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A Simulation Method of Angle Bending Model Based on Position Dynamics

A simulation method and dynamics technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as unsatisfactory simulation effects, limited scope of application, high calculation cost of dihedral bending models, etc., to reduce Computational cost, wide application range, and the effect of reducing redundancy and complexity

Inactive Publication Date: 2017-03-01
XIDIAN UNIV
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AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: The present invention makes improvements to the problems existing in the above-mentioned prior art, that is, the technical problem solved by the present invention is that the calculation cost of the dihedral angle bending model in the existing position-based dynamics method is large, and the simulation effect is not ideal enough. limitations

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  • A Simulation Method of Angle Bending Model Based on Position Dynamics
  • A Simulation Method of Angle Bending Model Based on Position Dynamics
  • A Simulation Method of Angle Bending Model Based on Position Dynamics

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Embodiment Construction

[0042] Below in conjunction with the accompanying drawings, the specific embodiments of the present invention will be described in detail.

[0043] Combined with the content of the invention in the specification, a deformable body mesh model composed of triangular faces is given to illustrate the principle in detail.

[0044] 1. According to the size of the deformable body, use 3ds Max (or Maya or Poser) to make a triangular mesh model file of the deformable body (such as a football) that needs to be simulated. The triangular mesh model file includes all The coordinate information of the nodes and the triangulation relationship between the nodes are read into the deformable body simulation system through OpenGL;

[0045] The deformable body simulation system includes:

[0046] An import module for reading deformable body mesh model file data;

[0047] An initialization module for setting simulation parameters of the deformable body mesh model;

[0048] A bend deformation mo...

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Abstract

The invention relates to a method of simulating angle bending model using position based dynamics. The method includes the steps of 1, making a grid model file of a deformable body to be simulated, and importing the grid model file into a deformable body simulation system; 2, defining variants of the grid model file of the deformable body; 3, according to Newton's second law and theorem of motion for particles, calculating a node prediction position p of a deformable body grid model after the deformable body grid model experiences an external force f<ext> for a time step Deltat; 4, building an angle bending model among nodes of the deformable body grid model; 5, outputting an image of the deformable body grid model at a node accurate position x, and using the node accurate position x as a node initial position of a next time step; 6, repeating the steps 3 to 5, and sequentially outputting images of frame of the deformable body grid model until simulation animation of bending deformation of the deformable body is obtained. The method has the advantages that the calculating process is easier, and calculation cost is reduced.

Description

technical field [0001] The invention belongs to the field of dynamic simulation based on physics in graphics, and in particular relates to a simulation method of an angle bending model based on positional dynamics. Background technique [0002] Much research has been done on how to model bending in computer graphics, especially in the field of cloth simulation. The traditional approach is to build springs between two spaced nodes in a regular grid to resist bending. PROVOT X. et al. used this bending spring model to simulate the bending behavior in "Deformation constraints in a mass-springmodel to describe rigid cloth behavior". They used a rectangular grid to simulate the cloth. The nodes in the grid are Mass, the spring mass model. Build a spring for two mass points in the vertical, horizontal and diagonal directions in the grid. The two mass points of the spring are separated by a node. This spring can be used to simulate the bending force of the cloth. According to Hoo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 王义峰吴晓婷王罡
Owner XIDIAN UNIV
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