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btQuaternion::slerp returns NaN for some inputs #665

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
btQuaternion::slerp suffers from some numerical problems. When used for very 
similar quaternions, it is possible that btFabs(product) > 1 holds. This will 
cause a call to btAcos with an invalid argument, ultimately resulting in a 
quaternion full of NaN's.

The attached patch fixes the problem.

Original issue reported on code.google.com by martin.heistermann on 26 Oct 2012 at 9:55

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GoogleCodeExporter commented 9 years ago 
Thanks for your help, I'll check it out soon.

Original comment by erwin.coumans on 26 Oct 2012 at 10:05

GoogleCodeExporter commented 9 years ago 
This issue was closed by revision r2623.

Original comment by erwin.coumans on 25 Nov 2012 at 5:19