp
parents:
diff changeset
550 }
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heinrichsweikamp
parents:
diff changeset
551
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heinrichsweikamp
parents:
diff changeset
552 starting_depth = depth_change[0] ;
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heinrichsweikamp
parents:
diff changeset
553 mix_number = mix_change[0] ;
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heinrichsweikamp
parents:
diff changeset
554 rate = rate_change[0];
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heinrichsweikamp
parents:
diff changeset
555 step_size = step_size_change[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
556
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
557 for (i = 0; i < 16; ++i) {
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heinrichsweikamp
parents:
diff changeset
558 he_pressure_start_of_ascent[i ] = helium_pressure[i];
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heinrichsweikamp
parents:
diff changeset
559 n2_pressure_start_of_ascent[i] = nitrogen_pressure[i];
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heinrichsweikamp
parents:
diff changeset
560 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
561 run_time_start_of_ascent = run_time;
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heinrichsweikamp
parents:
diff changeset
562 if(starting_depth <= depth_start_of_deco_zone && vpm_calc_what == DECOSTOPS)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
563 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
564 pVpm->deco_zone_reached = true;
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heinrichsweikamp
parents:
diff changeset
565 depth_start_of_deco_calc = starting_depth;
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heinrichsweikamp
parents:
diff changeset
566 critical_volume_algorithm_off = true;
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heinrichsweikamp
parents:
diff changeset
567 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
568 else
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heinrichsweikamp
parents:
diff changeset
569 {
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heinrichsweikamp
parents:
diff changeset
570 //if(deco_zone_reached)
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heinrichsweikamp
parents:
diff changeset
571 //{
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heinrichsweikamp
parents:
diff changeset
572 pVpm->deco_zone_reached = false;
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heinrichsweikamp
parents:
diff changeset
573 critical_volume_algorithm_off = false;
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heinrichsweikamp
parents:
diff changeset
574 //max_first_stop_depth = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
575 //max_first_stop_depth_save = 0;
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heinrichsweikamp
parents:
diff changeset
576 //}
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heinrichsweikamp
parents:
diff changeset
577 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
578 /* BEGIN PROCESS OF ASCENT AND DECOMPRESSION */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
579 /* First, calculate the regeneration of critical radii that takes place over */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
580 /* the dive time. The regeneration time constant has a time scale of weeks */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
581 /* so this will have very little impact on dives of normal length, but will */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
582 /* have major impact for saturation dives. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
583 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
584
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
585 nuclear_regeneration(&run_time);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
586
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
587 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
588 /* CALCULATE INITIAL ALLOWABLE GRADIENTS FOR ASCENT */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
589 /* This is based on the maximum effective crushing pressure on critical radii */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
590 /* in each compartment achieved during the dive profile. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
591 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
592
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
593 calc_initial_allowable_gradient();
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
594
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
595 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
596 /* SAVE VARIABLES AT START OF ASCENT (END OF BOTTOM TIME) SINCE THESE WILL */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
597 /* BE USED LATER TO COMPUTE THE FINAL ASCENT PROFILE THAT IS WRITTEN TO THE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
598 /* OUTPUT FILE. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
599 /* The VPM uses an iterative process to compute decompression schedules so */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
600 /* there will be more than one pass through the decompression loop. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
601 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
602
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
603 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
604 /* CALCULATE THE DEPTH WHERE THE DECOMPRESSION ZONE BEGINS FOR THIS PROFILE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
605 /* BASED ON THE INITIAL ASCENT PARAMETERS AND WRITE THE DEEPEST POSSIBLE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
606 /* DECOMPRESSION STOP DEPTH TO THE OUTPUT FILE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
607 /* Knowing where the decompression zone starts is very important. Below */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
608 /* that depth there is no possibility for bubble formation because there */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
609 /* will be no supersaturation gradients. Deco stops should never start */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
610 /* below the deco zone. The deepest possible stop deco stop depth is */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
611 /* defined as the next "standard" stop depth above the point where the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
612 /* leading compartment enters the deco zone. Thus, the program will not */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
613 /* base this calculation on step sizes larger than 10 fsw or 3 msw. The */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
614 /* deepest possible stop depth is not used in the program, per se, rather */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
615 /* it is information to tell the diver where to start putting on the brakes */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
616 /* during ascent. This should be prominently displayed by any deco program. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
617 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
618
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
619 calc_start_of_deco_zone(&starting_depth, &rate, &depth_start_of_deco_zone);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
620 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
621 /* TEMPORARILY ASCEND PROFILE TO THE START OF THE DECOMPRESSION ZONE, SAVE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
622 /* VARIABLES AT THIS POINT, AND INITIALIZE VARIABLES FOR CRITICAL VOLUME LOOP */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
623 /* The iterative process of the VPM Critical Volume Algorithm will operate */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
624 /* only in the decompression zone since it deals with excess gas volume */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
625 /* released as a result of supersaturation gradients (not possible below the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
626 /* decompression zone). */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
627 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
628 gas_loadings_ascent_descen(helium_pressure,nitrogen_pressure, starting_depth, depth_start_of_deco_zone, rate, true);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
629
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
630 run_time_start_of_deco_zone = run_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
631 depth_start_of_deco_calc = depth_start_of_deco_zone;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
632
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
633 for (i = 0; i < 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
634 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
635 pVpm->max_actual_gradient[i] = 0.;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
636 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
637 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
638
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heinrichsweikamp
parents:
diff changeset
639 for (i = 0; i < 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
640 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
641 surface_phase_volume_time[i] = 0.;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
642 last_phase_volume_time[i] = 0.;
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heinrichsweikamp
parents:
diff changeset
643 he_pressure_start_of_deco_zone[i] = helium_pressure[i];
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heinrichsweikamp
parents:
diff changeset
644 n2_pressure_start_of_deco_zone[i] = nitrogen_pressure[i];
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heinrichsweikamp
parents:
diff changeset
645 //pVpm->max_actual_gradient[i] = 0.;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
646 }
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heinrichsweikamp
parents:
diff changeset
647 run_time_start_of_deco_calc = run_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
648 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
649 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
650 /* START OF CRITICAL VOLUME LOOP */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
651 /* This loop operates between Lines 50 and 100. If the Critical Volume */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
652 /* Algorithm is toggled "off" in the program settings, there will only be */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
653 /* one pass through this loop. Otherwise, there will be two or more passes */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
654 /* through this loop until the deco schedule is "converged" - that is when a */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
655 /* comparison between the phase volume time of the present iteration and the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
656 /* last iteration is less than or equal to one minute. This implies that */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
657 /* the volume of released gas in the most recent iteration differs from the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
658 /* "critical" volume limit by an acceptably small amount. The critical */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
659 /* volume limit is set by the Critical Volume Parameter Lambda in the program */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
660 /* settings (default setting is 7500 fsw-min with adjustability range from */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
661 /* from 6500 to 8300 fsw-min according to Bruce Wienke). */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
662 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
663 /* L50: */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
664
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heinrichsweikamp
parents:
diff changeset
665 float deco_stop_depth;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
666 int vpm_calc_critcal_volume(_Bool begin,
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heinrichsweikamp
parents:
diff changeset
667 _Bool calc_nulltime)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
668 { /* loop will run continuous there is an exit stateme */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
669
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
670 short i;
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heinrichsweikamp
parents:
diff changeset
671
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heinrichsweikamp
parents:
diff changeset
672 float rounding_operation2;
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heinrichsweikamp
parents:
diff changeset
673 //float ending_depth;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
674 float deco_ceiling_depth;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
675
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heinrichsweikamp
parents:
diff changeset
676 //float deco_time;
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heinrichsweikamp
parents:
diff changeset
677 int count = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
678 _Bool first_stop;
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heinrichsweikamp
parents:
diff changeset
679 int dp = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
680 float tissue_He_saturation[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
681 float tissue_N2_saturation[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
682 float vpm_buehlmann_safety_gradient = 1.0f - (((float)pDiveSettings->vpm_conservatism) / 40);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
683 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
684 /* CALCULATE CURRENT DECO CEILING BASED ON ALLOWABLE SUPERSATURATION */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
685 /* GRADIENTS AND SET FIRST DECO STOP. CHECK TO MAKE SURE THAT SELECTED STEP */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
686 /* SIZE WILL NOT ROUND UP FIRST STOP TO A DEPTH THAT IS BELOW THE DECO ZONE. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
687 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
688 if(begin)
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heinrichsweikamp
parents:
diff changeset
689 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
690 if(depth_start_of_deco_calc < max_first_stop_depth )
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
691 {
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heinrichsweikamp
parents:
diff changeset
692 if(vpm_b)
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heinrichsweikamp
parents:
diff changeset
693 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
694 BOYLES_LAW_COMPENSATION(&max_first_stop_depth, &depth_start_of_deco_calc, &step_size);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
695 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
696 calc_deco_ceiling(&deco_ceiling_depth, false);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
697 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
698 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
699 calc_deco_ceiling(&deco_ceiling_depth, true);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
700
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
701
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
702 if (deco_ceiling_depth <= 0.0f) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
703 deco_stop_depth = 0.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
704 } else {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
705 rounding_operation2 = deco_ceiling_depth / step_size + ( float)0.5f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
706 deco_stop_depth = r_nint(&rounding_operation2) * step_size;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
707 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
708
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
709 // buehlmann safety
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
710 if(buehlmannSafety)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
711 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
712 for (i = 0; i < 16; i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
713 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
714 tissue_He_saturation[i] = helium_pressure[i] / 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
715 tissue_N2_saturation[i] = nitrogen_pressure[i] / 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
716 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
717
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
718 if(!decom_tissue_test_tolerance(tissue_N2_saturation, tissue_He_saturation, vpm_buehlmann_safety_gradient, (deco_stop_depth / 10.0f) + pInput->pressure_surface_bar))
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
719 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
720
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
721 vpm_violates_buehlmann = true;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
722 do {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
723 deco_stop_depth += 3;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
724 } while (!decom_tissue_test_tolerance(tissue_N2_saturation, tissue_He_saturation, vpm_buehlmann_safety_gradient, (deco_stop_depth / 10.0f) + pInput->pressure_surface_bar));
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
725 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
726 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
727
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
728 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
729 /* PERFORM A SEPARATE "PROJECTED ASCENT" OUTSIDE OF THE MAIN PROGRAM TO MAKE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
730 /* SURE THAT AN INCREASE IN GAS LOADINGS DURING ASCENT TO THE FIRST STOP WILL */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
731 /* NOT CAUSE A VIOLATION OF THE DECO CEILING. IF SO, ADJUST THE FIRST STOP */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
732 /* DEEPER BASED ON STEP SIZE UNTIL A SAFE ASCENT CAN BE MADE. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
733 /* Note: this situation is a possibility when ascending from extremely deep */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
734 /* dives or due to an unusual gas mix selection. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
735 /* CHECK AGAIN TO MAKE SURE THAT ADJUSTED FIRST STOP WILL NOT BE BELOW THE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
736 /* DECO ZONE. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
737 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
738 if (deco_stop_depth < depth_start_of_deco_calc)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
739 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
740 projected_ascent(&depth_start_of_deco_calc, &rate, &deco_stop_depth, &step_size);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
741 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
742
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
743 /*if (deco_stop_depth > depth_start_of_deco_zone) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
744 printf("\t\n");
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
745 printf(fmt_905);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
746 printf(fmt_900);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
747 printf("\nPROGRAM TERMINATED\n");
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
748 exit(1);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
749 }*/
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
750
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
751 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
752 /* HANDLE THE SPECIAL CASE WHEN NO DECO STOPS ARE REQUIRED - ASCENT CAN BE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
753 /* MADE DIRECTLY TO THE SURFACE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
754 /* Write ascent data to output file and exit the Critical Volume Loop. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
755 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
756
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
757 if (deco_stop_depth == 0.0f)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
758 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
759 if(calc_nulltime)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
760 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
761 return CALC_END;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
762 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
763 if(pVpm->deco_zone_reached)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
764 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
765 for(dp = 0;dp < DECOINFO_STRUCT_MAX_STOPS;dp++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
766 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
767 pDecoInfo->output_stop_length_seconds[dp] = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
768 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
769 pDecoInfo->output_ndl_seconds = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
770 /*max_first_stop_depth = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
771 deco_zone_reached = false;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
772 depth_start_of_deco_calc = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
773 depth_start_of_deco_zone = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
774 first_stop_depth = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
775 max_first_stop_depth_save = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
776 depth_start_of_deco_zone_save = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
777 run_time_start_of_deco_zone_save = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
778 tts[DECOSTOPS] = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
779 tts[NULLZEIT] = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
780 tts[FUTURESTOPS] = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
781 nullzeit_unter60 = false;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
782 vpm_calc_status = CALC_NULLZEIT;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
783 vpm_calc_what = DECOSTOPS;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
784 float surfacetime = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
785 vpm_repetitive_algorithm(&surfacetime);*/
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
786
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
787 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
788
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
789 return CALC_NULLZEIT;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
790 /* exit the critical volume l */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
791 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
792
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
