| 摘要 |
PROBLEM TO BE SOLVED: To make efficiently generable a three-dimensional shape model in a short time in the vehicle body shape design through the use of a CAD/CAM system. SOLUTION: Geometric elements and a restricting condition inputted as two-dimensional display marks are fetched from an input means 11 as the configuration elements of a three-dimensional geometric restricting model where a condition for defining the three-dimensional shape model is expressed in two- dimension and the three-dimensional geometric model is expressed by graph in a three-dimensional geometric restricting model generating means 13. Then, in a three-dimensional geometric restricting model analyzing means 14, the three-dimensional geometric restricting model which is expressed by graph is analyzed, a definition condition table is referred to and, then, the preparation order of the geometric elements for constituting the three-dimensional shape model and its defining method are obtained. Then, in a three-dimensional shape model generating means 15, the three-dimensional shape model is generated in accordance with the obtained preparation order and the defining method of the geometric elements for constituting the three-dimensional shape model.
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