Method for implementing parallel moving hypersensitive Laplacian gridding edition

A grid and editing technique used in the field of translation-sensitive Laplacian grid editing

CN101276483BInactive Publication Date: 2012-04-18SUN YAT SEN UNIV
0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2012-04-18
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

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.
Need to check novelty before this filing date? Find Prior Art

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...

Examples

Embodiment Construction

[0058] The present invention will be further described below in conjunction with the accompanying drawings.

[0059] 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.

[0060] 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.

[0061] Transform the model. This step can be manipulated by user-defined ROI (Region of Interest, region of interest).

[0062] Then reconstruct the intermediate model M of the Cartesia...