annotate Discovery/Src/buehlmann.c @ 365:c18aebb03fed MotionDetection

Bugfix: selection of current view not working
author ideenmodellierer
date Mon, 17 Jun 2019 19:53:01 +0200
parents 24ff72e627f4
children 305f251cc981
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51
8f8ea3a32e82 Resolved warnings pointing to possible invalid memory access
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1 /* getrennte Gase f�r die verschiedenen Modi
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2 um Gaswechsel Eintr�ge zu vereinfachen
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3 das heisst:
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4 oc == bailout in cc mode
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5 */
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6
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7 /* Konvention:
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8 float extExample_variable_can_be_used_with_extern;
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9 */
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10
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11 #include <string.h>
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12 #include <math.h>
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13 #include <stdbool.h>
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14 #include "buehlmann.h"
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15 #include "decom.h"
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16
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17 extern const float buehlmann_N2_a[];
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18 extern const float buehlmann_N2_b[];
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19 extern const float buehlmann_He_a[];
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20 extern const float buehlmann_He_b[];
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21
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22 typedef struct
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23 {
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24 float depth;
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25 int id;
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26 } SStop;
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27
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28 #define DECO_STOPS_MAX_TTS_CALCULATON_IN_SECONDS 59940 // 999 minuten; before: 18000 // 5(h) * 60(min) * 60 sec = 18000 sec
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29 #define DECO_STOPS_MAX_TTS_FOR_EVERY_SECOND_CALC_IN_SECONDS 7200
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30 #define NINETY_NINE_MINUTES_IN_SECONDS 59940
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31
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32 # define PRESSURE_TEN_METER 1.0f
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33 # define PRESSURE_THREE_METER 0.333334f
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34 # define PRESSURE_150_CM 0.15f
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35 # define PRESSURE_HALF_METER 0.05f
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36
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37 static void buehlmann_backup_and_restore(_Bool backup_restore_otherwise);
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38 static float tissue_tolerance(void);
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39 static void ambient_bar_to_deco_stop_depth_bar(SDiveSettings *pDiveSettings, float ceiling);
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40 static int ascend_with_all_gaschanges(SDiveSettings *pDiveSettings, float pressure_decrease);
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41 static float next_stop_depth_input_is_actual_stop_id(SDiveSettings *pDiveSettings, int actual_id);
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42 static float get_gf_at_pressure(SDiveSettings *pDiveSettings, float pressure);
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43 static int buehlmann_calc_ndl(SDiveSettings *pDiveSettings);
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44 static _Bool dive1_check_deco(SDiveSettings *pDiveSettings);
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45
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46 static float gSurface_pressure_bar;
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47 static float gPressure;
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48 static int gGas_id;
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49 static float gTissue_nitrogen_bar[16];
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50 static float gTissue_helium_bar[16];
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51 static float gGF_value;
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52 static float gCNS;
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53
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54 float gGF_low_depth_bar;
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55 SStop gStop;
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56
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57 void buehlmann_init(void)
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58 {
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59 }
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60
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61 static void buehlmann_backup_and_restore(_Bool backup_restore_otherwise)
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62 {
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63 static float pressure;
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64 static float gas_id;
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65 static float tissue_nitrogen_bar[16];
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66 static float tissue_helium_bar[16];
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67 static float gf_value;
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68 static float cns;
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69
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70 if(backup_restore_otherwise)
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71 {
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72 pressure = gPressure;
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73 gas_id = gGas_id;
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74 gf_value = gGF_value;
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75 cns = gCNS;
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76 memcpy(tissue_nitrogen_bar, gTissue_nitrogen_bar, (4*16));
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77 memcpy(tissue_helium_bar, gTissue_helium_bar, (4*16));
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78 }
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79 else
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80 {
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81 gPressure = pressure;
