diff options
Diffstat (limited to 'core/dive.h')
| -rw-r--r-- | core/dive.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/core/dive.h b/core/dive.h index 9c612048d..c968746f8 100644 --- a/core/dive.h +++ b/core/dive.h @@ -481,6 +481,17 @@ static inline depth_t gas_mod(struct gasmix *mix, pressure_t po2_limit, struct d return rounded_depth; } +/* Maximum narcotic depth rounded to multiples of roundto mm */ +static inline depth_t gas_mnd(struct gasmix *mix, depth_t end, struct dive *dive, int roundto) { + depth_t rounded_depth; + pressure_t ppo2n2; + ppo2n2.mbar = depth_to_mbar(end.mm, dive); + + double maxambient = ppo2n2.mbar / (1 - get_he(mix) / 1000.0); + rounded_depth.mm = rint(mbar_to_depth(maxambient, dive) / roundto) * roundto; + return rounded_depth; +} + #define SURFACE_THRESHOLD 750 /* somewhat arbitrary: only below 75cm is it really diving */ /* this is a global spot for a temporary dive structure that we use to |