| 摘要 |
PURPOSE:To promptly obtain blurred surface data at an equivalent quality by forming a surface in a prescribed form using an intersection line obtained by an intersection line arithmetic means for a part of the contour line together with the other contour line, and making the surface into the blurred surface data. CONSTITUTION:A reference point selecting means M1 sets two reference points on one curved surface, and the reference points are selected from a cross part such as the intersections of the two adjacent curved surfaces or the intersection lines. A reference surface selecting means M2 selects a reference surface from the two reference points. The intersection line between the reference surface and the curved surface is calculated by an intersection line arithmetic means M3, while, since the intersection line passes through the reference point, it is preferable for the contour line of the blurred surface. Consequently by using the contour line, and forming the blurred surface by a blurred surface data arithmetic means M4, a part abutted by the said three surfaces or more is automatically coated as the preferable blurred surface. Thus the blurred surface data can be promptly obtained at the equivalent quality. |