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82 gGas_id = gas_id;
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83 gGF_value = gf_value;
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84 gCNS = cns;
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85 memcpy(gTissue_nitrogen_bar, tissue_nitrogen_bar, (4*16));
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86 memcpy(gTissue_helium_bar, tissue_helium_bar, (4*16));
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87 }
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88
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89 }
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90
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91 float buehlmann_get_gCNS(void)
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92 {
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93 return gCNS;
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94 }
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95
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96 void buehlmann_calc_deco(SLifeData* pLifeData, SDiveSettings * pDiveSettings, SDecoinfo * pDecoInfo)
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97 {
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98 float ceiling;
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99 int ascend_time;
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100 int tts_seconds;
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101 float pressure_delta;
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102 float next_depth;
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103 _Bool deco_reached = false;
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104 unsigned short *stoplist;
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105 int i;
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106
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107 gCNS = 0;
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108 pDecoInfo->output_time_to_surface_seconds = 0;
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109 pDecoInfo->output_ndl_seconds = 0;
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110 for(int i=0;i<DECOINFO_STRUCT_MAX_STOPS;i++)
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111 {
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112 pDecoInfo->output_stop_length_seconds[i] = 0;
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113 }
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114
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115 /* internal copying */
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116 gSurface_pressure_bar = pLifeData->pressure_surface_bar;
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117
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118 gPressure = pLifeData->pressure_ambient_bar;
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119 gGas_id = 0;
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120 memcpy(gTissue_nitrogen_bar, pLifeData->tissue_nitrogen_bar, (4*16));
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121 memcpy(gTissue_helium_bar, pLifeData->tissue_helium_bar, (4*16));
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122 gGF_value = ((float)pDiveSettings->gf_low) / 100.0f;
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123
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124 stoplist = pDecoInfo->output_stop_length_seconds;
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125
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126 if(pLifeData->dive_time_seconds < 60)
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127 return;
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128
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129 // clean stop list
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130 for(i = 0; i < DECOINFO_STRUCT_MAX_STOPS; i++)
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131 stoplist[i] = 0;
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132
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133 if(pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero >= (gPressure - PRESSURE_150_CM))
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134 {
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135 deco_reached = true;
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136 }
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137
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138 gGF_value = ((float)pDiveSettings->gf_high) / 100.0f;
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139 buehlmann_backup_and_restore(true);
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140 if(!dive1_check_deco(pDiveSettings) )
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141 {
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142 buehlmann_backup_and_restore(false);
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143 // no deco
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144 pDecoInfo->output_time_to_surface_seconds = 0;
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145 for(i = 0; i < DECOINFO_STRUCT_MAX_STOPS; i++)
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146 pDecoInfo->output_stop_length_seconds[i] = 0;
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147 // calc NDL
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148 pDecoInfo->output_ndl_seconds = buehlmann_calc_ndl(pDiveSettings);;
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149 return;
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150 }
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151 buehlmann_backup_and_restore(false);
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152 pDecoInfo->output_ndl_seconds = 0;
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153
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154 gGF_value = get_gf_at_pressure(pDiveSettings, gPressure);
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155 //current ceiling at actual position
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156 ceiling = tissue_tolerance();
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157 ambient_bar_to_deco_stop_depth_bar(pDiveSettings, ceiling);
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158
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159 // set the base for all upcoming parameters
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160 ceiling = gStop.depth + gSurface_pressure_bar;
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161 tts_seconds = 0;
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162
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163 // modify parameters if there is ascend or parameter fine adjustment
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164 if(ceiling < (gPressure - PRESSURE_150_CM)) // more than 1.5 meter below ceiling
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165 {
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166 // ascend within 10 mtr to GF_low // speed 12 mtr/min -> 50 sec / 10 mtr; 15 sec / 3 mtr.
