| 3D Surface Editing Based on Level-Sets |
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| 作者姓名： | 林茂松 张典华 |
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| 作者单位： | [1]Institute of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China [2]School of Computer Science, Southwest University of Science and Technology, Mianyang 621010, China |
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| 基金项目： | Grants from the Engineering Physical Research Institute of China （No. 1999050235）, and Sichuan Province Science and Technology 0ffice Software Innovation Engineering of Youth （ No. 04hj027-027-320）. |
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| 摘 要： | A novel method which integrates the topological flexibility of the level-set approach and the simplicity of point-sampled surfaces is proposed. The grid structure resulted from the level-set approach not only offers a wide range of powerful surface editing techniques for the point set surface editing, but also facilitates the topological change with ease. With the aid of point-based resampling, the method updates the surface shape of the point-based geometry quickly without worrying about point connectivity at all. The point set surface can also change its topology properly whenever a collision with other parts of itself is detected. The experiment demonstrates their effectiveness on several scanned objects and scan-converted models. Four examples of surface editing operations： smoothing, tapering, deforming, and Boolean operations, are presented.
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| 关 键 词： | 计算机几何学 变形 布尔数学 3D物体 MLS 代数 |
| 文章编号： | 1005-2429（2005）02-0139-08 |
| 收稿时间： | 2004-12-13 |
3D Surface Editing Based on Level-Sets |
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| Lin Maosong,Zhang Dianhua.3D Surface Editing Based on Level-Sets[J].Journal of Southwest Jiaotong University,2005,13(2):139-146. |
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| Authors: | Lin Maosong Zhang Dianhua |
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| Abstract: | A novel method which integrates the topological flexibility of the level-set approach and the simplicity of point-sampled surfaces is proposed. The grid structure resulted from the level-set approach not only offers a wide range of powerful surface editing techniques for the point set surface editing, but also facilitates the topological change with ease. With the aid of point-based resampling, the method updates the surface shape of the point-based geometry quickly without worrying about point connectivity at all. The point set surface can also change its topology properly whenever a collision with other parts of itself is detected. The experiment demonstrates their effectiveness on several scanned objects and scan-converted models. Four examples of surface editing operations: smoothing, tapering, deforming, and Boolean operations, are presented. |
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| Keywords: | Computational geometry Level-set methods Point-based geometry Deformation |
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