Planner: don't track cylinder pressure if working pressure is 0

The pressure graph will go from 0 to negative - one could make a weak
argument that this would at least tell you how much pressure you'd need in
the cylinder to start with, but that's kinda lame.

Fixes #615

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 4 insertions, 3 deletions

diff --git a/planner.c b/planner.c
index 0d6d77148..eed6202ea 100644
--- a/planner.c
+++ b/planner.c
@@ -275,7 +275,7 @@ static void create_dive_from_plan(struct diveplan *diveplan, bool track_gas)
 	oldgasmix = cyl->gasmix;
 	sample = prepare_sample(dc);
 	sample->po2.mbar = dp->po2;
-	if (track_gas)
+	if (track_gas && cyl->type.workingpressure.mbar)
 		sample->cylinderpressure.mbar = cyl->end.mbar;
 	finish_sample(dc);
 	while (dp) {
@@ -315,7 +315,7 @@ static void create_dive_from_plan(struct diveplan *diveplan, bool track_gas)
 			sample[-1].po2.mbar = po2;
 			sample->time.seconds = lasttime + 1;
 			sample->depth.mm = lastdepth;
-			if (track_gas)
+			if (track_gas && cyl->type.workingpressure.mbar)
 				sample->cylinderpressure.mbar = cyl->sample_end.mbar;
 			finish_sample(dc);
 			oldgasmix = gasmix;
@@ -331,7 +331,8 @@ static void create_dive_from_plan(struct diveplan *diveplan, bool track_gas)
 		if (track_gas) {
 			update_cylinder_pressure(&displayed_dive, sample[-1].depth.mm, depth, time - sample[-1].time.seconds,
 					dp->entered ? diveplan->bottomsac : diveplan->decosac, cyl, !dp->entered);
-			sample->cylinderpressure.mbar = cyl->end.mbar;
+			if (cyl->type.workingpressure.mbar)
+				sample->cylinderpressure.mbar = cyl->end.mbar;
 		}
 		finish_sample(dc);
 		dp = dp->next;