| 摘要: |
| 隐式曲面没有参数域的概念,故对其裁剪问题的研究,很少有人问津.提出了一种隐式裁剪曲面的造型和绘制方法:先把投影平面变换到xy平面,将该xy平面作正交化网格剖分,由参数表示或隐式表示的裁剪曲线在该xy平面定义裁剪区域,再把裁剪后留下的区域内的网格投影到隐式曲面上,从而实现了隐式裁剪曲面的多边形化绘制. |
| 关键词: 隐式裁剪曲面 造型 绘制 裁剪曲线 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(69823003);国家杰出青年基 金资助项目(68625304);国家科技部“九五”重大攻关资助项目(96-A01-02-01);中国博 士后科学基金资助项目 |
|
| Modeling and Rendering of Implicit Trimmed Surfaces |
|
YU Zhen sheng,PENG Qun sheng,MA Li zhuang,WU Qi di,LI Qi yan
|
| Abstract: |
| Implicit trimmed surfaces are rarely studied since they have no parametric domai n. A method which is related to modeling and rendering of implicit trimmed surfa ces is presented in this paper. First the projection plane is transformed into xy-plane in which the regular grids are partitioned and trimmed areas are d efined by a parametric/implicit curve, then the grids left after trimming are pr ojected onto the implicit surfaces so as to realize polygonization of the implic it trimmed surfaces. |
| Key words: implicit trimmed surface modeling ren dering trimmed curve |
