| 摘要 |
PURPOSE:To form various curved surfaces, and also to cope with even the continuous variation of the curved surface by forming a new curved surface by bringing the curved surface information of plural primitive curves surfaces to multiple interpolation and extrapolation. CONSTITUTION:Plural primitive curved surfaces P1-Pn are shown by the collection of position information of points of the surface, and when the number of points related to each curved surface coincides, the information of plural primitive curves surfaces P1-Pn can be made to correspondence. Multiple interpolation and extrapolation coefficients I1-In corresponding to each primitive curved surface P1-Pn, and curved surface information of the primitive curved surfaces P1-Pn are brought to a product sum operation by product sum operating means 21-2n and 3, and a new curved surface P by the multiple interpolation and extrapolation of plural primitive curved surfaces P1-Pn is formed. |
