Real-Time Physics Simulation Forum

Re: Best way to check if a point is inside a convex hull sha

2013-06-24T01:45:21+00:00

I was hoping that the isInside had been updated on the more recent versions but it doesn't seem to be. Did you end up getting your project working with checking if a point is inside the convex hull?

I am also in need of this for my research application. I am very new to bullet and don't quite see how to use the btGjkPairdetector. Do I only need to set a radius of the btSphereShape or can I also set a point for the center to be at?

Statistics: Posted by damanb — Mon Jun 24, 2013 1:45 am

Re: Best way to check if a point is inside a convex hull sha

2012-10-24T22:21:24+00:00

Ah! thank you, sir!

Statistics: Posted by cgripeos — Wed Oct 24, 2012 10:21 pm

Re: Best way to check if a point is inside a convex hull sha

2012-10-24T21:59:04+00:00

You can use the btCollisionWorld::contactPairTest.

Object 1 = convex hull
Object 2 = btSphereShape with zero radius

Alternatively, you can go low level (digg into the source code) and use btGjkPairDetector directly. See Demos\ConvexHullDistance\ConvexHullDistanceDemo.cpp.

Statistics: Posted by Erwin Coumans — Wed Oct 24, 2012 9:59 pm

Best way to check if a point is inside a convex hull shape?

2012-10-24T17:33:24+00:00

The reason I ask is because raycasts don't work if the begin and end point of the ray is inside a convex hull shape, so for convex shapes I tried to use the isInside() method and found out that it's not implemented for btConvexHullShape nor btConvexPointCloudShape.

Thanks in advance for any help.
cg

Statistics: Posted by cgripeos — Wed Oct 24, 2012 5:33 pm