793 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
794 /* ASSIGN VARIABLES FOR ASCENT FROM START OF DECO ZONE TO FIRST STOP. SAVE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
795 /* FIRST STOP DEPTH FOR LATER USE WHEN COMPUTING THE FINAL ASCENT PROFILE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
796 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
797 deco_stop_depth = fmaxf(deco_stop_depth,(float)pDiveSettings->last_stop_depth_bar * 10);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
798 starting_depth = depth_start_of_deco_calc;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
799 first_stop_depth = deco_stop_depth;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
800 first_stop = true;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
801 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
802 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
803 /* DECO STOP LOOP BLOCK WITHIN CRITICAL VOLUME LOOP */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
804 /* This loop computes a decompression schedule to the surface during each */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
805 /* iteration of the critical volume loop. No output is written from this */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
806 /* loop, rather it computes a schedule from which the in-water portion of the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
807 /* total phase volume time (Deco_Phase_Volume_Time) can be extracted. Also, */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
808 /* the gas loadings computed at the end of this loop are used the subroutine */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
809 /* which computes the out-of-water portion of the total phase volume time */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
810 /* (Surface_Phase_Volume_Time) for that schedule. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
811
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
812 /* Note that exit is made from the loop after last ascent is made to a deco */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
813 /* stop depth that is less than or equal to zero. A final deco stop less */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
814 /* than zero can happen when the user makes an odd step size change during */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
815 /* ascent - such as specifying a 5 msw step size change at the 3 msw stop! */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
816 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
817
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
818 while(true) /* loop will run continuous there is an break statement */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
819 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
820 if(starting_depth > deco_stop_depth )
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
821 gas_loadings_ascent_descen(helium_pressure, nitrogen_pressure, starting_depth, deco_stop_depth, rate,first_stop);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
822
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
823 first_stop = false;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
824 if (deco_stop_depth <= 0.0f)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
825 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
826 break;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
827 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
828 if (number_of_changes > 1)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
829 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
830 int i1 = number_of_changes;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
831 for (i = 2; i <= i1; ++i) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
832 if (depth_change[i - 1] >= deco_stop_depth)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
833 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
834 mix_number = mix_change[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
835 rate = rate_change[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
836 step_size = step_size_change[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
837 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
838 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
839 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
840 if(vpm_b)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
841 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
842 float fist_stop_depth2 = fmaxf(first_stop_depth,max_first_stop_depth);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
843 BOYLES_LAW_COMPENSATION(&fist_stop_depth2, &deco_stop_depth, &step_size);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
844 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
845 decompression_stop(&deco_stop_depth, &step_size, false);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
846 starting_depth = deco_stop_depth;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
847
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
848 if(deco_stop_depth == (float)pDiveSettings->last_stop_depth_bar * 10)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
849 deco_stop_depth = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
850 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
851 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
852 deco_stop_depth = deco_stop_depth - step_size;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
853 deco_stop_depth = fmaxf(deco_stop_depth,(float)pDiveSettings->last_stop_depth_bar * 10);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
854 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
855
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
856 count++;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
857 //if(count > 14)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
858 //return CALC_CRITICAL2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
859 /* L60: */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
860 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
861
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
862 return vpm_check_converged(calc_nulltime);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
863 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
864 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
865 /* COMPUTE TOTAL PHASE VOLUME TIME AND MAKE CRITICAL VOLUME COMPARISON */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
866 /* The deco phase volume time is computed from the run time. The surface */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
867 /* phase volume time is computed in a subroutine based on the surfacing gas */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
868 /* loadings from previous deco loop block. Next the total phase volume time */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
869 /* (in-water + surface) for each compartment is compared against the previous */
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heinrichsweikamp
parents:
diff changeset
870 /* total phase volume time. The schedule is converged when the difference is */
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heinrichsweikamp
parents:
diff changeset
871 /* less than or equal to 1 minute in any one of the 16 compartments. */
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heinrichsweikamp
parents:
diff changeset
872
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heinrichsweikamp
parents:
diff changeset
873 /* Note: the "phase volume time" is somewhat of a mathematical concept. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
874 /* It is the time divided out of a total integration of supersaturation */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
875 /* gradient x time (in-water and surface). This integration is multiplied */
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heinrichsweikamp
parents:
diff changeset
876 /* by the excess bubble number to represent the amount of free-gas released */
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heinrichsweikamp
parents:
diff changeset
877 /* as a result of allowing a certain number of excess bubbles to form. */
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heinrichsweikamp
parents:
diff changeset
878 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
879 /* end of deco stop loop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
880
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heinrichsweikamp
parents:
diff changeset
881 int vpm_check_converged(_Bool calc_nulltime)
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heinrichsweikamp
parents:
diff changeset
882 {
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heinrichsweikamp
parents:
diff changeset
883
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heinrichsweikamp
parents:
diff changeset
884 short i;
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heinrichsweikamp
parents:
diff changeset
885 float critical_volume_comparison;
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heinrichsweikamp
parents:
diff changeset
886 float r1;
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heinrichsweikamp
parents:
diff changeset
887 _Bool schedule_converged = false;
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heinrichsweikamp
parents:
diff changeset
888
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heinrichsweikamp
parents:
diff changeset
889
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heinrichsweikamp
parents:
diff changeset
890 deco_phase_volume_time = run_time - run_time_start_of_deco_zone;
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heinrichsweikamp
parents:
diff changeset
891 calc_surface_phase_volume_time();
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heinrichsweikamp
parents:
diff changeset
892
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heinrichsweikamp
parents:
diff changeset
893 for (i = 1; i <= 16; ++i)
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heinrichsweikamp
parents:
diff changeset
894 {
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heinrichsweikamp
parents:
diff changeset
895 phase_volume_time[i - 1] =
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heinrichsweikamp
parents:
diff changeset
896 deco_phase_volume_time + surface_phase_volume_time[i - 1];
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heinrichsweikamp
parents:
diff changeset
897 critical_volume_comparison = (r1 = phase_volume_time[i - 1] - last_phase_volume_time[i - 1], fabs(r1));
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
898
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heinrichsweikamp
parents:
diff changeset
899 if (critical_volume_comparison <= 1.0f)
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heinrichsweikamp
parents:
diff changeset
900 {
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heinrichsweikamp
parents:
diff changeset
901 schedule_converged = true;
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heinrichsweikamp
parents:
diff changeset
902 }
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heinrichsweikamp
parents:
diff changeset
903 }
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heinrichsweikamp
parents:
diff changeset
904
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heinrichsweikamp
parents:
diff changeset
905 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
906 /* CRITICAL VOLUME DECISION TREE BETWEEN LINES 70 AND 99 */
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heinrichsweikamp
parents:
diff changeset
907 /* There are two options here. If the Critical Volume Agorithm setting is */
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heinrichsweikamp
parents:
diff changeset
908 /* "on" and the schedule is converged, or the Critical Volume Algorithm */
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heinrichsweikamp
parents:
diff changeset
909 /* setting was "off" in the first place, the program will re-assign variables */
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heinrichsweikamp
parents:
diff changeset
910 /* to their values at the start of ascent (end of bottom time) and process */
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heinrichsweikamp
parents:
diff changeset
911 /* a complete decompression schedule once again using all the same ascent */
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heinrichsweikamp
parents:
diff changeset
912 /* parameters and first stop depth. This decompression schedule will match */
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heinrichsweikamp
parents:
diff changeset
913 /* the last iteration of the Critical Volume Loop and the program will write */
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heinrichsweikamp
parents:
diff changeset
914 /* the final deco schedule to the output file. */
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heinrichsweikamp
parents:
diff changeset
915
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heinrichsweikamp
parents:
diff changeset
916 /* Note: if the Critical Volume Agorithm setting was "off", the final deco */
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heinrichsweikamp
parents:
diff changeset
917 /* schedule will be based on "Initial Allowable Supersaturation Gradients." */
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heinrichsweikamp
parents:
diff changeset
918 /* If it was "on", the final schedule will be based on "Adjusted Allowable */
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heinrichsweikamp
parents:
diff changeset
919 /* Supersaturation Gradients" (gradients that are "relaxed" as a result of */
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heinrichsweikamp
parents:
diff changeset
920 /* the Critical Volume Algorithm). */
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heinrichsweikamp
parents:
diff changeset
921
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heinrichsweikamp
parents:
diff changeset
922 /* If the Critical Volume Agorithm setting is "on" and the schedule is not */
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heinrichsweikamp
parents:
diff changeset
923 /* converged, the program will re-assign variables to their values at the */
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heinrichsweikamp
parents:
diff changeset
924 /* start of the deco zone and process another trial decompression schedule. */
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heinrichsweikamp
parents:
diff changeset
925 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
926 /* L70: */
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heinrichsweikamp
parents:
diff changeset
927 //Not more than 4 iteration allowed
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heinrichsweikamp
parents:
diff changeset
928 count_critical_volume_iteration++;
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heinrichsweikamp
parents:
diff changeset
929 if(count_critical_volume_iteration > 4)
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heinrichsweikamp
parents:
diff changeset
930 {
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heinrichsweikamp
parents:
diff changeset
931 //return CALC_FINAL_DECO;
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heinrichsweikamp
parents:
diff changeset
932 if(calc_nulltime)
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heinrichsweikamp
parents:
diff changeset
933 return CALC_FINAL_DECO;
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heinrichsweikamp
parents:
diff changeset
934 else
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heinrichsweikamp
parents:
diff changeset
935 return vpm_calc_final_deco(true);
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heinrichsweikamp
parents:
diff changeset
936 }
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heinrichsweikamp
parents:
diff changeset
937 if (schedule_converged || critical_volume_algorithm_off)
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heinrichsweikamp
parents:
diff changeset
938 {
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heinrichsweikamp
parents:
diff changeset
939
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heinrichsweikamp
parents:
diff changeset
940 //return CALC_FINAL_DECO;
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heinrichsweikamp
parents:
diff changeset
941 if(calc_nulltime)
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heinrichsweikamp
parents:
diff changeset
942 return CALC_FINAL_DECO;
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heinrichsweikamp
parents:
diff changeset
943 else
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heinrichsweikamp
parents:
diff changeset
944 return vpm_calc_final_deco(true);
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heinrichsweikamp
parents:
diff changeset
945 /* final deco schedule */
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heinrichsweikamp
parents:
diff changeset
946 /* exit critical volume l */
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heinrichsweikamp
parents:
diff changeset
947
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heinrichsweikamp
parents:
diff changeset
948 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
949 /* IF SCHEDULE NOT CONVERGED, COMPUTE RELAXED ALLOWABLE SUPERSATURATION */
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heinrichsweikamp
parents:
diff changeset
950 /* GRADIENTS WITH VPM CRITICAL VOLUME ALGORITHM AND PROCESS ANOTHER */
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heinrichsweikamp
parents:
diff changeset
951 /* ITERATION OF THE CRITICAL VOLUME LOOP */
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heinrichsweikamp
parents:
diff changeset
952 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
953
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heinrichsweikamp
parents:
diff changeset
954 } else {
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heinrichsweikamp
parents:
diff changeset
955 critical_volume(&deco_phase_volume_time);
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heinrichsweikamp
parents:
diff changeset
956 deco_phase_volume_time = 0.;
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heinrichsweikamp
parents:
diff changeset
957 run_time = run_time_start_of_deco_calc;
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heinrichsweikamp
parents:
diff changeset
958 starting_depth = depth_start_of_deco_calc;
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heinrichsweikamp
parents:
diff changeset
959 mix_number = mix_change[0];
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heinrichsweikamp
parents:
diff changeset
960 rate = rate_change[0];
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heinrichsweikamp
parents:
diff changeset
961 step_size = step_size_change[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
962 for (i = 1; i <= 16; ++i)
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heinrichsweikamp
parents:
diff changeset
963 {
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heinrichsweikamp
parents:
diff changeset
964 last_phase_volume_time[i - 1] = phase_volume_time[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
965 helium_pressure[i - 1] = he_pressure_start_of_deco_zone[i - 1];
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heinrichsweikamp
parents:
diff changeset
966 nitrogen_pressure[i - 1] = n2_pressure_start_of_deco_zone[i - 1];
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heinrichsweikamp
parents:
diff changeset
967 }
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heinrichsweikamp
parents:
diff changeset
968 if(calc_nulltime)
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heinrichsweikamp
parents:
diff changeset
969 return CALC_CRITICAL;
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heinrichsweikamp
parents:
diff changeset
970 else
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heinrichsweikamp
parents:
diff changeset
971 return vpm_calc_critcal_volume(true, false);
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heinrichsweikamp
parents:
diff changeset
972 }
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heinrichsweikamp
parents:
diff changeset
973 /* end of critical volume decision */
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heinrichsweikamp
parents:
diff changeset
974 /* L100: */
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heinrichsweikamp
parents:
diff changeset
975 // }/* end of critical vol loop */
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heinrichsweikamp
parents:
diff changeset
976 }
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heinrichsweikamp
parents:
diff changeset
977
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heinrichsweikamp
parents:
diff changeset
978 void vpm_calc_deco_ceiling(void)
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heinrichsweikamp
parents:
diff changeset
979 {
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heinrichsweikamp
parents:
diff changeset
980
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heinrichsweikamp
parents:
diff changeset
981 short i;
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heinrichsweikamp
parents:
diff changeset
982 // hw 1601209 float r1;
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heinrichsweikamp
parents:
diff changeset
983 // hw 1601209 float stop_time;
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heinrichsweikamp
parents:
diff changeset
984 // hw 1601209 int count = 0;
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heinrichsweikamp
parents:
diff changeset
985 //static int dp_max;
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heinrichsweikamp
parents:
diff changeset
986 //static float surfacetime;
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heinrichsweikamp
parents:
diff changeset
987 // _Bool first_stop = false;
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heinrichsweikamp
parents:
diff changeset
988 float tissue_He_saturation[16];
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heinrichsweikamp
parents:
diff changeset
989 float tissue_N2_saturation[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
990 float vpm_buehlmann_safety_gradient = 1.0f - (((float)pDiveSettings->vpm_conservatism) / 40);
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heinrichsweikamp
parents:
diff changeset
991 //max_first_stop_depth = fmaxf(first_stop_depth,max_first_stop_depth);
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heinrichsweikamp
parents:
diff changeset
992
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
993 /** CALC DECO Ceiling ******************************************************************/
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heinrichsweikamp
parents:
diff changeset
994 /** Not when Future stops */
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heinrichsweikamp
parents:
diff changeset
995 if(vpm_calc_what == DECOSTOPS)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
996 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
