Real-Time Physics Simulation Forum

I'm attempting to implement box selection of objects. I've created a btCollisionWorld, and I'm calling contactTest() with a btConvexHullShape constructed from the corners of the selection box unprojected to the camera's near and far planes.

Now, if I place the first corner of the selection box just on the edge of an object, the object will flicker between being selected or not as I drag the other corner of the selection box around. Any suggestions for eliminating this behavior? Or is there a better approach I should be using?

I would suggest using the broadphase AABBs to perform the test, there is an API for that.

Are you referring to btDbvt::collideKDOP(), which looks like it would let me test the frustum created from the box selection against the AABBs of the objects in the scene?

Yes. There is some old project that had really nice occlusion culling option, base on this.

See https://github.com/erwincoumans/bullet2 ... t.cpp#L910