In the system of cloth simulation, the process of cloth deformation together with the method of self-collisiondetection have great significance on how to simulate cloth deformation fast and realistic on computer. In this paper, wepresent a novel contour test based on the star-shaped property of a polygon, the central data structure for efficientexecution of the star-contour test. This paper describes and compares in detail directly accumulation method and globalstiffness matrix method. Experiment results showed that the effect simulated by the latter method is more close to realityeffect. Taking consider of efficiency, stability and convergence, this paper put forward an explicit -implicit combinedmethod which is suitable for our force models. At last, this paper puts forward a fabric deformation constraint methodwhich is suitable for linear FEM. This method is effective to restrain fabric excessive deformation behavior and achievedrealistic simulation result.
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