tailieunhanh - A new self-collision detection method for cloth simulation

The paper describes and compares in detail, directly accumulation method and global stiffness matrix method. Taking efficiency, stability and convergence into consideration, the paper puts forward an explicit-implicit combined method which is suitable for force models. | Send Orders for Reprints to reprints abenthantscience. ae 386 The Open Electrical Electronic Engineering Journal 2015 9 386-392 Open Access A New Self-Collision Detection Method for Cloth Simulation Fengquan Zhang Jianfei Wan and Jiaojiao Guo College of Computer Science North China University of Technology Beijing 100141 China Abstract In the system of cloth simulation the process of cloth deformation and the method of self-collision detection have great significance for fast cloth deformation and realistic rendering. In this paper we first presented a novel contour test based on the star-shaped property of a polygon . the central data structure for efficient execution of the star-contour test. Then the paper describes and compares in detail directly accumulation method and global stiffness matrix method. Taking efficiency stability and convergence into consideration the paper puts forward an explicit-implicit combined method which is suitable for force models. At last a fabric deformation constraint method has been designed which is used for linear FEM. This method is effective to restrain the fabric from excessive deformation behavior and create realistic simulation results. Keywords Star-contour Self-collision detection Cloth deformation Finite Element Method FEM Numerical integration. 1. INTRODUCTION In the simulation of flexible body cloth not only collides with surrounding objects but also undergoes self-collision. If not appropriately responded self-collision would manifest as penetration on the cloth significantly reducing realistic feature. The detection and responding are both demanding and will shed immediate impact on simulation speed. Most algorithms available now enhance collisiondetection efficiency by reducing the number of detection elements. The detection can be handled by extraction of hierarchical structure. This type of algorithms lose their applicability in self-collision since no collided grid can be found between adjacent triangular mesh

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