annotate Discovery/Src/buehlmann.c @ 344:3f09b283d993 FlightMode_Improvment

Removed not used wireless menu items The support for wireless interface was removed some time ago. Menu structure was still present and is now also removed to get rid of dead code
author ideenmodellierer
date Tue, 01 Oct 2019 19:58:58 +0200
parents 305f251cc981
children b7d93ff6b3b2
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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_without_surface_time < 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 }
255
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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)
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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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heinrichsweikamp
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diff changeset
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
ff0d23625cd5 feature: replace Relative GF by saturation, computational only
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321 float super_saturation;
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Jan Mulder <jlmulder@xs4all.nl>
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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diff changeset
324
246
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diff changeset
325 pDecoInfo->super_saturation = 0;
38
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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
diff changeset
347
ff0d23625cd5 feature: replace Relative GF by saturation, computational only
Jan Mulder <jlmulder@xs4all.nl>
parents: 224
diff changeset
348 if (super_saturation > pDecoInfo->super_saturation)
ff0d23625cd5 feature: replace Relative GF by saturation, computational only
Jan Mulder <jlmulder@xs4all.nl>
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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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heinrichsweikamp
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352 }
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heinrichsweikamp
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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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heinrichsweikamp
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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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parents:
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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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parents:
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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
parents:
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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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parents:
diff changeset
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:
diff changeset
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 }
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
385
5f11787b4f42 include in ostc4 repository
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;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
390
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heinrichsweikamp
parents:
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391 ceiling -= gSurface_pressure_bar;
5f11787b4f42 include in ostc4 repository
heinrichsweikamp
parents:
diff changeset
392
5f11787b4f42 include in ostc4 repository
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
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479 if((pressureChange < pressureBottom) && (pressureChange > pressureTop))
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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;
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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
291
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520 #define MAX_NDL 240
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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 //
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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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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;
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550
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551 if(ndl > (MAX_NDL/2 * 60))
257
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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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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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diff changeset
581 // internes Backup!
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diff changeset
582
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parents:
diff changeset
583 // calc like in deco
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parents:
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584 float ceiling;
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diff changeset
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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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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595 {
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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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597 while(((gPressure - PRESSURE_TEN_METER ) > gSurface_pressure_bar) && (ceiling < (gPressure - PRESSURE_TEN_METER)))
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diff changeset
598 {
255
dcf7a3435fe1 Buehlmann: cleanup, factor out pBuDiveSettings
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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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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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606 }
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607 }
255
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diff changeset
608 return ceiling > gSurface_pressure_bar;
38
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609 }
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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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parents: 247
diff changeset
613 // is between low and high parameters.
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parents: 247
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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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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629 {
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diff changeset
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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635 // this is just performance optimizing. The code below runs just fine
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636 // without this. There is never a ceiling in NDL deco state
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637 if (!pDecoInfo->output_time_to_surface_seconds) {
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638 pDecoInfo->output_ceiling_meter = 0;
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639 return;
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640 }
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641
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642 ceiling = compute_ceiling(pLifeData->pressure_surface_bar, 1.0f + pLifeData->max_depth_meter/10.0f);
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643 pDecoInfo->output_ceiling_meter = (ceiling - pLifeData->pressure_surface_bar) * 10.0f;
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644 }