The animation of 3D computer generated models is a rapidly growing part
of the animation industry. One of the major criticisms that traditional
animators have of this art form is the apparent inability to generate
characters that can make the dynamic shape changes seen in hand
Recent work with SOFT objects, which change shape as they move, has
proved to be a promising method for producing such characters.
Specifying such changes is a complicated task which has received little
attention in the literature largely because it is difficult to represent
such objects using existing techniques.
The SOFT objects presented here are represented by a surface constructed
around a set of key-points and lines. This paper summarises previous
work on SOFT objects and introduces some new field functions for
their representation. Some methods are presented for describing the
animation of SOFT objects, by determining the motion of the key points
using both mathematical descriptions and physical simulations.
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