Floating point exception in GjkPairDetector::GetClosestPoint

2006-06-16T15:03:18+00:00

It is an early-out test for optimization.(if the distance between two objects is larger then the maxDistance, we are not interested in results). I disabled this optimizatoin (testing) by setting the maximum to 1e30f, so it should fail the early out optimization.

I'm not using exception handling, so I didn't realize it causes troubles.
I'll fix it.
Erwin

Statistics: Posted by Erwin Coumans — Fri Jun 16, 2006 3:03 pm

Floating point exception in GjkPairDetector::GetClosestPoint

2006-06-16T03:44:34+00:00

I'm trying to run the CcdPhysicsDemo and I get a floating point exception in GjkPairDetector::GetClosestPoints, line 82 in my version of the sources:

Code:

if ((delta > SimdScalar(0.0)) && (delta * delta > squaredDistance * input.m_maximumDistanceSquared))

It's caused by squaredDistance * input.m_maximumDistanceSquared where

Code:

   squaredDistance = SIMD_INFINITY   input.m_maximumDistanceSquared = 1.0E+30

the multiply results in +INF which triggers the exception.

Is this on purpose? What happens with the compare when one side is INF?

Statistics: Posted by SnadderLars — Fri Jun 16, 2006 3:44 am

Real-Time Physics Simulation Forum

Floating point exception in GjkPairDetector::GetClosestPoint

Floating point exception in GjkPairDetector::GetClosestPoint