| 摘要 |
A CAD system and a CAD program capable of significantly increasing the utility value of a CAD model and efficiency of the design/production process by employing the theory of surfaces guaranteeing the continuity of a free curve/curved surface. The program causes a computer to execute a point sequence extraction processing for extracting a plurality of point sequences on a curved surface, a division processing for generating a curved surface from a point sequence by using another CAD system and dividing the curved surface into a predetermined number of meshes, a primary standard amount calculation processing for calculating a primary standard amount defined by a tangent vector forming a mesh tangent plane, a secondary standard amount calculation processing for calculating a secondary standard amount defined by a tangent vector and a mesh normal vector, and a storage processing for storing the point sequence information, the first standard amount, and the second standard amount.
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