Mercurial > public > ostc4
annotate Discovery/Src/vpm.c @ 100:b364c75005bb kittz
Stable.fix.
author | Dmitry Romanov <kitt@bk.ru> |
---|---|
date | Tue, 27 Nov 2018 12:59:56 +0300 |
parents | 8f8ea3a32e82 |
children | e1d66bc78f9a |
rev | line source |
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38 | 1 /////////////////////////////////////////////////////////////////////////////// |
2 /// -*- coding: UTF-8 -*- | |
3 /// | |
4 /// \file Discovery/Src/vpm.c | |
5 /// \brief critical_volume comment by hw | |
6 /// \author Heinrichs Weikamp, Erik C. Baker | |
7 /// \date 19-April-2014 | |
8 /// | |
9 /// \details | |
10 /// | |
11 /// $Id$ | |
12 /////////////////////////////////////////////////////////////////////////////// | |
13 /// \par Copyright (c) 2014-2018 Heinrichs Weikamp gmbh | |
14 /// | |
15 /// This program is free software: you can redistribute it and/or modify | |
16 /// it under the terms of the GNU General Public License as published by | |
17 /// the Free Software Foundation, either version 3 of the License, or | |
18 /// (at your option) any later version. | |
19 /// | |
20 /// This program is distributed in the hope that it will be useful, | |
21 /// but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 /// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 /// GNU General Public License for more details. | |
24 /// | |
25 /// You should have received a copy of the GNU General Public License | |
26 /// along with this program. If not, see <http://www.gnu.org/licenses/>. | |
27 ////////////////////////////////////////////////////////////////////////////// | |
28 /// \par Varying Permeability Model (VPM) Decompression Program in c (converted from FORTRAN) | |
29 /// | |
30 /// Author: Erik C. Baker | |
31 /// | |
32 /// "DISTRIBUTE FREELY - CREDIT THE AUTHORS" | |
33 /// | |
34 /// This program extends the 1986 VPM algorithm (Yount & Hoffman) to include | |
35 /// mixed gas, repetitive, and altitude diving. Developments to the algorithm | |
36 /// were made by David E. Yount, Eric B. Maiken, and Erik C. Baker over a | |
37 /// period from 1999 to 2001. This work is dedicated in remembrance of | |
38 /// Professor David E. Yount who passed away on April 27, 2000. | |
39 /// | |
40 /// Notes: | |
41 /// 1. This program uses the sixteen (16) half-time compartments of the | |
42 /// Buhlmann ZH-L16 model. The optional Compartment 1b is used here with | |
43 /// half-times of 1.88 minutes for helium and 5.0 minutes for nitrogen. | |
44 /// | |
45 /// 2. This program uses various DEC, IBM, and Microsoft extensions which | |
46 /// may not be supported by all FORTRAN compilers. Comments are made with | |
47 /// a capital "C" in the first column or an exclamation point "!" placed | |
48 /// in a line after code. An asterisk "*" in column 6 is a continuation | |
49 /// of the previous line. All code, except for line numbers, starts in | |
50 /// column 7. | |
51 /// | |
52 /// 3. Comments and suggestions for improvements are welcome. Please | |
53 /// respond by e-mail to: EBaker@se.aeieng.com | |
54 /// | |
55 /// Acknowledgment: Thanks to Kurt Spaugh for recommendations on how to clean | |
56 /// up the code. | |
57 /// =============================================================================== | |
58 /// Converted to vpmdeco.c using f2c; R.McGinnis (CABER Swe) 5/01 | |
59 /// =============================================================================== | |
60 /// | |
61 /// ************************ Heirichs Weipkamp ************************************** | |
62 /// | |
63 /// The original Yount & Baker code has been adjusted for real life calculation. | |
64 /// | |
65 /// 1) The original main function has been split in several functions | |
66 /// | |
67 /// 2) When the deco zone is reached (while ascending) the gradient factors are kept fix | |
68 /// and critical volume algorithm is switched of. maxfirststopdepth is kept fix | |
69 /// to make shure Boeyls Law algorithm works correctly | |
70 /// | |
71 /// 4) gas_loadings_ascent_descend heeds all gaschanges and CCR support has been added | |
72 /// | |
73 | |
74 #include <stdio.h> | |
75 #include <stdlib.h> | |
76 #include <string.h> | |
77 #include <math.h> | |
78 #include <time.h> | |
79 | |
80 //#include "compiler.h" | |
81 //#include "sdramc.h" | |
82 #include "vpm.h" | |
83 //#include "buehlmann.h" | |
84 | |
85 #include "decom.h" | |
86 | |
87 //#include "decompression.h" | |
88 //#include "taskmanagement\tissue_calls.h" | |
89 #define true 1 | |
90 #define false 0 | |
91 | |
92 #define GAS_N2 0 | |
93 #define GAS_HE 1 | |
94 /* temp vars to simplify UNFMTLISTs */ | |
95 float fO2, fHe, fN2; | |
96 float dc, rc, ssc; | |
97 short mc; | |
98 | |
99 const _Bool buehlmannSafety = true; | |
100 /* Common Block Declarations */ | |
101 | |
102 extern const float SURFACE_TENSION_GAMMA; //!Adj. Range: 0.015 to 0.065 N/m | |
103 extern const float SKIN_COMPRESSION_GAMMAC; //!Adj. Range: 0.160 to 0.290 N/m | |
104 extern const float UNITS_FACTOR; | |
105 extern const float WATER_VAPOR_PRESSURE; // (Schreiner value) based on respiratory quotien | |
106 extern const float CRIT_VOLUME_PARAMETER_LAMBDA; //!Adj. Range: 6500 to 8300 fsw-min | |
107 extern const float GRADIENT_ONSET_OF_IMPERM_ATM; //!Adj. Range: 5.0 to 10.0 atm | |
108 extern const float REGENERATION_TIME_CONSTANT; //!Adj. Range: 10080 to 51840 min | |
109 extern const float PRESSURE_OTHER_GASES_MMHG; //!Constant value for PO2 up to 2 atm | |
110 extern const float CONSTANT_PRESSURE_OTHER_GASES; // PRESSURE_OTHER_GASES_MMHG / 760. * UNITS_FACTOR; | |
111 | |
112 extern const float HELIUM_TIME_CONSTANT[]; | |
113 extern const float NITROGEN_TIME_CONSTANT[]; | |
114 | |
115 float minimum_deco_stop_time; | |
116 float run_time, run_time_first_stop; | |
117 float segment_time; | |
118 short mix_number; | |
119 float barometric_pressure; | |
120 _Bool altitude_dive_algorithm_off; | |
121 _Bool units_equal_fsw, units_equal_msw; | |
122 | |
123 /* by hw 11.06.2015 to allow */ | |
124 float gCNS_VPM; | |
125 | |
126 float helium_pressure[16], nitrogen_pressure[16]; | |
127 //float helium_pressure_crush[16], nitrogen_pressure_crush[16]; | |
128 //float fraction_helium[MAX_GASMIXES + EXTRA_GASMIXES], fraction_nitrogen[MAX_GASMIXES + EXTRA_GASMIXES]; | |
129 //float initial_critical_radius_he[16], initial_critical_radius_n2[16]; | |
130 //float adjusted_critical_radius_he[16], | |
131 //adjusted_critical_radius_n2[16]; | |
132 //float max_crushing_pressure_he[16], | |
133 //max_crushing_pressure_n2[16]; | |
134 float surface_phase_volume_time[16]; | |
135 //float max_actual_gradient[16]; | |
136 //float amb_pressure_onset_of_imperm[16], | |
137 //gas_tension_onset_of_imperm[16]; | |
138 //float initial_helium_pressure_global[16], | |
139 //initial_nitrogen_pressure_global[16]; | |
140 float regenerated_radius_he[16], | |
141 regenerated_radius_n2[16]; | |
142 //float adjusted_crushing_pressure_he[16], | |
143 //adjusted_crushing_pressure_n2[16]; | |
144 float allowable_gradient_he[16], | |
145 allowable_gradient_n2[16]; | |
146 //float initial_allowable_gradient_he[16], | |
147 //initial_allowable_gradient_n2[16]; | |
148 | |
149 //_Bool deco_zone_reached; | |
150 _Bool critical_volume_algorithm_off; | |
151 float max_first_stop_depth; | |
152 float max_deco_ceiling_depth; | |
153 long vpm_time_calc_begin = 0; | |
154 //Boylslaw compensation | |
155 float deco_gradient_he[16]; | |
156 float deco_gradient_n2[16]; | |
157 int last_nullzeit; | |
158 int vpm_calc_what; | |
159 int count_critical_volume_iteration; | |
160 short number_of_changes; | |
161 float depth_change[11]; | |
162 float step_size_change[11]; | |
163 float rate_change[11]; | |
164 short mix_change[11]; | |
165 | |
166 const _Bool vpm_b = true; | |
167 | |
168 //extern | |
169 /*extern float tissue_N2_saturation[4][16]; | |
170 extern float tissue_He_saturation[4][16]; | |
171 extern long dv_divetime; | |
172 extern dive_data_t dive_data; | |
173 extern int dive_ambient_pressure_mbar; | |
174 extern long dv_seconds_since_last_dive; | |
175 extern int tts[4];*/ | |
176 extern const float float_buehlmann_N2_factor_expositon_20_seconds[]; | |
177 extern const float float_buehlmann_He_factor_expositon_20_seconds[]; | |
178 extern const float float_buehlmann_N2_factor_expositon_one_minute[]; | |
179 extern const float float_buehlmann_He_factor_expositon_one_minute[]; | |
180 extern const float float_buehlmann_N2_factor_expositon_five_minutes[]; | |
181 extern const float float_buehlmann_He_factor_expositon_five_minutes[]; | |
182 extern const float float_buehlmann_N2_factor_expositon_one_hour[]; | |
183 extern const float float_buehlmann_He_factor_expositon_one_hour[]; | |
184 | |
185 //extern buehlmann_configuration_t buehlmann_config; | |
186 | |
187 extern unsigned char CCR_mode; //0x100 // by tissue_calls.c // uchar | |
188 | |
189 //extern gaschange2_t gaschange_CCR_backup[2][BUEHLMANN_STRUCT_MAX_GASES]; | |
190 | |
191 | |
192 float starting_ambient_pressure_global; | |
193 float ending_ambient_pressure_global; | |
194 float depth_start_of_deco_calc; | |
195 float depth_start_of_deco_zone; | |
196 float first_stop_depth; | |
197 float run_time_start_of_deco_zone; | |
198 | |
199 float r_nint(float *x); | |
200 float r_int(float *x); | |
201 _Bool repetitive_variables_not_valid = false; | |
202 _Bool nullzeit_unter60; | |
203 //enum VPM_CALC_STATUS{CALC_END,CALC_BEGIN,CALC_NULLZEIT }; | |
204 int vpm_calc_status; | |
205 _Bool buehlmann_wait_exceeded = false; | |
206 | |
207 SLifeData* pInput = NULL; | |
208 SVpm* pVpm = NULL; | |
209 SDecoinfo* pDecoInfo = NULL; | |
210 SDiveSettings* pDiveSettings = NULL; | |
211 float r_nint(float *x) | |
212 { | |
213 return( (*x)>=0 ? | |
214 floorf(*x + 0.5f) : -floorf(0.5f - *x) ); | |
215 } | |
216 | |
217 float r_int(float *x) | |
218 { | |
219 return( (*x>0) ? floorf(*x) : -floorf(- *x) ); | |
220 } | |
221 | |
222 /** private functions | |
223 */ | |
224 int onset_of_impermeability(float *starting_ambient_pressure, float *ending_ambient_pressure, float *rate, short *i); | |
225 int radius_root_finder (float *a, float *b, float *c,float *low_bound, float *high_bound, float *ending_radius); | |
226 int nuclear_regeneration(float *dive_time);// clock_(); | |
227 int calc_deco_ceiling(float *deco_ceiling_depth,_Bool fallowablw); | |
228 | |
229 int calc_barometric_pressure(float *altitude); | |
230 //extern /* Subroutine */ int vpm_repetitive_algorithm(); | |
231 //extern /* Subroutine */ int gas_loadings_surface_interval(); | |
232 int critical_volume(float *deco_phase_volume_time); ; | |
233 int calc_start_of_deco_zone(float *starting_depth, float *rate, float *depth_start_of_deco_zone); | |
234 | |
235 int calc_initial_allowable_gradient(void); | |
236 void decompression_stop(float *deco_stop_depth, float *step_size, _Bool final_deco_calculation); | |
237 int gas_loadings_ascent_descen(float* helium_pressure, float* nitrogen_pressure, float starting_depth,float ending_depth, float rate,_Bool check_gas_change); | |
238 | |
239 int calc_surface_phase_volume_time(void); | |
240 int calc_max_actual_gradient(float *deco_stop_depth); | |
241 int projected_ascent(float *starting_depth, float *rate, float *deco_stop_depth, float *step_size); | |
242 void vpm_calc_deco(void); | |
243 int vpm_calc_critcal_volume(_Bool begin,_Bool calc_nulltime); | |
244 int vpm_check_converged(_Bool calc_nulltime); | |
245 int vpm_calc_final_deco(_Bool begin); | |
246 void BOYLES_LAW_COMPENSATION (float* First_Stop_Depth,float * Deco_Stop_Depth,float* Step_Size); | |
247 int vpm_calc_nullzeit(void); | |
248 int vpm_repetitive_algorithm(float *surface_interval_time); | |
249 void vpm_init_1(void); | |
250 | |
251 void vpm_calc_deco_ceiling(void); | |
252 | |
253 //extern /* Subroutine */ int gas_loadings_constant_depth(); | |
254 //extern /* Subroutine */ int vpm_altitude_dive_algorithm(); | |
255 //extern /* Subroutine */ int calc_max_actual_gradient(), | |
256 //projected_ascent(); | |
257 | |
258 void ______X_X_X___________________________________________________________(void); | |
259 | |
260 //#define ARGGG | |
261 | |
262 void vpm_reset_variables(void) | |
263 { | |
264 repetitive_variables_not_valid = true; | |
265 } | |
266 | |
267 void vpm_init_1(void) | |
268 { | |
269 units_equal_msw = true; | |
270 units_equal_fsw = false; | |
271 altitude_dive_algorithm_off= true; //!Options: ON or OFF | |
272 minimum_deco_stop_time=1.0; //!Options: float positive number | |
273 critical_volume_algorithm_off= false; //!Options: ON or OFF | |
274 run_time = 0.; | |
275 //barometric_pressure = dive_data.surface * 10; | |
276 | |
277 //mix_number = dive_data.selected_gas + 1; | |
278 | |
279 max_first_stop_depth = 0; | |
280 max_deco_ceiling_depth = 0; | |
281 //deco_zone_reached = false; | |
282 depth_start_of_deco_calc = 0; | |
283 depth_start_of_deco_zone = 0; | |
284 first_stop_depth = 0; | |
285 run_time_start_of_deco_zone = 0; | |
286 | |
287 gCNS_VPM = 0; | |
288 } | |
289 | |
290 float vpm_get_CNS(void) | |
291 { | |
292 return gCNS_VPM; | |
293 } | |
294 | |
295 int vpm_calc(SLifeData* pINPUT, | |
296 SDiveSettings* pSettings, | |
297 SVpm* pVPM, | |
298 SDecoinfo* | |
299 pDECOINFO, | |
300 int calc_what) | |
301 { | |
302 vpm_init_1(); | |
303 //decom_CreateGasChangeList(pSettings, pINPUT); | |
304 vpm_calc_what = calc_what; | |
305 /**clear decoInfo*/ | |
306 pDECOINFO->output_time_to_surface_seconds = 0; | |
307 pDECOINFO->output_ndl_seconds = 0; | |
308 pDECOINFO->output_ceiling_meter = 0; | |
309 pDECOINFO->output_relative_gradient = 0; | |
310 uint8_t tmp_calc_status; | |
311 for(int i=0;i<DECOINFO_STRUCT_MAX_STOPS;i++) | |
312 { | |
313 pDECOINFO->output_stop_length_seconds[i] = 0; | |
314 } | |
315 | |
316 if(pINPUT->dive_time_seconds < 10) | |
317 { | |
318 vpm_calc_status = CALC_NULLZEIT; | |
319 return vpm_calc_status; | |
320 } | |
321 pVpm = pVPM; | |
322 pInput = pINPUT; | |
323 pDecoInfo = pDECOINFO; | |
324 pDiveSettings = pSettings; | |
325 | |
326 if(vpm_calc_status == CALC_NULLZEIT) | |
327 { | |
328 tmp_calc_status = vpm_calc_nullzeit(); | |
