【摘要】 在作者建立的基于NURBS的曲面造型软件包中,对于曲面求交、消隐及光照的实现进行了探索。开发了曲面分割求交算法,建立了基于目标空间和图像空间的曲面线消隐算法,利用扫描线算法绘出光滑逼真的曲面光照图。这些算法实现稳定可靠,具有一定的通用性。更多还原

【Abstract】 In the surface modeling system set up by the authors, some key algorithms such as finding intersection lines, removing hidden lines and shading are realized. An algorithms based on subdivision is used to find the intersection lines of surfaces. Using image and object space algorithm, surfaces are displayed with hidden lines removed. Shading pictures are generated with scan-line algorithm. The system can run robusdy and accurately with these algorithms.更多还原