Supported jointly by the National Natural Science Foundation of China (Grant No. 69973041); Natural Science Foundation of Zhejiang Province (Grant No.698025) ; the Foundation of State Key Basic Research 973 Item (Grant No.G1998030600).
Developable surface plays an important role in engineering practice. And Bezier function surfaces on the rectangular and triangular domains are common representation forms in a computer aided geometric design system. ...
This work was supported by the National Natural Science Foundation of China (Grant No. 69973041) Natural Science Foundation of Zhejiang Province (Grant No. 698025) and the Foundation of State Key Basic Research 973 Project (Grant No. G1998030600).
This paper studies the multi-degree reduction of tensor product B(?)zier surfaces with any degree interpolation conditions of four corners, which is urgently to be resolved in many CAD/CAM systems. For the given condi...
Supported by the China Scholarship Council and the National Natural Science Foundation of China (Grant No. 69973041)
This paper shows how tight bounds for the range of a bivariate polynomial can be found using a matrix method based on affine arithmetic. Then, this method is applied to drawing an algebraic curve with a hierarchical a...
Project supported jointly by the National Natural Science Foundation of China (Grant No. 69973041), Zhejiang Provincial Natural Science Foundation (Grant No. 698025) and the Foundation of State Key Basic Research 973 Item (Grant No.G1998030600).
Through generalization of mathematical model of surface lofting program in the CONSURF system, the definitions for two generalized Ball surfaces and their recursive algorithms are given. Furthermore, the conversion al...