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Implement planner option to switch only at required stops

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When option is enabled, if a stop is not otherwise required, a gas switch will be delayed until a stop is reached.  This option is ignored if the current gas is hypoxic.

Signed-off-by: Rick Walsh <rickmwalsh@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Rick Walsh 2015-06-22 22:43:20 +10:00 • committed by Dirk Hohndel
parent 425020d2de
commit f763da66b3
1 changed files with 36 additions and 12 deletions
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48
planner.c
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@ -876,6 +876,7 @@ bool plan(struct diveplan *diveplan, char **cached_datap, bool is_planner, bool
int gaschangenr;
unsigned int *stoplevels = NULL;
bool stopping = false;
bool pendinggaschange = false;
bool clear_to_ascend;
int clock, previous_point_time;
int avg_depth, max_depth, bottom_time = 0;
@ -1041,7 +1042,7 @@ bool plan(struct diveplan *diveplan, char **cached_datap, bool is_planner, bool
if (depth <= 0)
break; /* We are at the surface */
if (gi >= 0 && stoplevels[stopidx] == gaschanges[gi].depth) {
if (gi >= 0 && stoplevels[stopidx] <= gaschanges[gi].depth) {
/* We have reached a gas change.
* Record this in the dive plan */
plan_add_segment(diveplan, clock - previous_point_time, depth, gas, po2, false);
@ -1049,21 +1050,29 @@ bool plan(struct diveplan *diveplan, char **cached_datap, bool is_planner, bool
stopping = true;
/* Check we need to change cylinder.
* We might not if the cylinder was chosen by the user */
* We might not if the cylinder was chosen by the user
* or user has selected only to switch only at required stops.
* If current gas is hypoxic, we want to switch asap */
if (current_cylinder != gaschanges[gi].gasidx) {
current_cylinder = gaschanges[gi].gasidx;
gas = displayed_dive.cylinder[current_cylinder].gasmix;
if (!prefs.switch_at_req_stop ||
!trial_ascent(depth, stoplevels[stopidx - 1], avg_depth, bottom_time, tissue_tolerance,
&displayed_dive.cylinder[current_cylinder].gasmix, po2, diveplan->surface_pressure / 1000.0) || get_o2(&displayed_dive.cylinder[current_cylinder].gasmix) < 160) {
current_cylinder = gaschanges[gi].gasidx;
gas = displayed_dive.cylinder[current_cylinder].gasmix;
#if DEBUG_PLAN & 16
printf("switch to gas %d (%d/%d) @ %5.2lfm\n", gaschanges[gi].gasidx,
(get_o2(&gas) + 5) / 10, (get_he(&gas) + 5) / 10, gaschanges[gi].depth / 1000.0);
printf("switch to gas %d (%d/%d) @ %5.2lfm\n", gaschanges[gi].gasidx,
(get_o2(&gas) + 5) / 10, (get_he(&gas) + 5) / 10, gaschanges[gi].depth / 1000.0);
#endif
/* Stop for the minimum duration to switch gas */
tissue_tolerance = add_segment(depth_to_mbar(depth, &displayed_dive) / 1000.0,
&displayed_dive.cylinder[current_cylinder].gasmix,
prefs.min_switch_duration, po2, &displayed_dive, prefs.decosac);
clock += prefs.min_switch_duration;
}
/* Stop for the minimum duration to switch gas */
tissue_tolerance = add_segment(depth_to_mbar(depth, &displayed_dive) / 1000.0,
&displayed_dive.cylinder[current_cylinder].gasmix,
prefs.min_switch_duration, po2, &displayed_dive, prefs.decosac);
clock += prefs.min_switch_duration;
} else {
pendinggaschange = true;
}
gi--;
}
}
--stopidx;
@ -1085,6 +1094,21 @@ bool plan(struct diveplan *diveplan, char **cached_datap, bool is_planner, bool
stopping = true;
}
if (pendinggaschange) {
current_cylinder = gaschanges[gi + 1].gasidx;
gas = displayed_dive.cylinder[current_cylinder].gasmix;
#if DEBUG_PLAN & 16
printf("switch to gas %d (%d/%d) @ %5.2lfm\n", gaschanges[gi + 1].gasidx,
(get_o2(&gas) + 5) / 10, (get_he(&gas) + 5) / 10, gaschanges[gi + 1].depth / 1000.0);
#endif
/* Stop for the minimum duration to switch gas */
tissue_tolerance = add_segment(depth_to_mbar(depth, &displayed_dive) / 1000.0,
&displayed_dive.cylinder[current_cylinder].gasmix,
prefs.min_switch_duration, po2, &displayed_dive, prefs.decosac);
clock += prefs.min_switch_duration;
pendinggaschange = false;
}
/* Deco stop should end when runtime is at a whole minute */
int this_decotimestep;
this_decotimestep = DECOTIMESTEP - clock % DECOTIMESTEP;