Particle computer dynamic simulation method for 3D garment

Abstract

The invention discloses a particle computer dynamic simulation method for a 3D garment, which realizes a fast and robust physical simulation effect through applying a hierarchical modeling and particle simulation method to a physical model of clothing and a human body. The method mainly comprises the steps of parameterized human body modeling, building a particle human model, building a hierarchical clothing model, and performing particle-based fast collision detection algorithm. The particle computer dynamic simulation method for the 3D garment provided by the invention improves on the basis of a position based simulation method, proposes to use a mesh reconstruction technology, standardizes the clothing mesh own form, and increases the robustness of a computing process; particles of different sizes and collision properties are used to realize a fast and robust discrete time point collision detection and processing method; a multi-level particle method is used, and a method of refining a surface and densely paving particles is introduced to prevent a phenomenon of passing through, thus a simulation effect of multi-layer clothing can be realized more truly; and a constraint solving method with priority is used, and the simulation effect can be realized by using fewer iterations.

Description

Technical field [0001] The invention relates to the technical field of computer graphics, and in particular to a method for implementing clothing simulation in the technical field of computer simulation. Background technique [0002] Virtual fitting is a hot issue in the field of virtual reality (Virtual Reality, VR). It combines virtual clothes calculated by a computer with actual images or videos of the human body, in order to realistically present the effect of human wearing clothes. Virtual fitting involves technologies related to many disciplines such as computer graphics and material physics, such as image recognition, human body modeling, and clothing simulation. And related issues such as virtual fitting have broad application prospects, such as movie CG special effects, real-time 3D games. Among these applications, online clothing shopping is undoubtedly the most important field of virtual fitting applications. Through virtual fitting, people can choose their own cloth...

AI Technical Summary

Problems solved by technology

But first of all, a large amount of state data of the material to be simulated in various situations is required. These data need to be accurately measured, and the simulation method is used to simulate the clothes under these data. In actual situations, the data is difficult to obtain; the physics-based network The grid discretization simulation method actually models the motion through physical parameters, and can obtain very high accuracy without considering real-time performance. However, due to the influence of grid discretization and time discretization, the pursuit of real-time methods usually has The physical model has been greatly simplified, which has a great impact on the convergence and divergence of system operation; the position-based simulation method is a fast approximate simulation method, which is equivalent to a traditional physical simulation method with implicit motion equations , it crosses the velocity layer and directly calculates the position, which ensures the convergence of the system. However, because its solution does not consider the velocity and time step, it omits the solution of force and motion equations, and cannot be used for various physics The parameters are accurately described, so the accuracy of the simulation is lacking

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