Control point removal algorithm for t-spline surfaces

Authors:
Yimin Wang;Jianmin Zheng
Affiliations:
School of Computer Engineering, Nanyang Technological University, Singapore;School of Computer Engineering, Nanyang Technological University, Singapore
Venue:
GMP'06 Proceedings of the 4th international conference on Geometric Modeling and Processing
Year:
2006

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Abstract

This paper discusses the problem of removing control points from a T-spline control grid while keeping the surface unchanged. An algorithm is proposed to detect whether a specified control point can be removed or not and to compute the new control points if the point is removable. The algorithm can be viewed as a reverse process of the T-spline local knot insertion algorithm. The extension of the algorithm to remove more control points is also discussed.