unity3d shader 的若干

1.

struct SurfaceOutput {  
    half3 Albedo;     //像素的颜色
    half3 Normal;     //像素的法向值
    half3 Emission;   //像素的发散颜色
    half Specular;    //像素的镜面高光
    half Gloss;       //像素的发光强度
    half Alpha;       //像素的透明度
};