997
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
998 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
999 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1000 helium_pressure[i - 1] = he_pressure_start_of_deco_zone[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1001 nitrogen_pressure[i - 1] = n2_pressure_start_of_deco_zone[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1002 }
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heinrichsweikamp
parents:
diff changeset
1003 run_time = run_time_start_of_ascent;// run_time_start_of_ascent;
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heinrichsweikamp
parents:
diff changeset
1004 starting_depth = depth_change[0];
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heinrichsweikamp
parents:
diff changeset
1005 mix_number = mix_change[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1006 rate = rate_change[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1007 //gas_loadings_ascent_descen(helium_pressure,nitrogen_pressure, starting_depth, depth_start_of_deco_calc, rate, true);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1008
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heinrichsweikamp
parents:
diff changeset
1009 float deco_ceiling_depth = 0.0f;
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heinrichsweikamp
parents:
diff changeset
1010 if(depth_start_of_deco_calc > max_deco_ceiling_depth)
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heinrichsweikamp
parents:
diff changeset
1011 {
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heinrichsweikamp
parents:
diff changeset
1012 calc_deco_ceiling(&deco_ceiling_depth, true);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1013 }
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heinrichsweikamp
parents:
diff changeset
1014 if(buehlmannSafety)
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heinrichsweikamp
parents:
diff changeset
1015 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1016 for (i = 0; i < 16; i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1017 {
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heinrichsweikamp
parents:
diff changeset
1018 tissue_He_saturation[i] = helium_pressure[i] / 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1019 tissue_N2_saturation[i] = nitrogen_pressure[i] / 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1020 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1021
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heinrichsweikamp
parents:
diff changeset
1022 if(!decom_tissue_test_tolerance(tissue_N2_saturation, tissue_He_saturation, vpm_buehlmann_safety_gradient, (deco_ceiling_depth / 10.0f) + pInput->pressure_surface_bar))
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1023 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1024
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1025 vpm_violates_buehlmann = true;
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heinrichsweikamp
parents:
diff changeset
1026 do {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1027 deco_ceiling_depth += 0.1f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1028 } while (!decom_tissue_test_tolerance(tissue_N2_saturation, tissue_He_saturation, vpm_buehlmann_safety_gradient, (deco_ceiling_depth / 10.0f) + pInput->pressure_surface_bar));
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1029 }
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heinrichsweikamp
parents:
diff changeset
1030 }
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heinrichsweikamp
parents:
diff changeset
1031
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1032 if (deco_ceiling_depth < depth_start_of_deco_calc)
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heinrichsweikamp
parents:
diff changeset
1033 {
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heinrichsweikamp
parents:
diff changeset
1034 projected_ascent(&depth_start_of_deco_calc, &rate, &deco_ceiling_depth, &step_size);
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heinrichsweikamp
parents:
diff changeset
1035 }
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heinrichsweikamp
parents:
diff changeset
1036
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1037 max_deco_ceiling_depth = fmaxf(max_deco_ceiling_depth,deco_ceiling_depth);
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heinrichsweikamp
parents:
diff changeset
1038
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heinrichsweikamp
parents:
diff changeset
1039 if(depth_start_of_deco_calc > deco_ceiling_depth)
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heinrichsweikamp
parents:
diff changeset
1040 {
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heinrichsweikamp
parents:
diff changeset
1041 gas_loadings_ascent_descen(helium_pressure,nitrogen_pressure, depth_start_of_deco_calc,deco_ceiling_depth, rate, true);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1042 //surfacetime += segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1043 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1044
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1045 if(vpm_b)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1046 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1047 BOYLES_LAW_COMPENSATION(&max_deco_ceiling_depth, &deco_ceiling_depth, &step_size);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1048 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1049 calc_deco_ceiling(&deco_ceiling_depth, false);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1050
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1051 // buehlmann safety
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1052 if(vpm_violates_buehlmann)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1053 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1054 for (i = 0; i < 16; i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1055 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1056 tissue_He_saturation[i] = helium_pressure[i] / 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1057 tissue_N2_saturation[i] = nitrogen_pressure[i] / 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1058 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1059
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1060 if(!decom_tissue_test_tolerance(tissue_N2_saturation, tissue_He_saturation, vpm_buehlmann_safety_gradient, (deco_ceiling_depth / 10.0f) + pInput->pressure_surface_bar))
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1061 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1062
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1063 vpm_violates_buehlmann = true;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1064 do {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1065 deco_ceiling_depth += 0.1f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1066 } while (!decom_tissue_test_tolerance(tissue_N2_saturation, tissue_He_saturation, vpm_buehlmann_safety_gradient, (deco_ceiling_depth / 10.0f) + pInput->pressure_surface_bar));
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1067 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1068 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1069 // output_ceiling_meter
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1070 if(deco_ceiling_depth > first_stop_depth)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1071 deco_ceiling_depth = first_stop_depth;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1072 pDecoInfo->output_ceiling_meter = deco_ceiling_depth ;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1073 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1074 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1075 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1076 pDecoInfo->output_ceiling_meter = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1077 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1078
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1079 // fix hw 160627
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1080 if(pDecoInfo->output_ceiling_meter < 0)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1081 pDecoInfo->output_ceiling_meter = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1082
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1083 /*** End CALC ceiling ***************************************************/
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1084 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1085
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1086
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1087 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1088 /* DECO STOP LOOP BLOCK FOR FINAL DECOMPRESSION SCHEDULE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1089 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1090
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1091 int vpm_calc_final_deco(_Bool begin)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1092 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1093 short i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1094 float r1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1095 float stop_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1096 int count = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1097 static int dp_max;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1098 static float surfacetime;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1099 _Bool first_stop = false;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1100 max_first_stop_depth = fmaxf(first_stop_depth,max_first_stop_depth);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1101 if(begin)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1102 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1103 gCNS_VPM = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1104 dp_max = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1105 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1106 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1107 helium_pressure[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1108 he_pressure_start_of_ascent[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1109 nitrogen_pressure[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1110 n2_pressure_start_of_ascent[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1111 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1112 run_time = run_time_start_of_ascent;// run_time_start_of_ascent;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1113 starting_depth = depth_change[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1114 mix_number = mix_change[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1115 rate = rate_change[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1116 step_size = step_size_change[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1117 deco_stop_depth = first_stop_depth;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1118 max_first_stop_depth = fmaxf(first_stop_depth,max_first_stop_depth);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1119 last_run_time = 0.;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1120
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1121
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1122
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1123 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1124 /* DECO STOP LOOP BLOCK FOR FINAL DECOMPRESSION SCHEDULE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1125 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1126 surfacetime = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1127 first_stop = true;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1128 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1129
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1130 while(true) /* loop will run continuous until there is an break statement */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1131 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1132 if(starting_depth > deco_stop_depth)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1133 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1134 gas_loadings_ascent_descen(helium_pressure,nitrogen_pressure, starting_depth,deco_stop_depth, rate, first_stop);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1135 surfacetime += segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1136 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1137
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1138 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1139 /* DURING FINAL DECOMPRESSION SCHEDULE PROCESS, COMPUTE MAXIMUM ACTUAL */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1140 /* SUPERSATURATION GRADIENT RESULTING IN EACH COMPARTMENT */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1141 /* If there is a repetitive dive, this will be used later in the VPM */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1142 /* Repetitive Algorithm to adjust the values for critical radii. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1143 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1144 if(vpm_calc_what == DECOSTOPS)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1145 calc_max_actual_gradient(&deco_stop_depth);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1146
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1147 if (deco_stop_depth <= 0.0f) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1148 break;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1149 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1150 if (number_of_changes > 1)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1151 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1152 int i1 = number_of_changes;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1153 for (i = 2; i <= i1; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1154 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1155 if (depth_change[i - 1] >= deco_stop_depth)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1156 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1157 mix_number = mix_change[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1158 rate = rate_change[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1159 step_size = step_size_change[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1160 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1161 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1162 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1163
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1164 if(first_stop)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1165 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1166 run_time_first_stop = run_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1167 first_stop = false;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1168 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1169 if(vpm_b)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1170 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1171 BOYLES_LAW_COMPENSATION(&max_first_stop_depth, &deco_stop_depth, &step_size);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1172 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1173 decompression_stop(&deco_stop_depth, &step_size, true);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1174
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1175 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1176 /* This next bit justs rounds up the stop time at the first stop to be in */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1177 /* whole increments of the minimum stop time (to make for a nice deco table). */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1178 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1179
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1180 if (last_run_time == 0.0f)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1181 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1182 r1 = segment_time / minimum_deco_stop_time + 0.5f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1183 stop_time = r_int(&r1) * minimum_deco_stop_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1184 } else {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1185 stop_time = run_time - last_run_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1186 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1187 stop_time = segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1188 surfacetime += stop_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1189 if((vpm_calc_what == DECOSTOPS) || (vpm_calc_what == BAILOUTSTOPS))
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1190 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1191 int dp = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1192 if(deco_stop_depth == (float)pDiveSettings->last_stop_depth_bar * 10)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1193 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1194 dp = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1195 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1196 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1197 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1198 dp = 1 + (int)((deco_stop_depth - (pDiveSettings->input_second_to_last_stop_depth_bar * 10)) / step_size);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1199 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1200 dp_max = (int)fmaxf(dp_max,dp);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1201 if(dp < DECOINFO_STRUCT_MAX_STOPS)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1202 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1203 int stop_time_seconds = fminf((999 * 60), (int)(stop_time *60));
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1204 //
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1205
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1206 //if(vpm_calc_what == DECOSTOPS)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1207 pDecoInfo->output_stop_length_seconds[dp] = (unsigned short)stop_time_seconds;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1208 //else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1209 //decostop_bailout[dp] = (unsigned short)stop_time_seconds;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1210 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1211 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1212
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1213
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1214 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1215 /* DURING FINAL DECOMPRESSION SCHEDULE, IF MINIMUM STOP TIME PARAMETER IS A */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1216 /* WHOLE NUMBER (i.e. 1 minute) THEN WRITE DECO SCHEDULE USING short */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1217 /* NUMBERS (looks nicer). OTHERWISE, USE DECIMAL NUMBERS. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1218 /* Note: per the request of a noted exploration diver(!), program now allows */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1219 /* a minimum stop time of less than one minute so that total ascent time can */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1220 /* be minimized on very long dives. In fact, with step size set at 1 fsw or */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1221 /* 0.2 msw and minimum stop time set at 0.1 minute (6 seconds), a near */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1222 /* continuous decompression schedule can be computed. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1223 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1224
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1225 starting_depth = deco_stop_depth;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1226 if(deco_stop_depth == (float)pDiveSettings->last_stop_depth_bar * 10)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1227 deco_stop_depth = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1228 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1229 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1230 deco_stop_depth = deco_stop_depth - step_size;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1231 deco_stop_depth = fmaxf(deco_stop_depth,(float)pDiveSettings->last_stop_depth_bar * 10);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1232 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1233
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1234 last_run_time = run_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1235 count++;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1236 //if(count > 14)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1237 //return CALC_FINAL_DECO2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1238 /* L80: */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1239 } /* for final deco sche */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1240
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1241 if( (vpm_calc_what == DECOSTOPS) || (vpm_calc_what == BAILOUTSTOPS))
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1242 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1243 for(int dp = dp_max +1;dp < DECOINFO_STRUCT_MAX_STOPS;dp++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1244 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1245 //if(vpm_calc_what == DECOSTOPS)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1246 pDecoInfo->output_stop_length_seconds[dp] = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1247 //else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1248 //decostop_bailout[dp] = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1249 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1250 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1251 pDecoInfo->output_time_to_surface_seconds = (int)(surfacetime * 60);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1252 pDecoInfo->output_ndl_seconds = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1253
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1254 vpm_calc_deco_ceiling();
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1255 /* end of deco stop lo */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1256 return CALC_END;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1257 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1258
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1259 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1260 /* SUBROUTINE NUCLEAR_REGENERATION */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1261 /* Purpose: This subprogram calculates the regeneration of VPM critical */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1262 /* radii that takes place over the dive time. The regeneration time constant */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1263 /* has a time scale of weeks so this will have very little impact on dives of */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1264 /* normal length, but will have a major impact for saturation dives. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1265 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1266
