annotate Discovery/Src/vpm.c @ 307:b6436edfb2c0 cleanup-4

cleanup: factor out unused stopwatch code Visually, this looks a bit of a dangerous cleanup, but its not :-) To explain this cleanup: stopwatch_seconds is never used, so assign to it is useless, and the variable can be removed. Now, stopwatch_start_at_this_dive_time_seconds is not used any more, so remove it as well. Now, look at the boolResetStopwatch code. It is used but only to reset itself. This makes the whole stopwatch block in data_exchange_main.c a useless thing. All the other cleanup is trivial. Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
author Jan Mulder <jlmulder@xs4all.nl>
date Wed, 22 May 2019 22:22:15 +0200
parents 305f251cc981
children b7d93ff6b3b2
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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 "vpm.h"
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81 #include "decom.h"
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82
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83 #define GAS_N2 0
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84 #define GAS_HE 1
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85
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86 static const _Bool buehlmannSafety = true;
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87 /* Common Block Declarations */
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88
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89 extern const float SURFACE_TENSION_GAMMA; //!Adj. Range: 0.015 to 0.065 N/m
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90 extern const float SKIN_COMPRESSION_GAMMAC; //!Adj. Range: 0.160 to 0.290 N/m
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91 extern const float UNITS_FACTOR;
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92 extern const float WATER_VAPOR_PRESSURE; // (Schreiner value) based on respiratory quotien
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93 extern const float CRIT_VOLUME_PARAMETER_LAMBDA; //!Adj. Range: 6500 to 8300 fsw-min
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94 //extern const float GRADIENT_ONSET_OF_IMPERM_ATM; //!Adj. Range: 5.0 to 10.0 atm
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95 extern const float REGENERATION_TIME_CONSTANT; //!Adj. Range: 10080 to 51840 min
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96 //extern const float PRESSURE_OTHER_GASES_MMHG; //!Constant value for PO2 up to 2 atm
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97 extern const float CONSTANT_PRESSURE_OTHER_GASES; // PRESSURE_OTHER_GASES_MMHG / 760. * UNITS_FACTOR;
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98
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99 extern const float HELIUM_TIME_CONSTANT[];
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100 extern const float NITROGEN_TIME_CONSTANT[];
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101
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102 static float minimum_deco_stop_time;
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103 static float run_time, run_time_first_stop;
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104 static float segment_time;
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105 static short mix_number;
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106 static float barometric_pressure;
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107 static _Bool altitude_dive_algorithm_off;
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108 static _Bool units_equal_fsw, units_equal_msw;
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109
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110 /* by hw 11.06.2015 to allow */
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111 static float gCNS_VPM;
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112
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113 static float helium_pressure[16], nitrogen_pressure[16];
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114 static float surface_phase_volume_time[16];
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115 static float regenerated_radius_he[16], regenerated_radius_n2[16];
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116 static float allowable_gradient_he[16], allowable_gradient_n2[16];
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117
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118 //_Bool deco_zone_reached;
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119 static _Bool critical_volume_algorithm_off;
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120 static float max_first_stop_depth;
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121 static float max_deco_ceiling_depth;
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122 //Boylslaw compensation
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123 static float deco_gradient_he[16];
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124 static float deco_gradient_n2[16];
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125 static int vpm_calc_what;
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126 static int count_critical_volume_iteration;
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127 static short number_of_changes;
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128 static float depth_change[11];
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129 static float step_size_change[11];
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130 static float rate_change[11];
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131 static short mix_change[11];
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132
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133 static const _Bool vpm_b = true;
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134
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135 extern const float float_buehlmann_N2_factor_expositon_20_seconds[];
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136 extern const float float_buehlmann_He_factor_expositon_20_seconds[];
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137 extern const float float_buehlmann_N2_factor_expositon_one_minute[];
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138 extern const float float_buehlmann_He_factor_expositon_one_minute[];
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139 extern const float float_buehlmann_N2_factor_expositon_five_minutes[];
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140 extern const float float_buehlmann_He_factor_expositon_five_minutes[];
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141 extern const float float_buehlmann_N2_factor_expositon_one_hour[];
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142 extern const float float_buehlmann_He_factor_expositon_one_hour[];
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143
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144 static float depth_start_of_deco_calc;
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145 static float depth_start_of_deco_zone;
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146 static float first_stop_depth;
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147 static float run_time_start_of_deco_zone;
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148
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149 static float r_nint(float *x);
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150 static float r_int(float *x);
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151 static _Bool nullzeit_unter60;
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152 static int vpm_calc_status;
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153 static _Bool buehlmann_wait_exceeded = false;
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154
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155 static SLifeData* pInput = NULL;
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156 static SVpm* pVpm = NULL;
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157 static SDecoinfo* pDecoInfo = NULL;
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158 static SDiveSettings* pDiveSettings = NULL;
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159
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160 static float r_nint(float *x)
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161 {
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162 return( (*x)>=0 ?
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163 floorf(*x + 0.5f) : -floorf(0.5f - *x) );
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164 }
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165
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166 static float r_int(float *x)
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167 {
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168 return( (*x>0) ? floorf(*x) : -floorf(- *x) );
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169 }
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170
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171 /** private functions
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172 */
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173 extern int radius_root_finder (float *a, float *b, float *c,float *low_bound, float *high_bound, float *ending_radius);
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174
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175 static int nuclear_regeneration(float *dive_time);// clock_();
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176 static int calc_deco_ceiling(float *deco_ceiling_depth,_Bool fallowablw);
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177 static int critical_volume(float *deco_phase_volume_time); ;
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178 static int calc_start_of_deco_zone(float *starting_depth, float *rate, float *depth_start_of_deco_zone);
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179 static int calc_initial_allowable_gradient(void);
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180 static void decompression_stop(float *deco_stop_depth, float *step_size, _Bool final_deco_calculation);
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181 static 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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182 static int calc_surface_phase_volume_time(void);
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183 static int calc_max_actual_gradient(float *deco_stop_depth);
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184 static int projected_ascent(float *starting_depth, float *rate, float *deco_stop_depth, float *step_size);
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185 static void vpm_calc_deco(void);
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186 static int vpm_calc_critcal_volume(_Bool begin,_Bool calc_nulltime);
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187 static int vpm_check_converged(_Bool calc_nulltime);
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188 static int vpm_calc_final_deco(_Bool begin);
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189 static void BOYLES_LAW_COMPENSATION (float* First_Stop_Depth,float * Deco_Stop_Depth,float* Step_Size);
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190 static int vpm_calc_ndl(void);
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191 static void vpm_init_1(void);
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192 static void vpm_calc_deco_ceiling(void);
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193
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194 static void vpm_init_1(void)
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195 {
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196 units_equal_msw = true;
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197 units_equal_fsw = false;
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198 altitude_dive_algorithm_off= true; //!Options: ON or OFF
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199 minimum_deco_stop_time=1.0; //!Options: float positive number
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200 critical_volume_algorithm_off= false; //!Options: ON or OFF
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201 run_time = 0.;
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202 //barometric_pressure = dive_data.surface * 10;
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203
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204 //mix_number = dive_data.selected_gas + 1;
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205
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206 max_first_stop_depth = 0;
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207 max_deco_ceiling_depth = 0;
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208 //deco_zone_reached = false;
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209 depth_start_of_deco_calc = 0;
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210 depth_start_of_deco_zone = 0;
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211 first_stop_depth = 0;
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212 run_time_start_of_deco_zone = 0;
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213
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214 gCNS_VPM = 0;
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215 }
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216
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217 float vpm_get_CNS(void)
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218 {
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219 return gCNS_VPM;
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220 }
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221
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222 int vpm_calc(SLifeData* pINPUT,
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223 SDiveSettings* pSettings,
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224 SVpm* pVPM,
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225 SDecoinfo*
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226 pDECOINFO,
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227 int calc_what)
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228 {
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229 vpm_init_1();
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230 //decom_CreateGasChangeList(pSettings, pINPUT);
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231 vpm_calc_what = calc_what;
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232 /**clear decoInfo*/
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233 pDECOINFO->output_time_to_surface_seconds = 0;
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234 pDECOINFO->output_ndl_seconds = 0;
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235 pDECOINFO->output_ceiling_meter = 0;
247
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236 pDECOINFO->super_saturation = 0;
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237 uint8_t tmp_calc_status;
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238 for(int i=0;i<DECOINFO_STRUCT_MAX_STOPS;i++)
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239 {
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240 pDECOINFO->output_stop_length_seconds[i] = 0;
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241 }
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242
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243 if(pINPUT->dive_time_seconds_without_surface_time < 60)
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244 {
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245 vpm_calc_status = CALC_NDL;
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246 return vpm_calc_status;
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247 }
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248 pVpm = pVPM;
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249 pInput = pINPUT;
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250 pDecoInfo = pDECOINFO;
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251 pDiveSettings = pSettings;
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252
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253 if(vpm_calc_status == CALC_NDL)
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254 {
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255 tmp_calc_status = vpm_calc_ndl();
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256 }
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257 else
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258 {
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259 tmp_calc_status = CALC_BEGIN;
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260 }
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261 //Normal Deco calculation
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262 if(tmp_calc_status != CALC_NDL)
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263 {
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264 max_first_stop_depth = pVpm->max_first_stop_depth_save;
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265 run_time_start_of_deco_zone = pVpm->run_time_start_of_deco_zone_save;
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266 depth_start_of_deco_zone = pVpm->depth_start_of_deco_zone_save;
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267 for (int i = 0; i < 16; ++i) {
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268 helium_pressure[i] = pInput->tissue_helium_bar[i] * 10;
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269 nitrogen_pressure[i] = pInput->tissue_nitrogen_bar[i] * 10;
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270 }
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271 vpm_calc_deco();
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272 tmp_calc_status = vpm_calc_critcal_volume(true,false);
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273 if(vpm_calc_what == DECOSTOPS)
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274 {
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275 pVpm->max_first_stop_depth_save = max_first_stop_depth;
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276 pVpm->run_time_start_of_deco_zone_save = run_time_start_of_deco_zone;
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277 pVpm->depth_start_of_deco_zone_save = depth_start_of_deco_zone;
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278 }
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279 }
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280
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281 //Only Decostops not futute stops
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282 if(vpm_calc_what == DECOSTOPS)
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283 vpm_calc_status = tmp_calc_status;
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284 return vpm_calc_status;
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285 }
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286
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287 void vpm_saturation_after_ascent(SLifeData* input)
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288 {
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289 int i = 0;
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290 for (i = 0; i < 16; ++i) {
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291 pInput->tissue_helium_bar[i] = helium_pressure[i] / 10;
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292 pInput->tissue_nitrogen_bar[i] = nitrogen_pressure[i] / 10;
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293 }
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294 pInput->pressure_ambient_bar = pInput->pressure_surface_bar;
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295 }
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296 /* =============================================================================== */
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297 /* NOTE ABOUT PRESSURE UNITS USED IN CALCULATIONS: */
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298 /* It is the convention in decompression calculations to compute all gas */
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299 /* loadings, absolute pressures, partial pressures, etc., in the units of */
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300 /* depth pressure that you are diving - either feet of seawater (fsw) or */
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301 /* meters of seawater (msw). This program follows that convention with the */
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302 /* the exception that all VPM calculations are performed in SI units (by */
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303 /* necessity). Accordingly, there are several conversions back and forth */
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304 /* between the diving pressure units and the SI units. */
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305 /* =============================================================================== */
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306 /* =============================================================================== */
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307 /* FUNCTION SUBPROGRAM FOR GAS LOADING CALCULATIONS - ASCENT AND DESCENT */
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308 /* =============================================================================== */
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309
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310
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311
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312 /* =============================================================================== */
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313 /* SUBROUTINE GAS_LOADINGS_ASCENT_DESCENT */
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314 /* Purpose: This subprogram applies the Schreiner equation to update the */
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315 /* gas loadings (partial pressures of helium and nitrogen) in the half-time */
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316 /* compartments due to a linear ascent or descent segment at a constant rate. */
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317 /* =============================================================================== */
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318
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319 static int gas_loadings_ascent_descen(float* helium_pressure,
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320 float* nitrogen_pressure,
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321 float starting_depth,
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322 float ending_depth,
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323 float rate,_Bool check_gas_change)
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324 {
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325 short i;
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326 float initial_inspired_n2_pressure,
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327 initial_inspired_he_pressure, nitrogen_rate,
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328 last_run_time,
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329 starting_ambient_pressure,
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330 ending_ambient_pressure;
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331 float initial_helium_pressure[16];
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332 float initial_nitrogen_pressure[16];
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333 float helium_rate;
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334 float fraction_helium_begin;
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335 float fraction_helium_end;
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336 float fraction_nitrogen_begin;
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337 float fraction_nitrogen_end;
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338 float ending_depth_tmp = ending_depth;
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339 float segment_time_tmp = 0;
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340 /* loop */
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341 /* =============================================================================== */
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342 /* CALCULATIONS */
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343 /* =============================================================================== */
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344 segment_time = (ending_depth_tmp - starting_depth) / rate;
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345 last_run_time = run_time;
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346 run_time = last_run_time + segment_time;
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347 do {
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348 ending_depth_tmp = ending_depth;
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349 if (starting_depth > ending_depth && check_gas_change && number_of_changes > 1)
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350 {
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351 for (i = 1; i < number_of_changes; ++i)
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352 {
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353 if (depth_change[i] < starting_depth && depth_change[i] > ending_depth)
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354 {
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355 ending_depth_tmp = depth_change[i];
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356 break;
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357 }
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358 }
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359 for (i = 1; i < number_of_changes; ++i)
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360 {
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361 if (depth_change[i] >= starting_depth)
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362 {
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363 mix_number = mix_change[i];
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364 }
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365 }
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366 }
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367 segment_time_tmp = (ending_depth_tmp - starting_depth) / rate;
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368 ending_ambient_pressure = ending_depth_tmp + barometric_pressure;
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369 starting_ambient_pressure = starting_depth + barometric_pressure;
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370 decom_get_inert_gases( starting_ambient_pressure / 10, (&pDiveSettings->decogaslist[mix_number]), &fraction_nitrogen_begin, &fraction_helium_begin );
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371 decom_get_inert_gases( ending_ambient_pressure / 10, (&pDiveSettings->decogaslist[mix_number]), &fraction_nitrogen_end, &fraction_helium_end );
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372
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373 initial_inspired_he_pressure = (starting_ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_helium_begin;
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374 initial_inspired_n2_pressure = (starting_ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_nitrogen_begin;
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375 //helium_rate = *rate * fraction_helium[mix_number - 1];
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376 helium_rate = ((ending_ambient_pressure - WATER_VAPOR_PRESSURE)* fraction_helium_end - initial_inspired_he_pressure)/segment_time_tmp;
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377 //nitrogen_rate2 = *rate * fraction_nitrogen[mix_number - 1];
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378 nitrogen_rate = ((ending_ambient_pressure - WATER_VAPOR_PRESSURE)* fraction_nitrogen_end - initial_inspired_n2_pressure)/segment_time_tmp;
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379
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380
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381 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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382 //if(fabs(nitrogen_rate - nitrogen_rate2) > 0.000001)
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383 //return -2;
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384 for (i = 1; i <= 16; ++i)
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385 {
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386 initial_helium_pressure[i - 1] = helium_pressure[i - 1];
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387 initial_nitrogen_pressure[i - 1] = nitrogen_pressure[i - 1];
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388 helium_pressure[i - 1] =
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389 schreiner_equation__2(&initial_inspired_he_pressure,
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390 &helium_rate,
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391 &segment_time,
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392 &HELIUM_TIME_CONSTANT[i - 1],
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393 &initial_helium_pressure[i - 1]);
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394 nitrogen_pressure[i - 1] =
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395 schreiner_equation__2(&initial_inspired_n2_pressure,
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396 &nitrogen_rate,
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397 &segment_time,
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398 &NITROGEN_TIME_CONSTANT[i - 1],
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399 &initial_nitrogen_pressure[i - 1]);
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400
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401 //nextround???
