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3D grid deforming method based on surface area keeping

A technology of mesh deformation and surface area, applied in 3D modeling, image data processing, instruments, etc., can solve problems such as deformation of 3D models of soft objects, and achieve the effect of improving realism

Inactive Publication Date: 2012-03-14
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0007] The 3D grid deformation method based on surface area preservation proposed by the present invention provides an effective, fast and realistic deformation method for solving the deformation problem of the 3D model of soft objects

Method used

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  • 3D grid deforming method based on surface area keeping
  • 3D grid deforming method based on surface area keeping
  • 3D grid deforming method based on surface area keeping

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Embodiment Construction

[0039] Below in conjunction with accompanying drawing and embodiment the present invention will be further described, and concrete process is as follows:

[0040] Step 1: Initialization.

[0041] 1) Read the 3D geometric model.

[0042]2) Define the deformation region control curve. In order to simplify the calculation, the ordinary arc curve is used as the control line of the basic bending deformation, which is defined by the following two parameters: the plane where the control curve is located is called the deformation plane, and the angle between it and the XOZ plane is called the deformation direction angle. figure 2 (Left) is the vertical cross-section of the base grid with circular arcs as control curves, P 1 P 0 P 2 -Q 1 Q 0 Q 2 is the grid in the straightened state, P 1 P 0 P 2 -Q' 1 Q' 0 Q' 2 is the mesh in the curved state, P 0 Q 0 and P 0 Q' 0 are the control lines in the two states respectively, ∠P 0 Q 0 R 0 That is, α is the deformation rotat...

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Abstract

The invention relates to a three-dimensional grid deformation method based on surface area maintenance and provides an effective, fast and vivid deformation method for three-dimensional grid objects aiming at the deformation problem of a three-dimensional model of a soft object, which belongs to the field of computer application, in particular to the technical field of computer graphics and virtual reality. In the method, various forms of deformations are seen to be respectively composed of basic bending deformations, the local regions of the basic bending deformations are independently calculated, and a global deformation result is obtained through the joint of the regions; deformation regions are divided according to control curves, and a basic grid deformation algorithm irrelevant to an original grid model is proposed through separating and synthesizing basic deformation grids and detail grids; damped oscillation curves are used to simulate surface wrinkles at the bent and deformedinner sides of the soft object, and the vertex column length of a basic model is maintained to realize the surface area maintenance and improve the third dimension of grid deformation so as to realize the deformation of a three-dimensional grid model.

Description

technical field [0001] The invention relates to computer graphics and virtual reality technology, in particular to an efficient and realistic 3D grid object deformation method, which belongs to the field of computer applications. technical background [0002] 3D geometric model deformation technology is one of the important technologies in computer graphics, which is widely used in the fields of character animation, interactive modeling, force simulation and medical surgery. With the development of scanning technology and data visualization technology, the acquisition methods and performance capabilities of models are getting stronger and stronger, and the application of 3D mesh deformation has also been promoted. A good 3D model deformation method usually pursues three goals: simple user operation, fast deformation calculation and reasonable and realistic deformation results. Scholars at home and abroad have done a lot of research on this. [0003] In the surface model of ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/00
Inventor 黄天羽陈红倩李凤霞张艳陈宇峰李立杰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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