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MODELING METHOD BY EXAMPLES
QIN Xujia1, 2 XU Xiaogang3
(1.College of Software, Zhejiang University of Technology, Hangzhou 310032;
2. State Key Lab of CAD&CG, Zhejiang University, Hangzhou 310027;
3. Department of Equipment System and Automatization, Dalian Naval Academy, Dalian 116018
)
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Abstract: A new geometry modeling method by examples is presented. The method constructs a new model from two or more existed models by cutting some useful parts from source models and pasting to target model. A novel cut-and-paste algorithm for mesh models based on implicit surface Boolean operations is proposed. Firstly, cut part of mesh from source model and align it with the target model. Secondly, convert the two mesh models into point models and convert the point models into implicit surfaces with radial basis function (RBF) interpolation. Then merge the two implicit surfaces by union operation. Finally, polygonize the implicit surface after operation and the final new mesh model is obtained. Because the Boolean operation dose not use mesh models directly in this algorithm, so complex and time consume intersection calculations of facets and edges can be avoided. The experiments show that good results can be obtained with the algorithm. The approach can be used to create special and exaggerated models for computer animation.
Key words: Modeling
Cut-and-paste
Mesh models
Boolean operations
Implicit surface
CLC No: TP391
国家自然科学基金(60673063，60473141)、浙江省自然科学基金 (Y104341)和浙江大学CAD&CG国家重点实验室开放课题基金资助项目. Received 20060511, received in revised form 20061024
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