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402
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403 }
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404 starting_depth = ending_depth_tmp;
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405 } while(ending_depth_tmp > ending_depth);
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406
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407 return 0;
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408 } /* gas_loadings_ascent_descen */
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409
290
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410 static float last_phase_volume_time[16];
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411 static float n2_pressure_start_of_deco_zone[16];
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412 static float he_pressure_start_of_deco_zone[16];
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413 static float phase_volume_time[16];
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414 static float n2_pressure_start_of_ascent[16];
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415 static float he_pressure_start_of_ascent[16];
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416 static float run_time_start_of_deco_calc;
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417 static float starting_depth;
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418 static float last_run_time;
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419 static float deco_phase_volume_time;
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420 static float run_time_start_of_ascent;
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421 static float rate;
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422 static float step_size;
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423 static _Bool vpm_violates_buehlmann;
38
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424
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diff changeset
425 static void vpm_calc_deco(void)
38
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426 {
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427 /* System generated locals */
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428
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429 //float deepest_possible_stop_depth;
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430 // altitude_of_dive,
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431 short i;
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432 int j = 0;
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433
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434 // float rounding_operation;
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435
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436 /* =============================================================================== */
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437 /* INPUT PARAMETERS TO BE USED FOR STAGED DECOMPRESSION AND SAVE IN ARRAYS. */
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438 /* ASSIGN INITAL PARAMETERS TO BE USED AT START OF ASCENT */
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439 /* The user has the ability to change mix, ascent rate, and step size in any */
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440 /* combination at any depth during the ascent. */
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441 /* =============================================================================== */
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442
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443 run_time = ((float)pInput->dive_time_seconds )/ 60;
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444 count_critical_volume_iteration = 0;
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445 number_of_changes = 1;
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446
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447 barometric_pressure = pInput->pressure_surface_bar * 10;
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448 depth_change[0] =(pInput->pressure_ambient_bar - pInput->pressure_surface_bar)* 10;
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449 mix_change[0] = 0;
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450 rate_change[0 ] = -10;// neu 160215 hw, zuvor: -12;
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451 step_size_change[0] = 3;
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452 vpm_violates_buehlmann = false;
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453
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454 for (i = 1; i < BUEHLMANN_STRUCT_MAX_GASES; i++)
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455 {
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456 depth_change[i] = 0;
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457 mix_change[i] = 0;
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458 }
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459 j = 0;
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460
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461 for (i = 1; i < BUEHLMANN_STRUCT_MAX_GASES; i++)
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462 {
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463 if(pDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero >= depth_change[0] + 1)
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464 continue;
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465
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466 if(pDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero <= 0)
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467 break;
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468
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469 j++;
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470 number_of_changes ++;
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471 depth_change[j] = pDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero ;
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472 mix_change[j] = i;
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473 rate_change[j] = -10;// neu 160215 hw, zuvor: -12;
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474 step_size_change[j] = 3;
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475 }
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476
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477 starting_depth = depth_change[0] ;
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478 mix_number = mix_change[0] ;
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479 rate = rate_change[0];
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480 step_size = step_size_change[0];
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481
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482 for (i = 0; i < 16; ++i) {
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483 he_pressure_start_of_ascent[i ] = helium_pressure[i];
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484 n2_pressure_start_of_ascent[i] = nitrogen_pressure[i];
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485 }
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486 run_time_start_of_ascent = run_time;
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487 if(starting_depth <= depth_start_of_deco_zone && vpm_calc_what == DECOSTOPS)
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488 {
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489 pVpm->deco_zone_reached = true;
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parents:
diff changeset
490 depth_start_of_deco_calc = starting_depth;
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heinrichsweikamp
parents:
diff changeset
491 critical_volume_algorithm_off = true;
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heinrichsweikamp
parents:
diff changeset
492 }
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heinrichsweikamp
parents:
diff changeset
493 else
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heinrichsweikamp
parents:
diff changeset
494 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
495 //if(deco_zone_reached)
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heinrichsweikamp
parents:
diff changeset
496 //{
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heinrichsweikamp
parents:
diff changeset
497 pVpm->deco_zone_reached = false;
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heinrichsweikamp
parents:
diff changeset
498 critical_volume_algorithm_off = false;
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heinrichsweikamp
parents:
diff changeset
499 //max_first_stop_depth = 0;
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heinrichsweikamp
parents:
diff changeset
500 //max_first_stop_depth_save = 0;
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heinrichsweikamp
parents:
diff changeset
501 //}
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
502 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
503 /* BEGIN PROCESS OF ASCENT AND DECOMPRESSION */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
504 /* First, calculate the regeneration of critical radii that takes place over */
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heinrichsweikamp
parents:
diff changeset
505 /* the dive time. The regeneration time constant has a time scale of weeks */
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heinrichsweikamp
parents:
diff changeset
506 /* so this will have very little impact on dives of normal length, but will */
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heinrichsweikamp
parents:
diff changeset
507 /* have major impact for saturation dives. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
508 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
509
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heinrichsweikamp
parents:
diff changeset
510 nuclear_regeneration(&run_time);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
511
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heinrichsweikamp
parents:
diff changeset
512 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
513 /* CALCULATE INITIAL ALLOWABLE GRADIENTS FOR ASCENT */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
514 /* This is based on the maximum effective crushing pressure on critical radii */
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heinrichsweikamp
parents:
diff changeset
515 /* in each compartment achieved during the dive profile. */
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heinrichsweikamp
parents:
diff changeset
516 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
517
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heinrichsweikamp
parents:
diff changeset
518 calc_initial_allowable_gradient();
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
519
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heinrichsweikamp
parents:
diff changeset
520 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
521 /* SAVE VARIABLES AT START OF ASCENT (END OF BOTTOM TIME) SINCE THESE WILL */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
522 /* BE USED LATER TO COMPUTE THE FINAL ASCENT PROFILE THAT IS WRITTEN TO THE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
523 /* OUTPUT FILE. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
524 /* The VPM uses an iterative process to compute decompression schedules so */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
525 /* there will be more than one pass through the decompression loop. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
526 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
527
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
528 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
529 /* CALCULATE THE DEPTH WHERE THE DECOMPRESSION ZONE BEGINS FOR THIS PROFILE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
530 /* BASED ON THE INITIAL ASCENT PARAMETERS AND WRITE THE DEEPEST POSSIBLE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
531 /* DECOMPRESSION STOP DEPTH TO THE OUTPUT FILE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
532 /* Knowing where the decompression zone starts is very important. Below */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
533 /* that depth there is no possibility for bubble formation because there */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
534 /* will be no supersaturation gradients. Deco stops should never start */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
535 /* below the deco zone. The deepest possible stop deco stop depth is */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
536 /* defined as the next "standard" stop depth above the point where the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
537 /* leading compartment enters the deco zone. Thus, the program will not */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
538 /* base this calculation on step sizes larger than 10 fsw or 3 msw. The */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
539 /* deepest possible stop depth is not used in the program, per se, rather */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
540 /* it is information to tell the diver where to start putting on the brakes */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
541 /* during ascent. This should be prominently displayed by any deco program. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
542 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
543
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heinrichsweikamp
parents:
diff changeset
544 calc_start_of_deco_zone(&starting_depth, &rate, &depth_start_of_deco_zone);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
545 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
546 /* TEMPORARILY ASCEND PROFILE TO THE START OF THE DECOMPRESSION ZONE, SAVE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
547 /* VARIABLES AT THIS POINT, AND INITIALIZE VARIABLES FOR CRITICAL VOLUME LOOP */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
548 /* The iterative process of the VPM Critical Volume Algorithm will operate */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
549 /* only in the decompression zone since it deals with excess gas volume */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
550 /* released as a result of supersaturation gradients (not possible below the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
551 /* decompression zone). */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
552 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
553 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
554
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
555 run_time_start_of_deco_zone = run_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
556 depth_start_of_deco_calc = depth_start_of_deco_zone;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
557
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
558 for (i = 0; i < 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
559 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
560 pVpm->max_actual_gradient[i] = 0.;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
561 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
562 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
563
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
564 for (i = 0; i < 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
565 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
566 surface_phase_volume_time[i] = 0.;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
567 last_phase_volume_time[i] = 0.;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
568 he_pressure_start_of_deco_zone[i] = helium_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
569 n2_pressure_start_of_deco_zone[i] = nitrogen_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
570 //pVpm->max_actual_gradient[i] = 0.;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
571 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
572 run_time_start_of_deco_calc = run_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
573 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
574 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
575 /* START OF CRITICAL VOLUME LOOP */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
576 /* This loop operates between Lines 50 and 100. If the Critical Volume */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
577 /* Algorithm is toggled "off" in the program settings, there will only be */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
578 /* one pass through this loop. Otherwise, there will be two or more passes */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
579 /* through this loop until the deco schedule is "converged" - that is when a */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
580 /* comparison between the phase volume time of the present iteration and the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
581 /* last iteration is less than or equal to one minute. This implies that */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
582 /* the volume of released gas in the most recent iteration differs from the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
583 /* "critical" volume limit by an acceptably small amount. The critical */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
584 /* volume limit is set by the Critical Volume Parameter Lambda in the program */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
585 /* settings (default setting is 7500 fsw-min with adjustability range from */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
586 /* from 6500 to 8300 fsw-min according to Bruce Wienke). */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
587 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
588 /* L50: */
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heinrichsweikamp
parents:
diff changeset
589
290
5e0bb91d4a12 VPM, cleanup: 1st round
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
diff changeset
590 static float deco_stop_depth;
5e0bb91d4a12 VPM, cleanup: 1st round
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
diff changeset
591 static int vpm_calc_critcal_volume(_Bool begin,
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
592 _Bool calc_nulltime)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
593 { /* loop will run continuous there is an exit stateme */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
594
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heinrichsweikamp
parents:
diff changeset
595 short i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
596
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
597 float rounding_operation2;
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heinrichsweikamp
parents:
diff changeset
598 //float ending_depth;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
599 float deco_ceiling_depth;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
600
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heinrichsweikamp
parents:
diff changeset
601 //float deco_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
602 int count = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
603 _Bool first_stop;
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heinrichsweikamp
parents:
diff changeset
604 int dp = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
605 float tissue_He_saturation[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
606 float tissue_N2_saturation[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
607 float vpm_buehlmann_safety_gradient = 1.0f - (((float)pDiveSettings->vpm_conservatism) / 40);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
608 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
609 /* CALCULATE CURRENT DECO CEILING BASED ON ALLOWABLE SUPERSATURATION */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
610 /* GRADIENTS AND SET FIRST DECO STOP. CHECK TO MAKE SURE THAT SELECTED STEP */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
611 /* 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
612 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
613 if(begin)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
614 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
615 if(depth_start_of_deco_calc < max_first_stop_depth )
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
616 {
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heinrichsweikamp
parents:
diff changeset
617 if(vpm_b)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
618 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
619 BOYLES_LAW_COMPENSATION(&max_first_stop_depth, &depth_start_of_deco_calc, &step_size);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
620 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
621 calc_deco_ceiling(&deco_ceiling_depth, false);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
622 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
623 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
624 calc_deco_ceiling(&deco_ceiling_depth, true);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
625
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
626
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
627 if (deco_ceiling_depth <= 0.0f) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
628 deco_stop_depth = 0.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
629 } else {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
630 rounding_operation2 = deco_ceiling_depth / step_size + ( float)0.5f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
631 deco_stop_depth = r_nint(&rounding_operation2) * step_size;
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heinrichsweikamp
parents:
diff changeset
632 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
633
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
634 // buehlmann safety
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heinrichsweikamp
parents:
diff changeset
635 if(buehlmannSafety)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
636 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
637 for (i = 0; i < 16; i++)
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heinrichsweikamp
parents:
diff changeset
638 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
639 tissue_He_saturation[i] = helium_pressure[i] / 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
640 tissue_N2_saturation[i] = nitrogen_pressure[i] / 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
641 }
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heinrichsweikamp
parents:
diff changeset
642
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
643 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
644 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
645
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
646 vpm_violates_buehlmann = true;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
647 do {
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heinrichsweikamp
parents:
diff changeset
648 deco_stop_depth += 3;
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heinrichsweikamp
parents:
diff changeset
649 } while (!decom_tissue_test_tolerance(tissue_N2_saturation, tissue_He_saturation, vpm_buehlmann_safety_gradient, (deco_stop_depth / 10.0f) + pInput->pressure_surface_bar));
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heinrichsweikamp
parents:
diff changeset
650 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
651 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
652
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
653 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
654 /* PERFORM A SEPARATE "PROJECTED ASCENT" OUTSIDE OF THE MAIN PROGRAM TO MAKE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
655 /* SURE THAT AN INCREASE IN GAS LOADINGS DURING ASCENT TO THE FIRST STOP WILL */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
656 /* NOT CAUSE A VIOLATION OF THE DECO CEILING. IF SO, ADJUST THE FIRST STOP */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
657 /* DEEPER BASED ON STEP SIZE UNTIL A SAFE ASCENT CAN BE MADE. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
658 /* Note: this situation is a possibility when ascending from extremely deep */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
659 /* dives or due to an unusual gas mix selection. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
660 /* CHECK AGAIN TO MAKE SURE THAT ADJUSTED FIRST STOP WILL NOT BE BELOW THE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
661 /* DECO ZONE. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
662 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
663 if (deco_stop_depth < depth_start_of_deco_calc)
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heinrichsweikamp
parents:
diff changeset
664 {
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heinrichsweikamp
parents:
diff changeset
665 projected_ascent(&depth_start_of_deco_calc, &rate, &deco_stop_depth, &step_size);
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heinrichsweikamp
parents:
diff changeset
666 }
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heinrichsweikamp
parents:
diff changeset
667
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heinrichsweikamp
parents:
diff changeset
668 /*if (deco_stop_depth > depth_start_of_deco_zone) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
669 printf("\t\n");
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heinrichsweikamp
parents:
diff changeset
670 printf(fmt_905);
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heinrichsweikamp
parents:
diff changeset
671 printf(fmt_900);
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heinrichsweikamp
parents:
diff changeset
672 printf("\nPROGRAM TERMINATED\n");
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heinrichsweikamp
parents:
