added vertex welding option for btTriangleMesh (brute-force slow) reject appendFace for some degenerate triangles (all 3 vertices/nodes need to be different) add setVelocity method for btSoftBody
added vertex welding option for btTriangleMesh (brute-force slow) reject appendFace for some degenerate triangles (all 3 vertices/nodes need to be different) add setVelocity method for btSoftBody