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Half-edge data structure-based T-mesh local refinement realizing method

A technology of half-edge data structure and implementation method, applied in image data processing, 3D modeling, instruments, etc., to achieve the effect of high computational efficiency

Inactive Publication Date: 2017-01-04
BEIHANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This method can effectively solve the local refinement problem of T-mesh in the triangular mesh surface using double-odd T-splines fitting topology equivalent to a disc

Method used

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  • Half-edge data structure-based T-mesh local refinement realizing method
  • Half-edge data structure-based T-mesh local refinement realizing method
  • Half-edge data structure-based T-mesh local refinement realizing method

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Embodiment Construction

[0082] In order to make the technical solution of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings and specific examples.

[0083] A kind of T-mesh partial thinning realization method based on the half edge data structure of the present invention, such as figure 1 As shown, its implementation steps are as follows:

[0084] Step 1: Firstly, according to the connection mode of the control vertices of the current T-splines, the T-mesh based on the half-edge data structure of the current T-splines is constructed.

[0085] The second step is to determine all the patches that need to be locally refined in the current T-mesh.

[0086] Step 3: Add new edge points in the patch that needs local refinement, and mark the points related to the patch segmentation.

[0087] Step 4: Divide the current T-mesh in the current T-mesh into two according to the points related to the facet segmentation, and determine t...

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Abstract

The invention provides a half-edge data structure-based T-mesh local refinement realizing method, which comprises the following steps: 1, establishing half-edge data structure-based T-mesh of the current T-splines; 2, determining all the surface patches, which need to be subjected to local refinement, in the current T-mesh; 3, increasing new edge points in the surface patches which need local refinement, and marking points related to segmentation of the surface patches; 4, determining peaks which the segmented surface patches and the non-segmented surface patches contain; and 5, reestablishing the half-edge data structure-based T-mesh which is subjected to local refinement. The half-edge data structure-based T-mesh local refinement realizing method realizes self-adaptive local refinement of the T-mesh of the T-splines, is absolutely necessary in actual application of triangular mesh curved surface fitting, T-splines based isogeometric analysis and the like, and is conducive to pushing further application of the T-splines in the fields of computer aided design, computer aided analysis and the like.

Description

technical field [0001] The invention provides a method for implementing T-mesh local refinement based on a half-edge data structure, which relates to a method for realizing T-mesh local refinement of T-spline surfaces (T-splines), in particular to double-odd numbers The T-mesh local refinement method of T-splines is implemented when T-splines are topologically equivalent to a triangular mesh surface of a disc. The T-spline surface (ie T-splines) referred to in the present invention is a surface modeling method proposed by Thomas W. Sederberg et al. in the document T-splines and T-NURCCs in 2003. In addition, the T-mesh referred to in the present invention refers to the T-splines control grid composed of T-splines control vertices, and refers to the parameter domain grid composed of nodes on the T-splines parameter domain. The above two are Topologically isomorphic. The invention belongs to the technical fields of computer graphics and surface modeling. Background technique...

Claims

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Application Information

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IPC IPC(8): G06T17/30
CPCG06T17/30
Inventor 陈甜甜陈鲁王伟赵罡
Owner BEIHANG UNIV
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