一种精度可控的CAD网格模型及轻量化算法的研究  

CAD mesh model of controllable precision and lightweight algorithm

作　　者：刘云华[1] 饶刚毅 罗年猛[1] 朱林[1] 

机构地区：[1]华中科技大学国家CAD支撑软件工程技术研究中心,武汉430074

出　　处：《计算机应用研究》2014年第10期3148-3151,共4页Application Research of Computers

基　　金：国家自然科学基金资助项目(51075162;51375186);国家科技重大专项子课题(2011ZX02403-005)

摘　　要：针对现有三维CAD系统中,CAD网格模型显示精度固定,难以动态调整以及细分后网格数量过多等瓶颈问题,在原始模型基础上,结合CAD模型中边、面等几何与拓扑信息,提出了一种精度可控的三维CAD网格模型。根据该模型的结构特点,采用曲面内部插值与边界曲线插值相结合的轻量化分类细分算法来实现模型精度调整,并有效控制细分后的网格数量,可满足三维CAD系统对模型精度可控、减少网格数量的需要。In the existing three-dimensional CAD system, the precision of CAD mesh model is fixed. It cannot be dynanlically adjusted and may lead to the problem of an excessive number of meshes after subdivision and other bottlenecks. Based on the original model, this paper proposed a three-dimensional CAD mesh model of a controllable precision by combining the CAD model edges, faces, with other geometric and topological information. According to the structure of the model, this paper pro- posed a novel lightweight classification subdivision algorithm to adjust model precision by combining internal surface interpola- tion with boundary curve interpolation. This subdivision algorithm can effectively control the number of meshes after subdivi- sion and meet the needs of controllable precision and reducing the number of meshes of three-dimensional CAD model.

关 键 词：CAD网格模型 曲面内部插值 边界曲线插值 分类细分算法 精度可控 网格数量 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]