btConvexHullShape ::btConvexHullShape

[sparkprime]

Why does btConvexHullShape ::btConvexHullShape take a btScalar* when internally it casts the data to btPoint3 objects? I just ran into a problem where btPoint3 is actually 16 bytes wide but i was feeding in an array of btScalars with a stride of 12.

[Erwin Coumans]

The btConvexHullShape uses a default stride of 16 bytes between vertices. If your stride is different, like 12 bytes, please pass the actual stride as 3rd argument. From btConvexHullShape.h:

Code: Select all

        ///btConvexHullShape make an internal copy of the points.
        btConvexHullShape(const btScalar* points=0,int numPoints=0, int stride=sizeof(btPoint3));

Alternatively you can use the btConvexTriangleMeshShape, and pass in a btStridingMeshInterface.
Hope this helps,
Erwin