Mercurial > public > ostc4
annotate Discovery/Src/buehlmann.c @ 251:90cbeee0e1d4
Merged in janlmulder/ostc4/bm-2 (pull request #17)
Buelmann: new implementation for ceiling
| author | heinrichsweikamp <bitbucket@heinrichsweikamp.com> |
|---|---|
| date | Fri, 12 Apr 2019 07:22:14 +0000 |
| parents | 822416168585 |
| children | 1663b3b204d7 |
| rev | line source |
|---|---|
|
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1 /* getrennte Gase f�r die verschiedenen Modi |
|
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Resolved warnings pointing to possible invalid memory access
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2 um Gaswechsel Eintr�ge zu vereinfachen |
| 38 | 3 das heisst: |
| 4 oc == bailout in cc mode | |
| 5 */ | |
| 6 | |
| 7 /* Konvention: | |
| 8 float extExample_variable_can_be_used_with_extern; | |
| 9 */ | |
| 10 | |
| 11 #include <string.h> | |
| 12 //#include "arm_math.h" | |
| 13 #include <math.h> | |
| 14 #include <stdbool.h> | |
| 15 #include "buehlmann.h" | |
| 16 #include "decom.h" | |
| 17 | |
| 18 | |
| 19 extern const float buehlmann_N2_a[]; | |
| 20 extern const float buehlmann_N2_b[]; | |
| 21 extern const float buehlmann_He_a[]; | |
| 22 extern const float buehlmann_He_b[]; | |
| 23 | |
| 24 | |
| 25 /* | |
| 26 typedef struct | |
| 27 { | |
| 28 float *pointer_array_tissue_nitrogen_bar; | |
| 29 float *pointer_array_tissue_helium_bar; | |
| 30 char gf_value; | |
| 31 | |
| 32 float output_ceiling_ambient_bar_or_input; | |
| 33 _Bool output_ceiling_tolerated_if_ceiling_used_as_input; | |
| 34 } tissue_test_tolerance_struct; | |
| 35 */ | |
| 36 typedef struct | |
| 37 { | |
| 38 float depth; | |
| 39 int id; | |
| 40 } SStop; | |
| 41 | |
| 42 #define DECO_STOPS_MAX_TTS_CALCULATON_IN_SECONDS 59940 // 999 minuten; before: 18000 // 5(h) * 60(min) * 60 sec = 18000 sec | |
| 43 #define DECO_STOPS_MAX_TTS_FOR_EVERY_SECOND_CALC_IN_SECONDS 7200 | |
| 44 #define NINETY_NINE_MINUTES_IN_SECONDS 59940 | |
| 45 | |
| 46 # define PRESSURE_TEN_METER 1.0f | |
| 47 # define PRESSURE_THREE_METER 0.333334f | |
| 48 # define PRESSURE_150_CM 0.15f | |
| 49 # define PRESSURE_HALF_METER 0.05f | |
| 50 /* | |
| 51 # define PRESSURE_150_CM_MBAR 150 | |
| 52 # define PRESSURE_TWO_M_MBAR 200 | |
| 53 # define PRESSURE_FIVE_M_MBAR 500 | |
| 54 # define PRESSURE_TEN_M_MBAR 1000 | |
| 55 # define PRESSURE_120_METER 12.0 | |
| 56 */ | |
| 57 /* | |
| 58 _____________________________________________________________ | |
| 59 */ | |
| 60 | |
| 61 | |
| 62 void buehlmann_backup_and_restore(_Bool backup_restore_otherwise); | |
| 63 float tissue_tolerance(void); | |
| 64 void ambient_bar_to_deco_stop_depth_bar(float ceiling); | |
| 65 int ascend_with_all_gaschanges(float pressure_decrease); | |
| 66 float next_stop_depth_input_is_actual_stop_id(int actual_id); | |
| 67 float get_gf_at_pressure(float pressure); | |
| 68 void buehlmann_calc_ndl(void); | |
| 69 _Bool dive1_check_deco(void); | |
| 70 | |
| 71 /* | |
| 72 _____________________________________________________________ | |
| 73 */ | |
| 74 | |
| 75 SDecoinfo gDecotable; | |
| 76 float gSurface_pressure_bar; | |
| 77 float gPressure; | |
| 78 int gGas_id; | |
| 79 float gTTS; | |
| 80 float gTissue_nitrogen_bar[16]; | |
| 81 float gTissue_helium_bar[16]; | |
|
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82 float gGF_value; |
| 38 | 83 float gCNS; |
| 84 //float gMax_ceiling_bar = 0; | |
| 85 int gNDL; | |
| 86 | |
| 87 | |
| 88 //SLifeData *pLifeData; | |
| 89 SDiveSettings *pBuDiveSettings; | |
| 90 SDecoinfo* pDecolistBuehlmann; | |
| 91 //signed char gGaschange_decreasing_depth_gas_id[BUEHLMANN_STRUCT_MAX_GASES]; | |
| 92 float gGF_low_depth_bar; | |
| 93 SStop gStop; | |
| 94 | |
| 95 void buehlmann_init(void) | |
| 96 { | |
| 97 //gMax_ceiling_bar = 0; | |
| 98 } | |
| 99 | |
| 100 void buehlmann_backup_and_restore(_Bool backup_restore_otherwise) | |
