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T-splines and T-NURCCs

chentao807 添加于 2010-3-13 14:55 | 3065 次阅读 | 0 个评论

作者
Sederberg TW, Zheng J, Bakenov A, Nasri A
摘要
This paper presents a generalization of non-uniform B-spline surfaces called T-splines. T-spline control grids permit T-junctions, so lines of control points need not traverse the entire control grid. T-splines support many valuable operations within a consistent framework, such as local refinement, and the merging of several B-spline surfaces that have different knot vectors into a single gap-free model. The paper focuses on T-splines of degree three, which are C² (in the absence of multiple knots). T-NURCCs (Non-Uniform Rational Catmull-Clark Surfaces with T-junctions) are a superset of both T-splines and Catmull-Clark surfaces. Thus, a modeling program for T-NURCCs can handle any NURBS or Catmull-Clark model as special cases. T-NURCCs enable true local refinement of a Catmull-Clark-type control grid: individual control points can be inserted only where they are needed to provide additional control, or to create a smoother tessellation, and such insertions do not alter the limit surface. T-NURCCs use stationary refinement rules and are C² except at extraordinary points and features.
详细资料
- 文献种类:会议
- 会议: ACM SIGGRAPH 2003 Papers
- 期卷页: 2003年 477页
- 出版社: ACM Press
- 位置: San Diego, California
- 日期: 2003-
- ISBN: 1581137095
标签

T-spline T样条
相关链接 DOI URL
附件
T-splines and T-NURCCs
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T-Spline样条，允许存在T节点的样条曲线。