329 } | |
330 else | |
331 { | |
332 tmp_calc_status = CALC_BEGIN; | |
333 } | |
334 //Normal Deco calculation | |
335 if(tmp_calc_status != CALC_NULLZEIT) | |
336 { | |
337 max_first_stop_depth = pVpm->max_first_stop_depth_save; | |
338 run_time_start_of_deco_zone = pVpm->run_time_start_of_deco_zone_save; | |
339 depth_start_of_deco_zone = pVpm->depth_start_of_deco_zone_save; | |
340 for (int i = 0; i < 16; ++i) { | |
341 helium_pressure[i] = pInput->tissue_helium_bar[i] * 10; | |
342 nitrogen_pressure[i] = pInput->tissue_nitrogen_bar[i] * 10; | |
343 } | |
344 vpm_calc_deco(); | |
345 tmp_calc_status = vpm_calc_critcal_volume(true,false); | |
346 if(vpm_calc_what == DECOSTOPS) | |
347 { | |
348 pVpm->max_first_stop_depth_save = max_first_stop_depth; | |
349 pVpm->run_time_start_of_deco_zone_save = run_time_start_of_deco_zone; | |
350 pVpm->depth_start_of_deco_zone_save = depth_start_of_deco_zone; | |
351 } | |
352 } | |
353 | |
354 //Only Decostops not futute stops | |
355 if(vpm_calc_what == DECOSTOPS) | |
356 vpm_calc_status = tmp_calc_status; | |
357 return vpm_calc_status; | |
358 } | |
359 | |
360 void vpm_saturation_after_ascent(SLifeData* input) | |
361 { | |
362 int i = 0; | |
363 for (i = 0; i < 16; ++i) { | |
364 pInput->tissue_helium_bar[i] = helium_pressure[i] / 10; | |
365 pInput->tissue_nitrogen_bar[i] = nitrogen_pressure[i] / 10; | |
366 } | |
367 pInput->pressure_ambient_bar = pInput->pressure_surface_bar; | |
368 } | |
369 /* =============================================================================== */ | |
370 /* NOTE ABOUT PRESSURE UNITS USED IN CALCULATIONS: */ | |
371 /* It is the convention in decompression calculations to compute all gas */ | |
372 /* loadings, absolute pressures, partial pressures, etc., in the units of */ | |
373 /* depth pressure that you are diving - either feet of seawater (fsw) or */ | |
374 /* meters of seawater (msw). This program follows that convention with the */ | |
375 /* the exception that all VPM calculations are performed in SI units (by */ | |
376 /* necessity). Accordingly, there are several conversions back and forth */ | |
377 /* between the diving pressure units and the SI units. */ | |
378 /* =============================================================================== */ | |
379 /* =============================================================================== */ | |
380 /* FUNCTION SUBPROGRAM FOR GAS LOADING CALCULATIONS - ASCENT AND DESCENT */ | |
381 /* =============================================================================== */ | |
382 | |
383 | |
384 | |
385 /* =============================================================================== */ | |
386 /* SUBROUTINE GAS_LOADINGS_ASCENT_DESCENT */ | |
387 /* Purpose: This subprogram applies the Schreiner equation to update the */ | |
388 /* gas loadings (partial pressures of helium and nitrogen) in the half-time */ | |
389 /* compartments due to a linear ascent or descent segment at a constant rate. */ | |
390 /* =============================================================================== */ | |
391 | |
392 int gas_loadings_ascent_descen(float* helium_pressure, | |
393 float* nitrogen_pressure, | |
394 float starting_depth, | |
395 float ending_depth, | |
396 float rate,_Bool check_gas_change) | |
397 { | |
398 short i; | |
399 float initial_inspired_n2_pressure, | |
400 initial_inspired_he_pressure, nitrogen_rate, | |
401 last_run_time, | |
402 starting_ambient_pressure, | |
403 ending_ambient_pressure; | |
404 float initial_helium_pressure[16]; | |
405 float initial_nitrogen_pressure[16]; | |
406 float helium_rate; | |
407 float fraction_helium_begin; | |
408 float fraction_helium_end; | |
409 float fraction_nitrogen_begin; | |
410 float fraction_nitrogen_end; | |
411 float ending_depth_tmp = ending_depth; | |
412 float segment_time_tmp = 0; | |
413 /* loop */ | |
414 /* =============================================================================== */ | |
415 /* CALCULATIONS */ | |
416 /* =============================================================================== */ | |
417 segment_time = (ending_depth_tmp - starting_depth) / rate; | |
418 last_run_time = run_time; | |
419 run_time = last_run_time + segment_time; | |
420 do { | |
421 ending_depth_tmp = ending_depth; | |
422 if (starting_depth > ending_depth && check_gas_change && number_of_changes > 1) | |
423 { | |
424 for (i = 1; i < number_of_changes; ++i) | |
425 { | |
426 if (depth_change[i] < starting_depth && depth_change[i] > ending_depth) | |
427 { | |
428 ending_depth_tmp = depth_change[i]; | |
429 break; | |
430 } | |
431 } | |
432 for (i = 1; i < number_of_changes; ++i) | |
433 { | |
434 if (depth_change[i] >= starting_depth) | |
435 { | |
436 mix_number = mix_change[i]; | |
437 } | |
438 } | |
439 } | |
440 segment_time_tmp = (ending_depth_tmp - starting_depth) / rate; | |
441 ending_ambient_pressure = ending_depth_tmp + barometric_pressure; | |
442 starting_ambient_pressure = starting_depth + barometric_pressure; | |
443 decom_get_inert_gases( starting_ambient_pressure / 10, (&pDiveSettings->decogaslist[mix_number]), &fraction_nitrogen_begin, &fraction_helium_begin ); | |
444 decom_get_inert_gases( ending_ambient_pressure / 10, (&pDiveSettings->decogaslist[mix_number]), &fraction_nitrogen_end, &fraction_helium_end ); | |
445 | |
446 initial_inspired_he_pressure = (starting_ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_helium_begin; | |
447 initial_inspired_n2_pressure = (starting_ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_nitrogen_begin; | |
448 //helium_rate = *rate * fraction_helium[mix_number - 1]; | |
449 helium_rate = ((ending_ambient_pressure - WATER_VAPOR_PRESSURE)* fraction_helium_end - initial_inspired_he_pressure)/segment_time_tmp; | |
450 //nitrogen_rate2 = *rate * fraction_nitrogen[mix_number - 1]; | |
451 nitrogen_rate = ((ending_ambient_pressure - WATER_VAPOR_PRESSURE)* fraction_nitrogen_end - initial_inspired_n2_pressure)/segment_time_tmp; | |
452 | |
453 | |
454 decom_oxygen_calculate_cns_stage_SchreinerStyle(segment_time_tmp,&pDiveSettings->decogaslist[mix_number],starting_ambient_pressure/10,ending_ambient_pressure/10,&gCNS_VPM); | |
455 //if(fabs(nitrogen_rate - nitrogen_rate2) > 0.000001) | |
456 //return -2; | |
457 for (i = 1; i <= 16; ++i) | |
458 { | |
459 initial_helium_pressure[i - 1] = helium_pressure[i - 1]; | |
460 initial_nitrogen_pressure[i - 1] = nitrogen_pressure[i - 1]; | |
461 helium_pressure[i - 1] = | |
462 schreiner_equation__2(&initial_inspired_he_pressure, | |
463 &helium_rate, | |
464 &segment_time, | |
465 &HELIUM_TIME_CONSTANT[i - 1], | |
466 &initial_helium_pressure[i - 1]); | |
467 nitrogen_pressure[i - 1] = | |
468 schreiner_equation__2(&initial_inspired_n2_pressure, | |
469 &nitrogen_rate, | |
470 &segment_time, | |
471 &NITROGEN_TIME_CONSTANT[i - 1], | |
472 &initial_nitrogen_pressure[i - 1]); | |
473 | |
474 //nextround??? | |
475 | |
476 } | |
477 starting_depth = ending_depth_tmp; | |
478 } while(ending_depth_tmp > ending_depth); | |
479 | |
480 return 0; | |
481 } /* gas_loadings_ascent_descen */ | |
482 | |
483 float last_phase_volume_time[16]; | |
484 float n2_pressure_start_of_deco_zone[16]; | |
485 float he_pressure_start_of_deco_zone[16]; | |
486 float phase_volume_time[16]; | |
487 float n2_pressure_start_of_ascent[16]; | |
488 float he_pressure_start_of_ascent[16]; | |
489 float run_time_start_of_deco_calc; | |
490 float starting_depth; | |
491 float last_run_time; | |
492 float deco_phase_volume_time; | |
493 | |
494 float run_time_start_of_ascent; | |
495 | |
496 float rate; | |
497 float step_size; | |
498 _Bool vpm_violates_buehlmann; | |
499 | |
500 void vpm_calc_deco(void) | |
501 { | |
502 /* System generated locals */ | |
503 | |
504 //float deepest_possible_stop_depth; | |
505 // altitude_of_dive, | |
506 short i; | |
507 int j = 0; | |
508 | |
509 // float rounding_operation; | |
510 | |
511 /* =============================================================================== */ | |
512 /* INPUT PARAMETERS TO BE USED FOR STAGED DECOMPRESSION AND SAVE IN ARRAYS. */ | |
513 /* ASSIGN INITAL PARAMETERS TO BE USED AT START OF ASCENT */ | |
514 /* The user has the ability to change mix, ascent rate, and step size in any */ | |
515 /* combination at any depth during the ascent. */ | |
516 /* =============================================================================== */ | |
517 | |
518 run_time = ((float)pInput->dive_time_seconds )/ 60; | |
519 count_critical_volume_iteration = 0; | |
520 number_of_changes = 1; | |
521 | |
522 barometric_pressure = pInput->pressure_surface_bar * 10; | |
523 depth_change[0] =(pInput->pressure_ambient_bar - pInput->pressure_surface_bar)* 10; | |
524 mix_change[0] = 0; | |
525 rate_change[0 ] = -10;// neu 160215 hw, zuvor: -12; | |
526 step_size_change[0] = 3; | |
527 vpm_violates_buehlmann = false; | |
528 | |
529 for (i = 1; i < BUEHLMANN_STRUCT_MAX_GASES; i++) | |
530 { | |
531 depth_change[i] = 0; | |
532 mix_change[i] = 0; | |
533 } | |
534 j = 0; | |
535 | |
536 for (i = 1; i < BUEHLMANN_STRUCT_MAX_GASES; i++) | |
537 { | |
538 if(pDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero >= depth_change[0] + 1) | |
539 continue; | |
540 | |
541 if(pDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero <= 0) | |
542 break; | |
543 | |
544 j++; | |
545 number_of_changes ++; | |
546 depth_change[j] = pDiveSettings->decogaslist[i].change_during_ascent_depth_meter_otherwise_zero ; | |
547 mix_change[j] = i; | |
548 rate_change[j] = -10;// neu 160215 hw, zuvor: -12; | |
549 step_size_change[j] = 3; | |
550 } | |
551 | |
552 starting_depth = depth_change[0] ; | |
553 mix_number = mix_change[0] ; | |
554 rate = rate_change[0]; | |
555 step_size = step_size_change[0]; | |
556 | |
557 for (i = 0; i < 16; ++i) { | |
558 he_pressure_start_of_ascent[i ] = helium_pressure[i]; | |
559 n2_pressure_start_of_ascent[i] = nitrogen_pressure[i]; | |
560 } | |
561 run_time_start_of_ascent = run_time; | |
562 if(starting_depth <= depth_start_of_deco_zone && vpm_calc_what == DECOSTOPS) | |
563 { | |
564 pVpm->deco_zone_reached = true; | |
565 depth_start_of_deco_calc = starting_depth; | |
566 critical_volume_algorithm_off = true; | |
567 } | |
568 else | |
569 { | |
570 //if(deco_zone_reached) | |
571 //{ | |
572 pVpm->deco_zone_reached = false; | |
573 critical_volume_algorithm_off = false; | |
574 //max_first_stop_depth = 0; | |
575 //max_first_stop_depth_save = 0; | |
576 //} | |
577 /* =============================================================================== */ | |
578 /* BEGIN PROCESS OF ASCENT AND DECOMPRESSION */ | |
579 /* First, calculate the regeneration of critical radii that takes place over */ | |
580 /* the dive time. The regeneration time constant has a time scale of weeks */ | |
581 /* so this will have very little impact on dives of normal length, but will */ | |
582 /* have major impact for saturation dives. */ | |
583 /* =============================================================================== */ | |
584 | |
585 nuclear_regeneration(&run_time); | |
586 | |
587 /* =============================================================================== */ | |
588 /* CALCULATE INITIAL ALLOWABLE GRADIENTS FOR ASCENT */ | |
589 /* This is based on the maximum effective crushing pressure on critical radii */ | |
590 /* in each compartment achieved during the dive profile. */ | |
591 /* =============================================================================== */ | |
592 | |
593 calc_initial_allowable_gradient(); | |
594 | |
595 /* =============================================================================== */ | |
596 /* SAVE VARIABLES AT START OF ASCENT (END OF BOTTOM TIME) SINCE THESE WILL */ | |
597 /* BE USED LATER TO COMPUTE THE FINAL ASCENT PROFILE THAT IS WRITTEN TO THE */ | |
598 /* OUTPUT FILE. */ | |
599 /* The VPM uses an iterative process to compute decompression schedules so */ | |
600 /* there will be more than one pass through the decompression loop. */ | |
601 /* =============================================================================== */ | |
602 | |
603 /* =============================================================================== */ | |
604 /* CALCULATE THE DEPTH WHERE THE DECOMPRESSION ZONE BEGINS FOR THIS PROFILE */ | |
605 /* BASED ON THE INITIAL ASCENT PARAMETERS AND WRITE THE DEEPEST POSSIBLE */ | |
606 /* DECOMPRESSION STOP DEPTH TO THE OUTPUT FILE */ | |
607 /* Knowing where the decompression zone starts is very important. Below */ | |
608 /* that depth there is no possibility for bubble formation because there */ | |
609 /* will be no supersaturation gradients. Deco stops should never start */ | |
610 /* below the deco zone. The deepest possible stop deco stop depth is */ | |
611 /* defined as the next "standard" stop depth above the point where the */ | |
612 /* leading compartment enters the deco zone. Thus, the program will not */ | |
613 /* base this calculation on step sizes larger than 10 fsw or 3 msw. The */ | |
614 /* deepest possible stop depth is not used in the program, per se, rather */ | |
615 /* it is information to tell the diver where to start putting on the brakes */ | |
616 /* during ascent. This should be prominently displayed by any deco program. */ | |
617 /* =============================================================================== */ | |
618 | |
619 calc_start_of_deco_zone(&starting_depth, &rate, &depth_start_of_deco_zone); | |
620 /* =============================================================================== */ | |
621 /* TEMPORARILY ASCEND PROFILE TO THE START OF THE DECOMPRESSION ZONE, SAVE */ | |
622 /* VARIABLES AT THIS POINT, AND INITIALIZE VARIABLES FOR CRITICAL VOLUME LOOP */ | |
623 /* The iterative process of the VPM Critical Volume Algorithm will operate */ | |
624 /* only in the decompression zone since it deals with excess gas volume */ | |
625 /* released as a result of supersaturation gradients (not possible below the */ | |
626 /* decompression zone). */ | |
627 /* =============================================================================== */ | |
