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Don't let the oxygen partial pressure drop below 0.

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No oxygen at all is not quite enough for the average diver but this prevents
inifintie loops/extremely long deco when subsurface is used in pscr mode
with unrealistic values for pscr preferences.

Signed-off-by: Robert C. Helling <helling@atdotde.de>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Robert C. Helling 2015-01-28 11:35:15 +01:00 • committed by Dirk Hohndel
parent 991531d847
commit 52b92ee03b
1 changed files with 2 additions and 0 deletions
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dive.c
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@ -1683,6 +1683,8 @@ extern void fill_pressures(struct gas_pressures *pressures, const double amb_pre
} else {
if (divemode == PSCR) { /* The steady state approximation should be good enough */
pressures->o2 = get_o2(mix) / 1000.0 * amb_pressure - (1.0 - get_o2(mix) / 1000.0) * prefs.o2consumption / (prefs.bottomsac * prefs.pscr_ratio / 1000.0);
if (pressures->o2 < 0) // He's dead, Jim.
pressures->o2 = 0;
if (get_o2(mix) != 1000) {
pressures->he = (amb_pressure - pressures->o2) * get_he(mix) / (1000.0 - get_o2(mix));
pressures->n2 = (amb_pressure - pressures->o2) * (1000 - get_o2(mix) - get_he(mix)) / (1000.0 - get_o2(mix));