In a 3-dimensional animation generating apparatus which uses a computer, the user generates a number of static images having parent-child relationships and which serve as key frames in the sequence from the start to the end of the animation, a number of animation frames specified by the user being automatically...http://www.google.com.au/patents/US5619628?utm_source=gb-gplus-sharePatent US5619628 - 3-Dimensional animation generating apparatus