628 gas_loadings_ascent_descen(helium_pressure,nitrogen_pressure, starting_depth, depth_start_of_deco_zone, rate, true); | |
629 | |
630 run_time_start_of_deco_zone = run_time; | |
631 depth_start_of_deco_calc = depth_start_of_deco_zone; | |
632 | |
633 for (i = 0; i < 16; ++i) | |
634 { | |
635 pVpm->max_actual_gradient[i] = 0.; | |
636 } | |
637 } | |
638 | |
639 for (i = 0; i < 16; ++i) | |
640 { | |
641 surface_phase_volume_time[i] = 0.; | |
642 last_phase_volume_time[i] = 0.; | |
643 he_pressure_start_of_deco_zone[i] = helium_pressure[i]; | |
644 n2_pressure_start_of_deco_zone[i] = nitrogen_pressure[i]; | |
645 //pVpm->max_actual_gradient[i] = 0.; | |
646 } | |
647 run_time_start_of_deco_calc = run_time; | |
648 } | |
649 /* =============================================================================== */ | |
650 /* START OF CRITICAL VOLUME LOOP */ | |
651 /* This loop operates between Lines 50 and 100. If the Critical Volume */ | |
652 /* Algorithm is toggled "off" in the program settings, there will only be */ | |
653 /* one pass through this loop. Otherwise, there will be two or more passes */ | |
654 /* through this loop until the deco schedule is "converged" - that is when a */ | |
655 /* comparison between the phase volume time of the present iteration and the */ | |
656 /* last iteration is less than or equal to one minute. This implies that */ | |
657 /* the volume of released gas in the most recent iteration differs from the */ | |
658 /* "critical" volume limit by an acceptably small amount. The critical */ | |
659 /* volume limit is set by the Critical Volume Parameter Lambda in the program */ | |
660 /* settings (default setting is 7500 fsw-min with adjustability range from */ | |
661 /* from 6500 to 8300 fsw-min according to Bruce Wienke). */ | |
662 /* =============================================================================== */ | |
663 /* L50: */ | |
664 | |
665 float deco_stop_depth; | |
666 int vpm_calc_critcal_volume(_Bool begin, | |
667 _Bool calc_nulltime) | |
668 { /* loop will run continuous there is an exit stateme */ | |
669 | |
670 short i; | |
671 | |
672 float rounding_operation2; | |
673 //float ending_depth; | |
674 float deco_ceiling_depth; | |
675 | |
676 //float deco_time; | |
677 int count = 0; | |
678 _Bool first_stop; | |
679 int dp = 0; | |
680 float tissue_He_saturation[16]; | |
681 float tissue_N2_saturation[16]; | |
682 float vpm_buehlmann_safety_gradient = 1.0f - (((float)pDiveSettings->vpm_conservatism) / 40); | |
683 /* =============================================================================== */ | |
684 /* CALCULATE CURRENT DECO CEILING BASED ON ALLOWABLE SUPERSATURATION */ | |
685 /* GRADIENTS AND SET FIRST DECO STOP. CHECK TO MAKE SURE THAT SELECTED STEP */ | |
686 /* SIZE WILL NOT ROUND UP FIRST STOP TO A DEPTH THAT IS BELOW THE DECO ZONE. */ | |
687 /* =============================================================================== */ | |
688 if(begin) | |
689 { | |
690 if(depth_start_of_deco_calc < max_first_stop_depth ) | |
691 { | |
692 if(vpm_b) | |
693 { | |
694 BOYLES_LAW_COMPENSATION(&max_first_stop_depth, &depth_start_of_deco_calc, &step_size); | |
695 } | |
696 calc_deco_ceiling(&deco_ceiling_depth, false); | |
697 } | |
698 else | |
699 calc_deco_ceiling(&deco_ceiling_depth, true); | |
700 | |
701 | |
702 if (deco_ceiling_depth <= 0.0f) { | |
703 deco_stop_depth = 0.0f; | |
704 } else { | |
705 rounding_operation2 = deco_ceiling_depth / step_size + ( float)0.5f; | |
706 deco_stop_depth = r_nint(&rounding_operation2) * step_size; | |
707 } | |
708 | |
709 // buehlmann safety | |
710 if(buehlmannSafety) | |
711 { | |
712 for (i = 0; i < 16; i++) | |
713 { | |
714 tissue_He_saturation[i] = helium_pressure[i] / 10; | |
715 tissue_N2_saturation[i] = nitrogen_pressure[i] / 10; | |
716 } | |
717 | |
718 if(!decom_tissue_test_tolerance(tissue_N2_saturation, tissue_He_saturation, vpm_buehlmann_safety_gradient, (deco_stop_depth / 10.0f) + pInput->pressure_surface_bar)) | |
719 { | |
720 | |
721 vpm_violates_buehlmann = true; | |
722 do { | |
723 deco_stop_depth += 3; | |
724 } while (!decom_tissue_test_tolerance(tissue_N2_saturation, tissue_He_saturation, vpm_buehlmann_safety_gradient, (deco_stop_depth / 10.0f) + pInput->pressure_surface_bar)); | |
725 } | |
726 } | |
727 | |
728 /* =============================================================================== */ | |
729 /* PERFORM A SEPARATE "PROJECTED ASCENT" OUTSIDE OF THE MAIN PROGRAM TO MAKE */ | |
730 /* SURE THAT AN INCREASE IN GAS LOADINGS DURING ASCENT TO THE FIRST STOP WILL */ | |
731 /* NOT CAUSE A VIOLATION OF THE DECO CEILING. IF SO, ADJUST THE FIRST STOP */ | |
732 /* DEEPER BASED ON STEP SIZE UNTIL A SAFE ASCENT CAN BE MADE. */ | |
733 /* Note: this situation is a possibility when ascending from extremely deep */ | |
734 /* dives or due to an unusual gas mix selection. */ | |
735 /* CHECK AGAIN TO MAKE SURE THAT ADJUSTED FIRST STOP WILL NOT BE BELOW THE */ | |
736 /* DECO ZONE. */ | |
737 /* =============================================================================== */ | |
738 if (deco_stop_depth < depth_start_of_deco_calc) | |
739 { | |
740 projected_ascent(&depth_start_of_deco_calc, &rate, &deco_stop_depth, &step_size); | |
741 } | |
742 | |
743 /*if (deco_stop_depth > depth_start_of_deco_zone) { | |
744 printf("\t\n"); | |
745 printf(fmt_905); | |
746 printf(fmt_900); | |
747 printf("\nPROGRAM TERMINATED\n"); | |
748 exit(1); | |
749 }*/ | |
750 | |
751 /* =============================================================================== */ | |
752 /* HANDLE THE SPECIAL CASE WHEN NO DECO STOPS ARE REQUIRED - ASCENT CAN BE */ | |
753 /* MADE DIRECTLY TO THE SURFACE */ | |
754 /* Write ascent data to output file and exit the Critical Volume Loop. */ | |
755 /* =============================================================================== */ | |
756 | |
757 if (deco_stop_depth == 0.0f) | |
758 { | |
759 if(calc_nulltime) | |
760 { | |
761 return CALC_END; | |
762 } | |
763 if(pVpm->deco_zone_reached) | |
764 { | |
765 for(dp = 0;dp < DECOINFO_STRUCT_MAX_STOPS;dp++) | |
766 { | |
767 pDecoInfo->output_stop_length_seconds[dp] = 0; | |
768 } | |
769 pDecoInfo->output_ndl_seconds = 0; | |
770 /*max_first_stop_depth = 0; | |
771 deco_zone_reached = false; | |
772 depth_start_of_deco_calc = 0; | |
773 depth_start_of_deco_zone = 0; | |
774 first_stop_depth = 0; | |
775 max_first_stop_depth_save = 0; | |
776 depth_start_of_deco_zone_save = 0; | |
777 run_time_start_of_deco_zone_save = 0; | |
778 tts[DECOSTOPS] = 0; | |
779 tts[NULLZEIT] = 0; | |
780 tts[FUTURESTOPS] = 0; | |
781 nullzeit_unter60 = false; | |
782 vpm_calc_status = CALC_NULLZEIT; | |
783 vpm_calc_what = DECOSTOPS; | |
784 float surfacetime = 0; | |
785 vpm_repetitive_algorithm(&surfacetime);*/ | |
786 | |
787 } | |
788 | |
789 return CALC_NULLZEIT; | |
790 /* exit the critical volume l */ | |
791 } | |
792 | |
793 /* =============================================================================== */ | |
794 /* ASSIGN VARIABLES FOR ASCENT FROM START OF DECO ZONE TO FIRST STOP. SAVE */ | |
795 /* FIRST STOP DEPTH FOR LATER USE WHEN COMPUTING THE FINAL ASCENT PROFILE */ | |
796 /* =============================================================================== */ | |
797 deco_stop_depth = fmaxf(deco_stop_depth,(float)pDiveSettings->last_stop_depth_bar * 10); | |
798 starting_depth = depth_start_of_deco_calc; | |
799 first_stop_depth = deco_stop_depth; | |
800 first_stop = true; | |
801 } | |
802 /* =============================================================================== */ | |
803 /* DECO STOP LOOP BLOCK WITHIN CRITICAL VOLUME LOOP */ | |
804 /* This loop computes a decompression schedule to the surface during each */ | |
805 /* iteration of the critical volume loop. No output is written from this */ | |
806 /* loop, rather it computes a schedule from which the in-water portion of the */ | |
807 /* total phase volume time (Deco_Phase_Volume_Time) can be extracted. Also, */ | |
808 /* the gas loadings computed at the end of this loop are used the subroutine */ | |
809 /* which computes the out-of-water portion of the total phase volume time */ | |
810 /* (Surface_Phase_Volume_Time) for that schedule. */ | |
811 | |
812 /* Note that exit is made from the loop after last ascent is made to a deco */ | |
813 /* stop depth that is less than or equal to zero. A final deco stop less */ | |
814 /* than zero can happen when the user makes an odd step size change during */ | |
815 /* ascent - such as specifying a 5 msw step size change at the 3 msw stop! */ | |
816 /* =============================================================================== */ | |
817 | |
818 while(true) /* loop will run continuous there is an break statement */ | |
819 { | |
820 if(starting_depth > deco_stop_depth ) | |
821 gas_loadings_ascent_descen(helium_pressure, nitrogen_pressure, starting_depth, deco_stop_depth, rate,first_stop); | |
822 | |
823 first_stop = false; | |
824 if (deco_stop_depth <= 0.0f) | |
825 { | |
826 break; | |
827 } | |
828 if (number_of_changes > 1) | |
829 { | |
830 int i1 = number_of_changes; | |
831 for (i = 2; i <= i1; ++i) { | |
832 if (depth_change[i - 1] >= deco_stop_depth) | |
833 { | |
834 mix_number = mix_change[i - 1]; | |
835 rate = rate_change[i - 1]; | |
836 step_size = step_size_change[i - 1]; | |
837 } | |
838 } | |
839 } | |
840 if(vpm_b) | |
841 { | |
842 float fist_stop_depth2 = fmaxf(first_stop_depth,max_first_stop_depth); | |
843 BOYLES_LAW_COMPENSATION(&fist_stop_depth2, &deco_stop_depth, &step_size); | |
844 } | |
845 decompression_stop(&deco_stop_depth, &step_size, false); | |
846 starting_depth = deco_stop_depth; | |
847 | |
848 if(deco_stop_depth == (float)pDiveSettings->last_stop_depth_bar * 10) | |
849 deco_stop_depth = 0; | |
850 else | |
851 { | |
852 deco_stop_depth = deco_stop_depth - step_size; | |
853 deco_stop_depth = fmaxf(deco_stop_depth,(float)pDiveSettings->last_stop_depth_bar * 10); | |
854 } | |
855 | |
856 count++; | |
857 //if(count > 14) | |
858 //return CALC_CRITICAL2; | |
859 /* L60: */ | |
860 } | |
861 | |
862 return vpm_check_converged(calc_nulltime); | |
863 } | |
864 /* =============================================================================== */ | |
865 /* COMPUTE TOTAL PHASE VOLUME TIME AND MAKE CRITICAL VOLUME COMPARISON */ | |
866 /* The deco phase volume time is computed from the run time. The surface */ | |
867 /* phase volume time is computed in a subroutine based on the surfacing gas */ | |
868 /* loadings from previous deco loop block. Next the total phase volume time */ | |
869 /* (in-water + surface) for each compartment is compared against the previous */ | |
870 /* total phase volume time. The schedule is converged when the difference is */ | |
871 /* less than or equal to 1 minute in any one of the 16 compartments. */ | |
872 | |
873 /* Note: the "phase volume time" is somewhat of a mathematical concept. */ | |
874 /* It is the time divided out of a total integration of supersaturation */ | |
875 /* gradient x time (in-water and surface). This integration is multiplied */ | |
876 /* by the excess bubble number to represent the amount of free-gas released */ | |
877 /* as a result of allowing a certain number of excess bubbles to form. */ | |
878 /* =============================================================================== */ | |
879 /* end of deco stop loop */ | |
880 | |
881 int vpm_check_converged(_Bool calc_nulltime) | |
882 { | |
883 | |
884 short i; | |
885 float critical_volume_comparison; | |
886 float r1; | |
887 _Bool schedule_converged = false; | |
888 | |
889 | |
890 deco_phase_volume_time = run_time - run_time_start_of_deco_zone; | |
891 calc_surface_phase_volume_time(); | |
892 | |
893 for (i = 1; i <= 16; ++i) | |
894 { | |
895 phase_volume_time[i - 1] = | |
896 deco_phase_volume_time + surface_phase_volume_time[i - 1]; | |
897 critical_volume_comparison = (r1 = phase_volume_time[i - 1] - last_phase_volume_time[i - 1], fabs(r1)); | |
898 | |
899 if (critical_volume_comparison <= 1.0f) | |
900 { | |
901 schedule_converged = true; | |
902 } | |
903 } | |
904 | |
905 /* =============================================================================== */ | |
906 /* CRITICAL VOLUME DECISION TREE BETWEEN LINES 70 AND 99 */ | |
907 /* There are two options here. If the Critical Volume Agorithm setting is */ | |
908 /* "on" and the schedule is converged, or the Critical Volume Algorithm */ | |
909 /* setting was "off" in the first place, the program will re-assign variables */ | |
910 /* to their values at the start of ascent (end of bottom time) and process */ | |
911 /* a complete decompression schedule once again using all the same ascent */ | |
912 /* parameters and first stop depth. This decompression schedule will match */ | |
913 /* the last iteration of the Critical Volume Loop and the program will write */ | |
914 /* the final deco schedule to the output file. */ | |
915 | |
916 /* Note: if the Critical Volume Agorithm setting was "off", the final deco */ | |
917 /* schedule will be based on "Initial Allowable Supersaturation Gradients." */ | |
918 /* If it was "on", the final schedule will be based on "Adjusted Allowable */ | |
919 /* Supersaturation Gradients" (gradients that are "relaxed" as a result of */ | |
920 /* the Critical Volume Algorithm). */ | |
921 | |
922 /* If the Critical Volume Agorithm setting is "on" and the schedule is not */ | |
923 /* converged, the program will re-assign variables to their values at the */ | |
924 /* start of the deco zone and process another trial decompression schedule. */ | |
925 /* =============================================================================== */ | |
926 /* L70: */ | |
927 //Not more than 4 iteration allowed | |
928 count_critical_volume_iteration++; | |
929 if(count_critical_volume_iteration > 4) | |
930 { | |
931 //return CALC_FINAL_DECO; | |
932 if(calc_nulltime) | |
933 return CALC_FINAL_DECO; | |
934 else | |
935 return vpm_calc_final_deco(true); | |
936 } | |
937 if (schedule_converged || critical_volume_algorithm_off) | |
