CAD网格模型的尖锐特征重建  

Reconstruction of Sharp Feature on CAD Mesh Model

作　　者：沈建国[1] 张三元[1] 陈志杨[2] 叶修梓[1] 

机构地区：[1]浙江大学CAD&CG国家重点实验室,杭州310027 [2]浙江工业大学,杭州310014

出　　处：《中国机械工程》2009年第11期1311-1315,共5页China Mechanical Engineering

基　　金：国家863高技术研究发展计划资助项目(2007AA01Z311,2007AA04Z1A5);高等学校博士学科点专项科研基金资助项目(20060335114);浙江省科技攻关计划资助项目(2007C21006)

摘　　要：提出了一种针对CAD网格的尖锐特征快速重建算法。首先根据用户输入识别出特征区域,然后利用非特征区域面片的法矢增量式计算特征区域面片的新法矢,最后根据新法矢调整网格顶点的位置。该算法不仅能从圆角特征和倒角特征构建尖锐特征,还能从含有噪声的一般特征构建尖锐特征。实验结果表明,该算法能快速生成CAD网格的尖锐边和尖锐点。A fast sharp feature reconstruction algorithm for CAD mesh was proposed herein. Depending on the user inputs, the algorithm detected mesh feature to be reconstructed, and then incre- mentally calculated the new face normals of the feature region according to the ones of the non-feature region. Finally, the vertex positions were adjusted based on those new normals. It can deal with the chamfered or blended sharp features on the mesh, and the common features with noise. The experimental results demonstrate that the algorithm can fast construct sharp edges and sharp vertices on the CAD mesh, and has broad practical value.

关 键 词：CAD网格 二维流形 尖锐特征 锐化 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]