indra/newview/app_settings/shaders/class1/environment/decodeNorm.glsl


1
2
3
4
5
6
7
8
9
10
11

vec3 decode_normal (vec2 enc)
{
    vec2 fenc = enc*4-2;
    float f = dot(fenc,fenc);
    float g = sqrt(1-f/4);
    vec3 n;
    n.xy = fenc*g;
    n.z = 1-f/2;
    return n;
}