938 { | |
939 | |
940 //return CALC_FINAL_DECO; | |
941 if(calc_nulltime) | |
942 return CALC_FINAL_DECO; | |
943 else | |
944 return vpm_calc_final_deco(true); | |
945 /* final deco schedule */ | |
946 /* exit critical volume l */ | |
947 | |
948 /* =============================================================================== */ | |
949 /* IF SCHEDULE NOT CONVERGED, COMPUTE RELAXED ALLOWABLE SUPERSATURATION */ | |
950 /* GRADIENTS WITH VPM CRITICAL VOLUME ALGORITHM AND PROCESS ANOTHER */ | |
951 /* ITERATION OF THE CRITICAL VOLUME LOOP */ | |
952 /* =============================================================================== */ | |
953 | |
954 } else { | |
955 critical_volume(&deco_phase_volume_time); | |
956 deco_phase_volume_time = 0.; | |
957 run_time = run_time_start_of_deco_calc; | |
958 starting_depth = depth_start_of_deco_calc; | |
959 mix_number = mix_change[0]; | |
960 rate = rate_change[0]; | |
961 step_size = step_size_change[0]; | |
962 for (i = 1; i <= 16; ++i) | |
963 { | |
964 last_phase_volume_time[i - 1] = phase_volume_time[i - 1]; | |
965 helium_pressure[i - 1] = he_pressure_start_of_deco_zone[i - 1]; | |
966 nitrogen_pressure[i - 1] = n2_pressure_start_of_deco_zone[i - 1]; | |
967 } | |
968 if(calc_nulltime) | |
969 return CALC_CRITICAL; | |
970 else | |
971 return vpm_calc_critcal_volume(true, false); | |
972 } | |
973 /* end of critical volume decision */ | |
974 /* L100: */ | |
975 // }/* end of critical vol loop */ | |
976 } | |
977 | |
978 void vpm_calc_deco_ceiling(void) | |
979 { | |
980 | |
981 short i; | |
982 // hw 1601209 float r1; | |
983 // hw 1601209 float stop_time; | |
984 // hw 1601209 int count = 0; | |
985 //static int dp_max; | |
986 //static float surfacetime; | |
987 // _Bool first_stop = false; | |
988 float tissue_He_saturation[16]; | |
989 float tissue_N2_saturation[16]; | |
990 float vpm_buehlmann_safety_gradient = 1.0f - (((float)pDiveSettings->vpm_conservatism) / 40); | |
991 //max_first_stop_depth = fmaxf(first_stop_depth,max_first_stop_depth); | |
992 | |
993 /** CALC DECO Ceiling ******************************************************************/ | |
994 /** Not when Future stops */ | |
995 if(vpm_calc_what == DECOSTOPS) | |
996 { | |
997 | |
998 for (i = 1; i <= 16; ++i) | |
999 { | |
1000 helium_pressure[i - 1] = he_pressure_start_of_deco_zone[i - 1]; | |
1001 nitrogen_pressure[i - 1] = n2_pressure_start_of_deco_zone[i - 1]; | |
1002 } | |
1003 run_time = run_time_start_of_ascent;// run_time_start_of_ascent; | |
1004 starting_depth = depth_change[0]; | |
1005 mix_number = mix_change[0]; | |
1006 rate = rate_change[0]; | |
1007 //gas_loadings_ascent_descen(helium_pressure,nitrogen_pressure, starting_depth, depth_start_of_deco_calc, rate, true); | |
1008 | |
1009 float deco_ceiling_depth = 0.0f; | |
1010 if(depth_start_of_deco_calc > max_deco_ceiling_depth) | |
1011 { | |
1012 calc_deco_ceiling(&deco_ceiling_depth, true); | |
1013 } | |
1014 if(buehlmannSafety) | |
1015 { | |
1016 for (i = 0; i < 16; i++) | |
1017 { | |
1018 tissue_He_saturation[i] = helium_pressure[i] / 10; | |
1019 tissue_N2_saturation[i] = nitrogen_pressure[i] / 10; | |
1020 } | |
1021 | |
1022 if(!decom_tissue_test_tolerance(tissue_N2_saturation, tissue_He_saturation, vpm_buehlmann_safety_gradient, (deco_ceiling_depth / 10.0f) + pInput->pressure_surface_bar)) | |
1023 { | |
1024 | |
1025 vpm_violates_buehlmann = true; | |
1026 do { | |
1027 deco_ceiling_depth += 0.1f; | |
1028 } while (!decom_tissue_test_tolerance(tissue_N2_saturation, tissue_He_saturation, vpm_buehlmann_safety_gradient, (deco_ceiling_depth / 10.0f) + pInput->pressure_surface_bar)); | |
1029 } | |
1030 } | |
1031 | |
1032 if (deco_ceiling_depth < depth_start_of_deco_calc) | |
1033 { | |
1034 projected_ascent(&depth_start_of_deco_calc, &rate, &deco_ceiling_depth, &step_size); | |
1035 } | |
1036 | |
1037 max_deco_ceiling_depth = fmaxf(max_deco_ceiling_depth,deco_ceiling_depth); | |
1038 | |
1039 if(depth_start_of_deco_calc > deco_ceiling_depth) | |
1040 { | |
1041 gas_loadings_ascent_descen(helium_pressure,nitrogen_pressure, depth_start_of_deco_calc,deco_ceiling_depth, rate, true); | |
1042 //surfacetime += segment_time; | |
1043 } | |
1044 | |
1045 if(vpm_b) | |
1046 { | |
1047 BOYLES_LAW_COMPENSATION(&max_deco_ceiling_depth, &deco_ceiling_depth, &step_size); | |
1048 } | |
1049 calc_deco_ceiling(&deco_ceiling_depth, false); | |
1050 | |
1051 // buehlmann safety | |
1052 if(vpm_violates_buehlmann) | |
1053 { | |
1054 for (i = 0; i < 16; i++) | |
1055 { | |
1056 tissue_He_saturation[i] = helium_pressure[i] / 10; | |
1057 tissue_N2_saturation[i] = nitrogen_pressure[i] / 10; | |
1058 } | |
1059 | |
1060 if(!decom_tissue_test_tolerance(tissue_N2_saturation, tissue_He_saturation, vpm_buehlmann_safety_gradient, (deco_ceiling_depth / 10.0f) + pInput->pressure_surface_bar)) | |
1061 { | |
1062 | |
1063 vpm_violates_buehlmann = true; | |
1064 do { | |
1065 deco_ceiling_depth += 0.1f; | |
1066 } while (!decom_tissue_test_tolerance(tissue_N2_saturation, tissue_He_saturation, vpm_buehlmann_safety_gradient, (deco_ceiling_depth / 10.0f) + pInput->pressure_surface_bar)); | |
1067 } | |
1068 } | |
1069 // output_ceiling_meter | |
1070 if(deco_ceiling_depth > first_stop_depth) | |
1071 deco_ceiling_depth = first_stop_depth; | |
1072 pDecoInfo->output_ceiling_meter = deco_ceiling_depth ; | |
1073 } | |
1074 else | |
1075 { | |
1076 pDecoInfo->output_ceiling_meter = 0; | |
1077 } | |
1078 | |
1079 // fix hw 160627 | |
1080 if(pDecoInfo->output_ceiling_meter < 0) | |
1081 pDecoInfo->output_ceiling_meter = 0; | |
1082 | |
1083 /*** End CALC ceiling ***************************************************/ | |
1084 } | |
1085 | |
1086 | |
1087 /* =============================================================================== */ | |
1088 /* DECO STOP LOOP BLOCK FOR FINAL DECOMPRESSION SCHEDULE */ | |
1089 /* =============================================================================== */ | |
1090 | |
1091 int vpm_calc_final_deco(_Bool begin) | |
1092 { | |
1093 short i; | |
1094 float r1; | |
1095 float stop_time; | |
1096 int count = 0; | |
1097 static int dp_max; | |
1098 static float surfacetime; | |
1099 _Bool first_stop = false; | |
1100 // hw 1601209 float tissue_He_saturation[16]; | |
1101 // hw 1601209 float tissue_N2_saturation[16]; | |
1102 float vpm_buehlmann_safety_gradient = 1.0f - (((float)pDiveSettings->vpm_conservatism) / 40); | |
1103 max_first_stop_depth = fmaxf(first_stop_depth,max_first_stop_depth); | |
1104 if(begin) | |
1105 { | |
1106 gCNS_VPM = 0; | |
1107 dp_max = 0; | |
1108 for (i = 1; i <= 16; ++i) | |
1109 { | |
1110 helium_pressure[i - 1] = | |
1111 he_pressure_start_of_ascent[i - 1]; | |
1112 nitrogen_pressure[i - 1] = | |
1113 n2_pressure_start_of_ascent[i - 1]; | |
1114 } | |
1115 run_time = run_time_start_of_ascent;// run_time_start_of_ascent; | |
1116 starting_depth = depth_change[0]; | |
1117 mix_number = mix_change[0]; | |
1118 rate = rate_change[0]; | |
1119 step_size = step_size_change[0]; | |
1120 deco_stop_depth = first_stop_depth; | |
1121 max_first_stop_depth = fmaxf(first_stop_depth,max_first_stop_depth); | |
1122 last_run_time = 0.; | |
1123 | |
1124 | |
1125 | |
1126 /* =============================================================================== */ | |
1127 /* DECO STOP LOOP BLOCK FOR FINAL DECOMPRESSION SCHEDULE */ | |
1128 /* =============================================================================== */ | |
1129 surfacetime = 0; | |
1130 first_stop = true; | |
1131 } | |
1132 | |
1133 while(true) /* loop will run continuous until there is an break statement */ | |
1134 { | |
1135 if(starting_depth > deco_stop_depth) | |
1136 { | |
1137 gas_loadings_ascent_descen(helium_pressure,nitrogen_pressure, starting_depth,deco_stop_depth, rate, first_stop); | |
1138 surfacetime += segment_time; | |
1139 } | |
1140 | |
1141 /* =============================================================================== */ | |
1142 /* DURING FINAL DECOMPRESSION SCHEDULE PROCESS, COMPUTE MAXIMUM ACTUAL */ | |
1143 /* SUPERSATURATION GRADIENT RESULTING IN EACH COMPARTMENT */ | |
1144 /* If there is a repetitive dive, this will be used later in the VPM */ | |
1145 /* Repetitive Algorithm to adjust the values for critical radii. */ | |
1146 /* =============================================================================== */ | |
1147 if(vpm_calc_what == DECOSTOPS) | |
1148 calc_max_actual_gradient(&deco_stop_depth); | |
1149 | |
1150 if (deco_stop_depth <= 0.0f) { | |
1151 break; | |
1152 } | |
1153 if (number_of_changes > 1) | |
1154 { | |
1155 int i1 = number_of_changes; | |
1156 for (i = 2; i <= i1; ++i) | |
1157 { | |
1158 if (depth_change[i - 1] >= deco_stop_depth) | |
1159 { | |
1160 mix_number = mix_change[i - 1]; | |
1161 rate = rate_change[i - 1]; | |
1162 step_size = step_size_change[i - 1]; | |
1163 } | |
1164 } | |
1165 } | |
1166 | |
1167 if(first_stop) | |
1168 { | |
1169 run_time_first_stop = run_time; | |
1170 first_stop = false; | |
1171 } | |
1172 if(vpm_b) | |
1173 { | |
1174 BOYLES_LAW_COMPENSATION(&max_first_stop_depth, &deco_stop_depth, &step_size); | |
1175 } | |
1176 decompression_stop(&deco_stop_depth, &step_size, true); | |
1177 | |
1178 /* =============================================================================== */ | |
1179 /* This next bit justs rounds up the stop time at the first stop to be in */ | |
1180 /* whole increments of the minimum stop time (to make for a nice deco table). */ | |
1181 /* =============================================================================== */ | |
1182 | |
1183 if (last_run_time == 0.0f) | |
1184 { | |
1185 r1 = segment_time / minimum_deco_stop_time + 0.5f; | |
1186 stop_time = r_int(&r1) * minimum_deco_stop_time; | |
1187 } else { | |
1188 stop_time = run_time - last_run_time; | |
1189 } | |
1190 stop_time = segment_time; | |
1191 surfacetime += stop_time; | |
1192 if((vpm_calc_what == DECOSTOPS) || (vpm_calc_what == BAILOUTSTOPS)) | |
1193 { | |
1194 int dp = 0; | |
1195 if(deco_stop_depth == (float)pDiveSettings->last_stop_depth_bar * 10) | |
1196 { | |
1197 dp = 0; | |
1198 } | |
1199 else | |
1200 { | |
1201 dp = 1 + (int)((deco_stop_depth - (pDiveSettings->input_second_to_last_stop_depth_bar * 10)) / step_size); | |
1202 } | |
1203 dp_max = (int)fmaxf(dp_max,dp); | |
1204 if(dp < DECOINFO_STRUCT_MAX_STOPS) | |
1205 { | |
1206 int stop_time_seconds = fminf((999 * 60), (int)(stop_time *60)); | |
1207 // | |
1208 | |
1209 //if(vpm_calc_what == DECOSTOPS) | |
1210 pDecoInfo->output_stop_length_seconds[dp] = (unsigned short)stop_time_seconds; | |
1211 //else | |
1212 //decostop_bailout[dp] = (unsigned short)stop_time_seconds; | |
1213 } | |
1214 } | |
1215 | |
1216 | |
1217 /* =============================================================================== */ | |
1218 /* DURING FINAL DECOMPRESSION SCHEDULE, IF MINIMUM STOP TIME PARAMETER IS A */ | |
1219 /* WHOLE NUMBER (i.e. 1 minute) THEN WRITE DECO SCHEDULE USING short */ | |
1220 /* NUMBERS (looks nicer). OTHERWISE, USE DECIMAL NUMBERS. */ | |
1221 /* Note: per the request of a noted exploration diver(!), program now allows */ | |
1222 /* a minimum stop time of less than one minute so that total ascent time can */ | |
1223 /* be minimized on very long dives. In fact, with step size set at 1 fsw or */ | |
1224 /* 0.2 msw and minimum stop time set at 0.1 minute (6 seconds), a near */ | |
1225 /* continuous decompression schedule can be computed. */ | |
1226 /* =============================================================================== */ | |
1227 | |
1228 starting_depth = deco_stop_depth; | |
1229 if(deco_stop_depth == (float)pDiveSettings->last_stop_depth_bar * 10) | |
1230 deco_stop_depth = 0; | |
1231 else | |
1232 { | |
1233 deco_stop_depth = deco_stop_depth - step_size; | |
1234 deco_stop_depth = fmaxf(deco_stop_depth,(float)pDiveSettings->last_stop_depth_bar * 10); | |
1235 } | |
1236 | |
1237 last_run_time = run_time; | |
1238 count++; | |
1239 //if(count > 14) | |
1240 //return CALC_FINAL_DECO2; | |
1241 /* L80: */ | |
1242 } /* for final deco sche */ | |
1243 | |
1244 if( (vpm_calc_what == DECOSTOPS) || (vpm_calc_what == BAILOUTSTOPS)) | |
1245 { | |
1246 for(int dp = dp_max +1;dp < DECOINFO_STRUCT_MAX_STOPS;dp++) | |
1247 { | |
1248 //if(vpm_calc_what == DECOSTOPS) | |
1249 pDecoInfo->output_stop_length_seconds[dp] = 0; | |
1250 //else | |
1251 //decostop_bailout[dp] = 0; | |
1252 } | |
1253 } | |
1254 pDecoInfo->output_time_to_surface_seconds = (int)(surfacetime * 60); | |
1255 pDecoInfo->output_ndl_seconds = 0; | |
1256 | |
1257 vpm_calc_deco_ceiling(); | |
1258 /* end of deco stop lo */ | |
1259 return CALC_END; | |
1260 } | |
1261 | |
1262 /* =============================================================================== */ | |
1263 /* SUBROUTINE NUCLEAR_REGENERATION */ | |
1264 /* Purpose: This subprogram calculates the regeneration of VPM critical */ | |
1265 /* radii that takes place over the dive time. The regeneration time constant */ | |
1266 /* has a time scale of weeks so this will have very little impact on dives of */ | |
1267 /* normal length, but will have a major impact for saturation dives. */ | |
1268 /* =============================================================================== */ | |
1269 | |
1270 int nuclear_regeneration(float *dive_time) | |
1271 { | |
1272 /* Local variables */ | |
1273 float crush_pressure_adjust_ratio_he, | |
1274 ending_radius_n2, | |
1275 ending_radius_he; | |
1276 short i; | |
1277 float crushing_pressure_pascals_n2, | |
1278 crushing_pressure_pascals_he, | |
1279 adj_crush_pressure_n2_pascals, | |
1280 adj_crush_pressure_he_pascals, | |
1281 crush_pressure_adjust_ratio_n2; | |
1282 | |
1283 /* loop */ | |
1284 /* =============================================================================== */ | |
1285 /* CALCULATIONS */ | |
1286 /* First convert the maximum crushing pressure obtained for each compartment */ | |
1287 /* to Pascals. Next, compute the ending radius for helium and nitrogen */ | |
1288 /* critical nuclei in each compartment. */ | |
