#version 410

in vec3 colV;
in vec3 modelPosV;
in vec3 worldPosV;
in vec3 viewPosV;
in vec3 norV;
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)
{
    vec3 nNor = normalize(norV);
    vec3 colVL = colV;
    
    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);
    
    float viewPosLength = length(viewPosV);
    float tinyDetailIntensity = mapRange(viewPosLength, 1.5, 0.0, 0, 0.0065);
    
    float tinyDetailChecker = (int(uvV.x * 200) + int(uvV.y * 200) & 1) != 0 ? -1.0 : 1.0;
    colVL += tinyDetailIntensity * vec3(tinyDetailChecker, tinyDetailChecker, tinyDetailChecker);
    
    fragColor = vec4(colVL,1);


    float br = 8.0;
    if(viewPosLength < br)
    {
        float bk = (br - viewPosLength) / (br * 10.0);
        fragColor.rgb += vec3(bk, bk, bk);
    }
    fragColor = clamp(fragColor, 0, 1);
    fragColor.rgb *= e;
}