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1267 int nuclear_regeneration(float *dive_time)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1268 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1269 /* Local variables */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1270 float crush_pressure_adjust_ratio_he,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1271 ending_radius_n2,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1272 ending_radius_he;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1273 short i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1274 float crushing_pressure_pascals_n2,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1275 crushing_pressure_pascals_he,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1276 adj_crush_pressure_n2_pascals,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1277 adj_crush_pressure_he_pascals,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1278 crush_pressure_adjust_ratio_n2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1279
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1280 /* loop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1281 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1282 /* CALCULATIONS */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1283 /* First convert the maximum crushing pressure obtained for each compartment */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1284 /* to Pascals. Next, compute the ending radius for helium and nitrogen */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1285 /* critical nuclei in each compartment. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1286 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1287
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1288 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1289 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1290 crushing_pressure_pascals_he =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1291 pVpm->max_crushing_pressure_he[i - 1] / UNITS_FACTOR * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1292 crushing_pressure_pascals_n2 =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1293 pVpm->max_crushing_pressure_n2[i - 1] / UNITS_FACTOR * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1294 ending_radius_he =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1295 1.0f / (crushing_pressure_pascals_he /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1296 ((SKIN_COMPRESSION_GAMMAC - SURFACE_TENSION_GAMMA) * 2.0f) +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1297 1.0f / pVpm->adjusted_critical_radius_he[i - 1]);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1298 ending_radius_n2 =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1299 1.0f / (crushing_pressure_pascals_n2 /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1300 ((SKIN_COMPRESSION_GAMMAC - SURFACE_TENSION_GAMMA) * 2.0f) +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1301 1.0f / pVpm->adjusted_critical_radius_n2[i - 1]);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1302
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1303 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1304 /* A "regenerated" radius for each nucleus is now calculated based on the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1305 /* regeneration time constant. This means that after application of */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1306 /* crushing pressure and reduction in radius, a nucleus will slowly grow */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1307 /* back to its original initial radius over a period of time. This */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1308 /* phenomenon is probabilistic in nature and depends on absolute temperature. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1309 /* It is independent of crushing pressure. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1310 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1311
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1312 regenerated_radius_he[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1313 pVpm->adjusted_critical_radius_he[i - 1] +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1314 (ending_radius_he - pVpm->adjusted_critical_radius_he[i - 1]) *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1315 expf(-(*dive_time) / REGENERATION_TIME_CONSTANT);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1316 regenerated_radius_n2[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1317 pVpm->adjusted_critical_radius_n2[i - 1] +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1318 (ending_radius_n2 - pVpm->adjusted_critical_radius_n2[i - 1]) *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1319 expf(-(*dive_time) / REGENERATION_TIME_CONSTANT);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1320
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1321 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1322 /* In order to preserve reference back to the initial critical radii after */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1323 /* regeneration, an "adjusted crushing pressure" for the nuclei in each */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1324 /* compartment must be computed. In other words, this is the value of */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1325 /* crushing pressure that would have reduced the original nucleus to the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1326 /* to the present radius had regeneration not taken place. The ratio */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1327 /* for adjusting crushing pressure is obtained from algebraic manipulation */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1328 /* of the standard VPM equations. The adjusted crushing pressure, in lieu */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1329 /* of the original crushing pressure, is then applied in the VPM Critical */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1330 /* Volume Algorithm and the VPM Repetitive Algorithm. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1331 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1332
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1333 crush_pressure_adjust_ratio_he =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1334 ending_radius_he * (pVpm->adjusted_critical_radius_he[i - 1] -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1335 regenerated_radius_he[i - 1]) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1336 (regenerated_radius_he[i - 1] *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1337 (pVpm->adjusted_critical_radius_he[i - 1] -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1338 ending_radius_he));
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1339 crush_pressure_adjust_ratio_n2 =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1340 ending_radius_n2 * (pVpm->adjusted_critical_radius_n2[i - 1] -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1341 regenerated_radius_n2[i - 1]) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1342 (regenerated_radius_n2[i - 1] *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1343 (pVpm->adjusted_critical_radius_n2[i - 1] -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1344 ending_radius_n2));
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1345 adj_crush_pressure_he_pascals =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1346 crushing_pressure_pascals_he * crush_pressure_adjust_ratio_he;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1347 adj_crush_pressure_n2_pascals =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1348 crushing_pressure_pascals_n2 * crush_pressure_adjust_ratio_n2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1349 pVpm->adjusted_crushing_pressure_he[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1350 adj_crush_pressure_he_pascals / 101325.0f * UNITS_FACTOR;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1351 pVpm->adjusted_crushing_pressure_n2[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1352 adj_crush_pressure_n2_pascals / 101325.0f * UNITS_FACTOR;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1353 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1354 return 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1355 } /* nuclear_regeneration */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1356
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1357 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1358 /* SUBROUTINE CALC_INITIAL_ALLOWABLE_GRADIENT */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1359 /* Purpose: This subprogram calculates the initial allowable gradients for */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1360 /* helium and nitrogren in each compartment. These are the gradients that */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1361 /* will be used to set the deco ceiling on the first pass through the deco */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1362 /* loop. If the Critical Volume Algorithm is set to "off", then these */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1363 /* gradients will determine the final deco schedule. Otherwise, if the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1364 /* Critical Volume Algorithm is set to "on", these gradients will be further */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1365 /* "relaxed" by the Critical Volume Algorithm subroutine. The initial */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1366 /* allowable gradients are referred to as "PssMin" in the papers by Yount */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1367 /* and colleauges, i.e., the minimum supersaturation pressure gradients */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1368 /* that will probe bubble formation in the VPM nuclei that started with the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1369 /* designated minimum initial radius (critical radius). */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1370
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1371 /* The initial allowable gradients are computed directly from the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1372 /* "regenerated" radii after the Nuclear Regeneration subroutine. These */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1373 /* gradients are tracked separately for helium and nitrogen. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1374 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1375
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1376 int calc_initial_allowable_gradient()
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1377 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1378 float initial_allowable_grad_n2_pa,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1379 initial_allowable_grad_he_pa;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1380 short i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1381
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1382 /* loop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1383 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1384 /* CALCULATIONS */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1385 /* The initial allowable gradients are computed in Pascals and then converted */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1386 /* to the diving pressure units. Two different sets of arrays are used to */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1387 /* save the calculations - Initial Allowable Gradients and Allowable */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1388 /* Gradients. The Allowable Gradients are assigned the values from Initial */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1389 /* Allowable Gradients however the Allowable Gradients can be changed later */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1390 /* by the Critical Volume subroutine. The values for the Initial Allowable */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1391 /* Gradients are saved in a global array for later use by both the Critical */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1392 /* Volume subroutine and the VPM Repetitive Algorithm subroutine. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1393 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1394
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1395 for (i = 1; i <= 16; ++i)
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heinrichsweikamp
parents:
diff changeset
1396 {
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heinrichsweikamp
parents:
diff changeset
1397 initial_allowable_grad_n2_pa =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1398 SURFACE_TENSION_GAMMA * 2.0f *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1399 (SKIN_COMPRESSION_GAMMAC - SURFACE_TENSION_GAMMA) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1400 (regenerated_radius_n2[i - 1] * SKIN_COMPRESSION_GAMMAC);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1401
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1402 initial_allowable_grad_he_pa =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1403 SURFACE_TENSION_GAMMA * 2.0f *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1404 (SKIN_COMPRESSION_GAMMAC - SURFACE_TENSION_GAMMA) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1405 (regenerated_radius_he[i - 1] * SKIN_COMPRESSION_GAMMAC);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1406
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1407 pVpm->initial_allowable_gradient_n2[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1408 initial_allowable_grad_n2_pa / 101325.0f * UNITS_FACTOR;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1409
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1410 pVpm->initial_allowable_gradient_he[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1411 initial_allowable_grad_he_pa / 101325.0f * UNITS_FACTOR;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1412
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heinrichsweikamp
parents:
diff changeset
1413 allowable_gradient_he[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1414 pVpm->initial_allowable_gradient_he[i - 1];
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heinrichsweikamp
parents:
diff changeset
1415
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heinrichsweikamp
parents:
diff changeset
1416 allowable_gradient_n2[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1417 pVpm->initial_allowable_gradient_n2[i - 1];
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heinrichsweikamp
parents:
diff changeset
1418 }
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heinrichsweikamp
parents:
diff changeset
1419 return 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1420 } /* calc_initial_allowable_gradient */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1421
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1422 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1423 /* SUBROUTINE CALC_DECO_CEILING */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1424 /* Purpose: This subprogram calculates the deco ceiling (the safe ascent */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1425 /* depth) in each compartment, based on the allowable gradients, and then */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1426 /* finds the deepest deco ceiling across all compartments. This deepest */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1427 /* value (Deco Ceiling Depth) is then used by the Decompression Stop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1428 /* subroutine to determine the actual deco schedule. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1429 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1430
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1431 int calc_deco_ceiling(float *deco_ceiling_depth,_Bool fallowable)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1432 {
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heinrichsweikamp
parents:
diff changeset
1433 /* System generated locals */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1434 float r1, r2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1435 /* Local variables */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1436 float weighted_allowable_gradient;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1437 short i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1438 float compartment_deco_ceiling[16],
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1439 gas_loading,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1440 tolerated_ambient_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1441 float gradient_he, gradient_n2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1442
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heinrichsweikamp
parents:
diff changeset
1443 if(!vpm_b)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1444 fallowable = true;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1445 /* loop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1446 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1447 /* CALCULATIONS */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1448 /* Since there are two sets of allowable gradients being tracked, one for */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1449 /* helium and one for nitrogen, a "weighted allowable gradient" must be */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1450 /* computed each time based on the proportions of helium and nitrogen in */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1451 /* each compartment. This proportioning follows the methodology of */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1452 /* Buhlmann/Keller. If there is no helium and nitrogen in the compartment, */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1453 /* such as after extended periods of oxygen breathing, then the minimum value */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1454 /* across both gases will be used. It is important to note that if a */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1455 /* compartment is empty of helium and nitrogen, then the weighted allowable */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1456 /* gradient formula cannot be used since it will result in division by zero. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1457 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1458
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1459 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1460 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1461
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1462 // abfrage raus und pointer stattdessen
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1463 if(fallowable){
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1464 gradient_he = allowable_gradient_he[i-1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1465 gradient_n2 = allowable_gradient_n2[i-1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1466 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1467 else{
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1468 gradient_he = deco_gradient_he[i-1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1469 gradient_n2 = deco_gradient_n2[i-1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1470 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1471
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heinrichsweikamp
parents:
diff changeset
1472 gas_loading = helium_pressure[i - 1] + nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1473
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1474 if (gas_loading > 0)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1475 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1476 weighted_allowable_gradient =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1477 (gradient_he * helium_pressure[i - 1] +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1478 gradient_n2 * nitrogen_pressure[i - 1]) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1479 (helium_pressure[i - 1] + nitrogen_pressure[i - 1]);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1480
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1481 tolerated_ambient_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1482 gas_loading +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1483 CONSTANT_PRESSURE_OTHER_GASES -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1484 weighted_allowable_gradient;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1485 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1486 else
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heinrichsweikamp
parents:
diff changeset
1487 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1488 /* Computing MIN */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1489 r1 = gradient_he;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1490 r2 = gradient_n2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1491 weighted_allowable_gradient = fminf(r1,r2);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1492
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1493 tolerated_ambient_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1494 CONSTANT_PRESSURE_OTHER_GASES - weighted_allowable_gradient;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1495 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1496
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1497 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1498 /* The tolerated ambient pressure cannot be less than zero absolute, i.e., */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1499 /* the vacuum of outer space! */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1500 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1501
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1502 if (tolerated_ambient_pressure < 0) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1503 tolerated_ambient_pressure = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1504 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1505 compartment_deco_ceiling[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1506 tolerated_ambient_pressure - barometric_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1507 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1508