| 101 { | |
| 102 static float pressure; | |
| 103 static float gas_id; | |
| 104 static float tts; | |
| 105 static float tissue_nitrogen_bar[16]; | |
| 106 static float tissue_helium_bar[16]; | |
| 107 static float gf_value; | |
| 108 static int ndl; | |
| 109 static float cns; | |
| 110 | |
| 111 if(backup_restore_otherwise) | |
| 112 { | |
| 113 pressure = gPressure; | |
| 114 gas_id = gGas_id; | |
| 115 tts = gTTS; | |
| 116 gf_value = gGF_value; | |
| 117 ndl = gNDL; | |
| 118 cns = gCNS; | |
| 119 memcpy(tissue_nitrogen_bar, gTissue_nitrogen_bar, (4*16)); | |
| 120 memcpy(tissue_helium_bar, gTissue_helium_bar, (4*16)); | |
| 121 } | |
| 122 else | |
| 123 { | |
| 124 gPressure = pressure; | |
| 125 gGas_id = gas_id; | |
| 126 gTTS = tts; | |
| 127 gGF_value = gf_value; | |
| 128 gNDL = ndl; | |
| 129 gCNS = cns; | |
| 130 memcpy(gTissue_nitrogen_bar, tissue_nitrogen_bar, (4*16)); | |
| 131 memcpy(gTissue_helium_bar, tissue_helium_bar, (4*16)); | |
| 132 } | |
| 133 | |
| 134 } | |
| 135 /*void buehlmann__test__saturate_tissues(SBuehlmann *pInput, int seconds) | |
| 136 { | |
| 137 pBuehlmann = pInput; | |
| 138 pInput->dive_time_seconds += seconds; | |
| 139 // internal copying | |
| 140 gSurface_pressure_bar = pBuehlmann->pressure_surface_bar; | |
| 141 | |
| 142 gPressure = pBuehlmann->pressure_ambient_bar; | |
| 143 gGas_id = pBuehlmann->actual_gas_id; | |
| 144 memcpy(gTissue_nitrogen_bar, pBuehlmann->tissue_nitrogen_bar, (4*16)); | |
| 145 memcpy(gTissue_helium_bar, pBuehlmann->tissue_helium_bar, (4*16)); | |
| 146 | |
| 147 tissues_exposure_at_gPressure_seconds(seconds); | |
| 148 | |
| 149 memcpy(pBuehlmann->tissue_nitrogen_bar, gTissue_nitrogen_bar, (4*16)); | |
| 150 memcpy(pBuehlmann->tissue_helium_bar, gTissue_helium_bar, (4*16)); | |
| 151 }*/ | |
| 152 | |
| 153 float buehlmann_get_gCNS(void) | |
| 154 { | |
| 155 return gCNS; | |
| 156 } | |
| 157 | |
| 158 void buehlmann_calc_deco(SLifeData* pLifeData, SDiveSettings * pDiveSettings, SDecoinfo * pDecoInfo) | |
| 159 { | |
| 160 float ceiling; | |
| 161 int ascend_time; | |
| 162 int tts_seconds; | |
| 163 float pressure_delta; | |
| 164 float next_depth; | |
| 165 _Bool deco_reached = false; | |
| 166 // tissue_test_tolerance_struct tolerance_data; | |
| 167 unsigned short *stoplist; | |
| 168 int i; | |
| 169 | |
| 170 // decom_CreateGasChangeList(pDiveSettings, pLifeData); | |
| 171 | |
| 172 gCNS = 0; | |
| 173 pDecoInfo->output_time_to_surface_seconds = 0; | |
| 174 pDecoInfo->output_ndl_seconds = 0; | |
| 175 for(int i=0;i<DECOINFO_STRUCT_MAX_STOPS;i++) | |
| 176 { | |
| 177 pDecoInfo->output_stop_length_seconds[i] = 0; | |
| 178 } | |
| 179 /* make input available global*/ | |
| 180 pBuDiveSettings = pDiveSettings; | |
| 181 | |
| 182 pDecolistBuehlmann = pDecoInfo; | |
| 183 /* internal copying */ | |
| 184 gSurface_pressure_bar = pLifeData->pressure_surface_bar; | |
| 185 | |
| 186 gPressure = pLifeData->pressure_ambient_bar; | |
| 187 gGas_id = 0; | |
| 188 memcpy(gTissue_nitrogen_bar, pLifeData->tissue_nitrogen_bar, (4*16)); | |
| 189 memcpy(gTissue_helium_bar, pLifeData->tissue_helium_bar, (4*16)); | |
| 190 gGF_value = ((float)pBuDiveSettings->gf_low) / 100.0f; | |
| 191 | |
| 192 // | |
| 193 memcpy(&gDecotable, pDecolistBuehlmann, sizeof(SDecoinfo)); | |
| 194 stoplist = gDecotable.output_stop_length_seconds; | |
| 195 | |
| 196 | |
| 197 if(pLifeData->dive_time_seconds < 60) | |
| 198 return; | |
| 199 /* coupling */ | |
| 200 | |
| 201 /* functions */ | |
| 202 | |
| 203 // clean stop list | |
| 204 for(i = 0; i < DECOINFO_STRUCT_MAX_STOPS; i++) | |
| 205 stoplist[i] = 0; | |
| 206 gTTS = 0; | |
| 207 gNDL = 0; | |
| 208 | |
| 209 if(pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero >= (gPressure - PRESSURE_150_CM)) | |
| 210 { | |
| 211 deco_reached = true; | |
| 212 } | |
| 213 | |
| 214 | |
| 215 //ascend_with_all_gaschanges(gPressure - gSurface_pressure_bar); | |
