| 摘要 |
PROBLEM TO BE SOLVED: To provide a CAD program that expresses the warp or distortion of an article in a simple way to allow easy simulations of the article. SOLUTION: The free curve specification means 2 of a computer 1 specifies a quintic free curve A using two passing points B1, B2 which a cord- or band-shaped flexible article to be simulated passes therethrough, control points C1, C2 positioned on the tangential line of the passing points B1, B2, and two control points D1, D2. A display means 3 sweeps the cross-sectional shape of the article along the quintic free curve specified by the free curve specification means 2 to display the three-dimensional shape of the article in a display device 4. Because the warp or distortion of the article can be expressed as the control points C1, C2 and the control points D1, D2 are changed in position, it is easy to simulate. COPYRIGHT: (C)2005,JPO&NCIPI
|
