annotate Discovery/Src/vpm.c @ 157:018586760ca7 FlipDisplay

Binaries for beta testing SPI monitoring active
author Ideenmodellierer
date Sun, 03 Mar 2019 19:20:18 +0100
parents e1d66bc78f9a
children 3949781096d4
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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;
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309 pDECOINFO->output_relative_gradient = 0;
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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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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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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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parents:
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378 /* =============================================================================== */
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heinrichsweikamp
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379 /* =============================================================================== */
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heinrichsweikamp
parents:
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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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parents:
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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
parents:
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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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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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407 float fraction_helium_begin;
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408 float fraction_helium_end;
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409 float fraction_nitrogen_begin;
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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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413 /* loop */
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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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heinrichsweikamp
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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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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:
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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
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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
parents:
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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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parents:
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473
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heinrichsweikamp
parents:
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474 //nextround???
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heinrichsweikamp
parents:
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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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parents:
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484 float n2_pressure_start_of_deco_zone[16];
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parents:
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485 float he_pressure_start_of_deco_zone[16];
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heinrichsweikamp
parents:
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486 float phase_volume_time[16];
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487 float n2_pressure_start_of_ascent[16];
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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
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492 float deco_phase_volume_time;
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parents:
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493
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494 float run_time_start_of_ascent;
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heinrichsweikamp
parents:
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495
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496 float rate;
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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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503
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504 //float deepest_possible_stop_depth;
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parents:
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505 // altitude_of_dive,
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heinrichsweikamp
parents:
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506 short i;
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heinrichsweikamp
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507 int j = 0;
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heinrichsweikamp
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508
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509 // float rounding_operation;
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heinrichsweikamp
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510
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511 /* =============================================================================== */
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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
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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
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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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520 number_of_changes = 1;
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heinrichsweikamp
parents:
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521
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522 barometric_pressure = pInput->pressure_surface_bar * 10;
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diff changeset
523 depth_change[0] =(pInput->pressure_ambient_bar - pInput->pressure_surface_bar)* 10;
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diff changeset
524 mix_change[0] = 0;
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heinrichsweikamp
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diff changeset
525 rate_change[0 ] = -10;// neu 160215 hw, zuvor: -12;
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heinrichsweikamp
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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 {
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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 ;
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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];
5f11787b4f42 include in ostc4 repository
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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parents:
diff changeset
567 }
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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 */
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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
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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 /* =============================================================================== */
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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
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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)
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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
5f11787b4f42 include in ostc4 repository
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.;
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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.;
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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 }
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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 */
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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;
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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 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
688 if(begin)
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heinrichsweikamp
parents:
diff changeset
689 {
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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 */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
870 /* total phase volume time. The schedule is converged when the difference is */
5f11787b4f42 include in ostc4 repository
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 */
5f11787b4f42 include in ostc4 repository
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 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
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 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
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];
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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 */
5f11787b4f42 include in ostc4 repository
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)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
979 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
980
5f11787b4f42 include in ostc4 repository
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;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
984 // hw 1601209 int count = 0;
5f11787b4f42 include in ostc4 repository
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);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
991 //max_first_stop_depth = fmaxf(first_stop_depth,max_first_stop_depth);
5f11787b4f42 include in ostc4 repository
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 */
5f11787b4f42 include in ostc4 repository
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];
5f11787b4f42 include in ostc4 repository
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
5f11787b4f42 include in ostc4 repository
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)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1011 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1012 calc_deco_ceiling(&deco_ceiling_depth, true);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1013 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1014 if(buehlmannSafety)
5f11787b4f42 include in ostc4 repository
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 {
5f11787b4f42 include in ostc4 repository
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
5f11787b4f42 include in ostc4 repository
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;
5f11787b4f42 include in ostc4 repository
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 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1030 }