| 216 gGF_value = ((float)pBuDiveSettings->gf_high) / 100.0f; | |
| 217 //iling = tissue_tolerance(); | |
| 218 // includes backup for gGF_value | |
| 219 // NDL | |
| 220 buehlmann_backup_and_restore(true); // includes backup for gGF_value | |
| 221 if(!dive1_check_deco() ) | |
| 222 { | |
| 223 buehlmann_backup_and_restore(false); | |
| 224 // no deco | |
| 225 pDecolistBuehlmann->output_time_to_surface_seconds = 0; | |
| 226 for(i = 0; i < DECOINFO_STRUCT_MAX_STOPS; i++) | |
| 227 pDecolistBuehlmann->output_stop_length_seconds[i] = 0; | |
| 228 // calc NDL | |
| 229 buehlmann_calc_ndl(); | |
| 230 pDecolistBuehlmann->output_ndl_seconds = gNDL; | |
| 231 return; | |
| 232 } | |
| 233 buehlmann_backup_and_restore(false); | |
| 234 pDecolistBuehlmann->output_ndl_seconds = 0; | |
| 235 | |
| 236 gGF_value = get_gf_at_pressure(gPressure); | |
| 237 //current ceiling at actual position | |
| 238 ceiling = tissue_tolerance(); | |
| 239 //if(ceiling < pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero) | |
| 240 //ambient_bar_to_deco_stop_depth_bar(pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero); | |
| 241 //else | |
| 242 ambient_bar_to_deco_stop_depth_bar(ceiling); | |
| 243 | |
| 244 // set the base for all upcoming parameters | |
| 245 ceiling = gStop.depth + gSurface_pressure_bar; | |
| 246 tts_seconds = 0; | |
| 247 | |
| 248 // modify parameters if there is ascend or parameter fine adjustment | |
| 249 if(ceiling < (gPressure - PRESSURE_150_CM)) // more than 1.5 meter below ceiling | |
| 250 { | |
| 251 // ascend within 10 mtr to GF_low // speed 12 mtr/min -> 50 sec / 10 mtr; 15 sec / 3 mtr. | |
| 252 if(ceiling < (gPressure - PRESSURE_TEN_METER) ) | |
| 253 { do { | |
| 254 ascend_time = ascend_with_all_gaschanges(PRESSURE_TEN_METER); | |
| 255 tts_seconds += ascend_time; | |
| 256 ceiling = tissue_tolerance(); | |
| 257 if(tts_seconds > DECO_STOPS_MAX_TTS_CALCULATON_IN_SECONDS) | |
| 258 { | |
| 259 /* pInput == pBuehlmann */ | |
| 260 pDecolistBuehlmann->output_time_to_surface_seconds = NINETY_NINE_MINUTES_IN_SECONDS; | |
| 261 return;// NINETY_NINE_MINUTES_IN_SECONDS; | |
| 262 } | |
| 263 } while ((ascend_time > 0 ) && ((gPressure - PRESSURE_TEN_METER ) > gSurface_pressure_bar) && (ceiling < (gPressure - PRESSURE_TEN_METER))); | |
| 264 } | |
| 265 do { | |
| 266 buehlmann_backup_and_restore(true); | |
| 267 ascend_time = ascend_with_all_gaschanges(PRESSURE_THREE_METER); | |
| 268 tts_seconds += ascend_time; | |
| 269 ceiling = tissue_tolerance(); | |
| 270 if(tts_seconds > DECO_STOPS_MAX_TTS_CALCULATON_IN_SECONDS) | |
| 271 { | |
| 272 /* pInput == pBuehlmann */ | |
| 273 pDecolistBuehlmann->output_time_to_surface_seconds = NINETY_NINE_MINUTES_IN_SECONDS; | |
| 274 return;// NINETY_NINE_MINUTES_IN_SECONDS; | |
| 275 } | |
| 276 ambient_bar_to_deco_stop_depth_bar(ceiling); | |
| 277 } while ((ascend_time > 0 ) && ((gStop.depth + gSurface_pressure_bar) < gPressure)); | |
| 278 | |
| 279 if(gStop.depth + gSurface_pressure_bar > gPressure) | |
| 280 { | |
| 281 gPressure += PRESSURE_THREE_METER; | |
| 282 buehlmann_backup_and_restore(false); | |
| 283 tts_seconds -= ascend_time; | |
| 284 } | |
| 285 // calculate first stop based on tissue saturation within 10 meters of stop | |
| 286 //ambient_bar_to_deco_stop_depth_bar(ceiling); | |
| 287 } | |
| 288 else | |
| 289 { | |
| 290 // initial values, upper code might not be executed (is within 150 cm) | |
| 291 } | |
| 292 | |
| 293 | |
| 294 | |
| 295 | |
| 296 if(ceiling > gSurface_pressure_bar) | |
| 297 { | |
| 298 | |
| 299 ceiling = gStop.depth + gSurface_pressure_bar; | |
| 300 // ascend the last meters to first stop (especially consider any gas changes around) | |
| 301 pressure_delta = gPressure - ceiling; | |
| 302 ascend_time = (int)ceil(pressure_delta * 50.0f); | |
| 303 tts_seconds += ascend_with_all_gaschanges(pressure_delta); | |
