annotate Discovery/Src/vpm.c @ 493:b560e474e319

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author Ideenmodellierer
date Mon, 24 Aug 2020 19:36:18 +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
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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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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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490 depth_start_of_deco_calc = starting_depth;
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491 critical_volume_algorithm_off = true;
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492 }
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parents:
diff changeset
493 else
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heinrichsweikamp
parents:
diff changeset
494 {
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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 */
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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. */
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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();
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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 /* =============================================================================== */
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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
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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
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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)
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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.;
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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 }
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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;
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Jan Mulder <jlmulder@xs4all.nl>
parents: 247
diff changeset
591 static int vpm_calc_critcal_volume(_Bool begin,
38
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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;
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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;
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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 /* =============================================================================== */
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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)
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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);
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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
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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 {
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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
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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
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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 {
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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 }
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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 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
663 if (deco_stop_depth < depth_start_of_deco_calc)
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heinrichsweikamp
parents:
diff changeset
664 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
665 projected_ascent(&depth_start_of_deco_calc, &rate, &deco_stop_depth, &step_size);
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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) {
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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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parents:
diff changeset
673 exit(1);
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parents:
diff changeset
674 }*/
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heinrichsweikamp
parents:
diff changeset
675
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heinrichsweikamp
parents:
diff changeset
676 /* =============================================================================== */
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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
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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
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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 {
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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 }
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heinrichsweikamp
parents:
diff changeset
696
292
bfcea6e2ab3f translate: nullzeit -> ndl
Jan Mulder <jlmulder@xs4all.nl>
parents: 291
diff changeset
697 return CALC_NDL;
38
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heinrichsweikamp
parents:
diff changeset
698 /* exit the critical volume l */
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heinrichsweikamp
parents:
diff changeset
699 }
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heinrichsweikamp
parents:
diff changeset
700
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heinrichsweikamp
parents:
diff changeset
701 /* =============================================================================== */
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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 /* =============================================================================== */
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heinrichsweikamp
parents:
diff changeset
705 deco_stop_depth = fmaxf(deco_stop_depth,(float)pDiveSettings->last_stop_depth_bar * 10);
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heinrichsweikamp
parents:
diff changeset
706 starting_depth = depth_start_of_deco_calc;
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heinrichsweikamp
parents:
diff changeset
707 first_stop_depth = deco_stop_depth;
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heinrichsweikamp
parents:
diff changeset
708 first_stop = true;
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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 */
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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 */
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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. */
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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
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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;
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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)
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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
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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
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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
5f11787b4f42 include in ostc4 repository
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. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1217 /* It is independent of crushing pressure. */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1218 /* =============================================================================== */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1219
5f11787b4f42 include in ostc4 repository
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);
5f11787b4f42 include in ostc4 repository
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
5f11787b4f42 include in ostc4 repository
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 */
5f11787b4f42 include in ostc4 repository
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 */
5f11787b4f42 include in ostc4 repository
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
5f11787b4f42 include in ostc4 repository
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));
5f11787b4f42 include in ostc4 repository
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;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1261 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1262 return 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1263 } /* nuclear_regeneration */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1264
5f11787b4f42 include in ostc4 repository
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 */
5f11787b4f42 include in ostc4 repository
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 */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1277 /* designated minimum initial radius (critical radius). */
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
1278
5f11787b4f42 include in ostc4 repository
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 {
5f11787b4f42 include in ostc4 repository
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
5f11787b4f42 include in ostc4 repository
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;
5f11787b4f42 include in ostc4 repository
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;
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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 }