1289 /* =============================================================================== */ | |
1290 | |
1291 for (i = 1; i <= 16; ++i) | |
1292 { | |
1293 crushing_pressure_pascals_he = | |
1294 pVpm->max_crushing_pressure_he[i - 1] / UNITS_FACTOR * 101325.0f; | |
1295 crushing_pressure_pascals_n2 = | |
1296 pVpm->max_crushing_pressure_n2[i - 1] / UNITS_FACTOR * 101325.0f; | |
1297 ending_radius_he = | |
1298 1.0f / (crushing_pressure_pascals_he / | |
1299 ((SKIN_COMPRESSION_GAMMAC - SURFACE_TENSION_GAMMA) * 2.0f) + | |
1300 1.0f / pVpm->adjusted_critical_radius_he[i - 1]); | |
1301 ending_radius_n2 = | |
1302 1.0f / (crushing_pressure_pascals_n2 / | |
1303 ((SKIN_COMPRESSION_GAMMAC - SURFACE_TENSION_GAMMA) * 2.0f) + | |
1304 1.0f / pVpm->adjusted_critical_radius_n2[i - 1]); | |
1305 | |
1306 /* =============================================================================== */ | |
1307 /* A "regenerated" radius for each nucleus is now calculated based on the */ | |
1308 /* regeneration time constant. This means that after application of */ | |
1309 /* crushing pressure and reduction in radius, a nucleus will slowly grow */ | |
1310 /* back to its original initial radius over a period of time. This */ | |
1311 /* phenomenon is probabilistic in nature and depends on absolute temperature. */ | |
1312 /* It is independent of crushing pressure. */ | |
1313 /* =============================================================================== */ | |
1314 | |
1315 regenerated_radius_he[i - 1] = | |
1316 pVpm->adjusted_critical_radius_he[i - 1] + | |
1317 (ending_radius_he - pVpm->adjusted_critical_radius_he[i - 1]) * | |
1318 expf(-(*dive_time) / REGENERATION_TIME_CONSTANT); | |
1319 regenerated_radius_n2[i - 1] = | |
1320 pVpm->adjusted_critical_radius_n2[i - 1] + | |
1321 (ending_radius_n2 - pVpm->adjusted_critical_radius_n2[i - 1]) * | |
1322 expf(-(*dive_time) / REGENERATION_TIME_CONSTANT); | |
1323 | |
1324 /* =============================================================================== */ | |
1325 /* In order to preserve reference back to the initial critical radii after */ | |
1326 /* regeneration, an "adjusted crushing pressure" for the nuclei in each */ | |
1327 /* compartment must be computed. In other words, this is the value of */ | |
1328 /* crushing pressure that would have reduced the original nucleus to the */ | |
1329 /* to the present radius had regeneration not taken place. The ratio */ | |
1330 /* for adjusting crushing pressure is obtained from algebraic manipulation */ | |
1331 /* of the standard VPM equations. The adjusted crushing pressure, in lieu */ | |
1332 /* of the original crushing pressure, is then applied in the VPM Critical */ | |
1333 /* Volume Algorithm and the VPM Repetitive Algorithm. */ | |
1334 /* =============================================================================== */ | |
1335 | |
1336 crush_pressure_adjust_ratio_he = | |
1337 ending_radius_he * (pVpm->adjusted_critical_radius_he[i - 1] - | |
1338 regenerated_radius_he[i - 1]) / | |
1339 (regenerated_radius_he[i - 1] * | |
1340 (pVpm->adjusted_critical_radius_he[i - 1] - | |
1341 ending_radius_he)); | |
1342 crush_pressure_adjust_ratio_n2 = | |
1343 ending_radius_n2 * (pVpm->adjusted_critical_radius_n2[i - 1] - | |
1344 regenerated_radius_n2[i - 1]) / | |
1345 (regenerated_radius_n2[i - 1] * | |
1346 (pVpm->adjusted_critical_radius_n2[i - 1] - | |
1347 ending_radius_n2)); | |
1348 adj_crush_pressure_he_pascals = | |
1349 crushing_pressure_pascals_he * crush_pressure_adjust_ratio_he; | |
1350 adj_crush_pressure_n2_pascals = | |
1351 crushing_pressure_pascals_n2 * crush_pressure_adjust_ratio_n2; | |
1352 pVpm->adjusted_crushing_pressure_he[i - 1] = | |
1353 adj_crush_pressure_he_pascals / 101325.0f * UNITS_FACTOR; | |
1354 pVpm->adjusted_crushing_pressure_n2[i - 1] = | |
1355 adj_crush_pressure_n2_pascals / 101325.0f * UNITS_FACTOR; | |
1356 } | |
1357 return 0; | |
1358 } /* nuclear_regeneration */ | |
1359 | |
1360 /* =============================================================================== */ | |
1361 /* SUBROUTINE CALC_INITIAL_ALLOWABLE_GRADIENT */ | |
1362 /* Purpose: This subprogram calculates the initial allowable gradients for */ | |
1363 /* helium and nitrogren in each compartment. These are the gradients that */ | |
1364 /* will be used to set the deco ceiling on the first pass through the deco */ | |
1365 /* loop. If the Critical Volume Algorithm is set to "off", then these */ | |
1366 /* gradients will determine the final deco schedule. Otherwise, if the */ | |
1367 /* Critical Volume Algorithm is set to "on", these gradients will be further */ | |
1368 /* "relaxed" by the Critical Volume Algorithm subroutine. The initial */ | |
1369 /* allowable gradients are referred to as "PssMin" in the papers by Yount */ | |
1370 /* and colleauges, i.e., the minimum supersaturation pressure gradients */ | |
1371 /* that will probe bubble formation in the VPM nuclei that started with the */ | |
1372 /* designated minimum initial radius (critical radius). */ | |
1373 | |
1374 /* The initial allowable gradients are computed directly from the */ | |
1375 /* "regenerated" radii after the Nuclear Regeneration subroutine. These */ | |
1376 /* gradients are tracked separately for helium and nitrogen. */ | |
1377 /* =============================================================================== */ | |
1378 | |
1379 int calc_initial_allowable_gradient() | |
1380 { | |
1381 float initial_allowable_grad_n2_pa, | |
1382 initial_allowable_grad_he_pa; | |
1383 short i; | |
1384 | |
1385 /* loop */ | |
1386 /* =============================================================================== */ | |
1387 /* CALCULATIONS */ | |
1388 /* The initial allowable gradients are computed in Pascals and then converted */ | |
1389 /* to the diving pressure units. Two different sets of arrays are used to */ | |
1390 /* save the calculations - Initial Allowable Gradients and Allowable */ | |
1391 /* Gradients. The Allowable Gradients are assigned the values from Initial */ | |
1392 /* Allowable Gradients however the Allowable Gradients can be changed later */ | |
1393 /* by the Critical Volume subroutine. The values for the Initial Allowable */ | |
1394 /* Gradients are saved in a global array for later use by both the Critical */ | |
1395 /* Volume subroutine and the VPM Repetitive Algorithm subroutine. */ | |
1396 /* =============================================================================== */ | |
1397 | |
1398 for (i = 1; i <= 16; ++i) | |
1399 { | |
1400 initial_allowable_grad_n2_pa = | |
1401 SURFACE_TENSION_GAMMA * 2.0f * | |
1402 (SKIN_COMPRESSION_GAMMAC - SURFACE_TENSION_GAMMA) / | |
1403 (regenerated_radius_n2[i - 1] * SKIN_COMPRESSION_GAMMAC); | |
1404 | |
1405 initial_allowable_grad_he_pa = | |
1406 SURFACE_TENSION_GAMMA * 2.0f * | |
1407 (SKIN_COMPRESSION_GAMMAC - SURFACE_TENSION_GAMMA) / | |
1408 (regenerated_radius_he[i - 1] * SKIN_COMPRESSION_GAMMAC); | |
1409 | |
1410 pVpm->initial_allowable_gradient_n2[i - 1] = | |
1411 initial_allowable_grad_n2_pa / 101325.0f * UNITS_FACTOR; | |
1412 | |
1413 pVpm->initial_allowable_gradient_he[i - 1] = | |
1414 initial_allowable_grad_he_pa / 101325.0f * UNITS_FACTOR; | |
1415 | |
1416 allowable_gradient_he[i - 1] = | |
1417 pVpm->initial_allowable_gradient_he[i - 1]; | |
1418 | |
1419 allowable_gradient_n2[i - 1] = | |
1420 pVpm->initial_allowable_gradient_n2[i - 1]; | |
1421 } | |
1422 return 0; | |
1423 } /* calc_initial_allowable_gradient */ | |
1424 | |
1425 /* =============================================================================== */ | |
1426 /* SUBROUTINE CALC_DECO_CEILING */ | |
1427 /* Purpose: This subprogram calculates the deco ceiling (the safe ascent */ | |
1428 /* depth) in each compartment, based on the allowable gradients, and then */ | |
1429 /* finds the deepest deco ceiling across all compartments. This deepest */ | |
1430 /* value (Deco Ceiling Depth) is then used by the Decompression Stop */ | |
1431 /* subroutine to determine the actual deco schedule. */ | |
1432 /* =============================================================================== */ | |
1433 | |
1434 int calc_deco_ceiling(float *deco_ceiling_depth,_Bool fallowable) | |
1435 { | |
1436 /* System generated locals */ | |
1437 float r1, r2; | |
1438 /* Local variables */ | |
1439 float weighted_allowable_gradient; | |
1440 short i; | |
1441 float compartment_deco_ceiling[16], | |
1442 gas_loading, | |
1443 tolerated_ambient_pressure; | |
1444 float gradient_he, gradient_n2; | |
1445 | |
1446 if(!vpm_b) | |
1447 fallowable = true; | |
1448 /* loop */ | |
1449 /* =============================================================================== */ | |
1450 /* CALCULATIONS */ | |
1451 /* Since there are two sets of allowable gradients being tracked, one for */ | |
1452 /* helium and one for nitrogen, a "weighted allowable gradient" must be */ | |
1453 /* computed each time based on the proportions of helium and nitrogen in */ | |
1454 /* each compartment. This proportioning follows the methodology of */ | |
1455 /* Buhlmann/Keller. If there is no helium and nitrogen in the compartment, */ | |
1456 /* such as after extended periods of oxygen breathing, then the minimum value */ | |
1457 /* across both gases will be used. It is important to note that if a */ | |
1458 /* compartment is empty of helium and nitrogen, then the weighted allowable */ | |
1459 /* gradient formula cannot be used since it will result in division by zero. */ | |
1460 /* =============================================================================== */ | |
1461 | |
1462 for (i = 1; i <= 16; ++i) | |
1463 { | |
1464 | |
1465 // abfrage raus und pointer stattdessen | |
1466 if(fallowable){ | |
1467 gradient_he = allowable_gradient_he[i-1]; | |
1468 gradient_n2 = allowable_gradient_n2[i-1]; | |
1469 } | |
1470 else{ | |
1471 gradient_he = deco_gradient_he[i-1]; | |
1472 gradient_n2 = deco_gradient_n2[i-1]; | |
1473 } | |
1474 | |
1475 gas_loading = helium_pressure[i - 1] + nitrogen_pressure[i - 1]; | |
1476 | |
1477 if (gas_loading > 0) | |
1478 { | |
1479 weighted_allowable_gradient = | |
1480 (gradient_he * helium_pressure[i - 1] + | |
1481 gradient_n2 * nitrogen_pressure[i - 1]) / | |
1482 (helium_pressure[i - 1] + nitrogen_pressure[i - 1]); | |
1483 | |
1484 tolerated_ambient_pressure = | |
1485 gas_loading + | |
1486 CONSTANT_PRESSURE_OTHER_GASES - | |
1487 weighted_allowable_gradient; | |
1488 } | |
1489 else | |
1490 { | |
1491 /* Computing MIN */ | |
1492 r1 = gradient_he; | |
1493 r2 = gradient_n2; | |
1494 weighted_allowable_gradient = fminf(r1,r2); | |
1495 | |
1496 tolerated_ambient_pressure = | |
1497 CONSTANT_PRESSURE_OTHER_GASES - weighted_allowable_gradient; | |
1498 } | |
1499 | |
1500 /* =============================================================================== */ | |
1501 /* The tolerated ambient pressure cannot be less than zero absolute, i.e., */ | |
1502 /* the vacuum of outer space! */ | |
1503 /* =============================================================================== */ | |
1504 | |
1505 if (tolerated_ambient_pressure < 0) { | |
1506 tolerated_ambient_pressure = 0; | |
1507 } | |
1508 compartment_deco_ceiling[i - 1] = | |
1509 tolerated_ambient_pressure - barometric_pressure; | |
1510 } | |
1511 | |
1512 /* =============================================================================== */ | |
1513 /* The Deco Ceiling Depth is computed in a loop after all of the individual */ | |
1514 /* compartment deco ceilings have been calculated. It is important that the */ | |
1515 /* Deco Ceiling Depth (max deco ceiling across all compartments) only be */ | |
1516 /* extracted from the compartment values and not be compared against some */ | |
1517 /* initialization value. For example, if MAX(Deco_Ceiling_Depth . .) was */ | |
1518 /* compared against zero, this could cause a program lockup because sometimes */ | |
1519 /* the Deco Ceiling Depth needs to be negative (but not less than zero */ | |
1520 /* absolute ambient pressure) in order to decompress to the last stop at zero */ | |
1521 /* depth. */ | |
1522 /* =============================================================================== */ | |
1523 | |
1524 *deco_ceiling_depth = compartment_deco_ceiling[0]; | |
1525 for (i = 2; i <= 16; ++i) | |
1526 { | |
1527 /* Computing MAX */ | |
1528 r1 = *deco_ceiling_depth; | |
1529 r2 = compartment_deco_ceiling[i - 1]; | |
1530 *deco_ceiling_depth = fmaxf(r1,r2); | |
1531 } | |
1532 return 0; | |
1533 } /* calc_deco_ceiling */ | |
1534 | |
1535 | |
1536 | |
1537 /* =============================================================================== */ | |
1538 /* SUBROUTINE CALC_MAX_ACTUAL_GRADIENT */ | |
1539 /* Purpose: This subprogram calculates the actual supersaturation gradient */ | |
1540 /* obtained in each compartment as a result of the ascent profile during */ | |
1541 /* decompression. Similar to the concept with crushing pressure, the */ | |
1542 /* supersaturation gradients are not cumulative over a multi-level, staged */ | |
1543 /* ascent. Rather, it will be the maximum value obtained in any one discrete */ | |
1544 /* step of the overall ascent. Thus, the program must compute and store the */ | |
1545 /* maximum actual gradient for each compartment that was obtained across all */ | |
1546 /* steps of the ascent profile. This subroutine is invoked on the last pass */ | |
1547 /* through the deco stop loop block when the final deco schedule is being */ | |
1548 /* generated. */ | |
1549 /* */ | |
1550 /* The max actual gradients are later used by the VPM Repetitive Algorithm to */ | |
1551 /* determine if adjustments to the critical radii are required. If the max */ | |
1552 /* actual gradient did not exceed the initial alllowable gradient, then no */ | |
1553 /* adjustment will be made. However, if the max actual gradient did exceed */ | |
1554 /* the intitial allowable gradient, such as permitted by the Critical Volume */ | |
1555 /* Algorithm, then the critical radius will be adjusted (made larger) on the */ | |
1556 /* repetitive dive to compensate for the bubbling that was allowed on the */ | |