| 304 } | |
| 305 // NDL check | |
| 306 if(ceiling <= gSurface_pressure_bar) | |
| 307 { | |
| 308 /* pInput == pBuehlmann same pointer*/ | |
| 309 // NDL with GF_low | |
| 310 pDecolistBuehlmann->output_time_to_surface_seconds = 0; | |
| 311 return; | |
| 312 } | |
| 313 if(ceiling >pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero) | |
| 314 pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero = ceiling; | |
| 315 | |
| 316 // calc gf loop | |
| 317 if(deco_reached) | |
| 318 gGF_low_depth_bar = pDiveSettings->internal__pressure_first_stop_ambient_bar_as_upper_limit_for_gf_low_otherwise_zero - gSurface_pressure_bar; | |
| 319 else | |
| 320 gGF_low_depth_bar = ceiling - gSurface_pressure_bar; | |
| 321 | |
| 322 while(gStop.depth > 0) | |
| 323 { | |
| 324 do | |
| 325 { | |
| 326 next_depth = next_stop_depth_input_is_actual_stop_id(gStop.id); | |
| 327 gGF_value = get_gf_at_pressure(next_depth + gSurface_pressure_bar); | |
| 328 buehlmann_backup_and_restore(true); | |
| 329 ascend_time = ascend_with_all_gaschanges(gStop.depth - next_depth); | |
| 330 ceiling = tissue_tolerance(); | |
| 331 /* pre check actual limit */ | |
| 332 if(gDecotable.output_stop_length_seconds[gStop.id] >= 999*60) | |
| 333 { | |
| 334 tts_seconds -= 999*60 - gDecotable.output_stop_length_seconds[gStop.id]; | |
| 335 gDecotable.output_stop_length_seconds[gStop.id] = 999*60; | |
| 336 } | |
| 337 else | |
| 338 /* more deco on the actual depth */ | |
| 339 if(ceiling > next_depth + gSurface_pressure_bar) | |
| 340 { | |
| 341 next_depth = -1; | |
| 342 buehlmann_backup_and_restore(false); | |
| 343 decom_tissues_exposure2(10, &pBuDiveSettings->decogaslist[gGas_id], gPressure,gTissue_nitrogen_bar,gTissue_helium_bar); // some seconds at least at each stop | |
| 344 decom_oxygen_calculate_cns_exposure(10, &pBuDiveSettings->decogaslist[gGas_id], gPressure, &gCNS); | |
| 345 gDecotable.output_stop_length_seconds[gStop.id] += 10; | |
| 346 tts_seconds += 10; | |
| 347 } | |
| 348 } while(next_depth == -1); | |
| 349 tts_seconds += ascend_time; | |
| 350 gStop.depth = next_depth; | |
| 351 for(i = gGas_id + 1; i < BUEHLMANN_STRUCT_MAX_GASES; i++) | |
| 352 { | |
| 353 if(pBuDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero == 0) | |
| 354 break; | |
| 355 float pressureChange = ((float)pBuDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero) / 10; | |
| 356 if(gStop.depth <= pressureChange + 0.00001f) | |
| 357 { | |
| 358 gGas_id = i; | |
| 359 } | |
| 360 else | |
| 361 { | |
| 362 break; | |
| 363 } | |
| 364 } | |
| 365 gStop.id--; | |
| 366 } | |
| 367 | |
| 368 gDecotable.output_time_to_surface_seconds = tts_seconds; | |
| 369 memcpy(pDecolistBuehlmann, &gDecotable, sizeof(SDecoinfo)); | |
| 370 } | |
| 371 | |
| 372 | |
| 373 float tissue_tolerance(void) | |
| 374 { | |
| 375 float tissue_inertgas_saturation; | |
| 376 float inertgas_a; | |
| 377 float inertgas_b; | |
| 378 float ceiling; | |
| 379 float global_ceiling; | |
| 380 int ci; | |
| 381 | |
| 382 global_ceiling = -1; | |
| 383 | |
| 384 for (ci = 0; ci < 16; ci++) | |
| 385 { | |
| 386 if(gTissue_helium_bar[ci] == 0) | |
| 387 { | |
| 388 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci]; | |
| 389 // | |
| 390 inertgas_a = buehlmann_N2_a[ci]; | |
| 391 inertgas_b = buehlmann_N2_b[ci]; | |
| 392 } | |
| 393 else | |
| 394 { | |
| 395 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci] + gTissue_helium_bar[ci]; | |
| 396 // | |
| 397 inertgas_a = ( ( buehlmann_N2_a[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_a[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation; | |
| 398 inertgas_b = ( ( buehlmann_N2_b[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_b[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation; | |
| 399 } | |
| 400 // | |
| 401 ceiling = (inertgas_b * ( tissue_inertgas_saturation - gGF_value * inertgas_a ) ) / (gGF_value - (inertgas_b * gGF_value) + inertgas_b); | |
