#version 410

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

out vec4 fragColor;

vec3 eyePos = vec3(0,0,1.8);
uniform sampler2D texture1;

float mapRange(float x, float inLow, float inHigh, float outLow, float outHigh)
{
    x -= inLow;
    x *= (outHigh - outLow) / (inHigh - inLow);
    x += outLow;
    x = clamp(x, outLow, outHigh);
    return x;
}

vec3 mf(vec3 x)
{
    return x - floor(x);
}
void main (void)
{
    vec3 colVL = colV;
    if(!gl_FrontFacing)
    {
        //        colVL *= 0.98;
    }
    else
    {
        // do the plaid-ing
        float sqF = .25;
        float w = 0.5;
        
        float plaidShade = 0.96;
        
        vec3 t = mf(modelPosV / sqF);
        if(t.x < w || t.y < w)
            colVL *= plaidShade;
        if(t.y < w || t.z < w)
            colVL *= plaidShade;
        if(t.z < w || t.x < w)
            colVL *= plaidShade;
    }
    
    fragColor = vec4(colVL,1);
    
    vec2 co = gl_FragCoord.xy / 1024.0;
//        co.x += 0.1;
//        co.y += 0.02;

//    co += norV.xy * .001;
    vec3 norN = normalize(norV);
    vec2 nor2 = norV.xy + vec2(norV.z * .001, norV.z * .001);
    nor2 += sin(uvV * 3.0) * 10.0;
    vec2 coR = co + nor2.xy * 0.001;
    vec2 coG = co + nor2.xy * 0.00102;
    vec2 coB = co + nor2.xy * 0.00104;
    fragColor = vec4(texture(texture1, coR).r, texture(texture1, coG).g, texture(texture1, coB).b, 1)
            * vec4(0.83, 0.92, 0.95, 1.0);
    
    fragColor *= vec4(vec2(1,1) - 0.3 * uvV, 1, 1);
    fragColor *= vec4(1, .5, .8, 1);
    fragColor += vec4(.3, .2, .1, 0)/3.0;
    fragColor += vec4(uvV,0,1);
    
    {
        vec3 nNor = normalize(norV);
        vec3 eyePos3 = vec3(0.0, 0.0, eyePos);
        float spec = dot(normalize(eyePos3 - viewPosV), normalize(nNor));
        spec = pow(spec,100.0);
        fragColor += vec4(spec, spec, spec, 1.0);
    }

    if(false)
        if(gl_FrontFacing)
        {
            // front
            fragColor = mix(vec4(.3, .3, .3, 1), vec4(modelPosV, 1), 0.1);
        }
        else
        {
            // back
            fragColor = vec4(modelPosV,1);
        }

}