1557 /* previous dive. The use of the max actual gradients is intended to prevent */ | |
1558 /* the repetitive algorithm from being overly conservative. */ | |
1559 /* =============================================================================== */ | |
1560 | |
1561 int calc_max_actual_gradient(float *deco_stop_depth) | |
1562 { | |
1563 /* System generated locals */ | |
1564 float r1; | |
1565 | |
1566 /* Local variables */ | |
1567 short i; | |
1568 float compartment_gradient; | |
1569 | |
1570 /* loop */ | |
1571 /* =============================================================================== */ | |
1572 /* CALCULATIONS */ | |
1573 /* Note: negative supersaturation gradients are meaningless for this */ | |
1574 /* application, so the values must be equal to or greater than zero. */ | |
1575 /* =============================================================================== */ | |
1576 | |
1577 for (i = 1; i <= 16; ++i) | |
1578 { | |
1579 compartment_gradient = | |
1580 helium_pressure[i - 1] + | |
1581 nitrogen_pressure[i - 1] + | |
1582 CONSTANT_PRESSURE_OTHER_GASES - | |
1583 (*deco_stop_depth + barometric_pressure); | |
1584 if (compartment_gradient <= 0.0f) { | |
1585 compartment_gradient = 0.0f; | |
1586 } | |
1587 /* Computing MAX */ | |
1588 r1 = pVpm->max_actual_gradient[i - 1]; | |
1589 pVpm->max_actual_gradient[i - 1] = fmaxf(r1, compartment_gradient); | |
1590 } | |
1591 return 0; | |
1592 } /* calc_max_actual_gradient */ | |
1593 | |
1594 /* =============================================================================== */ | |
1595 /* SUBROUTINE CALC_SURFACE_PHASE_VOLUME_TIME */ | |
1596 /* Purpose: This subprogram computes the surface portion of the total phase */ | |
1597 /* volume time. This is the time factored out of the integration of */ | |
1598 /* supersaturation gradient x time over the surface interval. The VPM */ | |
1599 /* considers the gradients that allow bubbles to form or to drive bubble */ | |
1600 /* growth both in the water and on the surface after the dive. */ | |
1601 | |
1602 /* This subroutine is a new development to the VPM algorithm in that it */ | |
1603 /* computes the time course of supersaturation gradients on the surface */ | |
1604 /* when both helium and nitrogen are present. Refer to separate write-up */ | |
1605 /* for a more detailed explanation of this algorithm. */ | |
1606 /* =============================================================================== */ | |
1607 | |
1608 int calc_surface_phase_volume_time() | |
1609 { | |
1610 /* Local variables */ | |
1611 float decay_time_to_zero_gradient; | |
1612 short i; | |
1613 float integral_gradient_x_time, | |
1614 surface_inspired_n2_pressure; | |
1615 | |
1616 /* loop */ | |
1617 /* =============================================================================== */ | |
1618 /* CALCULATIONS */ | |
1619 /* =============================================================================== */ | |
1620 | |
1621 surface_inspired_n2_pressure = | |
1622 (barometric_pressure - WATER_VAPOR_PRESSURE) * 0.79f; | |
1623 for (i = 1; i <= 16; ++i) | |
1624 { | |
1625 if (nitrogen_pressure[i - 1] > surface_inspired_n2_pressure) | |
1626 { | |
1627 surface_phase_volume_time[i - 1] = | |
1628 (helium_pressure[i - 1] / HELIUM_TIME_CONSTANT[i - 1] + | |
1629 (nitrogen_pressure[i - 1] - surface_inspired_n2_pressure) / | |
1630 NITROGEN_TIME_CONSTANT[i - 1]) / | |
1631 (helium_pressure[i - 1] + nitrogen_pressure[i - 1] - | |
1632 surface_inspired_n2_pressure); | |
1633 } else if (nitrogen_pressure[i - 1] <= surface_inspired_n2_pressure && | |
1634 helium_pressure[i - 1] + nitrogen_pressure[i - 1] >= surface_inspired_n2_pressure) | |
1635 { | |
1636 decay_time_to_zero_gradient = | |
1637 1.0f / (NITROGEN_TIME_CONSTANT[i - 1] - HELIUM_TIME_CONSTANT[i - 1]) * | |
1638 log((surface_inspired_n2_pressure - nitrogen_pressure[i - 1]) / | |
1639 helium_pressure[i - 1]); | |
1640 integral_gradient_x_time = | |
1641 helium_pressure[i - 1] / | |
1642 HELIUM_TIME_CONSTANT[i - 1] * | |
1643 (1.0f - expf(-HELIUM_TIME_CONSTANT[i - 1] * | |
1644 decay_time_to_zero_gradient)) + | |
1645 (nitrogen_pressure[i - 1] - surface_inspired_n2_pressure) / | |
1646 NITROGEN_TIME_CONSTANT[i - 1] * | |
1647 (1.0f - expf(-NITROGEN_TIME_CONSTANT[i - 1] * | |
1648 decay_time_to_zero_gradient)); | |
1649 surface_phase_volume_time[i - 1] = | |
1650 integral_gradient_x_time / | |
1651 (helium_pressure[i - 1] + | |
1652 nitrogen_pressure[i - 1] - | |
1653 surface_inspired_n2_pressure); | |
1654 } else { | |
1655 surface_phase_volume_time[i - 1] = 0.0f; | |
1656 } | |
1657 } | |
1658 return 0; | |
1659 } /* calc_surface_phase_volume_time */ | |
1660 | |
1661 /* =============================================================================== */ | |
1662 /* SUBROUTINE CRITICAL_VOLUME */ | |
1663 /* Purpose: This subprogram applies the VPM Critical Volume Algorithm. This */ | |
1664 /* algorithm will compute "relaxed" gradients for helium and nitrogen based */ | |
1665 /* on the setting of the Critical Volume Parameter Lambda. */ | |
1666 /* =============================================================================== */ | |
1667 | |
1668 int critical_volume(float *deco_phase_volume_time) | |
1669 { | |
1670 /* System generated locals */ | |
1671 float r1; | |
1672 | |
1673 /* Local variables */ | |
1674 float initial_allowable_grad_n2_pa, | |
1675 initial_allowable_grad_he_pa, | |
1676 parameter_lambda_pascals, b, | |
1677 c; | |
1678 short i; | |
1679 float new_allowable_grad_n2_pascals, | |
1680 phase_volume_time[16], | |
1681 new_allowable_grad_he_pascals, | |
1682 adj_crush_pressure_n2_pascals, | |
1683 adj_crush_pressure_he_pascals; | |
1684 | |
1685 /* loop */ | |
1686 /* =============================================================================== */ | |
1687 /* CALCULATIONS */ | |
1688 /* Note: Since the Critical Volume Parameter Lambda was defined in units of */ | |
1689 /* fsw-min in the original papers by Yount and colleauges, the same */ | |
1690 /* convention is retained here. Although Lambda is adjustable only in units */ | |
1691 /* of fsw-min in the program settings (range from 6500 to 8300 with default */ | |
1692 /* 7500), it will convert to the proper value in Pascals-min in this */ | |
1693 /* subroutine regardless of which diving pressure units are being used in */ | |
1694 /* the main program - feet of seawater (fsw) or meters of seawater (msw). */ | |
1695 /* The allowable gradient is computed using the quadratic formula (refer to */ | |
1696 /* separate write-up posted on the Deco List web site). */ | |
1697 /* =============================================================================== */ | |
1698 | |
1699 /** | |
1700 ****************************************************************************** | |
1701 * @brief critical_volume comment by hw | |
1702 * @version V0.0.1 | |
1703 * @date 19-April-2014 | |
1704 * @retval global: allowable_gradient_he[i], allowable_gradient_n2[i] | |
1705 ****************************************************************************** | |
1706 */ | |
1707 | |
1708 parameter_lambda_pascals = | |
1709 CRIT_VOLUME_PARAMETER_LAMBDA / 33.0f * 101325.0f; | |
1710 for (i = 1; i <= 16; ++i) | |
1711 { | |
1712 phase_volume_time[i - 1] = | |
1713 *deco_phase_volume_time + surface_phase_volume_time[i - 1]; | |
1714 } | |
1715 for (i = 1; i <= 16; ++i) | |
1716 { | |
1717 | |
1718 adj_crush_pressure_he_pascals = | |
1719 pVpm->adjusted_crushing_pressure_he[i - 1] / UNITS_FACTOR * 101325.0f; | |
1720 | |
1721 initial_allowable_grad_he_pa = | |
1722 pVpm->initial_allowable_gradient_he[i - 1] / UNITS_FACTOR * 101325.0f; | |
1723 | |
1724 b = initial_allowable_grad_he_pa + parameter_lambda_pascals * | |
1725 SURFACE_TENSION_GAMMA / ( | |
1726 SKIN_COMPRESSION_GAMMAC * phase_volume_time[i - 1]); | |
1727 | |
1728 c = SURFACE_TENSION_GAMMA * ( | |
1729 SURFACE_TENSION_GAMMA * ( | |
1730 parameter_lambda_pascals * adj_crush_pressure_he_pascals)) / | |
1731 (SKIN_COMPRESSION_GAMMAC * | |
1732 (SKIN_COMPRESSION_GAMMAC * phase_volume_time[i - 1])); | |
1733 /* Computing 2nd power */ | |
1734 | |
1735 r1 = b; | |
1736 | |
1737 new_allowable_grad_he_pascals = | |
1738 (b + sqrtf(r1 * r1 - c * 4.0f)) / 2.0f; | |
1739 | |
1740 /* modify global variable */ | |
1741 allowable_gradient_he[i - 1] = | |
1742 new_allowable_grad_he_pascals / 101325.0f * UNITS_FACTOR; | |
1743 } | |
1744 | |
1745 for (i = 1; i <= 16; ++i) | |
1746 { | |
1747 adj_crush_pressure_n2_pascals = | |
1748 pVpm->adjusted_crushing_pressure_n2[i - 1] / UNITS_FACTOR * 101325.0f; | |
1749 | |
1750 initial_allowable_grad_n2_pa = | |
1751 pVpm->initial_allowable_gradient_n2[i - 1] / UNITS_FACTOR * 101325.0f; | |
1752 | |
1753 b = initial_allowable_grad_n2_pa + parameter_lambda_pascals * | |
1754 SURFACE_TENSION_GAMMA / ( | |
1755 SKIN_COMPRESSION_GAMMAC * phase_volume_time[i - 1]); | |
1756 | |
1757 c = SURFACE_TENSION_GAMMA * | |
1758 (SURFACE_TENSION_GAMMA * | |
1759 (parameter_lambda_pascals * adj_crush_pressure_n2_pascals)) / | |
1760 (SKIN_COMPRESSION_GAMMAC * | |
1761 (SKIN_COMPRESSION_GAMMAC * phase_volume_time[i - 1])); | |
1762 /* Computing 2nd power */ | |
1763 | |
1764 r1 = b; | |
1765 | |
1766 new_allowable_grad_n2_pascals = | |
1767 (b + sqrtf(r1 * r1 - c * 4.0f)) / 2.0f; | |
1768 | |
1769 /* modify global variable */ | |
1770 allowable_gradient_n2[i - 1] = | |
1771 new_allowable_grad_n2_pascals / 101325.0f * UNITS_FACTOR; | |
1772 } | |
1773 return 0; | |
1774 } /* critical_volume */ | |
1775 | |
1776 /* =============================================================================== */ | |
1777 /* SUBROUTINE CALC_START_OF_DECO_ZONE */ | |
1778 /* Purpose: This subroutine uses the Bisection Method to find the depth at */ | |
1779 /* which the leading compartment just enters the decompression zone. */ | |
1780 /* Source: "Numerical Recipes in Fortran 77", Cambridge University Press, */ | |
1781 /* 1992. */ | |
1782 /* =============================================================================== */ | |
1783 | |
1784 int calc_start_of_deco_zone(float *starting_depth, | |
1785 float *rate, | |
1786 float *depth_start_of_deco_zone) | |
1787 { | |
1788 /* Local variables */ | |
1789 float last_diff_change, | |
1790 initial_helium_pressure, | |
1791 mid_range_nitrogen_pressure; | |
1792 short i, j; | |
1793 float initial_inspired_n2_pressure, | |
1794 cpt_depth_start_of_deco_zone, | |
1795 low_bound, | |
1796 initial_inspired_he_pressure, | |
1797 high_bound_nitrogen_pressure, | |
1798 nitrogen_rate, | |
1799 function_at_mid_range, | |
1800 function_at_low_bound, | |
1801 high_bound, | |
1802 mid_range_helium_pressure, | |
1803 mid_range_time, | |
1804 starting_ambient_pressure, | |
1805 initial_nitrogen_pressure, | |
1806 function_at_high_bound; | |
1807 | |
1808 float time_to_start_of_deco_zone, | |
1809 high_bound_helium_pressure, | |
1810 helium_rate, | |
1811 differential_change; | |
1812 float fraction_helium_begin; | |
1813 float fraction_helium_end; | |
1814 float fraction_nitrogen_begin; | |
1815 float fraction_nitrogen_end; | |
1816 float ending_ambient_pressure; | |
1817 float time_test; | |
1818 | |
1819 | |
1820 /* loop */ | |
1821 /* =============================================================================== */ | |
1822 /* CALCULATIONS */ | |
1823 /* First initialize some variables */ | |
1824 /* =============================================================================== */ | |
1825 | |
1826 *depth_start_of_deco_zone = 0.0f; | |
1827 starting_ambient_pressure = *starting_depth + barometric_pressure; | |
1828 | |
1829 //>>>>>>>>>>>>>>>>>>>> | |
1830 //Test depth to calculate helium_rate and nitrogen_rate | |
1831 ending_ambient_pressure = starting_ambient_pressure/2; | |
1832 | |
1833 time_test = (ending_ambient_pressure - starting_ambient_pressure) / *rate; | |
1834 decom_get_inert_gases(starting_ambient_pressure / 10, (&pDiveSettings->decogaslist[mix_number]), &fraction_nitrogen_begin, &fraction_helium_begin ); | |
1835 decom_get_inert_gases(ending_ambient_pressure / 10, (&pDiveSettings->decogaslist[mix_number]), &fraction_nitrogen_end, &fraction_helium_end ); | |
1836 initial_inspired_he_pressure = (starting_ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_helium_begin; | |
1837 initial_inspired_n2_pressure = (starting_ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_nitrogen_begin; | |
1838 helium_rate = ((ending_ambient_pressure - WATER_VAPOR_PRESSURE)* fraction_helium_end - initial_inspired_he_pressure)/time_test; | |
1839 nitrogen_rate = ((ending_ambient_pressure - WATER_VAPOR_PRESSURE)* fraction_nitrogen_end - initial_inspired_n2_pressure)/time_test; | |
1840 //>>>>>>>>>>>>>>>>>>>>> | |
1841 /*initial_inspired_he_pressure = | |
1842 (starting_ambient_pressure - water_vapor_pressure) * | |
1843 fraction_helium[mix_number - 1]; | |
1844 initial_inspired_n2_pressure = | |
1845 (starting_ambient_pressure - water_vapor_pressure) * | |
1846 fraction_nitrogen[mix_number - 1]; | |
1847 helium_rate = *rate * fraction_helium[mix_number - 1]; | |
1848 nitrogen_rate = *rate * fraction_nitrogen[mix_number - 1];*/ | |
1849 | |
1850 /* =============================================================================== */ | |
1851 /* ESTABLISH THE BOUNDS FOR THE ROOT SEARCH USING THE BISECTION METHOD */ | |
1852 /* AND CHECK TO MAKE SURE THAT THE ROOT WILL BE WITHIN BOUNDS. PROCESS */ | |
1853 /* EACH COMPARTMENT INDIVIDUALLY AND FIND THE MAXIMUM DEPTH ACROSS ALL */ | |
1854 /* COMPARTMENTS (LEADING COMPARTMENT) */ | |
1855 /* In this case, we are solving for time - the time when the gas tension in */ | |
1856 /* the compartment will be equal to ambient pressure. The low bound for time */ | |
1857 /* is set at zero and the high bound is set at the time it would take to */ | |
1858 /* ascend to zero ambient pressure (absolute). Since the ascent rate is */ | |
1859 /* negative, a multiplier of -1.0 is used to make the time positive. The */ | |
1860 /* desired point when gas tension equals ambient pressure is found at a time */ | |