| 402 if(ceiling > global_ceiling) | |
| 403 global_ceiling = ceiling; | |
| 404 } | |
| 405 return global_ceiling; | |
| 406 } | |
| 407 | |
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408 void buehlmann_super_saturation_calculator(SLifeData* pLifeData, SDecoinfo * pDecoInfo) |
| 38 | 409 { |
| 410 float tissue_inertgas_saturation; | |
| 411 float inertgas_a; | |
| 412 float inertgas_b; | |
| 413 float ceiling; | |
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414 float super_saturation; |
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415 float pres_respiration = pLifeData->pressure_ambient_bar; |
| 38 | 416 int ci; |
| 417 | |
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418 pDecoInfo->super_saturation = 0; |
| 38 | 419 |
| 420 for (ci = 0; ci < 16; ci++) | |
| 421 { | |
| 422 if(gTissue_helium_bar[ci] == 0) | |
| 423 { | |
| 424 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci]; | |
| 425 inertgas_a = buehlmann_N2_a[ci]; | |
| 426 inertgas_b = buehlmann_N2_b[ci]; | |
| 427 } | |
| 428 else | |
| 429 { | |
| 430 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci] + gTissue_helium_bar[ci]; | |
| 431 inertgas_a = ( ( buehlmann_N2_a[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_a[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation; | |
| 432 inertgas_b = ( ( buehlmann_N2_b[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_b[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation; | |
| 433 } | |
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434 |
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435 ceiling = pres_respiration / inertgas_b + inertgas_a; |
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436 if(tissue_inertgas_saturation > pres_respiration) |
| 38 | 437 { |
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438 super_saturation = |
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439 (tissue_inertgas_saturation - pres_respiration) / (ceiling - pres_respiration); |
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440 |
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441 if (super_saturation > pDecoInfo->super_saturation) |
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442 pDecoInfo->super_saturation = super_saturation; |
| 38 | 443 } |
| 444 } | |
| 445 } | |
| 446 | |
| 447 | |
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448 float buehlmann_tissue_test_tolerance(float depth_in_bar_absolute) |
| 38 | 449 { |
| 450 float tissue_inertgas_saturation; | |
| 451 float inertgas_a; | |
| 452 float inertgas_b; | |
| 453 float inertgas_tolerance; | |
| 454 float gf_minus_1; | |
| 455 | |
| 456 gf_minus_1 = gGF_value - 1.0f; | |
| 457 | |
| 458 for (int ci = 0; ci < 16; ci++) | |
| 459 { | |
| 460 if(gTissue_helium_bar[ci] == 0) | |
| 461 { | |
| 462 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci]; | |
| 463 inertgas_a = buehlmann_N2_a[ci]; | |
| 464 inertgas_b = buehlmann_N2_b[ci]; | |
| 465 } | |
| 466 else | |
| 467 { | |
| 468 tissue_inertgas_saturation = gTissue_nitrogen_bar[ci] + gTissue_helium_bar[ci]; | |
| 469 inertgas_a = ( ( buehlmann_N2_a[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_a[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation; | |
| 470 inertgas_b = ( ( buehlmann_N2_b[ci] * gTissue_nitrogen_bar[ci]) + ( buehlmann_He_b[ci] * gTissue_helium_bar[ci]) ) / tissue_inertgas_saturation; | |
| 471 } | |
| 472 inertgas_tolerance = ( (gGF_value / inertgas_b - gf_minus_1) * depth_in_bar_absolute ) + ( gGF_value * inertgas_a ); | |
| 473 if(inertgas_tolerance < tissue_inertgas_saturation) | |
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474 return tissue_inertgas_saturation - inertgas_tolerance; // positive |
| 38 | 475 } |
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476 return tissue_inertgas_saturation - inertgas_tolerance; // negative |
