Research On The Algorithm Of Generating Realistic Cloth

To synthesize realistic cloth by computer has been a problem of interest to the computer graphics community for more than a decade. It is of extensive areas of applications such as in virtual reality, in computer art, in CAD/CAM system for gannent design, in e-business and so on. In this paper, we present a set of algorithm of modeling cloth and synthesize realistic cloth, which based on the systematical analysis for cloth. We model cloth as a collection of particles that conceptually represents the crossing points of warp and weft threads in a plain weave. Based on this model, we decompose the deformation of cloth into elastic deformation, bend and shear, and deduce energy functions of the three kinds of deformation by physical rules. But unfortunately, Cloth strongly resists elastic deformations while being comparatively permissive in allowing bending or shearing. This results in an 搃ll? system. To settle this question, we adopt preconditioned conjugate gradient method, and integrate the motion equation of cloth by solving a set of linear equations. This method makes the simulation more quickly. In this paper, we propose a fast collision detection and avoidance algorithm for self-collision and collision between cloth and rigid object in simulating the dynamic behavior of deformable cloth. In detection phase, we combine bounding box and hierarchical structure model to cull out the majority of detection. When we detect the collision between cloth and rigid object, we reduce many collision types to vertex/plane collision. So the problem of solving linear equation is simplified as that of algebra operation. When we detect the self-collision for cloth, we detect the collision bounding boxes of cloth triangles instead of cloth triangles themselves. Therefor we can detect self-collision for cloth by simple relation calculation. In avoidance phase, we combine avoidance into numerical integration by using preconditioned conjugate gradient method. This speeds up the whole calculation. In the end, we develop an algorithm for generating realistic fabric textures, set up a human body model, design a simple garment design software, and generate a simple cloth.