The Research And Realization Of Three-dimensional Virtual Garment Stitching And Cloth Simulation

In recent years, cloth simulation has become a research topic that interests many researchers. Cloth simulation is an important part of computer animation, garment CAD and virtual try-on system. The virtual try-on is a new technology in electronic commerce. In order to make the customers to choose and try on clothes conveniently and quickly, and moreover, realistically and effectively, the appearance of virtual try-on technology is a necessity. The virtual try-on system provides a real-time interactive platform, which allows users to choose clothes and try them on the virtual body model.Nowadays, the technology of three-dimensional virtual try-on is going mature both at home and abroad. There has been a series of research results on cloth-modeling, cloth-stitching and collision-detection. But the traditional collision-detection algorithm may result in endless loop, and the time complexity is high.Based on the research of current three-dimensional virtual try-on technology, some improvements are made in this dissertation. A new method to set stitching information is proposed. An improved way to construct bounding-boxes is introduced, which avoids the endless loop. What's more, the traditional collision-detection algorithm is improved to reduce the time spent in collision-detection phase.In this dissertation, firstly, a spring-mass model is established for the cloth after it is dispersed, and then the force of the cloth is simulated based on the analysis of the inner force and outer force the cloth suffered. Secondly, the two-dimensional fabric is transformed into three-dimensional clothes through the virtual stitching technology. Thirdly, the AABB bounding-box trees for cloth and body are established, and the AABB bounding-box detection algorithm is used to detect and deal with the collision between fabrics and human body appeared in the process of cloth-stitching. Fourthly, the texture effect of the cloth is simulated through the mapping between the fabric and bitmap. Finally, the dynamic effect of the cloth is simulated after studying the way that how the wind force affect the cloth. So far, the dressing effect of routine clothes can be simulated, and the dynamic effect under wind is realistic.