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167 if(ceiling < (gPressure - PRESSURE_TEN_METER) )
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168 { do {
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169 ascend_time = ascend_with_all_gaschanges(pDiveSettings, PRESSURE_TEN_METER);
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170 tts_seconds += ascend_time;
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171 ceiling = tissue_tolerance();
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172 if(tts_seconds > DECO_STOPS_MAX_TTS_CALCULATON_IN_SECONDS)
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173 {
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174 pDecoInfo->output_time_to_surface_seconds = NINETY_NINE_MINUTES_IN_SECONDS;
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175 return;// NINETY_NINE_MINUTES_IN_SECONDS;
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176 }
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177 } while ((ascend_time > 0 ) && ((gPressure - PRESSURE_TEN_METER ) > gSurface_pressure_bar) && (ceiling < (gPressure - PRESSURE_TEN_METER)));
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178 }
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179 do {
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180 buehlmann_backup_and_restore(true);
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181 ascend_time = ascend_with_all_gaschanges(pDiveSettings, PRESSURE_THREE_METER);
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182 tts_seconds += ascend_time;
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183 ceiling = tissue_tolerance();
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184 if(tts_seconds > DECO_STOPS_MAX_TTS_CALCULATON_IN_SECONDS)
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185 {
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186 pDecoInfo->output_time_to_surface_seconds = NINETY_NINE_MINUTES_IN_SECONDS;
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187 return;// NINETY_NINE_MINUTES_IN_SECONDS;
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188 }
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189 ambient_bar_to_deco_stop_depth_bar(pDiveSettings, ceiling);
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190 } while ((ascend_time > 0 ) && ((gStop.depth + gSurface_pressure_bar) < gPressure));
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191
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192 if(gStop.depth + gSurface_pressure_bar > gPressure)
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193 {
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194 gPressure += PRESSURE_THREE_METER;
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195 buehlmann_backup_and_restore(false);
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196 tts_seconds -= ascend_time;
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197 }
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198 // calculate first stop based on tissue saturation within 10 meters of stop
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199 //ambient_bar_to_deco_stop_depth_bar(ceiling);
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200 }
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201 else
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202 {
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203 // initial values, upper code might not be executed (is within 150 cm)
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204 }
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205
253
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206 if (ceiling > gSurface_pressure_bar)
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207 {
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208 ceiling = gStop.depth + gSurface_pressure_bar;
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209 // ascend the last meters to first stop (especially consider any gas changes around)
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210 pressure_delta = gPressure - ceiling;
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211 ascend_time = (int) ceil(pressure_delta * 50.0f);
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212 tts_seconds += ascend_with_all_gaschanges(pDiveSettings, pressure_delta);
253
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213 }
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214 // NDL check
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215 if(ceiling <= gSurface_pressure_bar)
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216 {
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217 // NDL with GF_low
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218 pDecoInfo->output_time_to_surface_seconds = 0;
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219 return;
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220 }
253
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221 if (ceiling > pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero)
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222 pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero = ceiling;
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223
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224 // calc gf loop
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225 if(deco_reached)
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226 gGF_low_depth_bar = pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero - gSurface_pressure_bar;
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227 else
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228 gGF_low_depth_bar = ceiling - gSurface_pressure_bar;
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229
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230 while(gStop.depth > 0)
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231 {
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232 do
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233 {
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234 next_depth = next_stop_depth_input_is_actual_stop_id(pDiveSettings, gStop.id);
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235 gGF_value = get_gf_at_pressure(pDiveSettings, next_depth + gSurface_pressure_bar);
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236 buehlmann_backup_and_restore(true);
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237 ascend_time = ascend_with_all_gaschanges(pDiveSettings, gStop.depth - next_depth);
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238 ceiling = tissue_tolerance();
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239 /* pre check actual limit */
258
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240 if(pDecoInfo->output_stop_length_seconds[gStop.id] >= 999*60)
38
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241 {
258
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242 tts_seconds -= 999*60 - pDecoInfo->output_stop_length_seconds[gStop.id];
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243 pDecoInfo->output_stop_length_seconds[gStop.id] = 999*60;
38
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244 }
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245 else
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246 /* more deco on the actual depth */
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247 if(ceiling > next_depth + gSurface_pressure_bar)
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248 {
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249 next_depth = -1;
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250 buehlmann_backup_and_restore(false);
255
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251 decom_tissues_exposure2(10, &pDiveSettings->decogaslist[gGas_id], gPressure,gTissue_nitrogen_bar,gTissue_helium_bar); // some seconds at least at each stop
