基于递进网格的多层次模型编辑.pdfVIP

第 23 卷第 9 期 计算机学报 Vol. 23 :-ro. 9 2000 年 9 月 CHINESE J. COMPUTERS Sept. 2000 基于递进网格的多层次楠到编辑 \ \....~ 费广正1) 吴丽华1)幻 J 电、 叫中圈科学院软件研究所计算机科学开$:实聆雪 花京 100080) 21( 璃门大学科技学院 澳门) 摘 要 给出了一种基于递进闷恪的交豆豆式模型编辑 111 方法.该方法中把模骂自辛苦成由若千个斗、同的细节层次来表 示，对每一个层次均可进行单独编辅.在滑动层次中实现编辑操作的方法是将编棋院映射到二二维i间上，并在某上 对施加在 l反模型上的离散编辑借??进行椭值，再逆映射到原二二维模型，从附实现模型形状的修改。映射和锚僚算法 的高放是该算法可用于实时交互的关键另外，由于我们叫以将编辑倩息夜不同层次间进行传播，网此该方法可以 实现层次式模型编辑， 关键词 调和映射，激进网中备，日…佯条插僚，层次建模 中硕放分提4寄 TP391 LoD Editing Based on Pr吨ressive Mesh ll FEI Guang~Zhengl) WU En-Hua ?2) 1) (Labvratory of Computer Sdence. Imtltule 01 Sojiware , Ch. inese A?ade11l;Y of Scicnccs , Beijing ]00080) 2) (Faculty 01 Sciena . T(chnology , Univcrsity vf M刷刷 .M刷刷) Abstract This paper proposes a novel approach for interactively editing a triangular mesh based on level of detai l.日 y the approach. multiple levels of detail 3re generated first by using a methocl of improved progre阳 ive mesh to represent the original mesh. Designer then selects a level as 3n active level and a closed region from this level as an editing area. The idea of this approach in per? forming an editing operation is to embed the editing area of the active level onto a 2D rectangle and interpolate each component of the editing information in the rectangle that is then mapped back 10 the editing area. The ediling information al the active level could be automatically prop扣 gated onto all the