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1509 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1510 /* The Deco Ceiling Depth is computed in a loop after all of the individual */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1511 /* compartment deco ceilings have been calculated. It is important that the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1512 /* Deco Ceiling Depth (max deco ceiling across all compartments) only be */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1513 /* extracted from the compartment values and not be compared against some */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1514 /* initialization value. For example, if MAX(Deco_Ceiling_Depth . .) was */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1515 /* compared against zero, this could cause a program lockup because sometimes */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1516 /* the Deco Ceiling Depth needs to be negative (but not less than zero */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1517 /* absolute ambient pressure) in order to decompress to the last stop at zero */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1518 /* depth. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1519 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1520
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1521 *deco_ceiling_depth = compartment_deco_ceiling[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1522 for (i = 2; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1523 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1524 /* Computing MAX */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1525 r1 = *deco_ceiling_depth;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1526 r2 = compartment_deco_ceiling[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1527 *deco_ceiling_depth = fmaxf(r1,r2);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1528 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1529 return 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1530 } /* calc_deco_ceiling */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1531
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1532
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1533
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1534 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1535 /* SUBROUTINE CALC_MAX_ACTUAL_GRADIENT */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1536 /* Purpose: This subprogram calculates the actual supersaturation gradient */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1537 /* obtained in each compartment as a result of the ascent profile during */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1538 /* decompression. Similar to the concept with crushing pressure, the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1539 /* supersaturation gradients are not cumulative over a multi-level, staged */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1540 /* ascent. Rather, it will be the maximum value obtained in any one discrete */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1541 /* step of the overall ascent. Thus, the program must compute and store the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1542 /* maximum actual gradient for each compartment that was obtained across all */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1543 /* steps of the ascent profile. This subroutine is invoked on the last pass */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1544 /* through the deco stop loop block when the final deco schedule is being */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1545 /* generated. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1546 /* */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1547 /* The max actual gradients are later used by the VPM Repetitive Algorithm to */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1548 /* determine if adjustments to the critical radii are required. If the max */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1549 /* actual gradient did not exceed the initial alllowable gradient, then no */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1550 /* adjustment will be made. However, if the max actual gradient did exceed */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1551 /* the intitial allowable gradient, such as permitted by the Critical Volume */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1552 /* Algorithm, then the critical radius will be adjusted (made larger) on the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1553 /* repetitive dive to compensate for the bubbling that was allowed on the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1554 /* previous dive. The use of the max actual gradients is intended to prevent */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1555 /* the repetitive algorithm from being overly conservative. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1556 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1557
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1558 int calc_max_actual_gradient(float *deco_stop_depth)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1559 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1560 /* System generated locals */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1561 float r1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1562
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heinrichsweikamp
parents:
diff changeset
1563 /* Local variables */
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heinrichsweikamp
parents:
diff changeset
1564 short i;
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heinrichsweikamp
parents:
diff changeset
1565 float compartment_gradient;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1566
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heinrichsweikamp
parents:
diff changeset
1567 /* loop */
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heinrichsweikamp
parents:
diff changeset
1568 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1569 /* CALCULATIONS */
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heinrichsweikamp
parents:
diff changeset
1570 /* Note: negative supersaturation gradients are meaningless for this */
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heinrichsweikamp
parents:
diff changeset
1571 /* application, so the values must be equal to or greater than zero. */
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heinrichsweikamp
parents:
diff changeset
1572 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1573
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1574 for (i = 1; i <= 16; ++i)
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heinrichsweikamp
parents:
diff changeset
1575 {
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heinrichsweikamp
parents:
diff changeset
1576 compartment_gradient =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1577 helium_pressure[i - 1] +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1578 nitrogen_pressure[i - 1] +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1579 CONSTANT_PRESSURE_OTHER_GASES -
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heinrichsweikamp
parents:
diff changeset
1580 (*deco_stop_depth + barometric_pressure);
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heinrichsweikamp
parents:
diff changeset
1581 if (compartment_gradient <= 0.0f) {
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heinrichsweikamp
parents:
diff changeset
1582 compartment_gradient = 0.0f;
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heinrichsweikamp
parents:
diff changeset
1583 }
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heinrichsweikamp
parents:
diff changeset
1584 /* Computing MAX */
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heinrichsweikamp
parents:
diff changeset
1585 r1 = pVpm->max_actual_gradient[i - 1];
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heinrichsweikamp
parents:
diff changeset
1586 pVpm->max_actual_gradient[i - 1] = fmaxf(r1, compartment_gradient);
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heinrichsweikamp
parents:
diff changeset
1587 }
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heinrichsweikamp
parents:
diff changeset
1588 return 0;
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heinrichsweikamp
parents:
diff changeset
1589 } /* calc_max_actual_gradient */
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heinrichsweikamp
parents:
diff changeset
1590
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heinrichsweikamp
parents:
diff changeset
1591 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
1592 /* SUBROUTINE CALC_SURFACE_PHASE_VOLUME_TIME */
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heinrichsweikamp
parents:
diff changeset
1593 /* Purpose: This subprogram computes the surface portion of the total phase */
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heinrichsweikamp
parents:
diff changeset
1594 /* volume time. This is the time factored out of the integration of */
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heinrichsweikamp
parents:
diff changeset
1595 /* supersaturation gradient x time over the surface interval. The VPM */
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heinrichsweikamp
parents:
diff changeset
1596 /* considers the gradients that allow bubbles to form or to drive bubble */
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heinrichsweikamp
parents:
diff changeset
1597 /* growth both in the water and on the surface after the dive. */
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heinrichsweikamp
parents:
diff changeset
1598
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heinrichsweikamp
parents:
diff changeset
1599 /* This subroutine is a new development to the VPM algorithm in that it */
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heinrichsweikamp
parents:
diff changeset
1600 /* computes the time course of supersaturation gradients on the surface */
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heinrichsweikamp
parents:
diff changeset
1601 /* when both helium and nitrogen are present. Refer to separate write-up */
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heinrichsweikamp
parents:
diff changeset
1602 /* for a more detailed explanation of this algorithm. */
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heinrichsweikamp
parents:
diff changeset
1603 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
1604
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heinrichsweikamp
parents:
diff changeset
1605 int calc_surface_phase_volume_time()
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heinrichsweikamp
parents:
diff changeset
1606 {
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heinrichsweikamp
parents:
diff changeset
1607 /* Local variables */
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heinrichsweikamp
parents:
diff changeset
1608 float decay_time_to_zero_gradient;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1609 short i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1610 float integral_gradient_x_time,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1611 surface_inspired_n2_pressure;
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heinrichsweikamp
parents:
diff changeset
1612
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1613 /* loop */
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heinrichsweikamp
parents:
diff changeset
1614 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1615 /* CALCULATIONS */
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heinrichsweikamp
parents:
diff changeset
1616 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
1617
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heinrichsweikamp
parents:
diff changeset
1618 surface_inspired_n2_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1619 (barometric_pressure - WATER_VAPOR_PRESSURE) * 0.79f;
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heinrichsweikamp
parents:
diff changeset
1620 for (i = 1; i <= 16; ++i)
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heinrichsweikamp
parents:
diff changeset
1621 {
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heinrichsweikamp
parents:
diff changeset
1622 if (nitrogen_pressure[i - 1] > surface_inspired_n2_pressure)
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heinrichsweikamp
parents:
diff changeset
1623 {
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heinrichsweikamp
parents:
diff changeset
1624 surface_phase_volume_time[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1625 (helium_pressure[i - 1] / HELIUM_TIME_CONSTANT[i - 1] +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1626 (nitrogen_pressure[i - 1] - surface_inspired_n2_pressure) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1627 NITROGEN_TIME_CONSTANT[i - 1]) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1628 (helium_pressure[i - 1] + nitrogen_pressure[i - 1] -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1629 surface_inspired_n2_pressure);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1630 } else if (nitrogen_pressure[i - 1] <= surface_inspired_n2_pressure &&
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1631 helium_pressure[i - 1] + nitrogen_pressure[i - 1] >= surface_inspired_n2_pressure)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1632 {
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heinrichsweikamp
parents:
diff changeset
1633 decay_time_to_zero_gradient =
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heinrichsweikamp
parents:
diff changeset
1634 1.0f / (NITROGEN_TIME_CONSTANT[i - 1] - HELIUM_TIME_CONSTANT[i - 1]) *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1635 log((surface_inspired_n2_pressure - nitrogen_pressure[i - 1]) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1636 helium_pressure[i - 1]);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1637 integral_gradient_x_time =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1638 helium_pressure[i - 1] /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1639 HELIUM_TIME_CONSTANT[i - 1] *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1640 (1.0f - expf(-HELIUM_TIME_CONSTANT[i - 1] *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1641 decay_time_to_zero_gradient)) +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1642 (nitrogen_pressure[i - 1] - surface_inspired_n2_pressure) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1643 NITROGEN_TIME_CONSTANT[i - 1] *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1644 (1.0f - expf(-NITROGEN_TIME_CONSTANT[i - 1] *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1645 decay_time_to_zero_gradient));
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1646 surface_phase_volume_time[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1647 integral_gradient_x_time /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1648 (helium_pressure[i - 1] +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1649 nitrogen_pressure[i - 1] -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1650 surface_inspired_n2_pressure);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1651 } else {
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heinrichsweikamp
parents:
diff changeset
1652 surface_phase_volume_time[i - 1] = 0.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1653 }
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heinrichsweikamp
parents:
diff changeset
1654 }
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heinrichsweikamp
parents:
diff changeset
1655 return 0;
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heinrichsweikamp
parents:
diff changeset
1656 } /* calc_surface_phase_volume_time */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1657
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heinrichsweikamp
parents:
diff changeset
1658 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
1659 /* SUBROUTINE CRITICAL_VOLUME */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1660 /* Purpose: This subprogram applies the VPM Critical Volume Algorithm. This */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1661 /* algorithm will compute "relaxed" gradients for helium and nitrogen based */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1662 /* on the setting of the Critical Volume Parameter Lambda. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1663 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1664
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1665 int critical_volume(float *deco_phase_volume_time)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1666 {
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heinrichsweikamp
parents:
diff changeset
1667 /* System generated locals */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1668 float r1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1669
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1670 /* Local variables */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1671 float initial_allowable_grad_n2_pa,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1672 initial_allowable_grad_he_pa,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1673 parameter_lambda_pascals, b,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1674 c;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1675 short i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1676 float new_allowable_grad_n2_pascals,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1677 phase_volume_time[16],
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1678 new_allowable_grad_he_pascals,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1679 adj_crush_pressure_n2_pascals,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1680 adj_crush_pressure_he_pascals;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1681
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1682 /* loop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1683 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1684 /* CALCULATIONS */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1685 /* Note: Since the Critical Volume Parameter Lambda was defined in units of */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1686 /* fsw-min in the original papers by Yount and colleauges, the same */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1687 /* convention is retained here. Although Lambda is adjustable only in units */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1688 /* of fsw-min in the program settings (range from 6500 to 8300 with default */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1689 /* 7500), it will convert to the proper value in Pascals-min in this */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1690 /* subroutine regardless of which diving pressure units are being used in */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1691 /* the main program - feet of seawater (fsw) or meters of seawater (msw). */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1692 /* The allowable gradient is computed using the quadratic formula (refer to */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1693 /* separate write-up posted on the Deco List web site). */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1694 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1695
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1696 /**
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1697 ******************************************************************************
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heinrichsweikamp
parents:
diff changeset
1698 * @brief critical_volume comment by hw
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1699 * @version V0.0.1
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1700 * @date 19-April-2014
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1701 * @retval global: allowable_gradient_he[i], allowable_gradient_n2[i]
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1702 ******************************************************************************
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heinrichsweikamp
parents:
diff changeset
1703 */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1704
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1705 parameter_lambda_pascals =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1706 CRIT_VOLUME_PARAMETER_LAMBDA / 33.0f * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1707 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1708 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1709 phase_volume_time[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1710 *deco_phase_volume_time + surface_phase_volume_time[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1711 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1712 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1713 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1714
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1715 adj_crush_pressure_he_pascals =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1716 pVpm->adjusted_crushing_pressure_he[i - 1] / UNITS_FACTOR * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1717
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1718 initial_allowable_grad_he_pa =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1719 pVpm->initial_allowable_gradient_he[i - 1] / UNITS_FACTOR * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1720
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1721 b = initial_allowable_grad_he_pa + parameter_lambda_pascals *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1722 SURFACE_TENSION_GAMMA / (
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1723 SKIN_COMPRESSION_GAMMAC * phase_volume_time[i - 1]);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1724
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1725 c = SURFACE_TENSION_GAMMA * (
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1726 SURFACE_TENSION_GAMMA * (
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1727 parameter_lambda_pascals * adj_crush_pressure_he_pascals)) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1728 (SKIN_COMPRESSION_GAMMAC *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1729 (SKIN_COMPRESSION_GAMMAC * phase_volume_time[i - 1]));
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1730 /* Computing 2nd power */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1731
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1732 r1 = b;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1733
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1734 new_allowable_grad_he_pascals =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1735 (b + sqrtf(r1 * r1 - c * 4.0f)) / 2.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1736
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1737 /* modify global variable */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1738 allowable_gradient_he[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1739 new_allowable_grad_he_pascals / 101325.0f * UNITS_FACTOR;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1740 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1741