1861 /* somewhere between these endpoints. The algorithm checks to make sure that */ | |
1862 /* the solution lies in between these bounds by first computing the low bound */ | |
1863 /* and high bound function values. */ | |
1864 /* =============================================================================== */ | |
1865 | |
1866 low_bound = 0.; | |
1867 high_bound = starting_ambient_pressure / *rate * -1.0f; | |
1868 for (i = 1; i <= 16; ++i) | |
1869 { | |
1870 initial_helium_pressure = helium_pressure[i - 1]; | |
1871 initial_nitrogen_pressure = nitrogen_pressure[i - 1]; | |
1872 function_at_low_bound = | |
1873 initial_helium_pressure + | |
1874 initial_nitrogen_pressure + | |
1875 CONSTANT_PRESSURE_OTHER_GASES - | |
1876 starting_ambient_pressure; | |
1877 high_bound_helium_pressure = | |
1878 schreiner_equation__2(&initial_inspired_he_pressure, | |
1879 &helium_rate, | |
1880 &high_bound, | |
1881 &HELIUM_TIME_CONSTANT[i - 1], | |
1882 &initial_helium_pressure); | |
1883 high_bound_nitrogen_pressure = | |
1884 schreiner_equation__2(&initial_inspired_n2_pressure, | |
1885 &nitrogen_rate, | |
1886 &high_bound, | |
1887 &NITROGEN_TIME_CONSTANT[i - 1], | |
1888 &initial_nitrogen_pressure); | |
1889 function_at_high_bound = high_bound_helium_pressure + | |
1890 high_bound_nitrogen_pressure + | |
1891 CONSTANT_PRESSURE_OTHER_GASES; | |
1892 if (function_at_high_bound * function_at_low_bound >= 0.0f) | |
1893 { | |
1894 printf("\nERROR! ROOT IS NOT WITHIN BRACKETS"); | |
1895 } | |
1896 | |
1897 /* =============================================================================== */ | |
1898 /* APPLY THE BISECTION METHOD IN SEVERAL ITERATIONS UNTIL A SOLUTION WITH */ | |
1899 /* THE DESIRED ACCURACY IS FOUND */ | |
1900 /* Note: the program allows for up to 100 iterations. Normally an exit will */ | |
1901 /* be made from the loop well before that number. If, for some reason, the */ | |
1902 /* program exceeds 100 iterations, there will be a pause to alert the user. */ | |
1903 /* =============================================================================== */ | |
1904 | |
1905 if (function_at_low_bound < 0.0f) | |
1906 { | |
1907 time_to_start_of_deco_zone = low_bound; | |
1908 differential_change = high_bound - low_bound; | |
1909 } else { | |
1910 time_to_start_of_deco_zone = high_bound; | |
1911 differential_change = low_bound - high_bound; | |
1912 } | |
1913 for (j = 1; j <= 100; ++j) | |
1914 { | |
1915 last_diff_change = differential_change; | |
1916 differential_change = last_diff_change * 0.5f; | |
1917 mid_range_time = | |
1918 time_to_start_of_deco_zone + | |
1919 differential_change; | |
1920 mid_range_helium_pressure = | |
1921 schreiner_equation__2(&initial_inspired_he_pressure, | |
1922 &helium_rate, | |
1923 &mid_range_time, | |
1924 &HELIUM_TIME_CONSTANT[i - 1], | |
1925 &initial_helium_pressure); | |
1926 mid_range_nitrogen_pressure = | |
1927 schreiner_equation__2(&initial_inspired_n2_pressure, | |
1928 &nitrogen_rate, | |
1929 &mid_range_time, | |
1930 &NITROGEN_TIME_CONSTANT[i - 1], | |
1931 &initial_nitrogen_pressure); | |
1932 function_at_mid_range = | |
1933 mid_range_helium_pressure + | |
1934 mid_range_nitrogen_pressure + | |
1935 CONSTANT_PRESSURE_OTHER_GASES - | |
1936 (starting_ambient_pressure + *rate * mid_range_time); | |
1937 if (function_at_mid_range <= 0.0f) { | |
1938 time_to_start_of_deco_zone = mid_range_time; | |
1939 } | |
1940 if( fabs(differential_change) < 0.001f | |
1941 || function_at_mid_range == 0.0f) | |
1942 { | |
1943 goto L170; | |
1944 } | |
1945 /* L150: */ | |
1946 } | |
1947 printf("\nERROR! ROOT SEARCH EXCEEDED MAXIMUM ITERATIONS"); | |
1948 //pause(); | |
1949 | |
1950 /* =============================================================================== */ | |
1951 /* When a solution with the desired accuracy is found, the program jumps out */ | |
1952 /* of the loop to Line 170 and assigns the solution value for the individual */ | |
1953 /* compartment. */ | |
1954 /* =============================================================================== */ | |
1955 | |
1956 L170: | |
1957 cpt_depth_start_of_deco_zone = | |
1958 starting_ambient_pressure + | |
1959 *rate * time_to_start_of_deco_zone - | |
1960 barometric_pressure; | |
1961 | |
1962 /* =============================================================================== */ | |
1963 /* The overall solution will be the compartment with the maximum depth where */ | |
1964 /* gas tension equals ambient pressure (leading compartment). */ | |
1965 /* =============================================================================== */ | |
1966 | |
1967 *depth_start_of_deco_zone = | |
1968 fmaxf(*depth_start_of_deco_zone, cpt_depth_start_of_deco_zone); | |
1969 /* L200: */ | |
1970 } | |
1971 return 0; | |
1972 } /* calc_start_of_deco_zone */ | |
1973 | |
1974 /* =============================================================================== */ | |
1975 /* SUBROUTINE PROJECTED_ASCENT */ | |
1976 /* Purpose: This subprogram performs a simulated ascent outside of the main */ | |
1977 /* program to ensure that a deco ceiling will not be violated due to unusual */ | |
1978 /* gas loading during ascent (on-gassing). If the deco ceiling is violated, */ | |
1979 /* the stop depth will be adjusted deeper by the step size until a safe */ | |
1980 /* ascent can be made. */ | |
1981 /* =============================================================================== */ | |
1982 | |
1983 int projected_ascent(float *starting_depth, | |
1984 float *rate, | |
1985 float *deco_stop_depth, | |
1986 float *step_size) | |
1987 { | |
1988 /* Local variables */ | |
1989 float weighted_allowable_gradient, | |
1990 ending_ambient_pressure, | |
1991 temp_gas_loading[16]; | |
1992 int i; | |
1993 float allowable_gas_loading[16]; | |
1994 float temp_nitrogen_pressure[16]; | |
1995 float temp_helium_pressure[16]; | |
1996 float run_time_save = 0; | |
1997 | |
1998 /* loop */ | |
1999 /* =============================================================================== */ | |
2000 /* CALCULATIONS */ | |
2001 /* =============================================================================== */ | |
2002 | |
2003 | |
2004 L665: | |
2005 ending_ambient_pressure = *deco_stop_depth + barometric_pressure; | |
2006 for (i = 1; i <= 16; ++i) { | |
2007 temp_helium_pressure[i - 1] = helium_pressure[i - 1]; | |
2008 temp_nitrogen_pressure[i - 1] = nitrogen_pressure[i - 1]; | |
2009 } | |
2010 run_time_save = run_time; | |
2011 gas_loadings_ascent_descen(temp_helium_pressure, temp_nitrogen_pressure, *starting_depth,*deco_stop_depth,*rate,true); | |
2012 run_time = run_time_save; | |
2013 | |
2014 for (i = 1; i <= 16; ++i) | |
2015 { | |
2016 temp_gas_loading[i - 1] = | |
2017 temp_helium_pressure[i - 1] + | |
2018 temp_nitrogen_pressure[i - 1]; | |
2019 if (temp_gas_loading[i - 1] > 0.0f) | |
2020 { | |
2021 weighted_allowable_gradient = | |
2022 (allowable_gradient_he[i - 1] * | |
2023 temp_helium_pressure[i - 1] + | |
2024 allowable_gradient_n2[i - 1] * | |
2025 temp_nitrogen_pressure[i - 1]) / temp_gas_loading[i - 1]; | |
2026 } else { | |
2027 /* Computing MIN */ | |
2028 weighted_allowable_gradient = fminf(allowable_gradient_he[i - 1],allowable_gradient_n2[i - 1]); | |
2029 } | |
2030 allowable_gas_loading[i - 1] = | |
2031 ending_ambient_pressure + | |
2032 weighted_allowable_gradient - | |
2033 CONSTANT_PRESSURE_OTHER_GASES; | |
2034 /* L670: */ | |
2035 } | |
2036 for (i = 1; i <= 16; ++i) { | |
2037 if (temp_gas_loading[i - 1] > allowable_gas_loading[i - 1]) { | |
2038 *deco_stop_depth += *step_size; | |
2039 goto L665; | |
2040 } | |
2041 /* L671: */ | |
2042 } | |
2043 return 0; | |
2044 } /* projected_ascent */ | |
2045 | |
2046 /* =============================================================================== */ | |
2047 /* SUBROUTINE DECOMPRESSION_STOP */ | |
2048 /* Purpose: This subprogram calculates the required time at each */ | |
2049 /* decompression stop. */ | |
2050 /* =============================================================================== */ | |
2051 | |
2052 void decompression_stop(float *deco_stop_depth, | |
2053 float *step_size, | |
2054 _Bool final_deco_calculation) | |
2055 { | |
2056 /* Local variables */ | |
2057 float inspired_nitrogen_pressure; | |
2058 // short last_segment_number; | |
2059 // float weighted_allowable_gradient; | |
2060 float initial_helium_pressure[16]; | |
2061 /* by hw */ | |
51
8f8ea3a32e82
Resolved warnings pointing to possible invalid memory access
Ideenmodellierer
parents:
38
diff
changeset
|
2062 float initial_CNS = gCNS_VPM; |
38 | 2063 |
2064 //static float time_counter; | |
2065 short i; | |
2066 float ambient_pressure; | |
2067 float inspired_helium_pressure, | |
2068 next_stop; | |
2069 //last_run_time, | |
2070 //temp_segment_time; | |
2071 | |
2072 float deco_ceiling_depth, | |
2073 initial_nitrogen_pressure[16]; | |
2074 //round_up_operation; | |
2075 float fraction_helium_begin; | |
2076 float fraction_nitrogen_begin; | |
2077 int count = 0; | |
2078 _Bool buehlmann_wait = false; | |
2079 float tissue_He_saturation[16]; | |
2080 float tissue_N2_saturation[16]; | |
2081 float vpm_buehlmann_safety_gradient = 1.0f - (((float)pDiveSettings->vpm_conservatism) / 40); | |
2082 /* loop */ | |
2083 /* =============================================================================== */ | |
2084 /* CALCULATIONS */ | |
2085 /* =============================================================================== */ | |
2086 | |
2087 segment_time = 0; | |
2088 // temp_segment_time = segment_time; | |
2089 ambient_pressure = *deco_stop_depth + barometric_pressure; | |
2090 //ending_ambient_pressure = ambient_pressure; | |
2091 decom_get_inert_gases(ambient_pressure / 10, (&pDiveSettings->decogaslist[mix_number]), &fraction_nitrogen_begin, &fraction_helium_begin ); | |
2092 | |
2093 if(*deco_stop_depth == (float)(pDiveSettings->last_stop_depth_bar * 10)) | |
2094 next_stop = 0; | |
2095 else | |
2096 { | |
2097 next_stop = *deco_stop_depth - *step_size; | |
2098 next_stop = fmaxf(next_stop,(float)pDiveSettings->last_stop_depth_bar * 10); | |
2099 } | |
2100 | |
2101 inspired_helium_pressure = | |
2102 (ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_helium_begin; | |
2103 inspired_nitrogen_pressure = | |
2104 (ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_nitrogen_begin; | |
2105 | |
2106 /* =============================================================================== */ | |
2107 /* Check to make sure that program won't lock up if unable to decompress */ | |
2108 /* to the next stop. If so, write error message and terminate program. */ | |
2109 /* =============================================================================== */ | |
2110 | |
2111 //deco_ceiling_depth = next_stop +1; //deco_ceiling_depth = next_stop + 1; | |
2112 if(!vpm_violates_buehlmann) | |
2113 calc_deco_ceiling(&deco_ceiling_depth, false); //weg, weil auf jeden Fall schleife für safety und so konservativer | |
2114 else | |
2115 deco_ceiling_depth = next_stop + 1; | |
2116 | |
2117 if(deco_ceiling_depth > next_stop) | |
2118 { | |
2119 while (deco_ceiling_depth > next_stop) | |
2120 { | |
2121 | |
2122 segment_time += 60; | |
2123 if(segment_time >= 999 ) | |
2124 { | |
2125 segment_time = 999 ; | |
2126 run_time += segment_time; | |
2127 return; | |
2128 } | |
2129 //goto L700; | |
2130 initial_CNS = gCNS_VPM; | |
2131 decom_oxygen_calculate_cns_exposure(60*60,&pDiveSettings->decogaslist[mix_number],ambient_pressure/10,&gCNS_VPM); | |
2132 for (i = 0; i < 16; i++) | |
2133 { | |
2134 initial_helium_pressure[i] = helium_pressure[i]; | |
2135 initial_nitrogen_pressure[i] = nitrogen_pressure[i]; | |
2136 helium_pressure[i] += (inspired_helium_pressure - helium_pressure[i]) * float_buehlmann_He_factor_expositon_one_hour[i]; | |
2137 nitrogen_pressure[i] += (inspired_nitrogen_pressure - nitrogen_pressure[i]) * float_buehlmann_N2_factor_expositon_one_hour[i]; | |
2138 } | |
2139 calc_deco_ceiling(&deco_ceiling_depth, false); | |
2140 } | |
2141 if(deco_ceiling_depth < next_stop) | |
2142 { | |
2143 segment_time -= 60; | |
2144 gCNS_VPM = initial_CNS; | |
2145 for (i = 0; i < 16; i++) | |
2146 { | |
2147 helium_pressure[i] = initial_helium_pressure[i]; | |
2148 nitrogen_pressure[i] = initial_nitrogen_pressure[i]; | |
2149 } | |
2150 deco_ceiling_depth = next_stop +1; | |
2151 } | |
2152 count = 0; | |
2153 while (deco_ceiling_depth > next_stop && count < 13) | |
2154 { | |
2155 count++; | |
2156 segment_time += 5; | |
2157 //goto L700; | |
2158 initial_CNS = gCNS_VPM; | |
2159 decom_oxygen_calculate_cns_exposure(60*5,&pDiveSettings->decogaslist[mix_number],ambient_pressure/10,&gCNS_VPM); | |
2160 for (i = 0; i < 16; i++) | |
2161 { | |
2162 initial_helium_pressure[i] = helium_pressure[i]; | |
2163 initial_nitrogen_pressure[i] = nitrogen_pressure[i]; | |
2164 helium_pressure[i] += (inspired_helium_pressure - helium_pressure[i]) * float_buehlmann_He_factor_expositon_five_minutes[i]; | |
2165 nitrogen_pressure[i] += (inspired_nitrogen_pressure - nitrogen_pressure[i]) * float_buehlmann_N2_factor_expositon_five_minutes[i]; | |
2166 } | |
2167 calc_deco_ceiling(&deco_ceiling_depth, false); | |
2168 } | |
2169 if(deco_ceiling_depth < next_stop) | |
2170 { | |
2171 segment_time -= 5; | |
2172 gCNS_VPM = initial_CNS; | |
2173 for (i = 0; i < 16; i++) { | |
2174 helium_pressure[i] = initial_helium_pressure[i]; | |
2175 nitrogen_pressure[i] = initial_nitrogen_pressure[i]; | |
2176 } | |
2177 deco_ceiling_depth = next_stop +1; | |
2178 } | |
2179 buehlmann_wait = false; | |
2180 while (buehlmann_wait || (deco_ceiling_depth > next_stop)) | |
2181 { | |
2182 //time_counter = temp_segment_time; | |
2183 segment_time += 1; | |
2184 | |
2185 if(segment_time >= 999 ) | |
2186 { | |
2187 segment_time = 999 ; | |
2188 run_time += segment_time; | |
2189 return; | |
2190 } | |
2191 //goto L700; | |
2192 initial_CNS = gCNS_VPM; | |
2193 decom_oxygen_calculate_cns_exposure(60*1,&pDiveSettings->decogaslist[mix_number],ambient_pressure/10,&gCNS_VPM); | |
2194 for (i = 0; i < 16; i++) | |
2195 { | |
