diff options
| -rw-r--r-- | profile.c | 9 |
1 files changed, 7 insertions, 2 deletions
@@ -1394,14 +1394,19 @@ static void fill_missing_segment_pressures(pr_track_t *list) * What's the pressure-time between two plot data entries? * We're calculating the integral of pressure over time by * adding these up. + * + * The units won't matter as long as everybody agrees about + * them, since they'll cancel out - we use this to calculate + * a constant SAC-rate-equivalent, but we only use it to + * scale pressures, so it ends up being a unitless scaling + * factor. */ static inline double pressure_time(struct dive *dive, struct plot_data *a, struct plot_data *b) { int time = b->sec - a->sec; int depth = (a->depth + b->depth)/2; - int mbar = depth_to_mbar(depth, dive); - return bar_to_atm(mbar / 1000.0) * time; + return depth_to_mbar(depth, dive) * time; } static void fill_missing_tank_pressures(struct dive *dive, struct plot_info *pi, pr_track_t **track_pr) |