发明名称 |
Free-form surface generation from detected geometric continuity on common NURBS boundary curve |
摘要 |
A free-form surface generating method. There is a generating of a continuity condition by detecting a continuity on a common boundary of two free-form surfaces based on tangent vectors on a NURBS common boundary curve and tangent vectors on boundary curves continuous to end points of the NURBS common boundary curve. Next, one of a plurality of predetermined joining processes is selected in accordance with the continuity condition. Then, internal control points of each of the two free-form surfaces are generated based on the selected joined with continuity on the common boundary are generated.
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申请公布号 |
US5883631(A) |
申请公布日期 |
1999.03.16 |
申请号 |
US19970925770 |
申请日期 |
1997.09.09 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
KONNO, KOUICHI;CHIYOKURA, HIROAKI |
分类号 |
G06F17/50;G06T15/00;G06T17/30;(IPC1-7):G06T17/20 |
主分类号 |
G06F17/50 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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