一种三维头发的仿真方法

A Method of 3D Hair Simulation

头发的仿真一直是计算机图形学中最具挑战性的问题之一。为了得到真实感的头发图像,运用了基于NURBS曲面的头发建模方法,由悬臂梁模型在头部曲面附近生成关键头发曲线;调节控制点改变曲线形状;构造NURBS曲面四边形带代替头发簇;在头部模型对头发进行光照渲染,可以使用纹理方法映射颜色纹理和alpha纹理以生成真实头发。最后碰撞检测与响应手段增强了头发动态感。仿真结果表明,上述方法可以获得具有比较逼真效果的头发图像。

Simulation of hair has always been one of the most challenging tasks in computer graphics.In this paper, a technique for modeling and animating of hair with NURBS surface was used.The key hair is grown along the head surface by the cantilever beam mode.The curve shape is changed by adjusting control points.Then NURBS surface quad strips are structured instead of hair cluster.Hair along the head model is rendered with light,and texture mapping is used to map color texture and Alpha map for generating real hair.At last,collision detection and response enhance the dynamics sense of hair.The results show the method can get the hair with comparative realistic effect.