Non-stretch cloth simulation oriented mass-spring model constraint method

Abstract

The invention provides a non-stretch cloth simulation oriented mass-spring model constraint method. By adopting the method, deformation repair of a structural spring in a mass-spring model can be realized by correcting the mass point position of the mass-spring model. The mass-spring model constraint method specifically comprises the following steps: in order to accelerate the convergence speed of constraint implementation, giving an optimal relaxation factor based on a topological structure and deformation of the structural spring and the like in the mass-spring model; according to deformation of a single structural spring, calculating components of position correction quantity of mass points at two endpoints along the spring direction; superposing the components of the position correction quantity of the same mass point; multiplying the superposition sum by the optimal relaxation factor, and taking the result as the position correction quantity of the mass point; and finally updating the mass point position so as to realize deformation repair of the structural spring. The mass-spring model constraint method has the beneficial effects that conservation between linear momentum andangular momentum of cloth can be ensured and the non-stretch cloth can be efficiently and stably simulated during the constraint implementation process, thus the method can be widely applied to non-stretch cloth simulation in virtual reality systems for film and video production, digital entertainment and other purposes.

Description

technical field [0001] The invention belongs to the field of computer simulation and virtual reality, in particular to a mass point-spring model constraint method for non-stretch cloth simulation. Background technique [0002] The method of using computer graphics and virtual reality technology to simulate the natural and real human motion process is called human motion simulation, which specifically includes the establishment of a computational model of the human body and its accessories, and the simulation of the natural and real physical motion process of a virtual human under given constraints. And in the computer-generated virtual environment, the motion process is realistically presented in a three-dimensional graphic manner. However, 80% of the natural real human body surface is covered by cloth, so realistic simulation of cloth plays a key role in realistic human motion simulation. [0003] Cloth is a web-like weave of natural or man-made fibers. In terms of mechan...

AI Technical Summary

Problems solved by technology

The constraint method based on implicit integral will bring additional damping force, making the cloth look like rubber; the constraint method based on Gauss-Seidel iteration will introduce additional linear momentum and angular momentum during the constraint implementation process, and the simulated cloth will be affected by Jitter phenomenon due to non-conservation of momentum

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