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- Thomas W. Sederberg, Scott R. Parry
- SIGGRAPH
- 1986

A technique is presented for deforming solid geometric models in a free-form manner. The technique can be used with any solid modeling system, such as CSG or B-rep. It can deform surface primitivesâ€¦ (More)

- Thomas W. Sederberg, Jianmin Zheng, Almaz Bakenov, Ahmad H. Nasri
- ACM Trans. Graph.
- 2003

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 controlâ€¦ (More)

- Thomas W. Sederberg, David L. Cardon, G. Thomas Finnigan, Nicholas S. North, Jianmin Zheng, Tom Lyche
- ACM Trans. Graph.
- 2004

A typical NURBS surface model has a large percentage of superfluous control points that significantly interfere with the design process. This paper presents an algorithm for eliminating suchâ€¦ (More)

- Tomoyuki Nishita, Thomas W. Sederberg, Masanori Kakimoto
- SIGGRAPH
- 1990

This paper presents a new algorithm for computing the points at which a ray intersects a rational B&eacute;zier surface patch, and also an algorithm for determining if an intersection point liesâ€¦ (More)

- Thomas W. Sederberg, Eugene Greenwood
- SIGGRAPH
- 1992

This paper presents a new algorithm for smoothly blending between two 2{D polygonal shapes. The algorithm is based on a physical model wherein one of the shapes is considered to be constructed ofâ€¦ (More)

- Thomas W. Sederberg, Jianmin Zheng, David Sewell, Malcolm A. Sabin
- SIGGRAPH
- 1998

Doo-Sabin and Catmull-Clark subdivision surfaces are based on the notion of repeated knot insertion of uniform tensor product B-spline surfaces. This paper develops rules for non-uniform Doo-Sabinâ€¦ (More)

- Henry N. Christiansen, Thomas W. Sederberg
- SIGGRAPH
- 1978

A simple algorithm is presented for processing complex contour arrangements to produce polygonal element mosaics which are suitable for line drawing and continuous tone display. The program proceedsâ€¦ (More)

- Thomas W. Sederberg, Peisheng Gao, Guojin Wang, Hong Mu
- SIGGRAPH
- 1993

This paper presents an algorithmfor determiningthe paths along which corresponding vertices travel in a 2â€“D shape blending. Rather than considering the vertex paths explicitly, the algorithm definesâ€¦ (More)

- Peisheng Gao, Thomas W. Sederberg
- The Visual Computer
- 1998

We present an algorithm for morphing two images, often with little or no user interaction. For two similar images (such as different faces against a neutral background), the algorithm generally canâ€¦ (More)

- Xin Li, Jianmin Zheng, Thomas W. Sederberg, Thomas J. R. Hughes, Michael A. Scott
- Computer Aided Geometric Design
- 2012

This paper shows that, for any given T-spline, the linear independence of its blending functions can be determined by computing the nullity of the T-spline-to-NURBS transform matrix. The paperâ€¦ (More)