5f11787b4f42 include in ostc4 repository
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);
5f11787b4f42 include in ostc4 repository
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);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1038
5f11787b4f42 include in ostc4 repository
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);
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heinrichsweikamp
parents:
diff changeset
1042 //surfacetime += segment_time;
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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. */
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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);
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heinrichsweikamp
parents:
diff changeset
1401
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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) /
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heinrichsweikamp
parents:
diff changeset
1405 (regenerated_radius_he[i - 1] * SKIN_COMPRESSION_GAMMAC);
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heinrichsweikamp
parents:
diff changeset
1406
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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;
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heinrichsweikamp
parents:
diff changeset
1409
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heinrichsweikamp
parents:
diff changeset
1410 pVpm->initial_allowable_gradient_he[i - 1] =
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heinrichsweikamp
parents:
diff changeset
1411 initial_allowable_grad_he_pa / 101325.0f * UNITS_FACTOR;
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heinrichsweikamp
parents:
diff changeset
1412
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heinrichsweikamp
parents:
diff changeset
1413 allowable_gradient_he[i - 1] =
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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] =
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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;
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heinrichsweikamp
parents:
diff changeset
1420 } /* calc_initial_allowable_gradient */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1421
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heinrichsweikamp
parents:
diff changeset
1422 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
1423 /* SUBROUTINE CALC_DECO_CEILING */
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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 */
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heinrichsweikamp
parents:
diff changeset
1428 /* subroutine to determine the actual deco schedule. */
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heinrichsweikamp
parents:
diff changeset
1429 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
1430
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heinrichsweikamp
parents:
diff changeset
1431 int calc_deco_ceiling(float *deco_ceiling_depth,_Bool fallowable)
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heinrichsweikamp
parents:
diff changeset
1432 {
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heinrichsweikamp
parents:
diff changeset
1433 /* System generated locals */
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heinrichsweikamp
parents:
diff changeset
1434 float r1, r2;
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heinrichsweikamp
parents:
diff changeset
1435 /* Local variables */
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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;
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heinrichsweikamp
parents:
diff changeset
1441 float gradient_he, gradient_n2;
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heinrichsweikamp
parents:
diff changeset
1442
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heinrichsweikamp
parents:
diff changeset
1443 if(!vpm_b)
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heinrichsweikamp
parents:
diff changeset
1444 fallowable = true;
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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. */
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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)
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heinrichsweikamp
parents:
diff changeset
1460 {
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heinrichsweikamp
parents:
diff changeset
1461
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heinrichsweikamp
parents:
diff changeset
1462 // abfrage raus und pointer stattdessen
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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];
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heinrichsweikamp
parents:
diff changeset
1466 }
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heinrichsweikamp
parents:
diff changeset
1467 else{
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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 }
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heinrichsweikamp
parents:
diff changeset
1471
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heinrichsweikamp
parents:
diff changeset
1472 gas_loading = helium_pressure[i - 1] + nitrogen_pressure[i - 1];
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heinrichsweikamp
parents:
diff changeset
1473
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heinrichsweikamp
parents:
diff changeset
1474 if (gas_loading > 0)
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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
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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 -
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heinrichsweikamp
parents:
diff changeset
1484 weighted_allowable_gradient;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1485 }
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heinrichsweikamp
parents:
diff changeset
1486 else
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heinrichsweikamp
parents:
diff changeset
1487 {
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heinrichsweikamp
parents:
diff changeset
1488 /* Computing MIN */
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heinrichsweikamp
parents:
diff changeset
1489 r1 = gradient_he;
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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
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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 }
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heinrichsweikamp
parents:
diff changeset
1496
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1497 /* =============================================================================== */
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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
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heinrichsweikamp
parents:
diff changeset
1502 if (tolerated_ambient_pressure < 0) {
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heinrichsweikamp
parents:
diff changeset
1503 tolerated_ambient_pressure = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1504 }
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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 }
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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
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1563 /* Local variables */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1564 short i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1565 float compartment_gradient;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1566
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1567 /* loop */
5f11787b4f42 include in ostc4 repository
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)
5f11787b4f42 include in ostc4 repository
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);
5f11787b4f42 include in ostc4 repository
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);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1587 }
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heinrichsweikamp
parents:
diff changeset
1588 return 0;
5f11787b4f42 include in ostc4 repository
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 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1592 /* SUBROUTINE CALC_SURFACE_PHASE_VOLUME_TIME */
5f11787b4f42 include in ostc4 repository
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 */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1595 /* supersaturation gradient x time over the surface interval. The VPM */
5f11787b4f42 include in ostc4 repository
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 */
5f11787b4f42 include in ostc4 repository
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;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1612
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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 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
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)
5f11787b4f42 include in ostc4 repository
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 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1633 decay_time_to_zero_gradient =
5f11787b4f42 include in ostc4 repository
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 {
5f11787b4f42 include in ostc4 repository
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;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1656 } /* calc_surface_phase_volume_time */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1657
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1658 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
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 {
5f11787b4f42 include in ostc4 repository
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: */
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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);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2253 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2254 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2255 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2256
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2257 /*float pressure_save =dive_data.pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2258 dive_data.pressure = ambient_pressure/10;
5f11787b4f42 include in ostc4 repository
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;*/
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2261 run_time += segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2262 return;
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heinrichsweikamp
parents:
diff changeset
2263 } /* decompression_stop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2264
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2265 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
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
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2268 // with decreasing ambient pressure during the decompression profile based
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2269 // on Boyle's Law considerations.