diff changeset
673 exit(1);
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heinrichsweikamp
parents:
diff changeset
674 }*/
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heinrichsweikamp
parents:
diff changeset
675
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heinrichsweikamp
parents:
diff changeset
676 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
677 /* HANDLE THE SPECIAL CASE WHEN NO DECO STOPS ARE REQUIRED - ASCENT CAN BE */
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heinrichsweikamp
parents:
diff changeset
678 /* MADE DIRECTLY TO THE SURFACE */
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heinrichsweikamp
parents:
diff changeset
679 /* Write ascent data to output file and exit the Critical Volume Loop. */
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heinrichsweikamp
parents:
diff changeset
680 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
681
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
682 if (deco_stop_depth == 0.0f)
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heinrichsweikamp
parents:
diff changeset
683 {
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heinrichsweikamp
parents:
diff changeset
684 if(calc_nulltime)
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heinrichsweikamp
parents:
diff changeset
685 {
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heinrichsweikamp
parents:
diff changeset
686 return CALC_END;
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heinrichsweikamp
parents:
diff changeset
687 }
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heinrichsweikamp
parents:
diff changeset
688 if(pVpm->deco_zone_reached)
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heinrichsweikamp
parents:
diff changeset
689 {
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heinrichsweikamp
parents:
diff changeset
690 for(dp = 0;dp < DECOINFO_STRUCT_MAX_STOPS;dp++)
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heinrichsweikamp
parents:
diff changeset
691 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
692 pDecoInfo->output_stop_length_seconds[dp] = 0;
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heinrichsweikamp
parents:
diff changeset
693 }
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heinrichsweikamp
parents:
diff changeset
694 pDecoInfo->output_ndl_seconds = 0;
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heinrichsweikamp
parents:
diff changeset
695 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
696
292
bfcea6e2ab3f translate: nullzeit -> ndl
Jan Mulder <jlmulder@xs4all.nl>
parents: 291
diff changeset
697 return CALC_NDL;
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
698 /* exit the critical volume l */
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heinrichsweikamp
parents:
diff changeset
699 }
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 /* ASSIGN VARIABLES FOR ASCENT FROM START OF DECO ZONE TO FIRST STOP. SAVE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
703 /* FIRST STOP DEPTH FOR LATER USE WHEN COMPUTING THE FINAL ASCENT PROFILE */
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heinrichsweikamp
parents:
diff changeset
704 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
705 deco_stop_depth = fmaxf(deco_stop_depth,(float)pDiveSettings->last_stop_depth_bar * 10);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
706 starting_depth = depth_start_of_deco_calc;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
707 first_stop_depth = deco_stop_depth;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
708 first_stop = true;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
709 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
710 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
711 /* DECO STOP LOOP BLOCK WITHIN CRITICAL VOLUME LOOP */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
712 /* This loop computes a decompression schedule to the surface during each */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
713 /* iteration of the critical volume loop. No output is written from this */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
714 /* loop, rather it computes a schedule from which the in-water portion of the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
715 /* total phase volume time (Deco_Phase_Volume_Time) can be extracted. Also, */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
716 /* the gas loadings computed at the end of this loop are used the subroutine */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
717 /* which computes the out-of-water portion of the total phase volume time */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
718 /* (Surface_Phase_Volume_Time) for that schedule. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
719
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
720 /* 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
721 /* stop depth that is less than or equal to zero. A final deco stop less */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
722 /* than zero can happen when the user makes an odd step size change during */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
723 /* ascent - such as specifying a 5 msw step size change at the 3 msw stop! */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
724 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
725
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
726 while(true) /* loop will run continuous there is an break statement */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
727 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
728 if(starting_depth > deco_stop_depth )
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
729 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
730
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
731 first_stop = false;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
732 if (deco_stop_depth <= 0.0f)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
733 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
734 break;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
735 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
736 if (number_of_changes > 1)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
737 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
738 int i1 = number_of_changes;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
739 for (i = 2; i <= i1; ++i) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
740 if (depth_change[i - 1] >= deco_stop_depth)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
741 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
742 mix_number = mix_change[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
743 rate = rate_change[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
744 step_size = step_size_change[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
745 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
746 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
747 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
748 if(vpm_b)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
749 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
750 float fist_stop_depth2 = fmaxf(first_stop_depth,max_first_stop_depth);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
751 BOYLES_LAW_COMPENSATION(&fist_stop_depth2, &deco_stop_depth, &step_size);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
752 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
753 decompression_stop(&deco_stop_depth, &step_size, false);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
754 starting_depth = deco_stop_depth;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
755
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
756 if(deco_stop_depth == (float)pDiveSettings->last_stop_depth_bar * 10)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
757 deco_stop_depth = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
758 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
759 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
760 deco_stop_depth = deco_stop_depth - step_size;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
761 deco_stop_depth = fmaxf(deco_stop_depth,(float)pDiveSettings->last_stop_depth_bar * 10);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
762 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
763
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
764 count++;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
765 //if(count > 14)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
766 //return CALC_CRITICAL2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
767 /* L60: */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
768 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
769
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
770 return vpm_check_converged(calc_nulltime);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
771 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
772 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
773 /* COMPUTE TOTAL PHASE VOLUME TIME AND MAKE CRITICAL VOLUME COMPARISON */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
774 /* The deco phase volume time is computed from the run time. The surface */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
775 /* phase volume time is computed in a subroutine based on the surfacing gas */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
776 /* loadings from previous deco loop block. Next the total phase volume time */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
777 /* (in-water + surface) for each compartment is compared against the previous */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
778 /* total phase volume time. The schedule is converged when the difference is */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
779 /* less than or equal to 1 minute in any one of the 16 compartments. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
780
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
781 /* Note: the "phase volume time" is somewhat of a mathematical concept. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
782 /* It is the time divided out of a total integration of supersaturation */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
783 /* gradient x time (in-water and surface). This integration is multiplied */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
784 /* by the excess bubble number to represent the amount of free-gas released */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
785 /* as a result of allowing a certain number of excess bubbles to form. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
786 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
787 /* end of deco stop loop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
788
290
5e0bb91d4a12 VPM, cleanup: 1st round
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
diff changeset
789 static int vpm_check_converged(_Bool calc_nulltime)
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
790 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
791
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
792 short i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
793 float critical_volume_comparison;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
794 float r1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
795 _Bool schedule_converged = false;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
796
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
797
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
798 deco_phase_volume_time = run_time - run_time_start_of_deco_zone;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
799 calc_surface_phase_volume_time();
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
800
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
801 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
802 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
803 phase_volume_time[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
804 deco_phase_volume_time + surface_phase_volume_time[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
805 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
806
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
807 if (critical_volume_comparison <= 1.0f)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
808 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
809 schedule_converged = true;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
810 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
811 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
812
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
813 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
814 /* CRITICAL VOLUME DECISION TREE BETWEEN LINES 70 AND 99 */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
815 /* There are two options here. If the Critical Volume Agorithm setting is */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
816 /* "on" and the schedule is converged, or the Critical Volume Algorithm */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
817 /* setting was "off" in the first place, the program will re-assign variables */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
818 /* to their values at the start of ascent (end of bottom time) and process */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
819 /* a complete decompression schedule once again using all the same ascent */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
820 /* parameters and first stop depth. This decompression schedule will match */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
821 /* the last iteration of the Critical Volume Loop and the program will write */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
822 /* the final deco schedule to the output file. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
823
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
824 /* Note: if the Critical Volume Agorithm setting was "off", the final deco */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
825 /* schedule will be based on "Initial Allowable Supersaturation Gradients." */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
826 /* If it was "on", the final schedule will be based on "Adjusted Allowable */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
827 /* Supersaturation Gradients" (gradients that are "relaxed" as a result of */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
828 /* the Critical Volume Algorithm). */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
829
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
830 /* If the Critical Volume Agorithm setting is "on" and the schedule is not */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
831 /* converged, the program will re-assign variables to their values at the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
832 /* start of the deco zone and process another trial decompression schedule. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
833 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
834 /* L70: */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
835 //Not more than 4 iteration allowed
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
836 count_critical_volume_iteration++;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
837 if(count_critical_volume_iteration > 4)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
838 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
839 //return CALC_FINAL_DECO;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
840 if(calc_nulltime)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
841 return CALC_FINAL_DECO;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
842 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
843 return vpm_calc_final_deco(true);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
844 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
845 if (schedule_converged || critical_volume_algorithm_off)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
846 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
847
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
848 //return CALC_FINAL_DECO;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
849 if(calc_nulltime)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
850 return CALC_FINAL_DECO;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
851 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
852 return vpm_calc_final_deco(true);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
853 /* final deco schedule */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
854 /* exit critical volume l */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
855
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
856 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
857 /* IF SCHEDULE NOT CONVERGED, COMPUTE RELAXED ALLOWABLE SUPERSATURATION */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
858 /* GRADIENTS WITH VPM CRITICAL VOLUME ALGORITHM AND PROCESS ANOTHER */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
859 /* ITERATION OF THE CRITICAL VOLUME LOOP */
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 } else {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
863 critical_volume(&deco_phase_volume_time);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
864 deco_phase_volume_time = 0.;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
865 run_time = run_time_start_of_deco_calc;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
866 starting_depth = depth_start_of_deco_calc;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
867 mix_number = mix_change[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
868 rate = rate_change[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
869 step_size = step_size_change[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
870 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
871 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
872 last_phase_volume_time[i - 1] = phase_volume_time[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
873 helium_pressure[i - 1] = he_pressure_start_of_deco_zone[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
874 nitrogen_pressure[i - 1] = n2_pressure_start_of_deco_zone[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
875 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
876 if(calc_nulltime)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
877 return CALC_CRITICAL;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
878 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
879 return vpm_calc_critcal_volume(true, false);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
880 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
881 /* end of critical volume decision */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
882 /* L100: */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
883 // }/* end of critical vol loop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
884 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
885
290
5e0bb91d4a12 VPM, cleanup: 1st round
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
diff changeset
886 static void vpm_calc_deco_ceiling(void)
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
887 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
888
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
889 short i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
890 // hw 1601209 float r1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
891 // hw 1601209 float stop_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
892 // hw 1601209 int count = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
893 //static int dp_max;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
894 //static float surfacetime;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
895 // _Bool first_stop = false;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
896 float tissue_He_saturation[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
897 float tissue_N2_saturation[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
898 float vpm_buehlmann_safety_gradient = 1.0f - (((float)pDiveSettings->vpm_conservatism) / 40);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
899 //max_first_stop_depth = fmaxf(first_stop_depth,max_first_stop_depth);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
900
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
901 /** CALC DECO Ceiling ******************************************************************/
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
902 /** Not when Future stops */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
903 if(vpm_calc_what == DECOSTOPS)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
904 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
905
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
906 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
907 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
908 helium_pressure[i - 1] = he_pressure_start_of_deco_zone[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
909 nitrogen_pressure[i - 1] = n2_pressure_start_of_deco_zone[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
910 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
911 run_time = run_time_start_of_ascent;// run_time_start_of_ascent;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
912 starting_depth = depth_change[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
913 mix_number = mix_change[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
914 rate = rate_change[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
915 //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
916
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
917 float deco_ceiling_depth = 0.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
918 if(depth_start_of_deco_calc > max_deco_ceiling_depth)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
919 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
920 calc_deco_ceiling(&deco_ceiling_depth, true);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
921 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
922 if(buehlmannSafety)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
923 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
924 for (i = 0; i < 16; i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
925 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
926 tissue_He_saturation[i] = helium_pressure[i] / 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
927 tissue_N2_saturation[i] = nitrogen_pressure[i] / 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
928 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
929
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
930 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
931 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
932
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
933 vpm_violates_buehlmann = true;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
934 do {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
935 deco_ceiling_depth += 0.1f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
936 } 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
937 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
938 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
939
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
940 if (deco_ceiling_depth < depth_start_of_deco_calc)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
941 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
942 projected_ascent(&depth_start_of_deco_calc, &rate, &deco_ceiling_depth, &step_size);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
943 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
944
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
945 max_deco_ceiling_depth = fmaxf(max_deco_ceiling_depth,deco_ceiling_depth);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
946
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
947 if(depth_start_of_deco_calc > deco_ceiling_depth)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
948 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
949 gas_loadings_ascent_descen(helium_pressure,nitrogen_pressure, depth_start_of_deco_calc,deco_ceiling_depth, rate, true);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
950 //surfacetime += segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
951 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
952
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
953 if(vpm_b)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
954 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
955 BOYLES_LAW_COMPENSATION(&max_deco_ceiling_depth, &deco_ceiling_depth, &step_size);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
956 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
957 calc_deco_ceiling(&deco_ceiling_depth, false);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
958
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
959 // buehlmann safety
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
960 if(vpm_violates_buehlmann)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
961 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
962 for (i = 0; i < 16; i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
963 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
964 tissue_He_saturation[i] = helium_pressure[i] / 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
965 tissue_N2_saturation[i] = nitrogen_pressure[i] / 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
966 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
967
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
968 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
969 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
970
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
