Curved surface molding method combing interpolation type subdivision and approach type subdivision

A surface modeling and approximation technology, applied in image data processing, special data processing applications, instruments, etc.
CN101408991BInactive Publication Date: 2012-06-27SUN YAT SEN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SUN YAT SEN UNIV
Publication Date
2012-06-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a surface modeling method blended by interpolation type segmentation and approximation type segmentation and belongs to the field of computer aided design and manufacturing technology. Based on the internal relation between the existing interpolation type segmentation and approximation type segmentation, the method provides a method blended by an approximable Catmull-Clarksegmentation mode and an interpolation mode based on tensor product four-point interpolation, thus achieving the purpose that local interpolation segmentation curve, tessellated mesh and the tessellated mesh generated between the interpolation grids and the approximation grids can be obtained without needing to reversely obtain control vertex or to solve equations sets and solving the jump problems of 'expansion' or 'contraction' when multiresolution is used for expressing.
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Description

technical field

[0001] The invention relates to the technical field of computer-aided design and manufacturing, in particular to a curved surface modeling method combining interpolation subdivision and approximation subdivision. Background technique

[0002] Surface modeling is one of the most active and key subject branches in CAD and computer graphics. It is an important part of CAD system and an important research content in CAGD. Representation, design, display, and analysis of surfaces. Obviously, it is much easier to analyze or simulate a model of an object with a computer than to measure or manipulate an actual object. CAD / CAM, computer graphics, computer art, animation, simulation, computer vision, robotics and other fields all use curve and surface modeling as the basis. It is used everywhere in the geometric representation of three-dimensional shapes, from the fluid dynamic analysis of airplanes, automobiles, ships, and impellers, to the industrial modeling desig...

Claims

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