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252 decom_oxygen_calculate_cns_exposure(10, &pDiveSettings->decogaslist[gGas_id], gPressure, &gCNS);
258
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253 pDecoInfo->output_stop_length_seconds[gStop.id] += 10;
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254 tts_seconds += 10;
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255 }
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256 } while(next_depth == -1);
253
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257 tts_seconds += ascend_time;
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258 gStop.depth = next_depth;
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259 for(i = gGas_id + 1; i < BUEHLMANN_STRUCT_MAX_GASES; i++)
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260 {
255
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261 if(pDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero == 0)
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262 break;
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263 float pressureChange = ((float)pDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero) / 10;
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264 if(gStop.depth <= pressureChange + 0.00001f)
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265 {
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266 gGas_id = i;
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267 }
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268 else
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269 {
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270 break;
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271 }
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272 }
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273 gStop.id--;
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274 }
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275
258
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276 pDecoInfo->output_time_to_surface_seconds = tts_seconds;
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277 }
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278
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279
253
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280 static float tissue_tolerance(void)
38
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281 {
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282 float tissue_inertgas_saturation;
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283 float inertgas_a;
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284 float inertgas_b;
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285 float ceiling;
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286 float global_ceiling;
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287 int ci;
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288
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289 global_ceiling = -1;
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290
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291 for (ci = 0; ci < 16; ci++)
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292 {
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293 if(gTissue_helium_bar[ci] == 0)
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294 {
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295 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci];
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296 //
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297 inertgas_a = buehlmann_N2_a[ci];
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298 inertgas_b = buehlmann_N2_b[ci];
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299 }
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300 else
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301 {
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302 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci] + gTissue_helium_bar[ci];
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303 //
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304 inertgas_a = ( ( buehlmann_N2_a[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_a[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation;
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305 inertgas_b = ( ( buehlmann_N2_b[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_b[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation;
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306 }
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307 //
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308 ceiling = (inertgas_b * ( tissue_inertgas_saturation - gGF_value * inertgas_a ) ) / (gGF_value - (inertgas_b * gGF_value) + inertgas_b);
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309 if(ceiling > global_ceiling)
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310 global_ceiling = ceiling;
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311 }
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312 return global_ceiling;
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313 }
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314
246
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315 void buehlmann_super_saturation_calculator(SLifeData* pLifeData, SDecoinfo * pDecoInfo)
38
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316 {
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317 float tissue_inertgas_saturation;
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318 float inertgas_a;
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heinrichsweikamp
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319 float inertgas_b;
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heinrichsweikamp
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320 float ceiling;
246
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321 float super_saturation;
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parents: 224
diff changeset
322 float pres_respiration = pLifeData->pressure_ambient_bar;
38
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heinrichsweikamp
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323 int ci;
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324
246
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diff changeset
325 pDecoInfo->super_saturation = 0;
38
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heinrichsweikamp
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326
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327 for (ci = 0; ci < 16; ci++)
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328 {
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329 if(gTissue_helium_bar[ci] == 0)
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330 {
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331 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci];
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332 inertgas_a = buehlmann_N2_a[ci];
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333 inertgas_b = buehlmann_N2_b[ci];
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334 }
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335 else
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336 {
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337 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci] + gTissue_helium_bar[ci];
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338 inertgas_a = ( ( buehlmann_N2_a[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_a[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation;
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339 inertgas_b = ( ( buehlmann_N2_b[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_b[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation;
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340 }
246
