The Modeling And Simulating Of Three-dimensional Hair

The modeling and simulating of hair relates to computer graphics technology in all aspects and has very important research value. With the development of the computer application technology, its range of application will be wider and wider. It has played an important role in computer cartoon, electronic game, movie and TV program and so on.In the paper the modeling and simulating of three-dimensional hair was researched, and the following four aspects were included: Firstly, the head model data derived from Poser was read using dxf-format file and was processed to eliminate the duplication of vertexes storage. Then the head mesh model was divided into hair growth region and non-growth region by key points method and the mesh of hair growth region was simplified to reduce the vertexes and triangles, which reduced the amount of computation and enhanced the speed of simulation in the case of having no influence to the simulation effect. Secondly, The key hair's control points were generated by inverse operation of B-spline curve with the initial data generated by the cantilever beam model. Then a natural bend key hair curve determined by the control points was generated with deBoor-Cox arithmetic. Simultaneously, the key hair was used as ridge line, B-spline curve was used as section curves, and a hair cluster was generated by skinning. The B-spline modeling method was adopted to simulate the hair and made it easy to adjust and control the shape of the key hair and hair cluster. Thirdly, alpha map and color mixture were used to generate the user-defined hair texture and texture mapping was used to render the hair. Fourthly, used Visual C++ 6.0 as platform and used the OpenGL technology for programming to give the simulation results. The results demonstrate the proposed methods are effective.