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Take gas consumption into account for recreational mode

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If there is valid gas information (cylinder size and starting pressure),
also ascent before gas runs out (taking a 40bar reserve into account).

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 2015-04-04 18:38:56 +02:00 • committed by Dirk Hohndel
parent acaedee159
commit e03c5ce8e9
1 changed files with 32 additions and 2 deletions

34
planner.c
View file

@ -17,6 +17,8 @@
#define TIMESTEP 3 /* second */
#define DECOTIMESTEP 60 /* seconds. Unit of deco stop times */
#define RESERVE 40000 /* Remaining gas in recreational mode */
int decostoplevels[] = { 0, 3000, 6000, 9000, 12000, 15000, 18000, 21000, 24000, 27000,
30000, 33000, 36000, 39000, 42000, 45000, 48000, 51000, 54000, 57000,
60000, 63000, 66000, 69000, 72000, 75000, 78000, 81000, 84000, 87000,
@ -800,6 +802,17 @@ int ascend_velocity(int depth, int avg_depth, int bottom_time)
}
}
void track_ascent_gas(int depth, cylinder_t *cylinder, int avg_depth, int bottom_time)
{
while (depth > 0) {
int deltad = ascend_velocity(depth, avg_depth, bottom_time) * TIMESTEP;
if (deltad > depth)
deltad = depth;
update_cylinder_pressure(&displayed_dive, depth, depth - deltad, TIMESTEP, prefs.bottomsac, cylinder, true);
depth -= deltad;
}
}
bool trial_ascent(int trial_depth, int stoplevel, int avg_depth, int bottom_time, double tissue_tolerance, struct gasmix *gasmix, int po2, double surface_pressure)
{
@ -825,6 +838,20 @@ bool trial_ascent(int trial_depth, int stoplevel, int avg_depth, int bottom_time
return clear_to_ascend;
}
bool enough_gas(int current_cylinder)
{
cylinder_t *cyl;
cyl = &displayed_dive.cylinder[current_cylinder];
if (!cyl->start.mbar)
return true;
if (cyl->type.size.mliter)
return (float) (cyl->end.mbar - RESERVE) * cyl->type.size.mliter / 1000.0 > (float) cyl->deco_gas_used.mliter;
else
return true;
}
int plan(struct diveplan *diveplan, char **cached_datap, bool is_planner, bool show_disclaimer)
{
struct sample *sample;
@ -906,16 +933,19 @@ int plan(struct diveplan *diveplan, char **cached_datap, bool is_planner, bool s
gi = gaschangenr - 1;
if(prefs.recreational_mode) {
bool safety_stop = prefs.safetystop && max_depth >= 10000;
track_ascent_gas(depth, &displayed_dive.cylinder[current_cylinder], avg_depth, bottom_time);
// How long can we stay at the current depth and still directly ascent to the surface?
while (trial_ascent(depth, 0, avg_depth, bottom_time, tissue_tolerance, &displayed_dive.cylinder[current_cylinder].gasmix,
po2, diveplan->surface_pressure / 1000.0)) {
po2, diveplan->surface_pressure / 1000.0) &&
enough_gas(current_cylinder)) {
tissue_tolerance = add_segment(depth_to_mbar(depth, &displayed_dive) / 1000.0,
&displayed_dive.cylinder[current_cylinder].gasmix,
DECOTIMESTEP, po2, &displayed_dive, prefs.bottomsac);
update_cylinder_pressure(&displayed_dive, depth, depth, DECOTIMESTEP, prefs.bottomsac, &displayed_dive.cylinder[current_cylinder], false);
clock += DECOTIMESTEP;
}
clock -= DECOTIMESTEP;
plan_add_segment(diveplan, clock - previous_point_time, depth, gas, po2, false);
plan_add_segment(diveplan, clock - previous_point_time, depth, gas, po2, true);
previous_point_time = clock;
do {
/* Ascend to surface */