#version 410

in vec3 colV;
in vec3 modelPosV;
in vec3 worldPosV;
in vec3 viewPosV;
in vec2 uvV;

out vec4 fragColor;

vec3 mf(vec3 x)
{
    return x - floor(x);
}

float mapRange(float x, float minIn, float maxIn, float minOut, float maxOut)
{
    x -= minIn;
    x = x * (maxOut - minOut) / (maxIn - minIn);
    x += minOut;
    x = clamp(x, minOut, maxOut);
    return x;
}

void main (void)
{
    vec2 uv = uvV;
    if(uv.x > 0.5)
        uv.x = 1.0 - uv.x;
    if(uv.y > 0.5)
        uv.y = 1.0 - uv.y;
    
    float e = min(uv.x, uv.y);
    float edgeLimit = 0.1;
    e = mapRange(e, 0.0, edgeLimit, 0.9, 1.0);
    
    vec3 shadowey3 = worldPosV;
    shadowey3 = modelPosV / 3;
    float r = cos(shadowey3.x) + cos(shadowey3.y) + cos(shadowey3.z);
    r = mapRange(r, -3, 3, 0.8, 1.0);
    
    fragColor = vec4(colV,1);
    fragColor.rgb *= e * r;
}