I am using contactTest to get contact between a sphere/capsule and different types of collision objects. In my custom callback, I use m_normalWorldOnB for normals but It is not the surface normal, it is the normal between collision points I believe.
For example if it is an endless plance looks from 0,0,0 to 0,0,1 I want the 0,0,1, how can I find the surface normal for collisions? I believe rayTest gives such normal, so after the contactTest I tried to use rayTestSingle but couldn't make it.
Getting surface normal from manifold
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drleviathan
- Posts: 849
- Joined: Tue Sep 30, 2014 6:03 pm
- Location: San Francisco
Re: Getting surface normal from manifold
My experience has been that btManifoldPoint::m_normalWorldOnB is pretty accurate as to the surface normal of the contact so I would expect it to be usable for most applications.
Meanwhile the btSingleRayCallback method should also work in theory. You would test a ray against the other collision object aimed at the contact point.
Post a link to your demo code and maybe someone will have time to look it over.
Meanwhile the btSingleRayCallback method should also work in theory. You would test a ray against the other collision object aimed at the contact point.
Post a link to your demo code and maybe someone will have time to look it over.