971 vpm_violates_buehlmann = true;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
972 do {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
973 deco_ceiling_depth += 0.1f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
974 } 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
975 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
976 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
977 // output_ceiling_meter
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
978 if(deco_ceiling_depth > first_stop_depth)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
979 deco_ceiling_depth = first_stop_depth;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
980 pDecoInfo->output_ceiling_meter = deco_ceiling_depth ;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
981 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
982 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
983 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
984 pDecoInfo->output_ceiling_meter = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
985 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
986
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
987 // fix hw 160627
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
988 if(pDecoInfo->output_ceiling_meter < 0)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
989 pDecoInfo->output_ceiling_meter = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
990
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
991 /*** End CALC ceiling ***************************************************/
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
992 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
993
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
994
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
995 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
996 /* DECO STOP LOOP BLOCK FOR FINAL DECOMPRESSION SCHEDULE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
997 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
998
290
5e0bb91d4a12 VPM, cleanup: 1st round
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
diff changeset
999 static int vpm_calc_final_deco(_Bool begin)
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1000 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1001 short i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1002 float r1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1003 float stop_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1004 int count = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1005 static int dp_max;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1006 static float surfacetime;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1007 _Bool first_stop = false;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1008 max_first_stop_depth = fmaxf(first_stop_depth,max_first_stop_depth);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1009 if(begin)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1010 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1011 gCNS_VPM = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1012 dp_max = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1013 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1014 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1015 helium_pressure[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1016 he_pressure_start_of_ascent[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1017 nitrogen_pressure[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1018 n2_pressure_start_of_ascent[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1019 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1020 run_time = run_time_start_of_ascent;// run_time_start_of_ascent;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1021 starting_depth = depth_change[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1022 mix_number = mix_change[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1023 rate = rate_change[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1024 step_size = step_size_change[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1025 deco_stop_depth = first_stop_depth;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1026 max_first_stop_depth = fmaxf(first_stop_depth,max_first_stop_depth);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1027 last_run_time = 0.;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1028
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 /* DECO STOP LOOP BLOCK FOR FINAL DECOMPRESSION SCHEDULE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1033 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1034 surfacetime = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1035 first_stop = true;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1036 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1037
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1038 while(true) /* loop will run continuous until there is an break statement */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1039 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1040 if(starting_depth > deco_stop_depth)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1041 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1042 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
1043 surfacetime += segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1044 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1045
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1046 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1047 /* DURING FINAL DECOMPRESSION SCHEDULE PROCESS, COMPUTE MAXIMUM ACTUAL */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1048 /* SUPERSATURATION GRADIENT RESULTING IN EACH COMPARTMENT */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1049 /* If there is a repetitive dive, this will be used later in the VPM */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1050 /* Repetitive Algorithm to adjust the values for critical radii. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1051 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1052 if(vpm_calc_what == DECOSTOPS)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1053 calc_max_actual_gradient(&deco_stop_depth);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1054
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1055 if (deco_stop_depth <= 0.0f) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1056 break;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1057 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1058 if (number_of_changes > 1)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1059 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1060 int i1 = number_of_changes;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1061 for (i = 2; i <= i1; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1062 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1063 if (depth_change[i - 1] >= deco_stop_depth)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1064 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1065 mix_number = mix_change[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1066 rate = rate_change[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1067 step_size = step_size_change[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1068 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1069 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1070 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1071
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1072 if(first_stop)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1073 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1074 run_time_first_stop = run_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1075 first_stop = false;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1076 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1077 if(vpm_b)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1078 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1079 BOYLES_LAW_COMPENSATION(&max_first_stop_depth, &deco_stop_depth, &step_size);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1080 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1081 decompression_stop(&deco_stop_depth, &step_size, true);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1082
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1083 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1084 /* 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
1085 /* whole increments of the minimum stop time (to make for a nice deco table). */
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 if (last_run_time == 0.0f)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1089 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1090 r1 = segment_time / minimum_deco_stop_time + 0.5f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1091 stop_time = r_int(&r1) * minimum_deco_stop_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1092 } else {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1093 stop_time = run_time - last_run_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1094 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1095 stop_time = segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1096 surfacetime += stop_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1097 if((vpm_calc_what == DECOSTOPS) || (vpm_calc_what == BAILOUTSTOPS))
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1098 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1099 int dp = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1100 if(deco_stop_depth == (float)pDiveSettings->last_stop_depth_bar * 10)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1101 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1102 dp = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1103 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1104 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1105 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1106 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
1107 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1108 dp_max = (int)fmaxf(dp_max,dp);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1109 if(dp < DECOINFO_STRUCT_MAX_STOPS)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1110 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1111 int stop_time_seconds = fminf((999 * 60), (int)(stop_time *60));
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1112 //
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1113
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1114 //if(vpm_calc_what == DECOSTOPS)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1115 pDecoInfo->output_stop_length_seconds[dp] = (unsigned short)stop_time_seconds;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1116 //else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1117 //decostop_bailout[dp] = (unsigned short)stop_time_seconds;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1118 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1119 }
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 /* DURING FINAL DECOMPRESSION SCHEDULE, IF MINIMUM STOP TIME PARAMETER IS A */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1124 /* WHOLE NUMBER (i.e. 1 minute) THEN WRITE DECO SCHEDULE USING short */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1125 /* NUMBERS (looks nicer). OTHERWISE, USE DECIMAL NUMBERS. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1126 /* Note: per the request of a noted exploration diver(!), program now allows */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1127 /* a minimum stop time of less than one minute so that total ascent time can */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1128 /* 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
1129 /* 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
1130 /* continuous decompression schedule can be computed. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1131 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1132
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1133 starting_depth = deco_stop_depth;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1134 if(deco_stop_depth == (float)pDiveSettings->last_stop_depth_bar * 10)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1135 deco_stop_depth = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1136 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1137 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1138 deco_stop_depth = deco_stop_depth - step_size;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1139 deco_stop_depth = fmaxf(deco_stop_depth,(float)pDiveSettings->last_stop_depth_bar * 10);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1140 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1141
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1142 last_run_time = run_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1143 count++;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1144 //if(count > 14)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1145 //return CALC_FINAL_DECO2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1146 /* L80: */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1147 } /* for final deco sche */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1148
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1149 if( (vpm_calc_what == DECOSTOPS) || (vpm_calc_what == BAILOUTSTOPS))
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1150 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1151 for(int dp = dp_max +1;dp < DECOINFO_STRUCT_MAX_STOPS;dp++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1152 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1153 //if(vpm_calc_what == DECOSTOPS)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1154 pDecoInfo->output_stop_length_seconds[dp] = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1155 //else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1156 //decostop_bailout[dp] = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1157 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1158 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1159 pDecoInfo->output_time_to_surface_seconds = (int)(surfacetime * 60);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1160 pDecoInfo->output_ndl_seconds = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1161
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1162 vpm_calc_deco_ceiling();
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1163 /* end of deco stop lo */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1164 return CALC_END;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1165 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1166
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1167 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1168 /* SUBROUTINE NUCLEAR_REGENERATION */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1169 /* Purpose: This subprogram calculates the regeneration of VPM critical */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1170 /* radii that takes place over the dive time. The regeneration time constant */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1171 /* 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
1172 /* normal length, but will have a major impact for saturation dives. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1173 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1174
290
5e0bb91d4a12 VPM, cleanup: 1st round
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
diff changeset
1175 static int nuclear_regeneration(float *dive_time)
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1176 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1177 /* Local variables */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1178 float crush_pressure_adjust_ratio_he,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1179 ending_radius_n2,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1180 ending_radius_he;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1181 short i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1182 float crushing_pressure_pascals_n2,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1183 crushing_pressure_pascals_he,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1184 adj_crush_pressure_n2_pascals,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1185 adj_crush_pressure_he_pascals,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1186 crush_pressure_adjust_ratio_n2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1187
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1188 /* loop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1189 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1190 /* CALCULATIONS */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1191 /* First convert the maximum crushing pressure obtained for each compartment */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1192 /* to Pascals. Next, compute the ending radius for helium and nitrogen */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1193 /* critical nuclei in each compartment. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1194 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1195
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1196 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1197 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1198 crushing_pressure_pascals_he =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1199 pVpm->max_crushing_pressure_he[i - 1] / UNITS_FACTOR * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1200 crushing_pressure_pascals_n2 =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1201 pVpm->max_crushing_pressure_n2[i - 1] / UNITS_FACTOR * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1202 ending_radius_he =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1203 1.0f / (crushing_pressure_pascals_he /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1204 ((SKIN_COMPRESSION_GAMMAC - SURFACE_TENSION_GAMMA) * 2.0f) +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1205 1.0f / pVpm->adjusted_critical_radius_he[i - 1]);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1206 ending_radius_n2 =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1207 1.0f / (crushing_pressure_pascals_n2 /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1208 ((SKIN_COMPRESSION_GAMMAC - SURFACE_TENSION_GAMMA) * 2.0f) +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1209 1.0f / pVpm->adjusted_critical_radius_n2[i - 1]);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1210
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heinrichsweikamp
parents:
diff changeset
1211 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1212 /* A "regenerated" radius for each nucleus is now calculated based on the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1213 /* regeneration time constant. This means that after application of */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1214 /* crushing pressure and reduction in radius, a nucleus will slowly grow */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1215 /* back to its original initial radius over a period of time. This */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1216 /* phenomenon is probabilistic in nature and depends on absolute temperature. */
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heinrichsweikamp
parents:
diff changeset
1217 /* It is independent of crushing pressure. */
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heinrichsweikamp
parents:
diff changeset
1218 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
1219
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heinrichsweikamp
parents:
diff changeset
1220 regenerated_radius_he[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1221 pVpm->adjusted_critical_radius_he[i - 1] +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1222 (ending_radius_he - pVpm->adjusted_critical_radius_he[i - 1]) *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1223 expf(-(*dive_time) / REGENERATION_TIME_CONSTANT);
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heinrichsweikamp
parents:
diff changeset
1224 regenerated_radius_n2[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1225 pVpm->adjusted_critical_radius_n2[i - 1] +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1226 (ending_radius_n2 - pVpm->adjusted_critical_radius_n2[i - 1]) *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1227 expf(-(*dive_time) / REGENERATION_TIME_CONSTANT);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1228
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heinrichsweikamp
parents:
diff changeset
1229 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1230 /* In order to preserve reference back to the initial critical radii after */
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heinrichsweikamp
parents:
diff changeset
1231 /* regeneration, an "adjusted crushing pressure" for the nuclei in each */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1232 /* compartment must be computed. In other words, this is the value of */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1233 /* crushing pressure that would have reduced the original nucleus to the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1234 /* to the present radius had regeneration not taken place. The ratio */
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heinrichsweikamp
parents:
diff changeset
1235 /* for adjusting crushing pressure is obtained from algebraic manipulation */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1236 /* of the standard VPM equations. The adjusted crushing pressure, in lieu */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1237 /* of the original crushing pressure, is then applied in the VPM Critical */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1238 /* Volume Algorithm and the VPM Repetitive Algorithm. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1239 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1240
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heinrichsweikamp
parents:
diff changeset
1241 crush_pressure_adjust_ratio_he =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1242 ending_radius_he * (pVpm->adjusted_critical_radius_he[i - 1] -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1243 regenerated_radius_he[i - 1]) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1244 (regenerated_radius_he[i - 1] *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1245 (pVpm->adjusted_critical_radius_he[i - 1] -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1246 ending_radius_he));
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heinrichsweikamp
parents:
diff changeset
1247 crush_pressure_adjust_ratio_n2 =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1248 ending_radius_n2 * (pVpm->adjusted_critical_radius_n2[i - 1] -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1249 regenerated_radius_n2[i - 1]) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1250 (regenerated_radius_n2[i - 1] *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1251 (pVpm->adjusted_critical_radius_n2[i - 1] -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1252 ending_radius_n2));
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1253 adj_crush_pressure_he_pascals =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1254 crushing_pressure_pascals_he * crush_pressure_adjust_ratio_he;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1255 adj_crush_pressure_n2_pascals =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1256 crushing_pressure_pascals_n2 * crush_pressure_adjust_ratio_n2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1257 pVpm->adjusted_crushing_pressure_he[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1258 adj_crush_pressure_he_pascals / 101325.0f * UNITS_FACTOR;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1259 pVpm->adjusted_crushing_pressure_n2[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1260 adj_crush_pressure_n2_pascals / 101325.0f * UNITS_FACTOR;
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heinrichsweikamp
parents:
diff changeset
1261 }
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heinrichsweikamp
parents:
diff changeset
1262 return 0;
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heinrichsweikamp
parents:
diff changeset
1263 } /* nuclear_regeneration */
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heinrichsweikamp
parents:
diff changeset
1264
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heinrichsweikamp
parents:
diff changeset
1265 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1266 /* SUBROUTINE CALC_INITIAL_ALLOWABLE_GRADIENT */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1267 /* Purpose: This subprogram calculates the initial allowable gradients for */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1268 /* helium and nitrogren in each compartment. These are the gradients that */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1269 /* will be used to set the deco ceiling on the first pass through the deco */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1270 /* loop. If the Critical Volume Algorithm is set to "off", then these */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1271 /* gradients will determine the final deco schedule. Otherwise, if the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1272 /* Critical Volume Algorithm is set to "on", these gradients will be further */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1273 /* "relaxed" by the Critical Volume Algorithm subroutine. The initial */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1274 /* allowable gradients are referred to as "PssMin" in the papers by Yount */
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heinrichsweikamp
