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Get O2 right in bailout mode

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When doing OC bailout from a CCR dive, there could still
be pO2 sensor readings but those are not valid.

This fixes a problem noticed by Justin Ashworth.

Signed-off-by: Robert C. Helling <helling@atdotde.de>
This commit is contained in:
Robert C. Helling 2021-02-23 22:05:00 +01:00 • committed by Dirk Hohndel
parent fb11f8efa6
commit fdcfcb1b32
1 changed files with 5 additions and 5 deletions
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10
core/divelist.c
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@ -104,7 +104,7 @@ static int calculate_otu(const struct dive *dive)
struct sample *sample = dc->sample + i;
struct sample *psample = sample - 1;
t = sample->time.seconds - psample->time.seconds;
if (sample->o2sensor[0].mbar) { // if dive computer has o2 sensor(s) (CCR & PSCR) ..
if ((dc->divemode == CCR || dc->divemode == PSCR) && sample->o2sensor[0].mbar) { // if dive computer has o2 sensor(s) (CCR & PSCR) ..
po2i = psample->o2sensor[0].mbar;
po2f = sample->o2sensor[0].mbar; // ... use data from the first o2 sensor
} else {
@ -160,7 +160,7 @@ static double calculate_cns_dive(const struct dive *dive)
struct sample *sample = dc->sample + n;
struct sample *psample = sample - 1;
t = sample->time.seconds - psample->time.seconds;
if (sample->o2sensor[0].mbar) { // if dive computer has o2 sensor(s) (CCR & PSCR)
if ((dc->divemode == CCR || dc->divemode == PSCR) && sample->o2sensor[0].mbar) { // if dive computer has o2 sensor(s) (CCR & PSCR)
po2i = psample->o2sensor[0].mbar;
po2f = sample->o2sensor[0].mbar; // then use data from the first o2 sensor
trueo2 = true;
@ -177,13 +177,13 @@ static double calculate_cns_dive(const struct dive *dive)
po2i = lrint(o2 * depth_to_bar(psample->depth.mm, dive)); // (initial) po2 at start of segment
po2f = lrint(o2 * depth_to_bar(sample->depth.mm, dive)); // (final) po2 at end of segment
}
po2i = (po2i + po2f) / 2; // po2i now holds the mean po2 of initial and final po2 values of segment.
int po2avg = (po2i + po2f) / 2; // po2i now holds the mean po2 of initial and final po2 values of segment.
/* Don't increase CNS when po2 below 500 matm */
if (po2i <= 500)
if (po2avg <= 500)
continue;
// This formula is the result of fitting two lines to the Log of the NOAA CNS table
rate = po2i <= 1500 ? exp(-11.7853 + 0.00193873 * po2i) : exp(-23.6349 + 0.00980829 * po2i);
rate = po2i <= 1500 ? exp(-11.7853 + 0.00193873 * po2avg) : exp(-23.6349 + 0.00980829 * po2avg);
cns += (double) t * rate * 100.0;
}
return cns;