diff options
| -rw-r--r-- | deco.c | 12 |
1 files changed, 12 insertions, 0 deletions
@@ -81,6 +81,8 @@ const double buehlmann_He_factor_expositon_one_second[] = { #define N2_IN_AIR 0.7902 #define DECO_STOPS_MULTIPLIER_MM 3000.0 +#define GF_LOW_AT_MAXDEPTH 0 + double tissue_n2_sat[16]; double tissue_he_sat[16]; double tissue_tolerated_ambient_pressure[16]; @@ -96,6 +98,7 @@ static double tissue_tolerance_calc(const struct dive *dive) double gf_high = buehlmann_config.gf_high; double gf_low = buehlmann_config.gf_low; double surface = dive->surface_pressure.mbar / 1000.0; + double lowest_ceiling; for (ci = 0; ci < 16; ci++) { @@ -105,6 +108,13 @@ static double tissue_tolerance_calc(const struct dive *dive) /* tissue_tolerated_ambient_pressure[ci] = (tissue_inertgas_saturation - buehlmann_inertgas_a) * buehlmann_inertgas_b; */ +#if !GF_LOW_AT_MAXDEPTH + lowest_ceiling = (buehlmann_inertgas_b * tissue_inertgas_saturation - gf_low * buehlmann_inertgas_a * buehlmann_inertgas_b) / + ((1.0 - buehlmann_inertgas_b) * gf_low + buehlmann_inertgas_b); + if(lowest_ceiling > gf_low_pressure_this_dive) + gf_low_pressure_this_dive = lowest_ceiling; +#endif + tissue_tolerated_ambient_pressure[ci] = (-buehlmann_inertgas_a * buehlmann_inertgas_b * (gf_high * gf_low_pressure_this_dive - gf_low * surface) - (1.0 - buehlmann_inertgas_b) * (gf_high - gf_low) * gf_low_pressure_this_dive * surface + buehlmann_inertgas_b * (gf_low_pressure_this_dive - surface) * tissue_inertgas_saturation) / @@ -129,8 +139,10 @@ double add_segment(double pressure, struct gasmix *gasmix, int period_in_seconds double ppn2 = (pressure - WV_PRESSURE) * (1000 - fo2 - gasmix->he.permille) / 1000.0; double pphe = (pressure - WV_PRESSURE) * gasmix->he.permille / 1000.0; +#if GF_LOW_AT_MAXDEPTH if (pressure > gf_low_pressure_this_dive) gf_low_pressure_this_dive = pressure; +#endif if (ccpo2 > 0.0) { /* CC */ double rel_o2_amb, f_dilutent; |