glslfaceforward

Faceforward. Return a vector pointing in the same direction as another. Declaration. float faceforward(float N, float I, float Nref) vec2 faceforward(vec2 N ...

faceforward orients a vector to point away from a surface as defined by its normal. If dot ( Nref , I ) < 0 faceforward returns N , otherwise it returns - N .

faceforward orients a vector to point away from a surface as defined by its normal. If dot ( Nref , I ) < 0 faceforward returns N , otherwise it returns - N .

faceforward orients a vector to point away from a surface as defined by its normal. If dot ( Nref , I ) < 0 faceforward returns N , otherwise it returns - N .

faceforward() 函数用于判断向量朝向，它可以通过比较入射向量与几何法线的方向，是否一致确定向量朝向。

attribute vec4 aPosition; · varying vec4 vColor; · float faceforward_emu(float N, float I, float Nref) ; return dot(Nref, I) < ...

2020年7月4日 — The faceforward function returns a vector that points in the same direction as a reference vector. The function has three input parameters of ...

faceforward,传入三个参数,a b c,假如b 和c 的点积小于0,返回a, 否则返回-a。reflect 函数,得到反射向量。refract 函数,得到折射向量,这两个函数属于光照方面的函数 ...