$LastChangedDate: 2008-02-25 03:11:43 -0500 (Mon, 25 Feb 2008) $

Module for collision-detection.

Collision is a Singleton that abstracts the exact collision-detection algorithm.
Collision::IfCollision() is passed a Dyna object.
That method is called every tick by Dyna::Tick().

In fact, collision-detection is based on ray intersection
using osg::IntersectionVisitor.
