简单几何约束变形与细分曲面的形状编辑  

Simple geometric constrained deformation and shape editing of subdivision surfaces

作　　者：张湘玉[1] 廖文和[1] 刘浩[1] 

机构地区：[1]南京航空航天大学机电学院,江苏南京210016

出　　处：《江苏大学学报（自然科学版）》2009年第2期118-123,共6页Journal of Jiangsu University：Natural Science Edition

基　　金：国防基础科研基金资助项目

摘　　要：将简单几何约束变形与Catmull-Clark细分规则相结合,首先,在当前细分层次网格上按要求施加相关的约束变形特征以及设定变形区域;然后,由细分规则得到这些约束变形特征及变形区域在随后细分各层次网格之间的传递映射关系;最后,在所要求的细分层次网格上重新作用简单几何约束变形,得到最终变形结果.试验证明,此编辑变形算法简单直观,具有良好的实时交互性,同时在整个细分过程中,保证满足相应的约束要求,未来可以考虑将其应用于CAD/CAM和计算机动画中.Combining the simple geometric constrained deformation with the Catmull-Clark subdivision algorithm,the deformation process included three steps.Firstly,some interrelated constrained deforming features and the range of deformation were designed and put on the given subdivision level mesh of an object.Secondly,according to the subdivision algorithm,the image of the constraint deforming features and the range of deformation at successive subdivision levels were resolved.At last,the simple geometric constrai-ned deformation method was again applied to the required successive subdivision level.Experiments show that this deformation algorithm is straightforward,interactive easily,and can satisfy constrained features in any subdivision level.In the future,it is expected to be used in CAD software and computer animation.

关 键 词：细分曲面 变形 几何约束 交互技术 计算机辅助设计 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]