#version 410

in vec3 colV;
in vec3 modelPosV;
in vec3 worldPosV;
in vec3 viewPosV;
in vec3 norV;
in vec2 uvV;
in vec4 miscV; // refraction tweaks

out vec4 fragColor;

vec3 eyePos = vec3(0,0,1.8);
uniform sampler2D texture1;
uniform vec2 meScreenSize;

void main (void)
{
    vec2 co = gl_FragCoord.xy / vec2(meScreenSize.x, meScreenSize.y);

    vec3 norN = normalize(norV);
    vec2 nor2 = norV.xy + vec2(norV.z * .001, norV.z * .001);
    nor2 += sin(uvV * (3.0 + miscV[1]) * 10.0) * (1 + miscV[2]);

    co += nor2 * 0.001;
    fragColor = vec4(texture(texture1, co).rgb, 1.0) * vec4(0.83, 0.92, 0.95, 1.0);
    fragColor += vec4(uvV,0,1) * (1.0  - miscV[0]); // add dichroic red/green tint
    
    {
        vec3 nNor = normalize(norV + vec3(nor2,0));
        vec3 eyePos3 = vec3(0.0, 0.0, eyePos);
        float spec = dot(normalize(eyePos3 - viewPosV), normalize(nNor));
        spec = abs(spec);
        spec = pow(spec,100.0);
        if(spec < 0) spec = -spec; // ATI is lenient, NVidia requires.
        fragColor += vec4(spec, spec, spec, 1.0);
    }
}