parents:
diff changeset
1275 /* and colleauges, i.e., the minimum supersaturation pressure gradients */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1276 /* that will probe bubble formation in the VPM nuclei that started with the */
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heinrichsweikamp
parents:
diff changeset
1277 /* designated minimum initial radius (critical radius). */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1278
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heinrichsweikamp
parents:
diff changeset
1279 /* The initial allowable gradients are computed directly from the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1280 /* "regenerated" radii after the Nuclear Regeneration subroutine. These */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1281 /* gradients are tracked separately for helium and nitrogen. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1282 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1283
290
5e0bb91d4a12 VPM, cleanup: 1st round
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
diff changeset
1284 static int calc_initial_allowable_gradient()
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1285 {
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heinrichsweikamp
parents:
diff changeset
1286 float initial_allowable_grad_n2_pa,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1287 initial_allowable_grad_he_pa;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1288 short i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1289
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1290 /* loop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1291 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1292 /* CALCULATIONS */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1293 /* The initial allowable gradients are computed in Pascals and then converted */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1294 /* to the diving pressure units. Two different sets of arrays are used to */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1295 /* save the calculations - Initial Allowable Gradients and Allowable */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1296 /* Gradients. The Allowable Gradients are assigned the values from Initial */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1297 /* Allowable Gradients however the Allowable Gradients can be changed later */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1298 /* by the Critical Volume subroutine. The values for the Initial Allowable */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1299 /* Gradients are saved in a global array for later use by both the Critical */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1300 /* Volume subroutine and the VPM Repetitive Algorithm subroutine. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1301 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1302
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1303 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1304 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1305 initial_allowable_grad_n2_pa =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1306 SURFACE_TENSION_GAMMA * 2.0f *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1307 (SKIN_COMPRESSION_GAMMAC - SURFACE_TENSION_GAMMA) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1308 (regenerated_radius_n2[i - 1] * SKIN_COMPRESSION_GAMMAC);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1309
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1310 initial_allowable_grad_he_pa =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1311 SURFACE_TENSION_GAMMA * 2.0f *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1312 (SKIN_COMPRESSION_GAMMAC - SURFACE_TENSION_GAMMA) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1313 (regenerated_radius_he[i - 1] * SKIN_COMPRESSION_GAMMAC);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1314
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1315 pVpm->initial_allowable_gradient_n2[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1316 initial_allowable_grad_n2_pa / 101325.0f * UNITS_FACTOR;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1317
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1318 pVpm->initial_allowable_gradient_he[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1319 initial_allowable_grad_he_pa / 101325.0f * UNITS_FACTOR;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1320
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1321 allowable_gradient_he[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1322 pVpm->initial_allowable_gradient_he[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1323
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1324 allowable_gradient_n2[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1325 pVpm->initial_allowable_gradient_n2[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1326 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1327 return 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1328 } /* calc_initial_allowable_gradient */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1329
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1330 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1331 /* SUBROUTINE CALC_DECO_CEILING */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1332 /* Purpose: This subprogram calculates the deco ceiling (the safe ascent */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1333 /* depth) in each compartment, based on the allowable gradients, and then */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1334 /* finds the deepest deco ceiling across all compartments. This deepest */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1335 /* value (Deco Ceiling Depth) is then used by the Decompression Stop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1336 /* subroutine to determine the actual deco schedule. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1337 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1338
290
5e0bb91d4a12 VPM, cleanup: 1st round
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
diff changeset
1339 static int calc_deco_ceiling(float *deco_ceiling_depth,_Bool fallowable)
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1340 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1341 /* System generated locals */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1342 float r1, r2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1343 /* Local variables */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1344 float weighted_allowable_gradient;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1345 short i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1346 float compartment_deco_ceiling[16],
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1347 gas_loading,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1348 tolerated_ambient_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1349 float gradient_he, gradient_n2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1350
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1351 if(!vpm_b)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1352 fallowable = true;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1353 /* loop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1354 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1355 /* CALCULATIONS */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1356 /* Since there are two sets of allowable gradients being tracked, one for */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1357 /* helium and one for nitrogen, a "weighted allowable gradient" must be */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1358 /* computed each time based on the proportions of helium and nitrogen in */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1359 /* each compartment. This proportioning follows the methodology of */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1360 /* Buhlmann/Keller. If there is no helium and nitrogen in the compartment, */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1361 /* such as after extended periods of oxygen breathing, then the minimum value */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1362 /* across both gases will be used. It is important to note that if a */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1363 /* compartment is empty of helium and nitrogen, then the weighted allowable */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1364 /* gradient formula cannot be used since it will result in division by zero. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1365 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1366
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1367 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1368 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1369
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1370 // abfrage raus und pointer stattdessen
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1371 if(fallowable){
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1372 gradient_he = allowable_gradient_he[i-1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1373 gradient_n2 = allowable_gradient_n2[i-1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1374 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1375 else{
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1376 gradient_he = deco_gradient_he[i-1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1377 gradient_n2 = deco_gradient_n2[i-1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1378 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1379
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1380 gas_loading = helium_pressure[i - 1] + nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1381
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1382 if (gas_loading > 0)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1383 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1384 weighted_allowable_gradient =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1385 (gradient_he * helium_pressure[i - 1] +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1386 gradient_n2 * nitrogen_pressure[i - 1]) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1387 (helium_pressure[i - 1] + nitrogen_pressure[i - 1]);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1388
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1389 tolerated_ambient_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1390 gas_loading +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1391 CONSTANT_PRESSURE_OTHER_GASES -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1392 weighted_allowable_gradient;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1393 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1394 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1395 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1396 /* Computing MIN */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1397 r1 = gradient_he;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1398 r2 = gradient_n2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1399 weighted_allowable_gradient = fminf(r1,r2);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1400
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1401 tolerated_ambient_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1402 CONSTANT_PRESSURE_OTHER_GASES - weighted_allowable_gradient;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1403 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1404
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1405 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1406 /* The tolerated ambient pressure cannot be less than zero absolute, i.e., */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1407 /* the vacuum of outer space! */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1408 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1409
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1410 if (tolerated_ambient_pressure < 0) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1411 tolerated_ambient_pressure = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1412 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1413 compartment_deco_ceiling[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1414 tolerated_ambient_pressure - barometric_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1415 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1416
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1417 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1418 /* The Deco Ceiling Depth is computed in a loop after all of the individual */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1419 /* compartment deco ceilings have been calculated. It is important that the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1420 /* Deco Ceiling Depth (max deco ceiling across all compartments) only be */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1421 /* extracted from the compartment values and not be compared against some */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1422 /* initialization value. For example, if MAX(Deco_Ceiling_Depth . .) was */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1423 /* compared against zero, this could cause a program lockup because sometimes */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1424 /* the Deco Ceiling Depth needs to be negative (but not less than zero */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1425 /* absolute ambient pressure) in order to decompress to the last stop at zero */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1426 /* depth. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1427 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1428
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1429 *deco_ceiling_depth = compartment_deco_ceiling[0];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1430 for (i = 2; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1431 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1432 /* Computing MAX */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1433 r1 = *deco_ceiling_depth;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1434 r2 = compartment_deco_ceiling[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1435 *deco_ceiling_depth = fmaxf(r1,r2);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1436 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1437 return 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1438 } /* calc_deco_ceiling */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1439
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1440
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1441
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1442 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1443 /* SUBROUTINE CALC_MAX_ACTUAL_GRADIENT */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1444 /* Purpose: This subprogram calculates the actual supersaturation gradient */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1445 /* obtained in each compartment as a result of the ascent profile during */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1446 /* decompression. Similar to the concept with crushing pressure, the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1447 /* supersaturation gradients are not cumulative over a multi-level, staged */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1448 /* ascent. Rather, it will be the maximum value obtained in any one discrete */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1449 /* step of the overall ascent. Thus, the program must compute and store the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1450 /* maximum actual gradient for each compartment that was obtained across all */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1451 /* steps of the ascent profile. This subroutine is invoked on the last pass */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1452 /* through the deco stop loop block when the final deco schedule is being */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1453 /* generated. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1454 /* */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1455 /* The max actual gradients are later used by the VPM Repetitive Algorithm to */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1456 /* determine if adjustments to the critical radii are required. If the max */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1457 /* actual gradient did not exceed the initial alllowable gradient, then no */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1458 /* adjustment will be made. However, if the max actual gradient did exceed */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1459 /* the intitial allowable gradient, such as permitted by the Critical Volume */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1460 /* Algorithm, then the critical radius will be adjusted (made larger) on the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1461 /* repetitive dive to compensate for the bubbling that was allowed on the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1462 /* previous dive. The use of the max actual gradients is intended to prevent */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1463 /* the repetitive algorithm from being overly conservative. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1464 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1465
290
5e0bb91d4a12 VPM, cleanup: 1st round
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
diff changeset
1466 static int calc_max_actual_gradient(float *deco_stop_depth)
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1467 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1468 /* System generated locals */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1469 float r1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1470
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1471 /* Local variables */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1472 short i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1473 float compartment_gradient;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1474
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1475 /* loop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1476 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1477 /* CALCULATIONS */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1478 /* Note: negative supersaturation gradients are meaningless for this */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1479 /* application, so the values must be equal to or greater than zero. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1480 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1481
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1482 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1483 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1484 compartment_gradient =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1485 helium_pressure[i - 1] +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1486 nitrogen_pressure[i - 1] +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1487 CONSTANT_PRESSURE_OTHER_GASES -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1488 (*deco_stop_depth + barometric_pressure);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1489 if (compartment_gradient <= 0.0f) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1490 compartment_gradient = 0.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1491 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1492 /* Computing MAX */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1493 r1 = pVpm->max_actual_gradient[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1494 pVpm->max_actual_gradient[i - 1] = fmaxf(r1, compartment_gradient);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1495 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1496 return 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1497 } /* calc_max_actual_gradient */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1498
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1499 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1500 /* SUBROUTINE CALC_SURFACE_PHASE_VOLUME_TIME */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1501 /* Purpose: This subprogram computes the surface portion of the total phase */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1502 /* volume time. This is the time factored out of the integration of */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1503 /* supersaturation gradient x time over the surface interval. The VPM */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1504 /* considers the gradients that allow bubbles to form or to drive bubble */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1505 /* growth both in the water and on the surface after the dive. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1506
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1507 /* This subroutine is a new development to the VPM algorithm in that it */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1508 /* computes the time course of supersaturation gradients on the surface */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1509 /* when both helium and nitrogen are present. Refer to separate write-up */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1510 /* for a more detailed explanation of this algorithm. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1511 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1512
290
5e0bb91d4a12 VPM, cleanup: 1st round
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
diff changeset
1513 static int calc_surface_phase_volume_time()
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1514 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1515 /* Local variables */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1516 float decay_time_to_zero_gradient;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1517 short i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1518 float integral_gradient_x_time,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1519 surface_inspired_n2_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1520
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1521 /* loop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1522 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1523 /* CALCULATIONS */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1524 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1525
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1526 surface_inspired_n2_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1527 (barometric_pressure - WATER_VAPOR_PRESSURE) * 0.79f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1528 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1529 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1530 if (nitrogen_pressure[i - 1] > surface_inspired_n2_pressure)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1531 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1532 surface_phase_volume_time[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1533 (helium_pressure[i - 1] / HELIUM_TIME_CONSTANT[i - 1] +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1534 (nitrogen_pressure[i - 1] - surface_inspired_n2_pressure) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1535 NITROGEN_TIME_CONSTANT[i - 1]) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1536 (helium_pressure[i - 1] + nitrogen_pressure[i - 1] -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1537 surface_inspired_n2_pressure);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1538 } else if (nitrogen_pressure[i - 1] <= surface_inspired_n2_pressure &&
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1539 helium_pressure[i - 1] + nitrogen_pressure[i - 1] >= surface_inspired_n2_pressure)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1540 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1541 decay_time_to_zero_gradient =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1542 1.0f / (NITROGEN_TIME_CONSTANT[i - 1] - HELIUM_TIME_CONSTANT[i - 1]) *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1543 log((surface_inspired_n2_pressure - nitrogen_pressure[i - 1]) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1544 helium_pressure[i - 1]);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1545 integral_gradient_x_time =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1546 helium_pressure[i - 1] /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1547 HELIUM_TIME_CONSTANT[i - 1] *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1548 (1.0f - expf(-HELIUM_TIME_CONSTANT[i - 1] *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1549 decay_time_to_zero_gradient)) +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1550 (nitrogen_pressure[i - 1] - surface_inspired_n2_pressure) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1551 NITROGEN_TIME_CONSTANT[i - 1] *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1552 (1.0f - expf(-NITROGEN_TIME_CONSTANT[i - 1] *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1553 decay_time_to_zero_gradient));
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1554 surface_phase_volume_time[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1555 integral_gradient_x_time /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1556 (helium_pressure[i - 1] +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1557 nitrogen_pressure[i - 1] -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1558 surface_inspired_n2_pressure);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1559 } else {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1560 surface_phase_volume_time[i - 1] = 0.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1561 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1562 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1563 return 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1564 } /* calc_surface_phase_volume_time */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1565