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1742 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1743 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1744 adj_crush_pressure_n2_pascals =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1745 pVpm->adjusted_crushing_pressure_n2[i - 1] / UNITS_FACTOR * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1746
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1747 initial_allowable_grad_n2_pa =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1748 pVpm->initial_allowable_gradient_n2[i - 1] / UNITS_FACTOR * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1749
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1750 b = initial_allowable_grad_n2_pa + parameter_lambda_pascals *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1751 SURFACE_TENSION_GAMMA / (
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1752 SKIN_COMPRESSION_GAMMAC * phase_volume_time[i - 1]);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1753
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1754 c = SURFACE_TENSION_GAMMA *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1755 (SURFACE_TENSION_GAMMA *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1756 (parameter_lambda_pascals * adj_crush_pressure_n2_pascals)) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1757 (SKIN_COMPRESSION_GAMMAC *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1758 (SKIN_COMPRESSION_GAMMAC * phase_volume_time[i - 1]));
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1759 /* Computing 2nd power */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1760
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1761 r1 = b;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1762
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1763 new_allowable_grad_n2_pascals =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1764 (b + sqrtf(r1 * r1 - c * 4.0f)) / 2.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1765
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1766 /* modify global variable */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1767 allowable_gradient_n2[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1768 new_allowable_grad_n2_pascals / 101325.0f * UNITS_FACTOR;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1769 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1770 return 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1771 } /* critical_volume */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1772
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1773 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1774 /* SUBROUTINE CALC_START_OF_DECO_ZONE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1775 /* Purpose: This subroutine uses the Bisection Method to find the depth at */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1776 /* which the leading compartment just enters the decompression zone. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1777 /* Source: "Numerical Recipes in Fortran 77", Cambridge University Press, */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1778 /* 1992. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1779 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1780
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1781 int calc_start_of_deco_zone(float *starting_depth,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1782 float *rate,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1783 float *depth_start_of_deco_zone)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1784 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1785 /* Local variables */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1786 float last_diff_change,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1787 initial_helium_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1788 mid_range_nitrogen_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1789 short i, j;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1790 float initial_inspired_n2_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1791 cpt_depth_start_of_deco_zone,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1792 low_bound,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1793 initial_inspired_he_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1794 high_bound_nitrogen_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1795 nitrogen_rate,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1796 function_at_mid_range,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1797 function_at_low_bound,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1798 high_bound,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1799 mid_range_helium_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1800 mid_range_time,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1801 starting_ambient_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1802 initial_nitrogen_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1803 function_at_high_bound;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1804
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1805 float time_to_start_of_deco_zone,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1806 high_bound_helium_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1807 helium_rate,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1808 differential_change;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1809 float fraction_helium_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1810 float fraction_helium_end;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1811 float fraction_nitrogen_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1812 float fraction_nitrogen_end;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1813 float ending_ambient_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1814 float time_test;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1815
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1816
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1817 /* loop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1818 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1819 /* CALCULATIONS */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1820 /* First initialize some variables */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1821 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1822
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1823 *depth_start_of_deco_zone = 0.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1824 starting_ambient_pressure = *starting_depth + barometric_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1825
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1826 //>>>>>>>>>>>>>>>>>>>>
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1827 //Test depth to calculate helium_rate and nitrogen_rate
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1828 ending_ambient_pressure = starting_ambient_pressure/2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1829
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1830 time_test = (ending_ambient_pressure - starting_ambient_pressure) / *rate;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1831 decom_get_inert_gases(starting_ambient_pressure / 10, (&pDiveSettings->decogaslist[mix_number]), &fraction_nitrogen_begin, &fraction_helium_begin );
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1832 decom_get_inert_gases(ending_ambient_pressure / 10, (&pDiveSettings->decogaslist[mix_number]), &fraction_nitrogen_end, &fraction_helium_end );
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1833 initial_inspired_he_pressure = (starting_ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_helium_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1834 initial_inspired_n2_pressure = (starting_ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_nitrogen_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1835 helium_rate = ((ending_ambient_pressure - WATER_VAPOR_PRESSURE)* fraction_helium_end - initial_inspired_he_pressure)/time_test;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1836 nitrogen_rate = ((ending_ambient_pressure - WATER_VAPOR_PRESSURE)* fraction_nitrogen_end - initial_inspired_n2_pressure)/time_test;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1837 //>>>>>>>>>>>>>>>>>>>>>
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1838 /*initial_inspired_he_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1839 (starting_ambient_pressure - water_vapor_pressure) *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1840 fraction_helium[mix_number - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1841 initial_inspired_n2_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1842 (starting_ambient_pressure - water_vapor_pressure) *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1843 fraction_nitrogen[mix_number - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1844 helium_rate = *rate * fraction_helium[mix_number - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1845 nitrogen_rate = *rate * fraction_nitrogen[mix_number - 1];*/
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1846
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1847 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1848 /* ESTABLISH THE BOUNDS FOR THE ROOT SEARCH USING THE BISECTION METHOD */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1849 /* AND CHECK TO MAKE SURE THAT THE ROOT WILL BE WITHIN BOUNDS. PROCESS */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1850 /* EACH COMPARTMENT INDIVIDUALLY AND FIND THE MAXIMUM DEPTH ACROSS ALL */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1851 /* COMPARTMENTS (LEADING COMPARTMENT) */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1852 /* In this case, we are solving for time - the time when the gas tension in */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1853 /* the compartment will be equal to ambient pressure. The low bound for time */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1854 /* is set at zero and the high bound is set at the time it would take to */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1855 /* ascend to zero ambient pressure (absolute). Since the ascent rate is */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1856 /* negative, a multiplier of -1.0 is used to make the time positive. The */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1857 /* desired point when gas tension equals ambient pressure is found at a time */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1858 /* somewhere between these endpoints. The algorithm checks to make sure that */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1859 /* the solution lies in between these bounds by first computing the low bound */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1860 /* and high bound function values. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1861 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1862
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1863 low_bound = 0.;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1864 high_bound = starting_ambient_pressure / *rate * -1.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1865 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1866 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1867 initial_helium_pressure = helium_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1868 initial_nitrogen_pressure = nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1869 function_at_low_bound =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1870 initial_helium_pressure +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1871 initial_nitrogen_pressure +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1872 CONSTANT_PRESSURE_OTHER_GASES -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1873 starting_ambient_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1874 high_bound_helium_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1875 schreiner_equation__2(&initial_inspired_he_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1876 &helium_rate,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1877 &high_bound,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1878 &HELIUM_TIME_CONSTANT[i - 1],
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1879 &initial_helium_pressure);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1880 high_bound_nitrogen_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1881 schreiner_equation__2(&initial_inspired_n2_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1882 &nitrogen_rate,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1883 &high_bound,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1884 &NITROGEN_TIME_CONSTANT[i - 1],
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1885 &initial_nitrogen_pressure);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1886 function_at_high_bound = high_bound_helium_pressure +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1887 high_bound_nitrogen_pressure +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1888 CONSTANT_PRESSURE_OTHER_GASES;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1889 if (function_at_high_bound * function_at_low_bound >= 0.0f)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1890 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1891 printf("\nERROR! ROOT IS NOT WITHIN BRACKETS");
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1892 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1893
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1894 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1895 /* APPLY THE BISECTION METHOD IN SEVERAL ITERATIONS UNTIL A SOLUTION WITH */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1896 /* THE DESIRED ACCURACY IS FOUND */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1897 /* Note: the program allows for up to 100 iterations. Normally an exit will */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1898 /* be made from the loop well before that number. If, for some reason, the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1899 /* program exceeds 100 iterations, there will be a pause to alert the user. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1900 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1901
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1902 if (function_at_low_bound < 0.0f)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1903 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1904 time_to_start_of_deco_zone = low_bound;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1905 differential_change = high_bound - low_bound;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1906 } else {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1907 time_to_start_of_deco_zone = high_bound;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1908 differential_change = low_bound - high_bound;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1909 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1910 for (j = 1; j <= 100; ++j)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1911 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1912 last_diff_change = differential_change;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1913 differential_change = last_diff_change * 0.5f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1914 mid_range_time =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1915 time_to_start_of_deco_zone +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1916 differential_change;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1917 mid_range_helium_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1918 schreiner_equation__2(&initial_inspired_he_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1919 &helium_rate,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1920 &mid_range_time,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1921 &HELIUM_TIME_CONSTANT[i - 1],
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1922 &initial_helium_pressure);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1923 mid_range_nitrogen_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1924 schreiner_equation__2(&initial_inspired_n2_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1925 &nitrogen_rate,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1926 &mid_range_time,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1927 &NITROGEN_TIME_CONSTANT[i - 1],
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1928 &initial_nitrogen_pressure);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1929 function_at_mid_range =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1930 mid_range_helium_pressure +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1931 mid_range_nitrogen_pressure +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1932 CONSTANT_PRESSURE_OTHER_GASES -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1933 (starting_ambient_pressure + *rate * mid_range_time);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1934 if (function_at_mid_range <= 0.0f) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1935 time_to_start_of_deco_zone = mid_range_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1936 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1937 if( fabs(differential_change) < 0.001f
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1938 || function_at_mid_range == 0.0f)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1939 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1940 goto L170;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1941 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1942 /* L150: */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1943 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1944 printf("\nERROR! ROOT SEARCH EXCEEDED MAXIMUM ITERATIONS");
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1945 //pause();
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1946
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1947 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1948 /* When a solution with the desired accuracy is found, the program jumps out */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1949 /* of the loop to Line 170 and assigns the solution value for the individual */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1950 /* compartment. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1951 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1952
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1953 L170:
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1954 cpt_depth_start_of_deco_zone =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1955 starting_ambient_pressure +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1956 *rate * time_to_start_of_deco_zone -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1957 barometric_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1958
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1959 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1960 /* The overall solution will be the compartment with the maximum depth where */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1961 /* gas tension equals ambient pressure (leading compartment). */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1962 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1963
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1964 *depth_start_of_deco_zone =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1965 fmaxf(*depth_start_of_deco_zone, cpt_depth_start_of_deco_zone);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1966 /* L200: */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1967 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1968 return 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1969 } /* calc_start_of_deco_zone */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1970
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1971 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1972 /* SUBROUTINE PROJECTED_ASCENT */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1973 /* Purpose: This subprogram performs a simulated ascent outside of the main */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1974 /* program to ensure that a deco ceiling will not be violated due to unusual */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1975 /* gas loading during ascent (on-gassing). If the deco ceiling is violated, */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1976 /* the stop depth will be adjusted deeper by the step size until a safe */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1977 /* ascent can be made. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1978 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1979
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1980 int projected_ascent(float *starting_depth,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1981 float *rate,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1982 float *deco_stop_depth,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1983 float *step_size)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1984 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1985 /* Local variables */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1986 float weighted_allowable_gradient,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1987 ending_ambient_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1988 temp_gas_loading[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1989 int i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1990 float allowable_gas_loading[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1991 float temp_nitrogen_pressure[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1992 float temp_helium_pressure[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1993 float run_time_save = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1994
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1995 /* loop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1996 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1997 /* CALCULATIONS */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1998 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1999
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2000
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2001 L665:
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2002 ending_ambient_pressure = *deco_stop_depth + barometric_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2003 for (i = 1; i <= 16; ++i) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2004 temp_helium_pressure[i - 1] = helium_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2005 temp_nitrogen_pressure[i - 1] = nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2006 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2007 run_time_save = run_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2008 gas_loadings_ascent_descen(temp_helium_pressure, temp_nitrogen_pressure, *starting_depth,*deco_stop_depth,*rate,true);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2009 run_time = run_time_save;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2010