ff0d23625cd5 feature: replace Relative GF by saturation, computational only
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diff changeset
341
ff0d23625cd5 feature: replace Relative GF by saturation, computational only
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parents: 224
diff changeset
342 ceiling = pres_respiration / inertgas_b + inertgas_a;
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Jan Mulder <jlmulder@xs4all.nl>
parents: 224
diff changeset
343 if(tissue_inertgas_saturation > pres_respiration)
38
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344 {
246
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diff changeset
345 super_saturation =
ff0d23625cd5 feature: replace Relative GF by saturation, computational only
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346 (tissue_inertgas_saturation - pres_respiration) / (ceiling - pres_respiration);
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parents: 224
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347
ff0d23625cd5 feature: replace Relative GF by saturation, computational only
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parents: 224
diff changeset
348 if (super_saturation > pDecoInfo->super_saturation)
ff0d23625cd5 feature: replace Relative GF by saturation, computational only
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349 pDecoInfo->super_saturation = super_saturation;
38
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350 }
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heinrichsweikamp
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351 }
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352 }
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353
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354
253
1663b3b204d7 Buehlmann: cleanup, whitespace, static
Jan Mulder <jlmulder@xs4all.nl>
parents: 250
diff changeset
355 static float buehlmann_tissue_test_tolerance(float depth_in_bar_absolute)
38
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356 {
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357 float tissue_inertgas_saturation;
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358 float inertgas_a;
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359 float inertgas_b;
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360 float inertgas_tolerance;
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361 float gf_minus_1;
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362
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363 gf_minus_1 = gGF_value - 1.0f;
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364
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365 for (int ci = 0; ci < 16; ci++)
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366 {
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367 if(gTissue_helium_bar[ci] == 0)
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368 {
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369 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci];
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370 inertgas_a = buehlmann_N2_a[ci];
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371 inertgas_b = buehlmann_N2_b[ci];
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372 }
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373 else
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parents:
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374 {
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375 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci] + gTissue_helium_bar[ci];
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376 inertgas_a = ( ( buehlmann_N2_a[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_a[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation;
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heinrichsweikamp
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377 inertgas_b = ( ( buehlmann_N2_b[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_b[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation;
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378 }
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379 inertgas_tolerance = ( (gGF_value / inertgas_b - gf_minus_1) * depth_in_bar_absolute ) + ( gGF_value * inertgas_a );
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
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380 if(inertgas_tolerance < tissue_inertgas_saturation)
250
822416168585 Buelmann: new implementation for ceiling
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
diff changeset
381 return tissue_inertgas_saturation - inertgas_tolerance; // positive
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
382 }
250
822416168585 Buelmann: new implementation for ceiling
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
diff changeset
383 return tissue_inertgas_saturation - inertgas_tolerance; // negative
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
384 }
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heinrichsweikamp
parents:
diff changeset
385
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heinrichsweikamp
parents:
diff changeset
386
255
dcf7a3435fe1 Buehlmann: cleanup, factor out pBuDiveSettings
Jan Mulder <jlmulder@xs4all.nl>
parents: 254
diff changeset
387 static void ambient_bar_to_deco_stop_depth_bar(SDiveSettings *pDiveSettings, float ceiling)
38
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heinrichsweikamp
parents:
diff changeset
388 {
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heinrichsweikamp
parents:
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389 int i;
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heinrichsweikamp
parents:
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390
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parents:
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391 ceiling -= gSurface_pressure_bar;
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heinrichsweikamp
parents:
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392
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heinrichsweikamp
parents:
diff changeset
393 if(ceiling <= 0)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
394 {
255
dcf7a3435fe1 Buehlmann: cleanup, factor out pBuDiveSettings
Jan Mulder <jlmulder@xs4all.nl>
parents: 254
diff changeset
395 gStop.depth = pDiveSettings->last_stop_depth_bar;
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
396 gStop.id = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
397 return;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
398 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
399
255
dcf7a3435fe1 Buehlmann: cleanup, factor out pBuDiveSettings
Jan Mulder <jlmulder@xs4all.nl>
parents: 254
diff changeset
400 if((ceiling - pDiveSettings->last_stop_depth_bar) <= 0)
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
401 {
255
dcf7a3435fe1 Buehlmann: cleanup, factor out pBuDiveSettings
Jan Mulder <jlmulder@xs4all.nl>
parents: 254
diff changeset
402 gStop.depth = pDiveSettings->last_stop_depth_bar;
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
403 gStop.id = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
404 return;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
405 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
406
255
dcf7a3435fe1 Buehlmann: cleanup, factor out pBuDiveSettings
Jan Mulder <jlmulder@xs4all.nl>
parents: 254
diff changeset
407 gStop.depth = pDiveSettings->input_second_to_last_stop_depth_bar;
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
408 gStop.id = 1;
255
dcf7a3435fe1 Buehlmann: cleanup, factor out pBuDiveSettings
Jan Mulder <jlmulder@xs4all.nl>
parents: 254
diff changeset
409 ceiling -= pDiveSettings->input_second_to_last_stop_depth_bar;
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
410
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