| 38 | 477 } |
| 478 | |
| 479 | |
| 480 void ambient_bar_to_deco_stop_depth_bar(float ceiling) | |
| 481 { | |
| 482 int i; | |
| 483 | |
| 484 ceiling -= gSurface_pressure_bar; | |
| 485 | |
| 486 if(ceiling <= 0) | |
| 487 { | |
| 488 gStop.depth = pBuDiveSettings->last_stop_depth_bar; | |
| 489 gStop.id = 0; | |
| 490 return; | |
| 491 } | |
| 492 | |
| 493 | |
| 494 //for(int i = 1; i < 10; i++) | |
| 495 | |
| 496 if((ceiling - pBuDiveSettings->last_stop_depth_bar) <= 0) | |
| 497 { | |
| 498 gStop.depth = pBuDiveSettings->last_stop_depth_bar; | |
| 499 gStop.id = 0; | |
| 500 return; | |
| 501 } | |
| 502 | |
| 503 gStop.depth = pBuDiveSettings->input_second_to_last_stop_depth_bar; | |
| 504 gStop.id = 1; | |
| 505 ceiling -= pBuDiveSettings->input_second_to_last_stop_depth_bar; | |
| 506 | |
| 507 if(ceiling <= 0) | |
| 508 return; | |
| 509 | |
| 510 for(i = 1; i < (DECOINFO_STRUCT_MAX_STOPS - 2); i++) | |
| 511 { | |
| 512 ceiling -= pBuDiveSettings->input_next_stop_increment_depth_bar; | |
| 513 if(ceiling <= 0) | |
| 514 break; | |
| 515 } | |
| 516 gStop.depth += i * pBuDiveSettings->input_next_stop_increment_depth_bar; | |
| 517 gStop.id += i; | |
| 518 return; | |
| 519 } | |
| 520 | |
| 521 float next_stop_depth_input_is_actual_stop_id(int actual_id) | |
| 522 { | |
| 523 if(actual_id == 0) | |
| 524 return 0; | |
| 525 | |
| 526 if(actual_id == 1) | |
| 527 return pBuDiveSettings->last_stop_depth_bar; | |
| 528 | |
| 529 actual_id -= 2; | |
| 530 return pBuDiveSettings->input_second_to_last_stop_depth_bar + (actual_id * pBuDiveSettings->input_next_stop_increment_depth_bar); | |
| 531 } | |
| 532 | |
| 533 int ascend_with_all_gaschanges(float pressure_decrease) | |
| 534 { | |
| 535 float pressureTop, pressureTop_tmp, pressureBottom, pressureChange, ascendrate_in_seconds_for_one_bar, pressure_difference; | |
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536 int time_for_ascend = 0; |
| 38 | 537 int seconds; |
| 538 int i; | |
| 539 | |
| 540 ascendrate_in_seconds_for_one_bar = 60 * 10 / pBuDiveSettings->ascentRate_meterperminute; | |
| 541 | |
| 542 if(fabsf(gPressure - gSurface_pressure_bar) < PRESSURE_HALF_METER) | |
| 543 { | |
| 544 gPressure = gSurface_pressure_bar; | |
| 545 return 0; | |
| 546 } | |
| 547 | |
| 548 pressureTop = gPressure - pressure_decrease; | |
| 549 if( gSurface_pressure_bar > pressureTop) | |
| 550 pressureTop = gSurface_pressure_bar; | |
| 551 pressureBottom = gPressure; | |
| 552 seconds = 0; | |
| 553 do{ | |
| 554 pressureTop_tmp = pressureTop; | |
| 555 for(i = gGas_id + 1; i < BUEHLMANN_STRUCT_MAX_GASES; i++) | |
| 556 { | |
| 557 if(pBuDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero == 0) | |
| 558 break; | |
| 559 pressureChange = gSurface_pressure_bar + ((float)pBuDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero) / 10; | |
| 560 if(pressureBottom <= pressureChange) | |
| 561 { | |
| 562 gGas_id = i; | |
| 563 } | |
| 564 else | |
| 565 { | |
| 566 break; | |
| 567 } | |
| 568 | |
| 569 } | |
| 570 for(i = gGas_id + 1; i < BUEHLMANN_STRUCT_MAX_GASES; i++) | |
| 571 { | |
| 572 if(pBuDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero == 0) | |
| 573 break; | |
| 574 pressureChange = gSurface_pressure_bar + ((float)pBuDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero)/ 10; | |
| 575 if((pressureChange < pressureBottom) && (pressureChange > pressureTop)) | |
| 576 { | |
| 577 pressureTop_tmp = pressureChange; | |
| 578 } | |
| 579 } | |
| 580 pressure_difference = pressureBottom - pressureTop_tmp; | |
| 581 if(pressure_difference > 0.0001f) | |
| 582 { | |
| 583 time_for_ascend = (int)ceilf(pressure_difference * ascendrate_in_seconds_for_one_bar); | |
| 584 decom_tissues_exposure_stage_schreiner(time_for_ascend, &pBuDiveSettings->decogaslist[gGas_id], | |
| 585 pressureBottom, pressureTop_tmp, gTissue_nitrogen_bar, gTissue_helium_bar); | |
