Meshless cloth-based simulation method

Abstract

The invention relates to a meshless cloth-based simulation method. The method comprises the following steps of: (a) parameterizing a given cloth model omega onto a middle surface lambda and determining a configuration before deformation and a reference configuration when calculation is started; (b) selecting a limited number of nodes in the parameterized middle surface lambda and determining a local subdomain omega s of each node; (c) calculating a shape function phi I in a definition domain of each node and calculating a derivative of the shape function; (d) determining Gauss integral points of all nodes, calculating a numerical integral and assembling a stiffness matrix; (e) assembling a node mass matrix and a viscosity matrix; and (f) determining the number of cycles according to the simulation time t and the set time step interval delta t to cycle the following steps for t / delta t times: calculating a rotated global stiffness matrix, implementing constraints on the global stiffness matrix, the node mass matrix and the viscosity matrix, obtaining and solving a system linear equation set according to time integral to obtain nodal displacement, implementing meshless collision detection and a response algorithm to modify the nodal displacement, and generating the displacement of all sampling points of each time step after re-sampling.

Description

technical field [0001] The invention relates to the field of cloth simulation technology, in particular to a mesh-free cloth discrete method and a mesh-free cloth collision detection method. Background technique [0002] Physics-based cloth simulation has been widely used in virtual reality, computer animation and computer-aided design of textile industry. The cloth animation model has gone through the stage from the pure geometry stage to the stage based on the mechanics model. Its main applied models include discrete particle spring model and continuous finite element and finite difference model. [0003] The mass spring model has been widely used in cloth simulation because of its simple model and easy realization. The mass spring is a simple deformable model, which belongs to the discrete model. As its name suggests, the mass spring model simply includes the mass points and the springs connected to them, which together form the corresponding network. It can also achi...

AI Technical Summary

Problems solved by technology

However, due to the fact that the technical time of the meshless model itself is not long, and the application technology is even less, there is no meshless cloth application in the relevant literature.

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