411 if(ceiling <= 0)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
412 return;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
413
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
414 for(i = 1; i < (DECOINFO_STRUCT_MAX_STOPS - 2); i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
415 {
255
dcf7a3435fe1 Buehlmann: cleanup, factor out pBuDiveSettings
Jan Mulder <jlmulder@xs4all.nl>
parents: 254
diff changeset
416 ceiling -= pDiveSettings->input_next_stop_increment_depth_bar;
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
417 if(ceiling <= 0)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
418 break;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
419 }
255
dcf7a3435fe1 Buehlmann: cleanup, factor out pBuDiveSettings
Jan Mulder <jlmulder@xs4all.nl>
parents: 254
diff changeset
420 gStop.depth += i * pDiveSettings->input_next_stop_increment_depth_bar;
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
421 gStop.id += i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
422 return;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
423 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
424
255
dcf7a3435fe1 Buehlmann: cleanup, factor out pBuDiveSettings
Jan Mulder <jlmulder@xs4all.nl>
parents: 254
diff changeset
425 static float next_stop_depth_input_is_actual_stop_id(SDiveSettings *pDiveSettings, int actual_id)
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
426 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
427 if(actual_id == 0)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
428 return 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
429
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
430 if(actual_id == 1)
255
dcf7a3435fe1 Buehlmann: cleanup, factor out pBuDiveSettings
Jan Mulder <jlmulder@xs4all.nl>
parents: 254
diff changeset
431 return pDiveSettings->last_stop_depth_bar;
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
432
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
433 actual_id -= 2;
255
dcf7a3435fe1 Buehlmann: cleanup, factor out pBuDiveSettings
Jan Mulder <jlmulder@xs4all.nl>
parents: 254
diff changeset
434 return pDiveSettings->input_second_to_last_stop_depth_bar + (actual_id * pDiveSettings->input_next_stop_increment_depth_bar);
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
435 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
436
255
dcf7a3435fe1 Buehlmann: cleanup, factor out pBuDiveSettings
Jan Mulder <jlmulder@xs4all.nl>
parents: 254
diff changeset
437 static int ascend_with_all_gaschanges(SDiveSettings *pDiveSettings, float pressure_decrease)
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
438 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
439 float pressureTop, pressureTop_tmp, pressureBottom, pressureChange, ascendrate_in_seconds_for_one_bar, pressure_difference;
51
8f8ea3a32e82 Resolved warnings pointing to possible invalid memory access
Ideenmodellierer
parents: 38
diff changeset
440 int time_for_ascend = 0;
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
441 int seconds;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
442 int i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
443
255
dcf7a3435fe1 Buehlmann: cleanup, factor out pBuDiveSettings
Jan Mulder <jlmulder@xs4all.nl>
parents: 254
diff changeset
444 ascendrate_in_seconds_for_one_bar = 60 * 10 / pDiveSettings->ascentRate_meterperminute;
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
445
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
446 if(fabsf(gPressure - gSurface_pressure_bar) < PRESSURE_HALF_METER)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
447 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
448 gPressure = gSurface_pressure_bar;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
449 return 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
450 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
451
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
452 pressureTop = gPressure - pressure_decrease;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
453 if( gSurface_pressure_bar > pressureTop)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
454 pressureTop = gSurface_pressure_bar;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
455 pressureBottom = gPressure;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
456 seconds = 0;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
457 do{
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
458 pressureTop_tmp = pressureTop;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
459 for(i = gGas_id + 1; i < BUEHLMANN_STRUCT_MAX_GASES; i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
460 {
255
dcf7a3435fe1 Buehlmann: cleanup, factor out pBuDiveSettings
Jan Mulder <jlmulder@xs4all.nl>
parents: 254
diff changeset
461 if(pDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero == 0)
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
462 break;
255
dcf7a3435fe1 Buehlmann: cleanup, factor out pBuDiveSettings
Jan Mulder <jlmulder@xs4all.nl>
parents: 254
diff changeset
463 pressureChange = gSurface_pressure_bar + ((float)pDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero) / 10;
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
464 if(pressureBottom <= pressureChange)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
465 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
466 gGas_id = i;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
467 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
468 else
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
469 {
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
470 break;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
471 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
472
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
473 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
474 for(i = gGas_id + 1; i < BUEHLMANN_STRUCT_MAX_GASES; i++)
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
475 {
255
dcf7a3435fe1 Buehlmann: cleanup, factor out pBuDiveSettings
Jan Mulder <jlmulder@xs4all.nl>
parents: 254
diff changeset
476 if(pDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero == 0)
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
477 break;
255
dcf7a3435fe1 Buehlmann: cleanup, factor out pBuDiveSettings
Jan Mulder <jlmulder@xs4all.nl>
parents: 254
diff changeset
478 pressureChange = gSurface_pressure_bar + ((float)pDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero)/ 10;
38
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
479 if((pressureChange < pressureBottom) && (pressureChange > pressureTop))
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
480 {
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481 pressureTop_tmp = pressureChange;
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482 }
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483 }
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484 pressure_difference = pressureBottom - pressureTop_tmp;
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485 if(pressure_difference > 0.0001f)
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486 {
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487 time_for_ascend = (int)ceilf(pressure_difference * ascendrate_in_seconds_for_one_bar);
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488 decom_tissues_exposure_stage_schreiner(time_for_ascend, &pDiveSettings->decogaslist[gGas_id],
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489 pressureBottom, pressureTop_tmp, gTissue_nitrogen_bar, gTissue_helium_bar);
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490 decom_oxygen_calculate_cns_stage_SchreinerStyle(time_for_ascend,&pDiveSettings->decogaslist[gGas_id],
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491 pressureBottom, pressureTop_tmp, &gCNS);
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492 }
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493 pressureBottom = pressureTop_tmp;