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2011 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2012 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2013 temp_gas_loading[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2014 temp_helium_pressure[i - 1] +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2015 temp_nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2016 if (temp_gas_loading[i - 1] > 0.0f)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2017 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2018 weighted_allowable_gradient =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2019 (allowable_gradient_he[i - 1] *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2020 temp_helium_pressure[i - 1] +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2021 allowable_gradient_n2[i - 1] *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2022 temp_nitrogen_pressure[i - 1]) / temp_gas_loading[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2023 } else {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2024 /* Computing MIN */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2025 weighted_allowable_gradient = fminf(allowable_gradient_he[i - 1],allowable_gradient_n2[i - 1]);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2026 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2027 allowable_gas_loading[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2028 ending_ambient_pressure +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2029 weighted_allowable_gradient -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2030 CONSTANT_PRESSURE_OTHER_GASES;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2031 /* L670: */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2032 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2033 for (i = 1; i <= 16; ++i) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2034 if (temp_gas_loading[i - 1] > allowable_gas_loading[i - 1]) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2035 *deco_stop_depth += *step_size;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2036 goto L665;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2037 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2038 /* L671: */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2039 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2040 return 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2041 } /* projected_ascent */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2042
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2043 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2044 /* SUBROUTINE DECOMPRESSION_STOP */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2045 /* Purpose: This subprogram calculates the required time at each */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2046 /* decompression stop. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2047 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2048
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2049 void decompression_stop(float *deco_stop_depth,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2050 float *step_size,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2051 _Bool final_deco_calculation)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2052 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2053 /* Local variables */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2054 float inspired_nitrogen_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2055 // short last_segment_number;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2056 // float weighted_allowable_gradient;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2057 float initial_helium_pressure[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2058 /* by hw */
51
8f8ea3a32e82 Resolved warnings pointing to possible invalid memory access
Ideenmodellierer
parents: 38
diff changeset
2059 float initial_CNS = gCNS_VPM;
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2060
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2061 //static float time_counter;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2062 short i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2063 float ambient_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2064 float inspired_helium_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2065 next_stop;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2066 //last_run_time,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2067 //temp_segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2068
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2069 float deco_ceiling_depth,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2070 initial_nitrogen_pressure[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2071 //round_up_operation;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2072 float fraction_helium_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2073 float fraction_nitrogen_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2074 int count = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2075 _Bool buehlmann_wait = false;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2076 float tissue_He_saturation[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2077 float tissue_N2_saturation[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2078 float vpm_buehlmann_safety_gradient = 1.0f - (((float)pDiveSettings->vpm_conservatism) / 40);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2079 /* loop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2080 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2081 /* CALCULATIONS */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2082 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2083
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2084 segment_time = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2085 // temp_segment_time = segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2086 ambient_pressure = *deco_stop_depth + barometric_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2087 //ending_ambient_pressure = ambient_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2088 decom_get_inert_gases(ambient_pressure / 10, (&pDiveSettings->decogaslist[mix_number]), &fraction_nitrogen_begin, &fraction_helium_begin );
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2089
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2090 if(*deco_stop_depth == (float)(pDiveSettings->last_stop_depth_bar * 10))
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2091 next_stop = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2092 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2093 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2094 next_stop = *deco_stop_depth - *step_size;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2095 next_stop = fmaxf(next_stop,(float)pDiveSettings->last_stop_depth_bar * 10);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2096 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2097
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2098 inspired_helium_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2099 (ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_helium_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2100 inspired_nitrogen_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2101 (ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_nitrogen_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2102
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2103 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2104 /* Check to make sure that program won't lock up if unable to decompress */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2105 /* to the next stop. If so, write error message and terminate program. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2106 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2107
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2108 //deco_ceiling_depth = next_stop +1; //deco_ceiling_depth = next_stop + 1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2109 if(!vpm_violates_buehlmann)
149
e1d66bc78f9a Eliminate warnings
Ideenmodellierer
parents: 51
diff changeset
2110 {
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2111 calc_deco_ceiling(&deco_ceiling_depth, false); //weg, weil auf jeden Fall schleife für safety und so konservativer
149
e1d66bc78f9a Eliminate warnings
Ideenmodellierer
parents: 51
diff changeset
2112 }
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2113 else
149
e1d66bc78f9a Eliminate warnings
Ideenmodellierer
parents: 51
diff changeset
2114 {
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2115 deco_ceiling_depth = next_stop + 1;
149
e1d66bc78f9a Eliminate warnings
Ideenmodellierer
parents: 51
diff changeset
2116 }
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2117 if(deco_ceiling_depth > next_stop)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2118 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2119 while (deco_ceiling_depth > next_stop)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2120 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2121
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2122 segment_time += 60;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2123 if(segment_time >= 999 )
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2124 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2125 segment_time = 999 ;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2126 run_time += segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2127 return;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2128 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2129 //goto L700;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2130 initial_CNS = gCNS_VPM;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2131 decom_oxygen_calculate_cns_exposure(60*60,&pDiveSettings->decogaslist[mix_number],ambient_pressure/10,&gCNS_VPM);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2132 for (i = 0; i < 16; i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2133 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2134 initial_helium_pressure[i] = helium_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2135 initial_nitrogen_pressure[i] = nitrogen_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2136 helium_pressure[i] += (inspired_helium_pressure - helium_pressure[i]) * float_buehlmann_He_factor_expositon_one_hour[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2137 nitrogen_pressure[i] += (inspired_nitrogen_pressure - nitrogen_pressure[i]) * float_buehlmann_N2_factor_expositon_one_hour[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2138 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2139 calc_deco_ceiling(&deco_ceiling_depth, false);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2140 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2141 if(deco_ceiling_depth < next_stop)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2142 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2143 segment_time -= 60;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2144 gCNS_VPM = initial_CNS;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2145 for (i = 0; i < 16; i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2146 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2147 helium_pressure[i] = initial_helium_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2148 nitrogen_pressure[i] = initial_nitrogen_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2149 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2150 deco_ceiling_depth = next_stop +1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2151 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2152 count = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2153 while (deco_ceiling_depth > next_stop && count < 13)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2154 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2155 count++;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2156 segment_time += 5;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2157 //goto L700;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2158 initial_CNS = gCNS_VPM;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2159 decom_oxygen_calculate_cns_exposure(60*5,&pDiveSettings->decogaslist[mix_number],ambient_pressure/10,&gCNS_VPM);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2160 for (i = 0; i < 16; i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2161 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2162 initial_helium_pressure[i] = helium_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2163 initial_nitrogen_pressure[i] = nitrogen_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2164 helium_pressure[i] += (inspired_helium_pressure - helium_pressure[i]) * float_buehlmann_He_factor_expositon_five_minutes[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2165 nitrogen_pressure[i] += (inspired_nitrogen_pressure - nitrogen_pressure[i]) * float_buehlmann_N2_factor_expositon_five_minutes[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2166 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2167 calc_deco_ceiling(&deco_ceiling_depth, false);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2168 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2169 if(deco_ceiling_depth < next_stop)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2170 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2171 segment_time -= 5;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2172 gCNS_VPM = initial_CNS;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2173 for (i = 0; i < 16; i++) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2174 helium_pressure[i] = initial_helium_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2175 nitrogen_pressure[i] = initial_nitrogen_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2176 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2177 deco_ceiling_depth = next_stop +1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2178 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2179 buehlmann_wait = false;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2180 while (buehlmann_wait || (deco_ceiling_depth > next_stop))
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2181 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2182 //time_counter = temp_segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2183 segment_time += 1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2184
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2185 if(segment_time >= 999 )
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2186 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2187 segment_time = 999 ;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2188 run_time += segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2189 return;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2190 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2191 //goto L700;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2192 initial_CNS = gCNS_VPM;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2193 decom_oxygen_calculate_cns_exposure(60*1,&pDiveSettings->decogaslist[mix_number],ambient_pressure/10,&gCNS_VPM);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2194 for (i = 0; i < 16; i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2195 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2196 initial_helium_pressure[i] = helium_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2197 initial_nitrogen_pressure[i] = nitrogen_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2198 helium_pressure[i] += (inspired_helium_pressure - helium_pressure[i]) * float_buehlmann_He_factor_expositon_one_minute[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2199 nitrogen_pressure[i] += (inspired_nitrogen_pressure - nitrogen_pressure[i]) * float_buehlmann_N2_factor_expositon_one_minute[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2200 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2201 if(!buehlmann_wait)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2202 calc_deco_ceiling(&deco_ceiling_depth, false);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2203
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2204 if(buehlmannSafety && final_deco_calculation && !(deco_ceiling_depth > next_stop))
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2205 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2206 for (i = 0; i < 16; i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2207 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2208 tissue_He_saturation[i] = helium_pressure[i] / 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2209 tissue_N2_saturation[i] = nitrogen_pressure[i] / 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2210 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2211 if( (fabsf(nitrogen_pressure[15] - inspired_nitrogen_pressure) < 0.00001f) && (fabsf(helium_pressure[15] - inspired_helium_pressure) < 0.00001f)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2212 && (fabsf(nitrogen_pressure[0] - inspired_nitrogen_pressure) < 0.00001f) && (fabsf(helium_pressure[0] - inspired_helium_pressure) < 0.00001f))
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2213 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2214 buehlmann_wait_exceeded = true;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2215 break;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2216 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2217
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2218 if(decom_tissue_test_tolerance(tissue_N2_saturation, tissue_He_saturation, vpm_buehlmann_safety_gradient, (next_stop / 10.0f) + pInput->pressure_surface_bar))
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2219 break;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2220
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2221 buehlmann_wait = true;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2222 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2223 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2224 if(buehlmann_wait)
149
e1d66bc78f9a Eliminate warnings
Ideenmodellierer
parents: 51
diff changeset
2225 {
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2226 vpm_violates_buehlmann = true;
149
e1d66bc78f9a Eliminate warnings
Ideenmodellierer
parents: 51
diff changeset
2227 }
e1d66bc78f9a Eliminate warnings
Ideenmodellierer
parents: 51
diff changeset
2228 if(!buehlmann_wait)
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2229 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2230 if(deco_ceiling_depth < next_stop)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2231 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2232 segment_time -= 1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2233 gCNS_VPM = initial_CNS;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2234 for (i = 0; i < 16; i++) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2235 helium_pressure[i] = initial_helium_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2236 nitrogen_pressure[i] = initial_nitrogen_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2237 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2238 deco_ceiling_depth = next_stop +1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2239 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2240 while (deco_ceiling_depth > next_stop)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2241 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2242 //time_counter = temp_segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2243 segment_time += (float) 1.0f / 3.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2244 //goto L700;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2245 initial_CNS = gCNS_VPM;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2246 decom_oxygen_calculate_cns_exposure(20,&pDiveSettings->decogaslist[mix_number],ambient_pressure/10,&gCNS_VPM);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2247 for (i = 0; i < 16; i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2248 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2249 helium_pressure[i] += (inspired_helium_pressure - helium_pressure[i]) * float_buehlmann_He_factor_expositon_20_seconds[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2250 nitrogen_pressure[i] += (inspired_nitrogen_pressure - nitrogen_pressure[i]) * float_buehlmann_N2_factor_expositon_20_seconds[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2251 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2252 calc_deco_ceiling(&deco_ceiling_depth, false);
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heinrichsweikamp
parents:
diff changeset
2253 }
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heinrichsweikamp
parents:
diff changeset
2254 }
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heinrichsweikamp
parents:
diff changeset
2255 }
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heinrichsweikamp
parents:
diff changeset
2256
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heinrichsweikamp
parents:
diff changeset
2257 /*float pressure_save =dive_data.pressure;
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heinrichsweikamp
parents:
diff changeset
2258 dive_data.pressure = ambient_pressure/10;
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heinrichsweikamp
parents:
diff changeset
2259 tissues_exposure_stage(st_deco_test,(int)(segment_time * 60), &dive_data, &gaslist);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2260 dive_data.pressure = pressure_save;*/
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heinrichsweikamp
parents:
diff changeset
2261 run_time += segment_time;
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heinrichsweikamp
parents:
diff changeset
2262 return;
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heinrichsweikamp
parents:
diff changeset
2263 } /* decompression_stop */
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heinrichsweikamp
parents:
diff changeset
2264
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heinrichsweikamp
parents:
diff changeset
2265 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
2266 // SUROUTINE BOYLES_LAW_COMPENSATION
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heinrichsweikamp
parents:
diff changeset
2267 // Purpose: This subprogram calculates the reduction in allowable gradients
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heinrichsweikamp
parents:
diff changeset
2268 // with decreasing ambient pressure during the decompression profile based
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heinrichsweikamp
parents:
diff changeset
2269 // on Boyle's Law considerations.
