COMPUTER ANIMATION GENERATOR CREATING HIERARCHIES OF MODELS FOR RAPID DISPLAY

A drawing method of computer graphics in which an approximation of a model is executed in consideration of a target point of the observer, a position of model, a size of model on a picture plane, and a moving speed of model are considered and, further, a feeling of physical disorder that is given to the eyes of a human being is reduced is provided. Geometric model data inputted in step S1 is subjected to a filtering process in order to reduce a complexity of the model in step S2 and an outline of the model is extracted in step S3. As for the model from which the outline was extracted, characteristic points to which the human being largely react are extracted from such an outline in step S4. The processes in steps S2 to S4 are executed by a number of times as many as the number of necessary hierarchies (step S5). The characteristic points extracted every hierarchy in step S4 are made correspond among the hierarchies in step S6. The geometric model in a proper hierarchy is selected from the hierarchical approximated models obtained by the procedure in steps S2 to S6 in accordance with a state of the input geometric model in step S7. The selected geometric model is drawn as a computer graphics picture plane in step S8.