说明：  HLSL头发着色器。使用几何体着色器渲染3D头发束。许多这样的线可以廉价地渲染来模拟人类头发的头部。漫反射着色版本。
(HLSL hair shader. Renders a 3D strand of hair using a geometry shader. Many such strands can be rendered inexpensively to model a head of human hair. Diffuse shaded version.)