Complex free-form surface mesh generation method based on surface fitting and geodesic lines

A technology of surface fitting and grid division, which is applied in the directions of instruments, computing, image data processing, etc., can solve the problems of unsatisfactory grid division effect, and achieve good architectural aesthetics and smooth lines
CN107909650AInactive Publication Date: 2018-04-13ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2018-04-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a complex free-form surface grid division method based on surface fitting and geodesic lines, belonging to the field of architectural grid division. This method first proposes a surface-to-surface intersection method based on NURBS to obtain the N×M point cloud of the complex free-form surface, and uses the N×M point cloud as the control point to construct the NURBS surface, and then divides the pruned NURBS surface with a given number of boundaries Or divide with a given length, connect multiple boundary segment points to form a geodesic grid, and optimize and smooth to obtain the final complex free-form surface grid. The grid division method provided by the present invention can obtain grids with smooth lines and basically the same size. Compared with the multi-surface grid division method, surface fitting and geodesic grids can be used to obtain grids with smooth lines and uniform transition , has a good architectural aesthetic effect.
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Description

technical field

[0001] The invention belongs to the field of architectural grid division, and in particular relates to a complex free-form surface grid division method based on surface fitting and geodesic lines. Background technique

[0002] With the advancement of computer science and technology, the development of building construction technology and the improvement of architectural aesthetics, free-form surface structures appear more and more in people's field of vision with their beautiful shapes. "Free-form surface" refers to a surface that cannot be expressed by a single or several analytical functions, and can also be understood as those surfaces that are clearly different from traditional architectural shapes. Since the analytic surface has a certain periodicity or regularity, its grid division is more convenient. However, the irregularity of the free-form surface makes the traditional grid division difficult to apply to the free-form surface structure. Therefore,...

Claims

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