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1566 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1567 /* SUBROUTINE CRITICAL_VOLUME */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1568 /* Purpose: This subprogram applies the VPM Critical Volume Algorithm. This */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1569 /* algorithm will compute "relaxed" gradients for helium and nitrogen based */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1570 /* on the setting of the Critical Volume Parameter Lambda. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1571 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1572
290
5e0bb91d4a12 VPM, cleanup: 1st round
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
diff changeset
1573 static int critical_volume(float *deco_phase_volume_time)
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1574 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1575 /* System generated locals */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1576 float r1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1577
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1578 /* Local variables */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1579 float initial_allowable_grad_n2_pa,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1580 initial_allowable_grad_he_pa,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1581 parameter_lambda_pascals, b,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1582 c;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1583 short i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1584 float new_allowable_grad_n2_pascals,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1585 phase_volume_time[16],
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1586 new_allowable_grad_he_pascals,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1587 adj_crush_pressure_n2_pascals,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1588 adj_crush_pressure_he_pascals;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1589
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1590 /* loop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1591 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1592 /* CALCULATIONS */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1593 /* Note: Since the Critical Volume Parameter Lambda was defined in units of */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1594 /* fsw-min in the original papers by Yount and colleauges, the same */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1595 /* convention is retained here. Although Lambda is adjustable only in units */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1596 /* of fsw-min in the program settings (range from 6500 to 8300 with default */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1597 /* 7500), it will convert to the proper value in Pascals-min in this */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1598 /* subroutine regardless of which diving pressure units are being used in */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1599 /* the main program - feet of seawater (fsw) or meters of seawater (msw). */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1600 /* The allowable gradient is computed using the quadratic formula (refer to */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1601 /* separate write-up posted on the Deco List web site). */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1602 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1603
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1604 /**
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1605 ******************************************************************************
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1606 * @brief critical_volume comment by hw
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1607 * @version V0.0.1
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1608 * @date 19-April-2014
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1609 * @retval global: allowable_gradient_he[i], allowable_gradient_n2[i]
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1610 ******************************************************************************
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1611 */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1612
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1613 parameter_lambda_pascals =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1614 CRIT_VOLUME_PARAMETER_LAMBDA / 33.0f * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1615 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1616 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1617 phase_volume_time[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1618 *deco_phase_volume_time + surface_phase_volume_time[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1619 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1620 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1621 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1622
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1623 adj_crush_pressure_he_pascals =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1624 pVpm->adjusted_crushing_pressure_he[i - 1] / UNITS_FACTOR * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1625
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1626 initial_allowable_grad_he_pa =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1627 pVpm->initial_allowable_gradient_he[i - 1] / UNITS_FACTOR * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1628
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1629 b = initial_allowable_grad_he_pa + parameter_lambda_pascals *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1630 SURFACE_TENSION_GAMMA / (
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1631 SKIN_COMPRESSION_GAMMAC * phase_volume_time[i - 1]);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1632
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1633 c = SURFACE_TENSION_GAMMA * (
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1634 SURFACE_TENSION_GAMMA * (
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1635 parameter_lambda_pascals * adj_crush_pressure_he_pascals)) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1636 (SKIN_COMPRESSION_GAMMAC *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1637 (SKIN_COMPRESSION_GAMMAC * phase_volume_time[i - 1]));
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1638 /* Computing 2nd power */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1639
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1640 r1 = b;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1641
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1642 new_allowable_grad_he_pascals =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1643 (b + sqrtf(r1 * r1 - c * 4.0f)) / 2.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1644
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1645 /* modify global variable */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1646 allowable_gradient_he[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1647 new_allowable_grad_he_pascals / 101325.0f * UNITS_FACTOR;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1648 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1649
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1650 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1651 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1652 adj_crush_pressure_n2_pascals =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1653 pVpm->adjusted_crushing_pressure_n2[i - 1] / UNITS_FACTOR * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1654
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1655 initial_allowable_grad_n2_pa =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1656 pVpm->initial_allowable_gradient_n2[i - 1] / UNITS_FACTOR * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1657
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1658 b = initial_allowable_grad_n2_pa + parameter_lambda_pascals *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1659 SURFACE_TENSION_GAMMA / (
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1660 SKIN_COMPRESSION_GAMMAC * phase_volume_time[i - 1]);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1661
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1662 c = SURFACE_TENSION_GAMMA *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1663 (SURFACE_TENSION_GAMMA *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1664 (parameter_lambda_pascals * adj_crush_pressure_n2_pascals)) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1665 (SKIN_COMPRESSION_GAMMAC *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1666 (SKIN_COMPRESSION_GAMMAC * phase_volume_time[i - 1]));
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1667 /* Computing 2nd power */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1668
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1669 r1 = b;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1670
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1671 new_allowable_grad_n2_pascals =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1672 (b + sqrtf(r1 * r1 - c * 4.0f)) / 2.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1673
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1674 /* modify global variable */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1675 allowable_gradient_n2[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1676 new_allowable_grad_n2_pascals / 101325.0f * UNITS_FACTOR;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1677 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1678 return 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1679 } /* critical_volume */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1680
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1681 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1682 /* SUBROUTINE CALC_START_OF_DECO_ZONE */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1683 /* Purpose: This subroutine uses the Bisection Method to find the depth at */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1684 /* which the leading compartment just enters the decompression zone. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1685 /* Source: "Numerical Recipes in Fortran 77", Cambridge University Press, */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1686 /* 1992. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1687 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1688
290
5e0bb91d4a12 VPM, cleanup: 1st round
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
diff changeset
1689 static int calc_start_of_deco_zone(float *starting_depth,
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1690 float *rate,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1691 float *depth_start_of_deco_zone)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1692 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1693 /* Local variables */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1694 float last_diff_change,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1695 initial_helium_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1696 mid_range_nitrogen_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1697 short i, j;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1698 float initial_inspired_n2_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1699 cpt_depth_start_of_deco_zone,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1700 low_bound,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1701 initial_inspired_he_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1702 high_bound_nitrogen_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1703 nitrogen_rate,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1704 function_at_mid_range,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1705 function_at_low_bound,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1706 high_bound,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1707 mid_range_helium_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1708 mid_range_time,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1709 starting_ambient_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1710 initial_nitrogen_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1711 function_at_high_bound;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1712
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1713 float time_to_start_of_deco_zone,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1714 high_bound_helium_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1715 helium_rate,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1716 differential_change;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1717 float fraction_helium_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1718 float fraction_helium_end;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1719 float fraction_nitrogen_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1720 float fraction_nitrogen_end;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1721 float ending_ambient_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1722 float time_test;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1723
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1724
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1725 /* loop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1726 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1727 /* CALCULATIONS */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1728 /* First initialize some variables */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1729 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1730
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1731 *depth_start_of_deco_zone = 0.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1732 starting_ambient_pressure = *starting_depth + barometric_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1733
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1734 //>>>>>>>>>>>>>>>>>>>>
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1735 //Test depth to calculate helium_rate and nitrogen_rate
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1736 ending_ambient_pressure = starting_ambient_pressure/2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1737
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1738 time_test = (ending_ambient_pressure - starting_ambient_pressure) / *rate;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1739 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
1740 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
1741 initial_inspired_he_pressure = (starting_ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_helium_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1742 initial_inspired_n2_pressure = (starting_ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_nitrogen_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1743 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
1744 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
1745 //>>>>>>>>>>>>>>>>>>>>>
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1746 /*initial_inspired_he_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1747 (starting_ambient_pressure - water_vapor_pressure) *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1748 fraction_helium[mix_number - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1749 initial_inspired_n2_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1750 (starting_ambient_pressure - water_vapor_pressure) *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1751 fraction_nitrogen[mix_number - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1752 helium_rate = *rate * fraction_helium[mix_number - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1753 nitrogen_rate = *rate * fraction_nitrogen[mix_number - 1];*/
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1754
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1755 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1756 /* ESTABLISH THE BOUNDS FOR THE ROOT SEARCH USING THE BISECTION METHOD */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1757 /* AND CHECK TO MAKE SURE THAT THE ROOT WILL BE WITHIN BOUNDS. PROCESS */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1758 /* EACH COMPARTMENT INDIVIDUALLY AND FIND THE MAXIMUM DEPTH ACROSS ALL */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1759 /* COMPARTMENTS (LEADING COMPARTMENT) */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1760 /* In this case, we are solving for time - the time when the gas tension in */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1761 /* the compartment will be equal to ambient pressure. The low bound for time */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1762 /* 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
1763 /* ascend to zero ambient pressure (absolute). Since the ascent rate is */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1764 /* negative, a multiplier of -1.0 is used to make the time positive. The */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1765 /* desired point when gas tension equals ambient pressure is found at a time */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1766 /* somewhere between these endpoints. The algorithm checks to make sure that */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1767 /* the solution lies in between these bounds by first computing the low bound */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1768 /* and high bound function values. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1769 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1770
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1771 low_bound = 0.;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1772 high_bound = starting_ambient_pressure / *rate * -1.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1773 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1774 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1775 initial_helium_pressure = helium_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1776 initial_nitrogen_pressure = nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1777 function_at_low_bound =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1778 initial_helium_pressure +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1779 initial_nitrogen_pressure +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1780 CONSTANT_PRESSURE_OTHER_GASES -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1781 starting_ambient_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1782 high_bound_helium_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1783 schreiner_equation__2(&initial_inspired_he_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1784 &helium_rate,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1785 &high_bound,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1786 &HELIUM_TIME_CONSTANT[i - 1],
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1787 &initial_helium_pressure);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1788 high_bound_nitrogen_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1789 schreiner_equation__2(&initial_inspired_n2_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1790 &nitrogen_rate,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1791 &high_bound,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1792 &NITROGEN_TIME_CONSTANT[i - 1],
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1793 &initial_nitrogen_pressure);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1794 function_at_high_bound = high_bound_helium_pressure +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1795 high_bound_nitrogen_pressure +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1796 CONSTANT_PRESSURE_OTHER_GASES;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1797 if (function_at_high_bound * function_at_low_bound >= 0.0f)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1798 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1799 printf("\nERROR! ROOT IS NOT WITHIN BRACKETS");
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1800 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1801
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1802 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1803 /* APPLY THE BISECTION METHOD IN SEVERAL ITERATIONS UNTIL A SOLUTION WITH */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1804 /* THE DESIRED ACCURACY IS FOUND */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1805 /* Note: the program allows for up to 100 iterations. Normally an exit will */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1806 /* be made from the loop well before that number. If, for some reason, the */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1807 /* program exceeds 100 iterations, there will be a pause to alert the user. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1808 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1809
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1810 if (function_at_low_bound < 0.0f)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1811 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1812 time_to_start_of_deco_zone = low_bound;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1813 differential_change = high_bound - low_bound;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1814 } else {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1815 time_to_start_of_deco_zone = high_bound;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1816 differential_change = low_bound - high_bound;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1817 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1818 for (j = 1; j <= 100; ++j)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1819 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1820 last_diff_change = differential_change;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1821 differential_change = last_diff_change * 0.5f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1822 mid_range_time =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1823 time_to_start_of_deco_zone +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1824 differential_change;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1825 mid_range_helium_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1826 schreiner_equation__2(&initial_inspired_he_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1827 &helium_rate,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1828 &mid_range_time,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1829 &HELIUM_TIME_CONSTANT[i - 1],
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1830 &initial_helium_pressure);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1831 mid_range_nitrogen_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1832 schreiner_equation__2(&initial_inspired_n2_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1833 &nitrogen_rate,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1834 &mid_range_time,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1835 &NITROGEN_TIME_CONSTANT[i - 1],
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1836 &initial_nitrogen_pressure);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1837 function_at_mid_range =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1838 mid_range_helium_pressure +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1839 mid_range_nitrogen_pressure +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1840 CONSTANT_PRESSURE_OTHER_GASES -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1841 (starting_ambient_pressure + *rate * mid_range_time);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1842 if (function_at_mid_range <= 0.0f) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1843 time_to_start_of_deco_zone = mid_range_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1844 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1845 if( fabs(differential_change) < 0.001f
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1846 || function_at_mid_range == 0.0f)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1847 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1848 goto L170;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1849 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1850 /* L150: */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1851 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1852 printf("\nERROR! ROOT SEARCH EXCEEDED MAXIMUM ITERATIONS");
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1853 //pause();
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1854
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1855 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1856 /* When a solution with the desired accuracy is found, the program jumps out */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1857 /* of the loop to Line 170 and assigns the solution value for the individual */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1858 /* compartment. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1859 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1860
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1861 L170:
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1862 cpt_depth_start_of_deco_zone =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1863 starting_ambient_pressure +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1864 *rate * time_to_start_of_deco_zone -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1865 barometric_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1866
