Improve gas accounting in the panner

When using gasmixes where the difference is less than 2% the planner can't
caclulate casconsumptions correctly. This sets the minimum gasdifference
to 1%.

Fixes subsurface#795

Signed-off-by: Joakim Bygdell <j.bygdell@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

planner.c

@@ -115,7 +115,7 @@ int get_gasidx(struct dive *dive, struct gasmix *mix)
 	int gasidx = -1;
 
 	while (++gasidx < MAX_CYLINDERS)
-		if (gasmix_distance(&dive->cylinder[gasidx].gasmix, mix) < 200)
+		if (gasmix_distance(&dive->cylinder[gasidx].gasmix, mix) < 100)
 			return gasidx;
 	return -1;
 }
@@ -210,7 +210,7 @@ static int verify_gas_exists(struct gasmix mix_in)
 		cyl = displayed_dive.cylinder + i;
 		if (cylinder_nodata(cyl))
 			continue;
-		if (gasmix_distance(&cyl->gasmix, &mix_in) < 200)
+		if (gasmix_distance(&cyl->gasmix, &mix_in) < 100)
 			return i;
 	}
 	fprintf(stderr, "this gas %s should have been on the cylinder list\nThings will fail now\n", gasname(&mix_in));

qt-ui/diveplanner.cpp

@@ -1112,7 +1112,7 @@ bool DivePlannerPointsModel::tankInUse(struct gasmix gasmix)
 			continue;
 		if (!p.entered) // removing deco gases is ok
 			continue;
-		if (gasmix_distance(&p.gasmix, &gasmix) < 200)
+		if (gasmix_distance(&p.gasmix, &gasmix) < 100)
 			return true;
 	}
 	return false;
@@ -1139,7 +1139,7 @@ void DivePlannerPointsModel::tanksUpdated()
 					struct gasmix gas;
 					gas.o2.permille = oldGases.at(i).first;
 					gas.he.permille = oldGases.at(i).second;
-					if (gasmix_distance(&gas, &p.gasmix) < 200) {
+					if (gasmix_distance(&gas, &p.gasmix) < 100) {
 						p.gasmix.o2.permille = gases.at(i).first;
 						p.gasmix.he.permille = gases.at(i).second;
 					}