wumpus-basic

Copperbox revision 2289.

I've changed the representation of PosObject so it always returns the BoundingBox of its orientation. This makes it easier to extend the shape (or pad it) as only the orientation and (possibly) the movement vector need changing. The resulting bounding box is calculated at rendering time.

The only real use case I have for PosObject needed the result to a bounding box, so this is no real loss of expressiveness.