1. A method of simulating relative motion of objects in computer animation comprising the steps of: providing a motion of a non-simulated object, where the non-simulated object is an element of a computer animation display and the non-simulated object has a spatial position and at least one surface; providing at least one simulated object associated with said non-simulated object, where said at least one simulated object is another element of the computer animation display and where motions and positions of said at least one simulated object are based on the motion and spatial position of the non-simulated object; selectively restraining the motions and positions of said at least one simulated object when said at least one simulated object is pinched by said at least one surface of the non-simulated object; and displaying the elements of the computer animation display, including associated motions and positions of said elements.