Method for implementing parallel moving hypersensitive Laplacian gridding edition

A mesh and editing technology, applied in the field of translation-sensitive Laplacian mesh editing, can solve the problems that the Laplacian mesh editing method is not translation-sensitive and maintains the geometric details of local surfaces.

Inactive Publication Date: 2008-10-01
SUN YAT SEN UNIV
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Problems solved by technology

[0009]The purpose of this invention is to solve the problem that the Laplacian grid editing method does not have translation sensitivity, so that the Laplacian coordinates can achieve translation-sensitive deformation effects, and maintain the geometric details of the local surface

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  • Method for implementing parallel moving hypersensitive Laplacian gridding edition
  • Method for implementing parallel moving hypersensitive Laplacian gridding edition
  • Method for implementing parallel moving hypersensitive Laplacian gridding edition

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Embodiment Construction

[0057] The present invention will be further described below in conjunction with the accompanying drawings.

[0058] The schematic diagram of the execution steps of the method of the present invention is as attached figure 1 shown. Input the 3D mesh model M through the terminal 0 , the model can be acquired through a 3D scanner or built using modeling tools (such as Maya, 3ds max, etc.). Define M 0 = (V, E, F) has |V| vertices. Among them, V, E, and F represent the collection of vertices, edges, and faces, respectively.

[0059] Build the Laplacian coordinates of the model. First, the Laplacian operator needs to be constructed. Uniform weights can be used, or different weights can be set according to different grids, such as the weight of cotangent or the area of ​​triangular grids.

[0060] Transform the model. This step can be manipulated by user-defined ROI (Region of Interest, region of interest).

[0061] Then reconstruct the intermediate model M of the Cartesian...

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Abstract

The invention provides a Laplacian grid editting method for realizing translation sensitivity. The method is usually used for model editting in computer cartoons and industrial modeling, but a Laplacian coordinate have no translation sensitivity, thereby geometrical detail characters of the model can not be held well. Thus, the invention proposes a method for rotating the Laplacian coordinate by a vertex normal, which comprises re-building a middle model based on the original Laplacian coordinate, calculating the vertex normal of the model, and rotating the original Laplacian coordinate to a parallel direction of the vertex normal, and rebuilding the model to obtain the result. According to the method of the invention, the Laplacian coordinate realizes the deformation effect of translation sensitivity, the vertex normal is automatically calculated, fussy Laplacian vector estimation is avoided, and the geometrical detail characters of the model can be held well.

Description

technical field [0001] The invention belongs to the technical field of geometry modeling, in particular to a Laplacian grid editing method realizing translation sensitivity. Background technique [0002] With the advancement of computer animation and industrial modeling, model editing technology has developed rapidly. Many scholars have proposed various mesh editing technologies, such as free deformation technology, multi-resolution mesh editing technology, and methods based on geometric differential attributes. new model. [0003] Since the 1980s, there have been two major technological breakthroughs in the field of 3D model editing. The first breakthrough occurred in the 1980s, called free deformation technology, to edit the model by means of manipulating the proxy model. The second breakthrough occurred in the 1990s, called multi-resolution editing technology, to manipulate simplified models as a means of mesh editing. These two technological breakthroughs have provid...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/20G06T17/00G06T15/00G06T17/30
Inventor 罗笑南叶梦
Owner SUN YAT SEN UNIV
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