AN ANIMATION SYSTEM FOR RIGID AND DEFORMABLE MODELS
 
                  Ugur Gudukbay 1, Bulent Ozguc 1, and Yilmaz Tokad 2

1 Bilkent University, Department of Computer Engineering and Information 
  Science, Bilkent, Ankara, Turkey

2 Bilkent University, Department of Mathematics, 06533 Bilkent, Ankara, Turkey

Abstract - We  describe a system for  the animation of  rigid and  deformable  models. 
The system uses  the approaches from elasticity theory for animating  the  models. Two 
different   formulations,  namely  the  primal  and   the   hybrid  formulations,  are 
implemented so that the user could select the  suitable one for an animation depending 
on the rigidity of the models. Collision of the models with impenetrable obstacles and 
constraining model points to fixed positions in  space are implemented  for use in the 
animations.