2196 initial_helium_pressure[i] = helium_pressure[i]; | |
2197 initial_nitrogen_pressure[i] = nitrogen_pressure[i]; | |
2198 helium_pressure[i] += (inspired_helium_pressure - helium_pressure[i]) * float_buehlmann_He_factor_expositon_one_minute[i]; | |
2199 nitrogen_pressure[i] += (inspired_nitrogen_pressure - nitrogen_pressure[i]) * float_buehlmann_N2_factor_expositon_one_minute[i]; | |
2200 } | |
2201 if(!buehlmann_wait) | |
2202 calc_deco_ceiling(&deco_ceiling_depth, false); | |
2203 | |
2204 if(buehlmannSafety && final_deco_calculation && !(deco_ceiling_depth > next_stop)) | |
2205 { | |
2206 for (i = 0; i < 16; i++) | |
2207 { | |
2208 tissue_He_saturation[i] = helium_pressure[i] / 10; | |
2209 tissue_N2_saturation[i] = nitrogen_pressure[i] / 10; | |
2210 } | |
2211 if( (fabsf(nitrogen_pressure[15] - inspired_nitrogen_pressure) < 0.00001f) && (fabsf(helium_pressure[15] - inspired_helium_pressure) < 0.00001f) | |
2212 && (fabsf(nitrogen_pressure[0] - inspired_nitrogen_pressure) < 0.00001f) && (fabsf(helium_pressure[0] - inspired_helium_pressure) < 0.00001f)) | |
2213 { | |
2214 buehlmann_wait_exceeded = true; | |
2215 break; | |
2216 } | |
2217 | |
2218 if(decom_tissue_test_tolerance(tissue_N2_saturation, tissue_He_saturation, vpm_buehlmann_safety_gradient, (next_stop / 10.0f) + pInput->pressure_surface_bar)) | |
2219 break; | |
2220 | |
2221 buehlmann_wait = true; | |
2222 } | |
2223 } | |
2224 if(buehlmann_wait) | |
2225 vpm_violates_buehlmann = true; | |
2226 | |
2227 if(!buehlmann_wait) | |
2228 { | |
2229 if(deco_ceiling_depth < next_stop) | |
2230 { | |
2231 segment_time -= 1; | |
2232 gCNS_VPM = initial_CNS; | |
2233 for (i = 0; i < 16; i++) { | |
2234 helium_pressure[i] = initial_helium_pressure[i]; | |
2235 nitrogen_pressure[i] = initial_nitrogen_pressure[i]; | |
2236 } | |
2237 deco_ceiling_depth = next_stop +1; | |
2238 } | |
2239 while (deco_ceiling_depth > next_stop) | |
2240 { | |
2241 //time_counter = temp_segment_time; | |
2242 segment_time += (float) 1.0f / 3.0f; | |
2243 //goto L700; | |
2244 initial_CNS = gCNS_VPM; | |
2245 decom_oxygen_calculate_cns_exposure(20,&pDiveSettings->decogaslist[mix_number],ambient_pressure/10,&gCNS_VPM); | |
2246 for (i = 0; i < 16; i++) | |
2247 { | |
2248 helium_pressure[i] += (inspired_helium_pressure - helium_pressure[i]) * float_buehlmann_He_factor_expositon_20_seconds[i]; | |
2249 nitrogen_pressure[i] += (inspired_nitrogen_pressure - nitrogen_pressure[i]) * float_buehlmann_N2_factor_expositon_20_seconds[i]; | |
2250 } | |
2251 calc_deco_ceiling(&deco_ceiling_depth, false); | |
2252 } | |
2253 } | |
2254 } | |
2255 | |
2256 /*float pressure_save =dive_data.pressure; | |
2257 dive_data.pressure = ambient_pressure/10; | |
2258 tissues_exposure_stage(st_deco_test,(int)(segment_time * 60), &dive_data, &gaslist); | |
2259 dive_data.pressure = pressure_save;*/ | |
2260 run_time += segment_time; | |
2261 return; | |
2262 } /* decompression_stop */ | |
2263 | |
2264 /* =============================================================================== */ | |
2265 // SUROUTINE BOYLES_LAW_COMPENSATION | |
2266 // Purpose: This subprogram calculates the reduction in allowable gradients | |
2267 // with decreasing ambient pressure during the decompression profile based | |
2268 // on Boyle's Law considerations. | |
2269 //=============================================================================== | |
2270 void BOYLES_LAW_COMPENSATION (float* First_Stop_Depth, | |
2271 float* Deco_Stop_Depth, | |
2272 float* Step_Size) | |
2273 { | |
2274 short i; | |
2275 | |
2276 float Next_Stop; | |
2277 float Ambient_Pressure_First_Stop, Ambient_Pressure_Next_Stop; | |
2278 float Amb_Press_First_Stop_Pascals, Amb_Press_Next_Stop_Pascals; | |
2279 float A, B, C, Low_Bound, High_Bound, Ending_Radius; | |
2280 float Deco_Gradient_Pascals; | |
2281 float Allow_Grad_First_Stop_He_Pa, Radius_First_Stop_He; | |
2282 float Allow_Grad_First_Stop_N2_Pa, Radius_First_Stop_N2; | |
2283 | |
2284 //=============================================================================== | |
2285 // LO//AL ARRAYS | |
2286 //=============================================================================== | |
2287 // float Radius1_He[16], Radius2_He[16]; | |
2288 // float Radius1_N2[16], Radius2_N2[16]; | |
2289 float root_factor; | |
2290 | |
2291 //=============================================================================== | |
2292 // CALCULATIONS | |
2293 //=============================================================================== | |
2294 Next_Stop = *Deco_Stop_Depth - *Step_Size; | |
2295 | |
2296 Ambient_Pressure_First_Stop = *First_Stop_Depth + | |
2297 barometric_pressure; | |
2298 | |
2299 Ambient_Pressure_Next_Stop = Next_Stop + barometric_pressure; | |
2300 | |
2301 Amb_Press_First_Stop_Pascals = (Ambient_Pressure_First_Stop/UNITS_FACTOR) * 101325.0f; | |
2302 | |
2303 Amb_Press_Next_Stop_Pascals = | |
2304 (Ambient_Pressure_Next_Stop/UNITS_FACTOR) * 101325.0f; | |
2305 root_factor = powf(Amb_Press_First_Stop_Pascals/Amb_Press_Next_Stop_Pascals,1.0f / 3.0f); | |
2306 | |
2307 for( i = 0; i < 16;i++) | |
2308 { | |
2309 Allow_Grad_First_Stop_He_Pa = | |
2310 (allowable_gradient_he[i]/UNITS_FACTOR) * 101325.0f; | |
2311 | |
2312 Radius_First_Stop_He = (2.0f * SURFACE_TENSION_GAMMA) / | |
2313 Allow_Grad_First_Stop_He_Pa; | |
2314 | |
2315 // Radius1_He[i] = Radius_First_Stop_He; | |
2316 A = Amb_Press_Next_Stop_Pascals; | |
2317 B = -2.0f * SURFACE_TENSION_GAMMA; | |
2318 C = (Amb_Press_First_Stop_Pascals + (2.0f * SURFACE_TENSION_GAMMA)/ | |
2319 Radius_First_Stop_He)* Radius_First_Stop_He* | |
2320 (Radius_First_Stop_He*(Radius_First_Stop_He)); | |
2321 Low_Bound = Radius_First_Stop_He; | |
2322 High_Bound = Radius_First_Stop_He * root_factor; | |
2323 //*pow(Amb_Press_First_Stop_Pascals/Amb_Press_Next_Stop_Pascals,1.0/3.0); | |
2324 //*(Amb_Press_First_Stop_Pascals/Amb_Press_Next_Stop_Pascals)**(1.0/3.0); | |
2325 | |
2326 radius_root_finder(&A,&B,&C, &Low_Bound, &High_Bound, | |
2327 &Ending_Radius); | |
2328 | |
2329 // Radius2_He[i] = Ending_Radius; | |
2330 Deco_Gradient_Pascals = (2.0f * SURFACE_TENSION_GAMMA) / | |
2331 Ending_Radius; | |
2332 | |
2333 deco_gradient_he[i] = (Deco_Gradient_Pascals / 101325.0f)* | |
2334 UNITS_FACTOR; | |
2335 | |
2336 } | |
2337 | |
2338 for( i = 0; i < 16;i++) | |
2339 { | |
2340 Allow_Grad_First_Stop_N2_Pa = | |
2341 (allowable_gradient_n2[i]/UNITS_FACTOR) * 101325.0f; | |
2342 | |
2343 Radius_First_Stop_N2 = (2.0f * SURFACE_TENSION_GAMMA) / | |
2344 Allow_Grad_First_Stop_N2_Pa; | |
2345 | |
2346 // Radius1_N2[i] = Radius_First_Stop_N2; | |
2347 A = Amb_Press_Next_Stop_Pascals; | |
2348 B = -2.0f * SURFACE_TENSION_GAMMA; | |
2349 C = (Amb_Press_First_Stop_Pascals + (2.0f * SURFACE_TENSION_GAMMA)/ | |
2350 Radius_First_Stop_N2)* Radius_First_Stop_N2* | |
2351 (Radius_First_Stop_N2*(Radius_First_Stop_N2)); | |
2352 Low_Bound = Radius_First_Stop_N2; | |
2353 High_Bound = Radius_First_Stop_N2* root_factor;//pow(Amb_Press_First_Stop_Pascals/Amb_Press_Next_Stop_Pascals,1.0/3.0); | |
2354 | |
2355 //High_Bound = Radius_First_Stop_N2*exp(log(Amb_Press_First_Stop_Pascals/Amb_Press_Next_Stop_Pascals)/3); | |
2356 radius_root_finder(&A,&B,&C, &Low_Bound, &High_Bound, | |
2357 &Ending_Radius); | |
2358 | |
2359 // Radius2_N2[i] = Ending_Radius; | |
2360 Deco_Gradient_Pascals = (2.0f * SURFACE_TENSION_GAMMA) / | |
2361 Ending_Radius; | |
2362 | |
2363 deco_gradient_n2[i] = (Deco_Gradient_Pascals / 101325.0f)* | |
2364 UNITS_FACTOR; | |
2365 } | |
2366 } | |
2367 | |
2368 /* =============================================================================== */ | |
2369 // vpm_calc_nullzeit | |
2370 // Purpose: This function calcs zero time (time where no decostops are needed) | |
2371 //=============================================================================== | |
2372 int vpm_calc_nullzeit(void) | |
2373 { | |
2374 static float future_helium_pressure[16]; | |
2375 static float future_nitrogen_pressure[16]; | |
2376 static int temp_segment_time; | |
2377 static int mix_number; | |
2378 static float inspired_helium_pressure; | |
2379 static float inspired_nitrogen_pressure; | |
2380 | |
2381 float previous_helium_pressure[16]; | |
2382 float previous_nitrogen_pressure[16]; | |
2383 float ambient_pressure; | |
2384 float fraction_helium_begin; | |
2385 float fraction_nitrogen_begin; | |
2386 int i = 0; | |
2387 int count = 0; | |
2388 int status = CALC_END; | |
2389 //if(begin) | |
2390 //{ | |
2391 for(i = 0; i < 16;i++) | |
2392 { | |
2393 future_helium_pressure[i] = pInput->tissue_helium_bar[i] * 10;//tissue_He_saturation[st_dive][i] * 10; | |
2394 future_nitrogen_pressure[i] = pInput->tissue_nitrogen_bar[i] * 10; | |
2395 } | |
2396 temp_segment_time = 0; | |
2397 | |
2398 mix_number = 0; | |
2399 ambient_pressure = pInput->pressure_ambient_bar * 10; | |
2400 // fraction_helium_begin; | |
2401 // fraction_nitrogen_begin; | |
2402 decom_get_inert_gases( ambient_pressure / 10, (&pDiveSettings->decogaslist[mix_number]) , &fraction_nitrogen_begin, &fraction_helium_begin ); | |
2403 inspired_helium_pressure =(ambient_pressure - WATER_VAPOR_PRESSURE) * fraction_helium_begin; | |
2404 inspired_nitrogen_pressure =(ambient_pressure - WATER_VAPOR_PRESSURE) *fraction_nitrogen_begin; | |
2405 | |
2406 //if(!nullzeit_unter60) | |
2407 //{ | |
2408 status = CALC_END; | |
2409 while (status == CALC_END) | |
2410 { | |
2411 count++; | |
2412 //if(count == 7) | |
2413 //return CALC_NULLZEIT2; | |
2414 temp_segment_time += 60; | |
2415 if(temp_segment_time >= 300) | |
2416 { | |
2417 pDecoInfo->output_ndl_seconds = temp_segment_time * 60; | |
2418 return CALC_NULLZEIT; | |
2419 } | |
2420 run_time += 60; | |
2421 //goto L700; | |
2422 for (i = 1; i <= 16; ++i) { | |
2423 previous_helium_pressure[i-1] = future_helium_pressure[i - 1]; | |
2424 previous_nitrogen_pressure[i - 1] = future_nitrogen_pressure[i - 1]; | |
2425 future_helium_pressure[i - 1] = future_helium_pressure[i - 1] + (inspired_helium_pressure - future_helium_pressure[i - 1]) * float_buehlmann_He_factor_expositon_one_hour[i-1]; | |
2426 future_nitrogen_pressure[i - 1] = future_nitrogen_pressure[i - 1] + (inspired_nitrogen_pressure - future_nitrogen_pressure[i - 1]) * float_buehlmann_N2_factor_expositon_one_hour[i-1]; | |
2427 helium_pressure[i - 1] = future_helium_pressure[i - 1]; | |
2428 nitrogen_pressure[i - 1] = future_nitrogen_pressure[i - 1]; | |
2429 } | |
2430 vpm_calc_deco(); | |
2431 while((status = vpm_calc_critcal_volume(true,true)) == CALC_CRITICAL); | |
2432 | |
2433 } | |
2434 | |
2435 temp_segment_time -= 60; | |
2436 run_time -= 60; | |
2437 for (i = 1; i <= 16; ++i) | |
2438 { | |
2439 future_helium_pressure[i - 1] = previous_helium_pressure[i-1]; | |
2440 future_nitrogen_pressure[i - 1] = previous_nitrogen_pressure[i - 1]; | |
2441 } | |
2442 //} | |
2443 //} | |
2444 //if(!nullzeit_unter60 || begin || temp_segment_time > 10) | |
2445 //{ | |
2446 | |
2447 status = CALC_END; | |
2448 if(temp_segment_time < 60) | |
2449 nullzeit_unter60 = true; | |
2450 | |
2451 while (status == CALC_END) | |
2452 { | |
2453 // count++; | |
2454 //if(count >= 5) | |
2455 //return CALC_NULLZEIT2; | |
2456 temp_segment_time += 5; | |
2457 if(temp_segment_time >= 300) | |
2458 { | |
2459 pDecoInfo->output_ndl_seconds = temp_segment_time * 60; | |
2460 return CALC_NULLZEIT; | |
2461 } | |
2462 if(nullzeit_unter60 && temp_segment_time > 60) | |
2463 { | |
2464 nullzeit_unter60 = false; | |
2465 //tts[NULLZEIT] = temp_segment_time * 60; | |
2466 return CALC_NULLZEIT; | |
2467 } | |
2468 run_time += 5; | |
2469 //goto L700; | |
2470 for (i = 1; i <= 16; ++i) { | |
2471 previous_helium_pressure[i-1] = future_helium_pressure[i - 1]; | |
2472 previous_nitrogen_pressure[i - 1] = future_nitrogen_pressure[i - 1]; | |
2473 future_helium_pressure[i - 1] = future_helium_pressure[i - 1] + (inspired_helium_pressure - future_helium_pressure[i - 1]) * float_buehlmann_He_factor_expositon_five_minutes[i-1]; | |
2474 future_nitrogen_pressure[i - 1] = future_nitrogen_pressure[i - 1] + (inspired_nitrogen_pressure - future_nitrogen_pressure[i - 1]) * float_buehlmann_N2_factor_expositon_five_minutes[i-1]; | |
2475 helium_pressure[i - 1] = future_helium_pressure[i - 1]; | |
2476 nitrogen_pressure[i - 1] = future_nitrogen_pressure[i - 1]; | |
2477 } | |
2478 vpm_calc_deco(); | |
2479 while((status =vpm_calc_critcal_volume(true,true)) == CALC_CRITICAL); | |
2480 } | |
2481 temp_segment_time -= 5; | |
2482 run_time -= 5; | |
2483 for (i = 1; i <= 16; ++i) { | |
2484 future_helium_pressure[i - 1] = previous_helium_pressure[i-1]; | |
2485 future_nitrogen_pressure[i - 1] = previous_nitrogen_pressure[i - 1]; | |
2486 } | |
2487 status = CALC_END; | |
2488 //if(temp_segment_time < 5) | |
2489 //count = 2; | |
2490 //} | |
2491 //else | |
2492 //count = 1; | |
2493 if(temp_segment_time <= 20) | |
2494 { | |
2495 while (status == CALC_END) | |
2496 { | |
2497 //time_counter = temp_segment_time; | |
2498 //count++; | |
2499 //if(count > 2) | |
2500 //return CALC_NULLZEIT2; | |
2501 temp_segment_time += minimum_deco_stop_time; | |
2502 run_time += minimum_deco_stop_time; | |
2503 //goto L700; | |
2504 for (i = 1; i <= 16; ++i) { | |
2505 future_helium_pressure[i - 1] = future_helium_pressure[i - 1] + (inspired_helium_pressure - future_helium_pressure[i - 1]) * float_buehlmann_He_factor_expositon_one_minute[i-1]; | |
2506 future_nitrogen_pressure[i - 1] = future_nitrogen_pressure[i - 1] + (inspired_nitrogen_pressure - future_nitrogen_pressure[i - 1]) * float_buehlmann_N2_factor_expositon_one_minute[i-1]; | |
2507 helium_pressure[i - 1] = future_helium_pressure[i - 1]; | |
2508 nitrogen_pressure[i - 1] =future_nitrogen_pressure[i - 1]; | |
2509 | |
2510 } | |
2511 vpm_calc_deco(); | |
2512 while((status =vpm_calc_critcal_volume(true,true)) == CALC_CRITICAL); | |
2513 | |
2514 } | |
2515 } | |
2516 else | |
2517 temp_segment_time += 5; | |
2518 pDecoInfo->output_ndl_seconds = temp_segment_time * 60; | |
2519 if(temp_segment_time > 1) | |
2520 return CALC_NULLZEIT; | |
2521 else | |
2522 return CALC_BEGIN; | |
2523 } |