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494 seconds += time_for_ascend;
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495 }while(pressureTop_tmp > pressureTop);
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496 gPressure = pressureTop;
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497 return seconds;
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498 }
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499
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500
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diff changeset
501 static float get_gf_at_pressure(SDiveSettings *pDiveSettings, float pressure)
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502 {
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503 float gfSteigung = 0.0f;
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504
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505 if(gGF_low_depth_bar < 0)
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506 gGF_low_depth_bar = PRESSURE_THREE_METER; // just to prevent erratic behaviour if variable is not set
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507
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diff changeset
508 gfSteigung = ((float)(pDiveSettings->gf_high - pDiveSettings->gf_low))/ gGF_low_depth_bar;
38
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509
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510
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511 if((pressure - gSurface_pressure_bar) <= PRESSURE_HALF_METER)
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512 return ((float)pDiveSettings->gf_high) / 100.0f;
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513
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514 if(pressure >= gSurface_pressure_bar + gGF_low_depth_bar)
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515 return ((float)pDiveSettings->gf_low) / 100.0f;
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516
255
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517 return (pDiveSettings->gf_high - gfSteigung * (pressure - gSurface_pressure_bar) )/ 100.0f;
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518 }
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519
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520 #define MAX_NDL 240
257
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521 static int buehlmann_calc_ndl(SDiveSettings *pDiveSettings)
38
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522 {
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523 float local_tissue_nitrogen_bar[16];
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524 float local_tissue_helium_bar[16];
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525 int i;
257
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diff changeset
526 int ndl = 0;
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527
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528 //Check ndl always use gHigh
255
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529 gGF_value = ((float)pDiveSettings->gf_high) / 100.0f;
38
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530 //10 minutes steps
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531 while(ndl < (MAX_NDL * 60))
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532 {
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533 memcpy(local_tissue_nitrogen_bar, gTissue_nitrogen_bar, (4*16));
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534 memcpy(local_tissue_helium_bar, gTissue_helium_bar, (4*16));
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535 //
257
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536 ndl += 600;
255
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diff changeset
537 decom_tissues_exposure2(600, &pDiveSettings->decogaslist[gGas_id], gPressure,gTissue_nitrogen_bar,gTissue_helium_bar);
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diff changeset
538 decom_oxygen_calculate_cns_exposure(600,&pDiveSettings->decogaslist[gGas_id],gPressure,&gCNS);
38
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539 buehlmann_backup_and_restore(true);
255
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540 if(dive1_check_deco(pDiveSettings))
38
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541 {
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542 buehlmann_backup_and_restore(false);
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543 break;
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544 }
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545 buehlmann_backup_and_restore(false);
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546 }
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547
291
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548 if(ndl < (MAX_NDL * 60))
257
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diff changeset
549 ndl -= 600;
38
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550
291
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551 if(ndl > (MAX_NDL/2 * 60))
257
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parents: 256
diff changeset
552 return ndl;
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553
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554 // refine
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555 memcpy(gTissue_nitrogen_bar, local_tissue_nitrogen_bar, (4*16));
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556 memcpy(gTissue_helium_bar, local_tissue_helium_bar, (4*16));
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557
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558 //One minutes step
256
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diff changeset
559 for(i = 0; i < 10; i++)
38
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560 {
257
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diff changeset
561 ndl += 60;
255
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562 decom_tissues_exposure2(60, &pDiveSettings->decogaslist[gGas_id], gPressure,gTissue_nitrogen_bar,gTissue_helium_bar);
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diff changeset
563 decom_oxygen_calculate_cns_exposure(60,&pDiveSettings->decogaslist[gGas_id],gPressure,&gCNS);
38
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564 buehlmann_backup_and_restore(true);
255
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diff changeset
565 if(dive1_check_deco(pDiveSettings))
38
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566 break;
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567 buehlmann_backup_and_restore(false);
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568 }
257
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diff changeset
569 return ndl;
38
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570 }
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571
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572
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573 // ===============================================================================
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574 // dive1_check_deco
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575 /// @brief for NDL calculations
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576 /// 160614 using ceilingOther and not ceiling
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577 // ===============================================================================
255
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578 static _Bool dive1_check_deco(SDiveSettings *pDiveSettings)
38
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579 {
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580 // gGF_value is set in call routine;
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parents:
diff changeset
581 // internes Backup!
