| 摘要 |
An improved unique form creating system is disclosed which provides for free access to a form to be created throughout its whole process ranging from its first step or model design step to its final step or manufacturing step. There are also similar devices such as a device which is capable of easily detecting the position of an intersection point between a predetermined straight line and a predetermined plane, a device capable of cutting a predetermined plane linearly or curvedly to provide its sectional face with ease, a device capable of easily finding a contour line of intersection of bodies, i.e., a continuum of intersection points between a predetermined surface and its partner surface, or a controlling or processing device operable based on each of the above-mentioned devices. A predetermined surface is divided into a predetermined number of surfaces to detect an intersection point of the predetermined surface with a predetermined straight line out of the thus-divided surfaces. To obtain the contour line, one of two surfaces is divided into a large number of surfaces, intersecting surfaces are detected out of the thus-divided surfaces, and then these intersecting surfaces are joined together. An operation to divide a triangle into four smaller triangles may be sequentially repeated a desired number of times so as to provide a dense polyhedron.
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