New multiresolution modeling techniques in CAD

Authors:
Jinxing Yin;Guanlong Chen;Zhongqin Lin
Affiliations:
School of Mechanical Engineering, Auto Body Manufacturing Technology Center (B.M.T.C), Shanghai Jiaotong University, Shanghai 200030, People's Republic of China;School of Mechanical Engineering, Auto Body Manufacturing Technology Center (B.M.T.C), Shanghai Jiaotong University, Shanghai 200030, People's Republic of China;School of Mechanical Engineering, Auto Body Manufacturing Technology Center (B.M.T.C), Shanghai Jiaotong University, Shanghai 200030, People's Republic of China
Venue:
Computer-Aided Design
Year:
2006

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Abstract

To apply wavelet transformation to CAD surface model composed of multiple surface patches, an algorithm called wavelet signal separation to preserve geometric constraints during wavelet transformation is proposed. The algorithm divides the B-spline control points into those associated and those unassociated with the geometric constraints. Through preserving the signal information associated with the constraint control points, the geometric constraints can be automatically preserved after wavelet transformation. This paper also briefly investigates two types of the detail feature propagation technique in wavelet-based multiresolution CAD system. One is detail feature motion. The other is detail feature repetition. Finally, a comprehensive example is presented to illustrate the effects of the combination of those techniques.