Hi, I was wondering about how you would do physics simulation and collision detection on a model that can be animated? Would you make the physics engine animate the model so it has all the information on it? I dont really like that idea because then the physics system would need all the keyframe info and the animator would not be as modular as I would like. Would you create joints and apply forces? This seems computationally expensive for something that doesnt really need it? Is it as simple as making a object stack and allowing manipulation of each level of the stack (arms, legs) with matrix ops? Or do you simply add an non-animating object, either a convex hull or BB and then the animating model is only graphics?