| 586 decom_oxygen_calculate_cns_stage_SchreinerStyle(time_for_ascend,&pBuDiveSettings->decogaslist[gGas_id], | |
| 587 pressureBottom, pressureTop_tmp, &gCNS); | |
| 588 } | |
| 589 pressureBottom = pressureTop_tmp; | |
| 590 seconds += time_for_ascend; | |
| 591 }while(pressureTop_tmp > pressureTop); | |
| 592 gPressure = pressureTop; | |
| 593 return seconds; | |
| 594 } | |
| 595 | |
| 596 | |
| 597 float get_gf_at_pressure(float pressure) | |
| 598 { | |
| 599 float gfSteigung = 0.0f; | |
| 600 | |
| 601 if(gGF_low_depth_bar < 0) | |
| 602 gGF_low_depth_bar = PRESSURE_THREE_METER; // just to prevent erratic behaviour if variable is not set | |
| 603 | |
| 604 gfSteigung = ((float)(pBuDiveSettings->gf_high - pBuDiveSettings->gf_low))/ gGF_low_depth_bar; | |
| 605 | |
| 606 | |
| 607 if((pressure - gSurface_pressure_bar) <= PRESSURE_HALF_METER) | |
| 608 return ((float)pBuDiveSettings->gf_high) / 100.0f; | |
| 609 | |
| 610 if(pressure >= gSurface_pressure_bar + gGF_low_depth_bar) | |
| 611 return ((float)pBuDiveSettings->gf_low) / 100.0f; | |
| 612 | |
| 613 return (pBuDiveSettings->gf_high - gfSteigung * (pressure - gSurface_pressure_bar) )/ 100.0f; | |
| 614 } | |
| 615 | |
| 616 | |
| 617 void buehlmann_calc_ndl(void) | |
| 618 { | |
| 619 float local_tissue_nitrogen_bar[16]; | |
| 620 float local_tissue_helium_bar[16]; | |
| 621 int i; | |
| 622 | |
| 623 gNDL = 0; | |
| 624 //Check ndl always use gHigh | |
| 625 gGF_value = ((float)pBuDiveSettings->gf_high) / 100.0f; | |
| 626 //10 minutes steps | |
| 627 while(gNDL < (300 * 60)) | |
| 628 { | |
| 629 memcpy(local_tissue_nitrogen_bar, gTissue_nitrogen_bar, (4*16)); | |
| 630 memcpy(local_tissue_helium_bar, gTissue_helium_bar, (4*16)); | |
| 631 // | |
| 632 gNDL += 600; | |
| 633 decom_tissues_exposure2(600, &pBuDiveSettings->decogaslist[gGas_id], gPressure,gTissue_nitrogen_bar,gTissue_helium_bar); | |
| 634 decom_oxygen_calculate_cns_exposure(600,&pBuDiveSettings->decogaslist[gGas_id],gPressure,&gCNS); | |
| 635 //tissues_exposure_at_gPressure_seconds(600); | |
| 636 buehlmann_backup_and_restore(true); | |
| 637 if(dive1_check_deco() == true) | |
| 638 { | |
| 639 buehlmann_backup_and_restore(false); | |
| 640 break; | |
| 641 } | |
| 642 buehlmann_backup_and_restore(false); | |
| 643 } | |
| 644 | |
| 645 if(gNDL < (300 * 60)) | |
| 646 gNDL -= 600; | |
| 647 | |
| 648 if(gNDL > (150 * 60)) | |
| 649 return; | |
| 650 | |
| 651 // refine | |
| 652 memcpy(gTissue_nitrogen_bar, local_tissue_nitrogen_bar, (4*16)); | |
| 653 memcpy(gTissue_helium_bar, local_tissue_helium_bar, (4*16)); | |
| 654 | |
| 655 //One minutes step | |
| 656 for(i = 0; i < 20; i++) | |
| 657 { | |
| 658 gNDL += 60; | |
| 659 //tissues_exposure_at_gPressure_seconds(60); | |
| 660 decom_tissues_exposure2(60, &pBuDiveSettings->decogaslist[gGas_id], gPressure,gTissue_nitrogen_bar,gTissue_helium_bar); | |
| 661 decom_oxygen_calculate_cns_exposure(60,&pBuDiveSettings->decogaslist[gGas_id],gPressure,&gCNS); | |
| 662 buehlmann_backup_and_restore(true); | |
| 663 if(dive1_check_deco() == true) | |
| 664 break; | |
| 665 buehlmann_backup_and_restore(false); | |
| 666 } | |
| 667 //gNDL -= 60; | |
| 668 return; | |
| 669 } | |
| 670 | |
| 671 | |
| 672 // =============================================================================== | |
| 673 // dive1_check_deco | |
| 674 /// @brief for NDL calculations | |
| 675 /// 160614 using ceilingOther and not ceiling | |
| 676 // =============================================================================== | |
| 677 _Bool dive1_check_deco(void) | |
| 678 { | |
| 679 // gGF_value is set in call routine; | |
| 680 // internes Backup! | |
| 681 | |
| 682 // calc like in deco | |
| 683 float ceiling; | |
| 684 float ceilingOther; // new hw 160614 | |
| 685 | |
| 686 ceiling = tissue_tolerance(); | |
| 687 ambient_bar_to_deco_stop_depth_bar(ceiling); // this will set gStop.depth :-) (and gStop.id) | |