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1867 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1868 /* The overall solution will be the compartment with the maximum depth where */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1869 /* gas tension equals ambient pressure (leading compartment). */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1870 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1871
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1872 *depth_start_of_deco_zone =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1873 fmaxf(*depth_start_of_deco_zone, cpt_depth_start_of_deco_zone);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1874 /* L200: */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1875 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1876 return 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1877 } /* calc_start_of_deco_zone */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1878
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1879 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1880 /* SUBROUTINE PROJECTED_ASCENT */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1881 /* Purpose: This subprogram performs a simulated ascent outside of the main */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1882 /* program to ensure that a deco ceiling will not be violated due to unusual */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1883 /* gas loading during ascent (on-gassing). If the deco ceiling is violated, */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1884 /* the stop depth will be adjusted deeper by the step size until a safe */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1885 /* ascent can be made. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1886 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1887
290
5e0bb91d4a12 VPM, cleanup: 1st round
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
diff changeset
1888 static int projected_ascent(float *starting_depth,
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1889 float *rate,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1890 float *deco_stop_depth,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1891 float *step_size)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1892 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1893 /* Local variables */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1894 float weighted_allowable_gradient,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1895 ending_ambient_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1896 temp_gas_loading[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1897 int i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1898 float allowable_gas_loading[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1899 float temp_nitrogen_pressure[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1900 float temp_helium_pressure[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1901 float run_time_save = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1902
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1903 /* loop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1904 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1905 /* CALCULATIONS */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1906 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1907
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1908
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1909 L665:
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1910 ending_ambient_pressure = *deco_stop_depth + barometric_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1911 for (i = 1; i <= 16; ++i) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1912 temp_helium_pressure[i - 1] = helium_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1913 temp_nitrogen_pressure[i - 1] = nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1914 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1915 run_time_save = run_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1916 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
1917 run_time = run_time_save;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1918
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1919 for (i = 1; i <= 16; ++i)
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heinrichsweikamp
parents:
diff changeset
1920 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1921 temp_gas_loading[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1922 temp_helium_pressure[i - 1] +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1923 temp_nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1924 if (temp_gas_loading[i - 1] > 0.0f)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1925 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1926 weighted_allowable_gradient =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1927 (allowable_gradient_he[i - 1] *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1928 temp_helium_pressure[i - 1] +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1929 allowable_gradient_n2[i - 1] *
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1930 temp_nitrogen_pressure[i - 1]) / temp_gas_loading[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1931 } else {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1932 /* Computing MIN */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1933 weighted_allowable_gradient = fminf(allowable_gradient_he[i - 1],allowable_gradient_n2[i - 1]);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1934 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1935 allowable_gas_loading[i - 1] =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1936 ending_ambient_pressure +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1937 weighted_allowable_gradient -
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1938 CONSTANT_PRESSURE_OTHER_GASES;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1939 /* L670: */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1940 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1941 for (i = 1; i <= 16; ++i) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1942 if (temp_gas_loading[i - 1] > allowable_gas_loading[i - 1]) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1943 *deco_stop_depth += *step_size;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1944 goto L665;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1945 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1946 /* L671: */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1947 }
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heinrichsweikamp
parents:
diff changeset
1948 return 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1949 } /* projected_ascent */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1950
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heinrichsweikamp
parents:
diff changeset
1951 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1952 /* SUBROUTINE DECOMPRESSION_STOP */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1953 /* Purpose: This subprogram calculates the required time at each */
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heinrichsweikamp
parents:
diff changeset
1954 /* decompression stop. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1955 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1956
290
5e0bb91d4a12 VPM, cleanup: 1st round
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
diff changeset
1957 static void decompression_stop(float *deco_stop_depth,
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1958 float *step_size,
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heinrichsweikamp
parents:
diff changeset
1959 _Bool final_deco_calculation)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1960 {
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heinrichsweikamp
parents:
diff changeset
1961 /* Local variables */
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heinrichsweikamp
parents:
diff changeset
1962 float inspired_nitrogen_pressure;
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heinrichsweikamp
parents:
diff changeset
1963 // short last_segment_number;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1964 // float weighted_allowable_gradient;
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heinrichsweikamp
parents:
diff changeset
1965 float initial_helium_pressure[16];
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heinrichsweikamp
parents:
diff changeset
1966 /* by hw */
51
8f8ea3a32e82 Resolved warnings pointing to possible invalid memory access
Ideenmodellierer
parents: 38
diff changeset
1967 float initial_CNS = gCNS_VPM;
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1968
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heinrichsweikamp
parents:
diff changeset
1969 //static float time_counter;
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heinrichsweikamp
parents:
diff changeset
1970 short i;
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heinrichsweikamp
parents:
diff changeset
1971 float ambient_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1972 float inspired_helium_pressure,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1973 next_stop;
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heinrichsweikamp
parents:
diff changeset
1974 //last_run_time,
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heinrichsweikamp
parents:
diff changeset
1975 //temp_segment_time;
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heinrichsweikamp
parents:
diff changeset
1976
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1977 float deco_ceiling_depth,
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heinrichsweikamp
parents:
diff changeset
1978 initial_nitrogen_pressure[16];
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heinrichsweikamp
parents:
diff changeset
1979 //round_up_operation;
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heinrichsweikamp
parents:
diff changeset
1980 float fraction_helium_begin;
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heinrichsweikamp
parents:
diff changeset
1981 float fraction_nitrogen_begin;
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heinrichsweikamp
parents:
diff changeset
1982 int count = 0;
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heinrichsweikamp
parents:
diff changeset
1983 _Bool buehlmann_wait = false;
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heinrichsweikamp
parents:
diff changeset
1984 float tissue_He_saturation[16];
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heinrichsweikamp
parents:
diff changeset
1985 float tissue_N2_saturation[16];
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heinrichsweikamp
parents:
diff changeset
1986 float vpm_buehlmann_safety_gradient = 1.0f - (((float)pDiveSettings->vpm_conservatism) / 40);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1987 /* loop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1988 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1989 /* CALCULATIONS */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1990 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1991
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1992 segment_time = 0;
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heinrichsweikamp
parents:
diff changeset
1993 // temp_segment_time = segment_time;
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heinrichsweikamp
parents:
diff changeset
1994 ambient_pressure = *deco_stop_depth + barometric_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1995 //ending_ambient_pressure = ambient_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1996 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
1997
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1998 if(*deco_stop_depth == (float)(pDiveSettings->last_stop_depth_bar * 10))
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heinrichsweikamp
parents:
diff changeset
1999 next_stop = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2000 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2001 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2002 next_stop = *deco_stop_depth - *step_size;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2003 next_stop = fmaxf(next_stop,(float)pDiveSettings->last_stop_depth_bar * 10);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2004 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2005
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2006 inspired_helium_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2007 (ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_helium_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2008 inspired_nitrogen_pressure =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2009 (ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_nitrogen_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2010
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2011 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2012 /* Check to make sure that program won't lock up if unable to decompress */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2013 /* to the next stop. If so, write error message and terminate program. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2014 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2015
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2016 //deco_ceiling_depth = next_stop +1; //deco_ceiling_depth = next_stop + 1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2017 if(!vpm_violates_buehlmann)
149
e1d66bc78f9a Eliminate warnings
Ideenmodellierer
parents: 51
diff changeset
2018 {
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2019 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
2020 }
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2021 else
149
e1d66bc78f9a Eliminate warnings
Ideenmodellierer
parents: 51
diff changeset
2022 {
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2023 deco_ceiling_depth = next_stop + 1;
149
e1d66bc78f9a Eliminate warnings
Ideenmodellierer
parents: 51
diff changeset
2024 }
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2025 if(deco_ceiling_depth > next_stop)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2026 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2027 while (deco_ceiling_depth > next_stop)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2028 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2029
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2030 segment_time += 60;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2031 if(segment_time >= 999 )
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2032 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2033 segment_time = 999 ;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2034 run_time += segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2035 return;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2036 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2037 //goto L700;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2038 initial_CNS = gCNS_VPM;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2039 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
2040 for (i = 0; i < 16; i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2041 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2042 initial_helium_pressure[i] = helium_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2043 initial_nitrogen_pressure[i] = nitrogen_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2044 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
2045 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
2046 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2047 calc_deco_ceiling(&deco_ceiling_depth, false);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2048 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2049 if(deco_ceiling_depth < next_stop)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2050 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2051 segment_time -= 60;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2052 gCNS_VPM = initial_CNS;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2053 for (i = 0; i < 16; i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2054 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2055 helium_pressure[i] = initial_helium_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2056 nitrogen_pressure[i] = initial_nitrogen_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2057 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2058 deco_ceiling_depth = next_stop +1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2059 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2060 count = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2061 while (deco_ceiling_depth > next_stop && count < 13)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2062 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2063 count++;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2064 segment_time += 5;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2065 //goto L700;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2066 initial_CNS = gCNS_VPM;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2067 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
2068 for (i = 0; i < 16; i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2069 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2070 initial_helium_pressure[i] = helium_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2071 initial_nitrogen_pressure[i] = nitrogen_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2072 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
2073 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
2074 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2075 calc_deco_ceiling(&deco_ceiling_depth, false);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2076 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2077 if(deco_ceiling_depth < next_stop)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2078 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2079 segment_time -= 5;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2080 gCNS_VPM = initial_CNS;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2081 for (i = 0; i < 16; i++) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2082 helium_pressure[i] = initial_helium_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2083 nitrogen_pressure[i] = initial_nitrogen_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2084 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2085 deco_ceiling_depth = next_stop +1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2086 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2087 buehlmann_wait = false;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2088 while (buehlmann_wait || (deco_ceiling_depth > next_stop))
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2089 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2090 //time_counter = temp_segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2091 segment_time += 1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2092
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2093 if(segment_time >= 999 )
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2094 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2095 segment_time = 999 ;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2096 run_time += segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2097 return;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2098 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2099 //goto L700;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2100 initial_CNS = gCNS_VPM;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2101 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
2102 for (i = 0; i < 16; i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2103 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2104 initial_helium_pressure[i] = helium_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2105 initial_nitrogen_pressure[i] = nitrogen_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2106 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
2107 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
2108 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2109 if(!buehlmann_wait)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2110 calc_deco_ceiling(&deco_ceiling_depth, false);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2111
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2112 if(buehlmannSafety && final_deco_calculation && !(deco_ceiling_depth > next_stop))
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2113 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2114 for (i = 0; i < 16; i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2115 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2116 tissue_He_saturation[i] = helium_pressure[i] / 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2117 tissue_N2_saturation[i] = nitrogen_pressure[i] / 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2118 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2119 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
2120 && (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
2121 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2122 buehlmann_wait_exceeded = true;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2123 break;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2124 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2125
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2126 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
2127 break;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2128
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2129 buehlmann_wait = true;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2130 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2131 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2132 if(buehlmann_wait)
149
e1d66bc78f9a Eliminate warnings
Ideenmodellierer
parents: 51
diff changeset
2133 {
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2134 vpm_violates_buehlmann = true;
149
e1d66bc78f9a Eliminate warnings
Ideenmodellierer
parents: 51
diff changeset
2135 }
e1d66bc78f9a Eliminate warnings
Ideenmodellierer
parents: 51
diff changeset
2136 if(!buehlmann_wait)
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2137 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2138 if(deco_ceiling_depth < next_stop)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2139 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2140 segment_time -= 1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2141 gCNS_VPM = initial_CNS;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2142 for (i = 0; i < 16; i++) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2143 helium_pressure[i] = initial_helium_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2144 nitrogen_pressure[i] = initial_nitrogen_pressure[i];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2145 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2146 deco_ceiling_depth = next_stop +1;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2147 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2148 while (deco_ceiling_depth > next_stop)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2149 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2150 //time_counter = temp_segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2151 segment_time += (float) 1.0f / 3.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2152 //goto L700;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2153 initial_CNS = gCNS_VPM;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2154 decom_oxygen_calculate_cns_exposure(20,&pDiveSettings->decogaslist[mix_number],ambient_pressure/10,&gCNS_VPM);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2155 for (i = 0; i < 16; i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2156 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2157 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
2158 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
2159 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2160 calc_deco_ceiling(&deco_ceiling_depth, false);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2161 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2162 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2163 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2164
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2165 /*float pressure_save =dive_data.pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2166 dive_data.pressure = ambient_pressure/10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2167 tissues_exposure_stage(st_deco_test,(int)(segment_time * 60), &dive_data, &gaslist);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2168 dive_data.pressure = pressure_save;*/
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2169 run_time += segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2170 return;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2171 } /* decompression_stop */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2172
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2173 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2174 // SUROUTINE BOYLES_LAW_COMPENSATION
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2175 // Purpose: This subprogram calculates the reduction in allowable gradients
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2176 // with decreasing ambient pressure during the decompression profile based
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2177 // on Boyle's Law considerations.
