Origination system of surface form, origination method of surface form and record medium of program

摘要

This invention, basically, calls the specified multilateral form plane surface patch the multilateral form plane surface patch of level, 0 when each apex of the multilateral form plane surface patch of the above-mentioned level 0 is called the form constitution point of level 0, the form constitution point of the above-mentioned level 0 respectively, sets the normal line of level, 0 normal line and equivalence of the above-mentioned level 0 disassembles the normal line of the respective level 0 which it describes sets with respect to tangential plane. Furthermore, facing toward the same direction as the side of the multilateral form plane surface patch of the above-mentioned level 0 or the vicinity of there by disassembling, the tangential line of level 0 is set, normal line is set on the form constitution point and the form constitution point of level 1 on the basis of the tangential line of two above-mentioned levels 0. It is the form origination system which features that surface form is formed by the fact that these expedients are controlled repeatedly recursively one by one.