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2270 //===============================================================================
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2271 void BOYLES_LAW_COMPENSATION (float* First_Stop_Depth,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2272 float* Deco_Stop_Depth,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2273 float* Step_Size)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2274 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2275 short i;
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heinrichsweikamp
parents:
diff changeset
2276
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2277 float Next_Stop;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2278 float Ambient_Pressure_First_Stop, Ambient_Pressure_Next_Stop;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2279 float Amb_Press_First_Stop_Pascals, Amb_Press_Next_Stop_Pascals;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2280 float A, B, C, Low_Bound, High_Bound, Ending_Radius;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2281 float Deco_Gradient_Pascals;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2282 float Allow_Grad_First_Stop_He_Pa, Radius_First_Stop_He;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2283 float Allow_Grad_First_Stop_N2_Pa, Radius_First_Stop_N2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2284
5f11787b4f42 include in ostc4 repository
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 //===============================================================================
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2288 // float Radius1_He[16], Radius2_He[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2289 // float Radius1_N2[16], Radius2_N2[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2290 float root_factor;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2291
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2292 //===============================================================================
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heinrichsweikamp
parents:
diff changeset
2293 // CALCULATIONS
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2294 //===============================================================================
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heinrichsweikamp
parents:
diff changeset
2295 Next_Stop = *Deco_Stop_Depth - *Step_Size;
5f11787b4f42 include in ostc4 repository
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
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2300 Ambient_Pressure_Next_Stop = Next_Stop + barometric_pressure;
5f11787b4f42 include in ostc4 repository
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
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2304 Amb_Press_Next_Stop_Pascals =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2305 (Ambient_Pressure_Next_Stop/UNITS_FACTOR) * 101325.0f;
5f11787b4f42 include in ostc4 repository
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
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2308 for( i = 0; i < 16;i++)
5f11787b4f42 include in ostc4 repository
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;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2312
5f11787b4f42 include in ostc4 repository
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;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2315
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2316 // Radius1_He[i] = Radius_First_Stop_He;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2317 A = Amb_Press_Next_Stop_Pascals;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2318 B = -2.0f * SURFACE_TENSION_GAMMA;
5f11787b4f42 include in ostc4 repository
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;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2323 High_Bound = Radius_First_Stop_He * root_factor;
5f11787b4f42 include in ostc4 repository
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);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2326
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2327 radius_root_finder(&A,&B,&C, &Low_Bound, &High_Bound,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2328 &Ending_Radius);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2329
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2330 // Radius2_He[i] = Ending_Radius;
5f11787b4f42 include in ostc4 repository
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;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2333
5f11787b4f42 include in ostc4 repository
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 }
5f11787b4f42 include in ostc4 repository
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
5f11787b4f42 include in ostc4 repository
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;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2390 //if(begin)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2391 //{
5f11787b4f42 include in ostc4 repository
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;
5f11787b4f42 include in ostc4 repository
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
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2407 //if(!nullzeit_unter60)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2408 //{
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2409 status = CALC_END;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2410 while (status == CALC_END)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2411 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2412 count++;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2413 //if(count == 7)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2414 //return CALC_NULLZEIT2;
5f11787b4f42 include in ostc4 repository
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;
5f11787b4f42 include in ostc4 repository
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 }