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2178 //===============================================================================
290
5e0bb91d4a12 VPM, cleanup: 1st round
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
diff changeset
2179 static void BOYLES_LAW_COMPENSATION (float* First_Stop_Depth,
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2180 float* Deco_Stop_Depth,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2181 float* Step_Size)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2182 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2183 short i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2184
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2185 float Next_Stop;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2186 float Ambient_Pressure_First_Stop, Ambient_Pressure_Next_Stop;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2187 float Amb_Press_First_Stop_Pascals, Amb_Press_Next_Stop_Pascals;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2188 float A, B, C, Low_Bound, High_Bound, Ending_Radius;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2189 float Deco_Gradient_Pascals;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2190 float Allow_Grad_First_Stop_He_Pa, Radius_First_Stop_He;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2191 float Allow_Grad_First_Stop_N2_Pa, Radius_First_Stop_N2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2192
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2193 //===============================================================================
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2194 // LO//AL ARRAYS
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2195 //===============================================================================
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2196 // float Radius1_He[16], Radius2_He[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2197 // float Radius1_N2[16], Radius2_N2[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2198 float root_factor;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2199
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2200 //===============================================================================
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2201 // CALCULATIONS
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2202 //===============================================================================
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2203 Next_Stop = *Deco_Stop_Depth - *Step_Size;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2204
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2205 Ambient_Pressure_First_Stop = *First_Stop_Depth +
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2206 barometric_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2207
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2208 Ambient_Pressure_Next_Stop = Next_Stop + barometric_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2209
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2210 Amb_Press_First_Stop_Pascals = (Ambient_Pressure_First_Stop/UNITS_FACTOR) * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2211
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2212 Amb_Press_Next_Stop_Pascals =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2213 (Ambient_Pressure_Next_Stop/UNITS_FACTOR) * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2214 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
2215
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2216 for( i = 0; i < 16;i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2217 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2218 Allow_Grad_First_Stop_He_Pa =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2219 (allowable_gradient_he[i]/UNITS_FACTOR) * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2220
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2221 Radius_First_Stop_He = (2.0f * SURFACE_TENSION_GAMMA) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2222 Allow_Grad_First_Stop_He_Pa;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2223
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2224 // Radius1_He[i] = Radius_First_Stop_He;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2225 A = Amb_Press_Next_Stop_Pascals;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2226 B = -2.0f * SURFACE_TENSION_GAMMA;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2227 C = (Amb_Press_First_Stop_Pascals + (2.0f * SURFACE_TENSION_GAMMA)/
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2228 Radius_First_Stop_He)* Radius_First_Stop_He*
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2229 (Radius_First_Stop_He*(Radius_First_Stop_He));
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2230 Low_Bound = Radius_First_Stop_He;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2231 High_Bound = Radius_First_Stop_He * root_factor;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2232 //*pow(Amb_Press_First_Stop_Pascals/Amb_Press_Next_Stop_Pascals,1.0/3.0);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2233 //*(Amb_Press_First_Stop_Pascals/Amb_Press_Next_Stop_Pascals)**(1.0/3.0);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2234
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2235 radius_root_finder(&A,&B,&C, &Low_Bound, &High_Bound,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2236 &Ending_Radius);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2237
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2238 // Radius2_He[i] = Ending_Radius;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2239 Deco_Gradient_Pascals = (2.0f * SURFACE_TENSION_GAMMA) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2240 Ending_Radius;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2241
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2242 deco_gradient_he[i] = (Deco_Gradient_Pascals / 101325.0f)*
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2243 UNITS_FACTOR;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2244
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2245 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2246
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 Allow_Grad_First_Stop_N2_Pa =
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2250 (allowable_gradient_n2[i]/UNITS_FACTOR) * 101325.0f;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2251
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2252 Radius_First_Stop_N2 = (2.0f * SURFACE_TENSION_GAMMA) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2253 Allow_Grad_First_Stop_N2_Pa;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2254
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2255 // Radius1_N2[i] = Radius_First_Stop_N2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2256 A = Amb_Press_Next_Stop_Pascals;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2257 B = -2.0f * SURFACE_TENSION_GAMMA;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2258 C = (Amb_Press_First_Stop_Pascals + (2.0f * SURFACE_TENSION_GAMMA)/
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2259 Radius_First_Stop_N2)* Radius_First_Stop_N2*
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2260 (Radius_First_Stop_N2*(Radius_First_Stop_N2));
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2261 Low_Bound = Radius_First_Stop_N2;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2262 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
2263
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2264 //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
2265 radius_root_finder(&A,&B,&C, &Low_Bound, &High_Bound,
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2266 &Ending_Radius);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2267
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2268 // Radius2_N2[i] = Ending_Radius;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2269 Deco_Gradient_Pascals = (2.0f * SURFACE_TENSION_GAMMA) /
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2270 Ending_Radius;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2271
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2272 deco_gradient_n2[i] = (Deco_Gradient_Pascals / 101325.0f)*
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2273 UNITS_FACTOR;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2274 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2275 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2276
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2277 /* =============================================================================== */
292
bfcea6e2ab3f translate: nullzeit -> ndl
Jan Mulder <jlmulder@xs4all.nl>
parents: 291
diff changeset
2278 // vpm_calc_ndl
bfcea6e2ab3f translate: nullzeit -> ndl
Jan Mulder <jlmulder@xs4all.nl>
parents: 291
diff changeset
2279 // Purpose: This function computes NDL (time where no decostops are needed)
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2280 //===============================================================================
291
24ff72e627f4 Deco Models: limit NDL to 240 minutes
Jan Mulder <jlmulder@xs4all.nl>
parents: 290
diff changeset
2281 #define MAX_NDL 240
24ff72e627f4 Deco Models: limit NDL to 240 minutes
Jan Mulder <jlmulder@xs4all.nl>
parents: 290
diff changeset
2282
292
bfcea6e2ab3f translate: nullzeit -> ndl
Jan Mulder <jlmulder@xs4all.nl>
parents: 291
diff changeset
2283 static int vpm_calc_ndl(void)
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2284 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2285 static float future_helium_pressure[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2286 static float future_nitrogen_pressure[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2287 static int temp_segment_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2288 static int mix_number;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2289 static float inspired_helium_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2290 static float inspired_nitrogen_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2291
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2292 float previous_helium_pressure[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2293 float previous_nitrogen_pressure[16];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2294 float ambient_pressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2295 float fraction_helium_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2296 float fraction_nitrogen_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2297 int i = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2298 int count = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2299 int status = CALC_END;
291
24ff72e627f4 Deco Models: limit NDL to 240 minutes
Jan Mulder <jlmulder@xs4all.nl>
parents: 290
diff changeset
2300
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2301 for(i = 0; i < 16;i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2302 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2303 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
2304 future_nitrogen_pressure[i] = pInput->tissue_nitrogen_bar[i] * 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2305 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2306 temp_segment_time = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2307
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2308 mix_number = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2309 ambient_pressure = pInput->pressure_ambient_bar * 10;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2310 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
2311 inspired_helium_pressure =(ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_helium_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2312 inspired_nitrogen_pressure =(ambient_pressure - WATER_VAPOR_PRESSURE) *fraction_nitrogen_begin;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2313
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2314 status = CALC_END;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2315 while (status == CALC_END)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2316 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2317 count++;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2318 temp_segment_time += 60;
291
24ff72e627f4 Deco Models: limit NDL to 240 minutes
Jan Mulder <jlmulder@xs4all.nl>
parents: 290
diff changeset
2319 if(temp_segment_time >= MAX_NDL)
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2320 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2321 pDecoInfo->output_ndl_seconds = temp_segment_time * 60;
292
bfcea6e2ab3f translate: nullzeit -> ndl
Jan Mulder <jlmulder@xs4all.nl>
parents: 291
diff changeset
2322 return CALC_NDL;
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2323 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2324 run_time += 60;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2325 //goto L700;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2326 for (i = 1; i <= 16; ++i) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2327 previous_helium_pressure[i-1] = future_helium_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2328 previous_nitrogen_pressure[i - 1] = future_nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2329 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
2330 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
2331 helium_pressure[i - 1] = future_helium_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2332 nitrogen_pressure[i - 1] = future_nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2333 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2334 vpm_calc_deco();
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2335 while((status = vpm_calc_critcal_volume(true,true)) == CALC_CRITICAL);
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 temp_segment_time -= 60;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2340 run_time -= 60;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2341 for (i = 1; i <= 16; ++i)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2342 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2343 future_helium_pressure[i - 1] = previous_helium_pressure[i-1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2344 future_nitrogen_pressure[i - 1] = previous_nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2345 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2346
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2347 status = CALC_END;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2348 if(temp_segment_time < 60)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2349 nullzeit_unter60 = true;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2350
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2351 while (status == CALC_END)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2352 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2353 temp_segment_time += 5;
291
24ff72e627f4 Deco Models: limit NDL to 240 minutes
Jan Mulder <jlmulder@xs4all.nl>
parents: 290
diff changeset
2354 if(temp_segment_time >= MAX_NDL)
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2355 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2356 pDecoInfo->output_ndl_seconds = temp_segment_time * 60;
292
bfcea6e2ab3f translate: nullzeit -> ndl
Jan Mulder <jlmulder@xs4all.nl>
parents: 291
diff changeset
2357 return CALC_NDL;
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2358 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2359 if(nullzeit_unter60 && temp_segment_time > 60)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2360 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2361 nullzeit_unter60 = false;
292
bfcea6e2ab3f translate: nullzeit -> ndl
Jan Mulder <jlmulder@xs4all.nl>
parents: 291
diff changeset
2362 return CALC_NDL;
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2363 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2364 run_time += 5;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2365 //goto L700;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2366 for (i = 1; i <= 16; ++i) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2367 previous_helium_pressure[i-1] = future_helium_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2368 previous_nitrogen_pressure[i - 1] = future_nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2369 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
2370 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
2371 helium_pressure[i - 1] = future_helium_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2372 nitrogen_pressure[i - 1] = future_nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2373 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2374 vpm_calc_deco();
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2375 while((status =vpm_calc_critcal_volume(true,true)) == CALC_CRITICAL);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2376 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2377 temp_segment_time -= 5;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2378 run_time -= 5;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2379 for (i = 1; i <= 16; ++i) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2380 future_helium_pressure[i - 1] = previous_helium_pressure[i-1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2381 future_nitrogen_pressure[i - 1] = previous_nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2382 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2383 status = CALC_END;
291
24ff72e627f4 Deco Models: limit NDL to 240 minutes
Jan Mulder <jlmulder@xs4all.nl>
parents: 290
diff changeset
2384
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2385 if(temp_segment_time <= 20)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2386 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2387 while (status == CALC_END)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2388 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2389 temp_segment_time += minimum_deco_stop_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2390 run_time += minimum_deco_stop_time;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2391 //goto L700;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2392 for (i = 1; i <= 16; ++i) {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2393 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
2394 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
2395 helium_pressure[i - 1] = future_helium_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2396 nitrogen_pressure[i - 1] =future_nitrogen_pressure[i - 1];
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2397
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2398 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2399 vpm_calc_deco();
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2400 while((status =vpm_calc_critcal_volume(true,true)) == CALC_CRITICAL);
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2401
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2402 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2403 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2404 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2405 temp_segment_time += 5;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2406 pDecoInfo->output_ndl_seconds = temp_segment_time * 60;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2407 if(temp_segment_time > 1)
292
bfcea6e2ab3f translate: nullzeit -> ndl
Jan Mulder <jlmulder@xs4all.nl>
parents: 291
diff changeset
2408 return CALC_NDL;
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2409 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2410 return CALC_BEGIN;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
2411 }