Three.js 灯光模型的计算如何在着色器程序中工作？
我正在努力阅读本教程： 但我无法跟进。基本上，代码通过使用直接在GPU上运行的着色器来创建平行光。代码如下：Three.js 灯光模型的计算如何在着色器程序中工作？,three.js,glsl,webgl,lighting,light,Three.js,Glsl,Webgl,Lighting,Light,我正在努力阅读本教程： 但我无法跟进。基本上，代码通过使用直接在GPU上运行的着色器来创建平行光。代码如下： // same name and type as VS varying vec3 vNormal; void main() { // calc the dot product and clamp // 0 -> 1 rather than -1 -> 1 vec3 light = vec3(0.5,0.2,1.0); // ensure
// same name and type as VS
varying vec3 vNormal;
void main() {
// calc the dot product and clamp
// 0 -> 1 rather than -1 -> 1
vec3 light = vec3(0.5,0.2,1.0);
// ensure it's normalized
light = normalize(light);
// calculate the dot product of
// the light to the vertex normal
float dProd = max(0.0, dot(vNormal, light));
// feed into our frag colour
gl_FragColor = vec4(dProd, dProd, dProd, 1.0);
}
float dProd = max(0.0, dot(vNormal, light));
f_Lambertian = max( 0.0, dot( N, L )
dot( A, B ) == length( A ) * length( B ) * cos( angle_A_B )
uA = normalize( A )
uB = normalize( B )
cos( angle_A_B ) == dot( uA, uB )