关键词: 快速渲染, 悬梁臂模型, Phong明暗处理, alpha测试, 多种发型

Abstract: Due to the huge amount of hair, it is very difficult for real-time rendering of virtual human hair, let alone hairstyle designing. An improved method based on hair strips is put forward, by which a variety of hairstyles can be realized. To the NURBS surface model, when positioning of the control points, the cantilever beam is imported to show hair natural state of prolapse. To calculate the light effect accurately, a kind of rapid and accurate method to calculate the unit reflection ray vector in Phong shading model is put forward, and the hair texture and Phong shading interaction is fully considered. In addition, this paper puts forward a new method to gain various hairstyles in texture level, that is, through modifying the alpha texture and the texture coordinates using disturbance function, to realize different length and bending styles. The experimental results show that, the new method can realize high fidelity virtual human hair simulation, and support a variety of hairstyles.

Key words: fast rendering, cantilever beam model, Phong shading, alpha test, various hairstyle