public override BulletShape DuplicateCollisionShape(BulletWorld world, BulletShape srcShape, uint id)
{
BulletWorldUnman worldu = world as BulletWorldUnman;
BulletShapeUnman srcShapeu = srcShape as BulletShapeUnman;
return new BulletShapeUnman(BSAPICPP.DuplicateCollisionShape2(worldu.ptr, srcShapeu.ptr, id), srcShape.shapeType);
}