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Catch a possible NAN at insanely low but greater than zero speeds

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torsten 2009-09-22 14:22:49 +00:00 • committed by Tim Moore
parent 6db8687a75
commit 27d68533d7
1 changed files with 3 additions and 2 deletions
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5
src/Instrumentation/gps.cxx
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@ -476,8 +476,9 @@ GPS::updateTTWNode(UpdateContext& ctx, double distance_m, SGPropertyNode_ptr nod
// increase. Makes most sense when travelling directly towards
// the waypoint.
double TTW = 0.0;
if (ctx.speed_kt > 0.0 && distance_m > 0.0) {
TTW = (distance_m * SG_METER_TO_NM) / (ctx.speed_kt / 3600);
double speed_nm_per_second = ctx.speed_kt / 3600;
if (speed_nm_per_second > SGLimitsd::min() && distance_m > 0.0) {
TTW = (distance_m * SG_METER_TO_NM) / speed_nm_per_second;
}
if (TTW < 356400.5) { // That's 99 hours
unsigned int TTW_seconds = (int) (TTW + 0.5);