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diff changeset
582
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parents:
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583 // calc like in deco
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parents:
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584 float ceiling;
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585 float ceilingOther; // new hw 160614
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586
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587 ceiling = tissue_tolerance();
255
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diff changeset
588 ambient_bar_to_deco_stop_depth_bar(pDiveSettings, ceiling); // this will set gStop.depth :-) (and gStop.id)
38
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589
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590 // set the base for all upcoming parameters
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591 ceilingOther = gStop.depth + gSurface_pressure_bar;
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diff changeset
592
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parents:
diff changeset
593 // modify parameters if there is ascend or parameter fine adjustment
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parents:
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594 if(ceilingOther < (gPressure - PRESSURE_150_CM)) // more than 1.5 meter below ceiling
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parents:
diff changeset
595 {
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parents:
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596 // ascend within 10 mtr to GF_low // speed 12 mtr/min -> 50 sec / 10 mtr; 15 sec / 3 mtr.
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parents:
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597 while(((gPressure - PRESSURE_TEN_METER ) > gSurface_pressure_bar) && (ceiling < (gPressure - PRESSURE_TEN_METER)))
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diff changeset
598 {
255
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diff changeset
599 ascend_with_all_gaschanges(pDiveSettings, PRESSURE_TEN_METER);
38
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diff changeset
600 ceiling = tissue_tolerance();
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601 }
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602 while(((gPressure - PRESSURE_THREE_METER )> gSurface_pressure_bar) && (ceiling < gPressure))
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parents:
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603 {
255
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diff changeset
604 ascend_with_all_gaschanges(pDiveSettings, PRESSURE_THREE_METER);
38
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diff changeset
605 ceiling = tissue_tolerance();
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diff changeset
606 }
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607 }
255
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parents: 254
diff changeset
608 return ceiling > gSurface_pressure_bar;
38
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609 }
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parents:
diff changeset
610
250
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diff changeset
611 // compute ceiling recursively, with a resolution of 10cm. Notice
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diff changeset
612 // that the initial call shall guarantee that the found ceiling
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diff changeset
613 // is between low and high parameters.
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diff changeset
614 static float compute_ceiling(float low, float high)
38
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615 {
250
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parents: 247
diff changeset
616 if ((high - low) < 0.01)
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parents: 247
diff changeset
617 return low;
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parents: 247
diff changeset
618 else {
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diff changeset
619 float next_pressure_absolute = (low + high)/2;
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diff changeset
620 float test_result = buehlmann_tissue_test_tolerance(next_pressure_absolute);
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parents: 247
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621 if (test_result < 0)
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diff changeset
622 return compute_ceiling(low, next_pressure_absolute);
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623 else
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624 return compute_ceiling(next_pressure_absolute, high);
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625 }
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diff changeset
626 }
38
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627
250
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628 void buehlmann_ceiling_calculator(SLifeData *pLifeData, SDecoinfo *pDecoInfo)
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diff changeset
629 {
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630 float ceiling;
224
ceecabfddb57 Bugfix, deco: fix 2 (small) problems with calculated ceiling
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diff changeset
631
261
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parents: 258
diff changeset
632 memcpy(gTissue_nitrogen_bar, pLifeData->tissue_nitrogen_bar, (4*16));
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633 memcpy(gTissue_helium_bar, pLifeData->tissue_helium_bar, (4*16));
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634
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parents: 247
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635 // this is just performance optimizing. The code below runs just fine
822416168585 Buelmann: new implementation for ceiling
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
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636 // without this. There is never a ceiling in NDL deco state
822416168585 Buelmann: new implementation for ceiling
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
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637 if (!pDecoInfo->output_time_to_surface_seconds) {
822416168585 Buelmann: new implementation for ceiling
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
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638 pDecoInfo->output_ceiling_meter = 0;
822416168585 Buelmann: new implementation for ceiling
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
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639 return;
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5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
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640 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
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641
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parents: 247
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642 ceiling = compute_ceiling(pLifeData->pressure_surface_bar, 1.0f + pLifeData->max_depth_meter/10.0f);
822416168585 Buelmann: new implementation for ceiling
Jan Mulder <jlmulder@xs4all.nl>
parents: 247
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643 pDecoInfo->output_ceiling_meter = (ceiling - pLifeData->pressure_surface_bar) * 10.0f;
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heinrichsweikamp
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644 }