| 688 | |
| 689 // set the base for all upcoming parameters | |
| 690 ceilingOther = gStop.depth + gSurface_pressure_bar; | |
| 691 | |
| 692 // modify parameters if there is ascend or parameter fine adjustment | |
| 693 if(ceilingOther < (gPressure - PRESSURE_150_CM)) // more than 1.5 meter below ceiling | |
| 694 { | |
| 695 // ascend within 10 mtr to GF_low // speed 12 mtr/min -> 50 sec / 10 mtr; 15 sec / 3 mtr. | |
| 696 while(((gPressure - PRESSURE_TEN_METER ) > gSurface_pressure_bar) && (ceiling < (gPressure - PRESSURE_TEN_METER))) | |
| 697 { | |
| 698 ascend_with_all_gaschanges(PRESSURE_TEN_METER); | |
| 699 ceiling = tissue_tolerance(); | |
| 700 } | |
| 701 while(((gPressure - PRESSURE_THREE_METER )> gSurface_pressure_bar) && (ceiling < gPressure)) | |
| 702 { | |
| 703 ascend_with_all_gaschanges(PRESSURE_THREE_METER); | |
| 704 ceiling = tissue_tolerance(); | |
| 705 } | |
| 706 } | |
| 707 if(ceiling <= gSurface_pressure_bar) | |
| 708 return false; | |
| 709 else | |
| 710 return true; | |
| 711 } | |
| 712 | |
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713 // compute ceiling recursively, with a resolution of 10cm. Notice |
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714 // that the initial call shall guarantee that the found ceiling |
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715 // is between low and high parameters. |
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716 static float compute_ceiling(float low, float high) |
| 38 | 717 { |
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718 if ((high - low) < 0.01) |
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719 return low; |
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720 else { |
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721 float next_pressure_absolute = (low + high)/2; |
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722 float test_result = buehlmann_tissue_test_tolerance(next_pressure_absolute); |
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723 if (test_result < 0) |
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724 return compute_ceiling(low, next_pressure_absolute); |
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725 else |
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726 return compute_ceiling(next_pressure_absolute, high); |
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727 } |
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728 } |
| 38 | 729 |
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730 void buehlmann_ceiling_calculator(SLifeData *pLifeData, SDecoinfo *pDecoInfo) |
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731 { |
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732 float ceiling; |
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733 |
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734 // this is just performance optimizing. The code below runs just fine |
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735 // without this. There is never a ceiling in NDL deco state |
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736 if (!pDecoInfo->output_time_to_surface_seconds) { |
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737 pDecoInfo->output_ceiling_meter = 0; |
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738 return; |
| 38 | 739 } |
| 740 | |
| 741 memcpy(gTissue_nitrogen_bar, pLifeData->tissue_nitrogen_bar, (4*16)); | |
| 742 memcpy(gTissue_helium_bar, pLifeData->tissue_helium_bar, (4*16)); | |
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743 |
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744 ceiling = compute_ceiling(pLifeData->pressure_surface_bar, 1.0f + pLifeData->max_depth_meter/10.0f); |
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745 pDecoInfo->output_ceiling_meter = (ceiling - pLifeData->pressure_surface_bar) * 10.0f; |
| 38 | 746 } |