Generalized spring vibrator deformation emulating method with rigid core

A technology of spring vibrator and simulation method, which is applied in the field of computer simulation, and can solve the problems of not being able to express the overall deformation, not being able to maintain the initial shape, etc.

Inactive Publication Date: 2009-05-06
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0021] The technical problem to be solved by the present invention is to propose a generalized spring oscillator deformation simulation method with a rigid body kernel in view of the shortcomings

Method used

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  • Generalized spring vibrator deformation emulating method with rigid core
  • Generalized spring vibrator deformation emulating method with rigid core
  • Generalized spring vibrator deformation emulating method with rigid core

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Embodiment Construction

[0070] The purpose of this embodiment is to perform real-time dynamic deformation simulation of the elastic object described by the surface mesh model, using the surface mesh model in VRML format generated by 3DS Max software as input. The surface mesh model of an elastic object is expressed as Ω=(V, E), where V is the set of mesh vertices, and E is the set of mesh edges. Such as figure 1 As shown in the flow chart in , first construct the generalized spring oscillator model with rigid body core corresponding to the surface mesh model Ω, and then perform real-time dynamic deformation simulation of the generalized spring oscillator model with rigid body core according to the force information of the model. The specific steps are:

[0071] The first step is to construct a generalized spring oscillator model with a rigid core. The local schematic diagram of the generalized spring oscillator model with a rigid core is as follows: figure 2 As shown, the solid circles represent t...

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Abstract

The invention discloses a simulation method for the deformation of a broad-sense spring oscillator with a rigid body core, which aims at solving the problem that initial shapes can not be kept and integral deformation can not be showed in the deformation simulation of a surface grid model. The invention has the technical scheme that a broad-sense spring oscillator model with a rigid body core is firstly constructed, and the broad-sense spring oscillator model comprises particles and massless springs; the simulation deformation is then performed on the broad-sense spring oscillator model with a rigid body core in the visual display circulation of real-time deformation simulation, which comprises the four steps of the renewal of the rigid body core, the acquisition of internal force born by each particle in the model, the acquisition of combined force born by each particle in the model by combining with external force born by the model, and the drawing of the current shape of the model in a display by the motion state of particles in the model acquired by motion equations and by the particle position of each particle in the model in the current moment. The invention solves the problem that initial shapes can not be kept and integral deformation can not be showed in the deformation simulation of a surface grid model by adopting the prior method.

Description

technical field [0001] The invention relates to a method for simulating object deformation in the field of computer simulation, in particular to a method for simulating deformation of a generalized spring vibrator with a rigid body kernel. Background technique [0002] The physics-based deformation simulation method in computer graphics starts with the physical properties of the object and simulates the deformation of the object. It is mainly used in virtual reality, film, animation and other fields. Many models are used for physics-based deformation simulation, such as finite element method, mass-spring model, and simplified deformation model based on modal analysis. Compared with other models, the spring oscillator model is simple to implement and efficient to solve, so it is one of the first real-time deformation models applied to computer graphics. In 1987, K. Waters used the spring vibrator model to build the face in the paper "A Muscle Model for Animation Three-Dimens...

Claims

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Application Information

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IPC IPC(8): G06T17/40G06T19/20
Inventor 熊岳山王彦臻徐凯陈欣刘冬
Owner NAT UNIV OF DEFENSE TECH
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