A System for Computer Generated Movies

(1) This paper describes a system used to make computer generated movies.
(2) This paper explains the methods used to attempt to solve the problems of 
object representation, object manipulation, concurrent motion, and ease of 
specifying motion.
(3) Key points
 1). Hierarchical object representation using polygons
 2). Motion: object manipulation routines
 3). MOP: motion picture language to specify simutaneous and overlapping 
actions
 (4) Limitations:
 1) Can not solve problems of flexiable surfaces, which will introduce 
distortion.