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heinrichsweikamp
parents:
diff changeset
2270 //===============================================================================
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heinrichsweikamp
parents:
diff changeset
2271 void BOYLES_LAW_COMPENSATION (float* First_Stop_Depth,
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heinrichsweikamp
parents:
diff changeset
2272 float* Deco_Stop_Depth,
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heinrichsweikamp
parents:
diff changeset
2273 float* Step_Size)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2274 {
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heinrichsweikamp
parents:
diff changeset
2275 short i;
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heinrichsweikamp
parents:
diff changeset
2276
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heinrichsweikamp
parents:
diff changeset
2277 float Next_Stop;
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heinrichsweikamp
parents:
diff changeset
2278 float Ambient_Pressure_First_Stop, Ambient_Pressure_Next_Stop;
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heinrichsweikamp
parents:
diff changeset
2279 float Amb_Press_First_Stop_Pascals, Amb_Press_Next_Stop_Pascals;
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heinrichsweikamp
parents:
diff changeset
2280 float A, B, C, Low_Bound, High_Bound, Ending_Radius;
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heinrichsweikamp
parents:
diff changeset
2281 float Deco_Gradient_Pascals;
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heinrichsweikamp
parents:
diff changeset
2282 float Allow_Grad_First_Stop_He_Pa, Radius_First_Stop_He;
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heinrichsweikamp
parents:
diff changeset
2283 float Allow_Grad_First_Stop_N2_Pa, Radius_First_Stop_N2;
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heinrichsweikamp
parents:
diff changeset
2284
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heinrichsweikamp
parents:
diff changeset
2285 //===============================================================================
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heinrichsweikamp
parents:
diff changeset
2286 // LO//AL ARRAYS
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heinrichsweikamp
parents:
diff changeset
2287 //===============================================================================
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heinrichsweikamp
parents:
diff changeset
2288 // float Radius1_He[16], Radius2_He[16];
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heinrichsweikamp
parents:
diff changeset
2289 // float Radius1_N2[16], Radius2_N2[16];
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heinrichsweikamp
parents:
diff changeset
2290 float root_factor;
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heinrichsweikamp
parents:
diff changeset
2291
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heinrichsweikamp
parents:
diff changeset
2292 //===============================================================================
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heinrichsweikamp
parents:
diff changeset
2293 // CALCULATIONS
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heinrichsweikamp
parents:
diff changeset
2294 //===============================================================================
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heinrichsweikamp
parents:
diff changeset
2295 Next_Stop = *Deco_Stop_Depth - *Step_Size;
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heinrichsweikamp
parents:
diff changeset
2296
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heinrichsweikamp
parents:
diff changeset
2297 Ambient_Pressure_First_Stop = *First_Stop_Depth +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2298 barometric_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2299
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heinrichsweikamp
parents:
diff changeset
2300 Ambient_Pressure_Next_Stop = Next_Stop + barometric_pressure;
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heinrichsweikamp
parents:
diff changeset
2301
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heinrichsweikamp
parents:
diff changeset
2302 Amb_Press_First_Stop_Pascals = (Ambient_Pressure_First_Stop/UNITS_FACTOR) * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2303
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heinrichsweikamp
parents:
diff changeset
2304 Amb_Press_Next_Stop_Pascals =
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heinrichsweikamp
parents:
diff changeset
2305 (Ambient_Pressure_Next_Stop/UNITS_FACTOR) * 101325.0f;
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heinrichsweikamp
parents:
diff changeset
2306 root_factor = powf(Amb_Press_First_Stop_Pascals/Amb_Press_Next_Stop_Pascals,1.0f / 3.0f);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2307
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heinrichsweikamp
parents:
diff changeset
2308 for( i = 0; i < 16;i++)
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heinrichsweikamp
parents:
diff changeset
2309 {
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heinrichsweikamp
parents:
diff changeset
2310 Allow_Grad_First_Stop_He_Pa =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2311 (allowable_gradient_he[i]/UNITS_FACTOR) * 101325.0f;
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heinrichsweikamp
parents:
diff changeset
2312
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heinrichsweikamp
parents:
diff changeset
2313 Radius_First_Stop_He = (2.0f * SURFACE_TENSION_GAMMA) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2314 Allow_Grad_First_Stop_He_Pa;
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heinrichsweikamp
parents:
diff changeset
2315
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heinrichsweikamp
parents:
diff changeset
2316 // Radius1_He[i] = Radius_First_Stop_He;
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heinrichsweikamp
parents:
diff changeset
2317 A = Amb_Press_Next_Stop_Pascals;
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heinrichsweikamp
parents:
diff changeset
2318 B = -2.0f * SURFACE_TENSION_GAMMA;
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heinrichsweikamp
parents:
diff changeset
2319 C = (Amb_Press_First_Stop_Pascals + (2.0f * SURFACE_TENSION_GAMMA)/
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2320 Radius_First_Stop_He)* Radius_First_Stop_He*
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2321 (Radius_First_Stop_He*(Radius_First_Stop_He));
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2322 Low_Bound = Radius_First_Stop_He;
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heinrichsweikamp
parents:
diff changeset
2323 High_Bound = Radius_First_Stop_He * root_factor;
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heinrichsweikamp
parents:
diff changeset
2324 //*pow(Amb_Press_First_Stop_Pascals/Amb_Press_Next_Stop_Pascals,1.0/3.0);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2325 //*(Amb_Press_First_Stop_Pascals/Amb_Press_Next_Stop_Pascals)**(1.0/3.0);
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heinrichsweikamp
parents:
diff changeset
2326
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heinrichsweikamp
parents:
diff changeset
2327 radius_root_finder(&A,&B,&C, &Low_Bound, &High_Bound,
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heinrichsweikamp
parents:
diff changeset
2328 &Ending_Radius);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2329
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heinrichsweikamp
parents:
diff changeset
2330 // Radius2_He[i] = Ending_Radius;
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heinrichsweikamp
parents:
diff changeset
2331 Deco_Gradient_Pascals = (2.0f * SURFACE_TENSION_GAMMA) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2332 Ending_Radius;
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heinrichsweikamp
parents:
diff changeset
2333
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heinrichsweikamp
parents:
diff changeset
2334 deco_gradient_he[i] = (Deco_Gradient_Pascals / 101325.0f)*
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2335 UNITS_FACTOR;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2336
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2337 }
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heinrichsweikamp
parents:
diff changeset
2338
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2339 for( i = 0; i < 16;i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2340 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2341 Allow_Grad_First_Stop_N2_Pa =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2342 (allowable_gradient_n2[i]/UNITS_FACTOR) * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2343
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2344 Radius_First_Stop_N2 = (2.0f * SURFACE_TENSION_GAMMA) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2345 Allow_Grad_First_Stop_N2_Pa;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2346
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2347 // Radius1_N2[i] = Radius_First_Stop_N2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2348 A = Amb_Press_Next_Stop_Pascals;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2349 B = -2.0f * SURFACE_TENSION_GAMMA;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2350 C = (Amb_Press_First_Stop_Pascals + (2.0f * SURFACE_TENSION_GAMMA)/
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2351 Radius_First_Stop_N2)* Radius_First_Stop_N2*
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2352 (Radius_First_Stop_N2*(Radius_First_Stop_N2));
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2353 Low_Bound = Radius_First_Stop_N2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2354 High_Bound = Radius_First_Stop_N2* root_factor;//pow(Amb_Press_First_Stop_Pascals/Amb_Press_Next_Stop_Pascals,1.0/3.0);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2355
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heinrichsweikamp
parents:
diff changeset
2356 //High_Bound = Radius_First_Stop_N2*exp(log(Amb_Press_First_Stop_Pascals/Amb_Press_Next_Stop_Pascals)/3);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2357 radius_root_finder(&A,&B,&C, &Low_Bound, &High_Bound,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2358 &Ending_Radius);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2359
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2360 // Radius2_N2[i] = Ending_Radius;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2361 Deco_Gradient_Pascals = (2.0f * SURFACE_TENSION_GAMMA) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2362 Ending_Radius;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2363
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2364 deco_gradient_n2[i] = (Deco_Gradient_Pascals / 101325.0f)*
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2365 UNITS_FACTOR;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2366 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2367 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2368
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2369 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2370 // vpm_calc_nullzeit
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2371 // Purpose: This function calcs zero time (time where no decostops are needed)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2372 //===============================================================================
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2373 int vpm_calc_nullzeit(void)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2374 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2375 static float future_helium_pressure[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2376 static float future_nitrogen_pressure[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2377 static int temp_segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2378 static int mix_number;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2379 static float inspired_helium_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2380 static float inspired_nitrogen_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2381
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2382 float previous_helium_pressure[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2383 float previous_nitrogen_pressure[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2384 float ambient_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2385 float fraction_helium_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2386 float fraction_nitrogen_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2387 int i = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2388 int count = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2389 int status = CALC_END;
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heinrichsweikamp
parents:
diff changeset
2390 //if(begin)
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heinrichsweikamp
parents:
diff changeset
2391 //{
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heinrichsweikamp
parents:
diff changeset
2392 for(i = 0; i < 16;i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2393 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2394 future_helium_pressure[i] = pInput->tissue_helium_bar[i] * 10;//tissue_He_saturation[st_dive][i] * 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2395 future_nitrogen_pressure[i] = pInput->tissue_nitrogen_bar[i] * 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2396 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2397 temp_segment_time = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2398
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2399 mix_number = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2400 ambient_pressure = pInput->pressure_ambient_bar * 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2401 // fraction_helium_begin;
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heinrichsweikamp
parents:
diff changeset
2402 // fraction_nitrogen_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2403 decom_get_inert_gases( ambient_pressure / 10, (&pDiveSettings->decogaslist[mix_number]) , &fraction_nitrogen_begin, &fraction_helium_begin );
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2404 inspired_helium_pressure =(ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_helium_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2405 inspired_nitrogen_pressure =(ambient_pressure - WATER_VAPOR_PRESSURE) *fraction_nitrogen_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2406
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heinrichsweikamp
parents:
diff changeset
2407 //if(!nullzeit_unter60)
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heinrichsweikamp
parents:
diff changeset
2408 //{
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heinrichsweikamp
parents:
diff changeset
2409 status = CALC_END;
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heinrichsweikamp
parents:
diff changeset
2410 while (status == CALC_END)
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heinrichsweikamp
parents:
diff changeset
2411 {
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heinrichsweikamp
parents:
diff changeset
2412 count++;
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heinrichsweikamp
parents:
diff changeset
2413 //if(count == 7)
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heinrichsweikamp
parents:
diff changeset
2414 //return CALC_NULLZEIT2;
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heinrichsweikamp
parents:
diff changeset
2415 temp_segment_time += 60;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2416 if(temp_segment_time >= 300)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2417 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2418 pDecoInfo->output_ndl_seconds = temp_segment_time * 60;
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heinrichsweikamp
parents:
diff changeset
2419 return CALC_NULLZEIT;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2420 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2421 run_time += 60;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2422 //goto L700;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2423 for (i = 1; i <= 16; ++i) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2424 previous_helium_pressure[i-1] = future_helium_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2425 previous_nitrogen_pressure[i - 1] = future_nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2426 future_helium_pressure[i - 1] = future_helium_pressure[i - 1] + (inspired_helium_pressure - future_helium_pressure[i - 1]) * float_buehlmann_He_factor_expositon_one_hour[i-1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2427 future_nitrogen_pressure[i - 1] = future_nitrogen_pressure[i - 1] + (inspired_nitrogen_pressure - future_nitrogen_pressure[i - 1]) * float_buehlmann_N2_factor_expositon_one_hour[i-1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2428 helium_pressure[i - 1] = future_helium_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2429 nitrogen_pressure[i - 1] = future_nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2430 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2431 vpm_calc_deco();
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2432 while((status = vpm_calc_critcal_volume(true,true)) == CALC_CRITICAL);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2433
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2434 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2435
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2436 temp_segment_time -= 60;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2437 run_time -= 60;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2438 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2439 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2440 future_helium_pressure[i - 1] = previous_helium_pressure[i-1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2441 future_nitrogen_pressure[i - 1] = previous_nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2442 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2443 //}
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2444 //}
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2445 //if(!nullzeit_unter60 || begin || temp_segment_time > 10)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2446 //{
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2447
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2448 status = CALC_END;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2449 if(temp_segment_time < 60)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2450 nullzeit_unter60 = true;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2451
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2452 while (status == CALC_END)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2453 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2454 // count++;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2455 //if(count >= 5)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2456 //return CALC_NULLZEIT2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2457 temp_segment_time += 5;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2458 if(temp_segment_time >= 300)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2459 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2460 pDecoInfo->output_ndl_seconds = temp_segment_time * 60;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2461 return CALC_NULLZEIT;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2462 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2463 if(nullzeit_unter60 && temp_segment_time > 60)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2464 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2465 nullzeit_unter60 = false;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2466 //tts[NULLZEIT] = temp_segment_time * 60;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2467 return CALC_NULLZEIT;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2468 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2469 run_time += 5;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2470 //goto L700;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2471 for (i = 1; i <= 16; ++i) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2472 previous_helium_pressure[i-1] = future_helium_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2473 previous_nitrogen_pressure[i - 1] = future_nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2474 future_helium_pressure[i - 1] = future_helium_pressure[i - 1] + (inspired_helium_pressure - future_helium_pressure[i - 1]) * float_buehlmann_He_factor_expositon_five_minutes[i-1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2475 future_nitrogen_pressure[i - 1] = future_nitrogen_pressure[i - 1] + (inspired_nitrogen_pressure - future_nitrogen_pressure[i - 1]) * float_buehlmann_N2_factor_expositon_five_minutes[i-1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2476 helium_pressure[i - 1] = future_helium_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2477 nitrogen_pressure[i - 1] = future_nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2478 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2479 vpm_calc_deco();
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2480 while((status =vpm_calc_critcal_volume(true,true)) == CALC_CRITICAL);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2481 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2482 temp_segment_time -= 5;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2483 run_time -= 5;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2484 for (i = 1; i <= 16; ++i) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2485 future_helium_pressure[i - 1] = previous_helium_pressure[i-1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2486 future_nitrogen_pressure[i - 1] = previous_nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2487 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2488 status = CALC_END;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2489 //if(temp_segment_time < 5)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2490 //count = 2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2491 //}
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2492 //else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2493 //count = 1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2494 if(temp_segment_time <= 20)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2495 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2496 while (status == CALC_END)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2497 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2498 //time_counter = temp_segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2499 //count++;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2500 //if(count > 2)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2501 //return CALC_NULLZEIT2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2502 temp_segment_time += minimum_deco_stop_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2503 run_time += minimum_deco_stop_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2504 //goto L700;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2505 for (i = 1; i <= 16; ++i) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2506 future_helium_pressure[i - 1] = future_helium_pressure[i - 1] + (inspired_helium_pressure - future_helium_pressure[i - 1]) * float_buehlmann_He_factor_expositon_one_minute[i-1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2507 future_nitrogen_pressure[i - 1] = future_nitrogen_pressure[i - 1] + (inspired_nitrogen_pressure - future_nitrogen_pressure[i - 1]) * float_buehlmann_N2_factor_expositon_one_minute[i-1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2508 helium_pressure[i - 1] = future_helium_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2509 nitrogen_pressure[i - 1] =future_nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2510
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2511 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2512 vpm_calc_deco();
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2513 while((status =vpm_calc_critcal_volume(true,true)) == CALC_CRITICAL);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2514
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2515 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2516 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2517 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2518 temp_segment_time += 5;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2519 pDecoInfo->output_ndl_seconds = temp_segment_time * 60;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2520 if(temp_segment_time > 1)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2521 return CALC_NULLZEIT;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2522 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2523 return CALC_BEGIN;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2524 }