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#version 330 core
in vec2 UV;
in vec3 normIn;
in vec3 camDirIn;
in vec3 lightDirIn;
out vec3 color;
uniform sampler2D rendertex;
uniform sampler2D scanlinestex;
const float Tuning_Overscan = 1.08;
const float Tuning_Dimming = 0.0;
const float Tuning_Satur = 1.0;
const float Tuning_ReflScalar = 0.3;
const float Tuning_Barrel = 0; //0.12;
const float Tuning_Scanline_Brightness = 0.45;
const float Tuning_Scanline_Opacity = 0.5;
const float Tuning_Diff_Brightness = 0.75;
const float Tuning_Spec_Brightness = 0.35;
const float Tuning_Spec_Power = 50.0;
const float Tuning_Fres_Brightness = 1.0;
uniform vec2 resolution;
vec4 sampleCRT(vec2 uv)
{
vec2 CRTMask_Scale = resolution / vec2(6.0, 5.0);
vec2 scanuv = uv * CRTMask_Scale;
vec3 scantex = texture(scanlinestex, scanuv).rgb;
scantex += Tuning_Scanline_Brightness;
scantex = mix(vec3(1,1,1), scantex, Tuning_Scanline_Opacity);
vec2 overscanuv = (uv * Tuning_Overscan) - ((Tuning_Overscan - 1.0f) * 0.5f);
overscanuv = overscanuv - vec2(0.5, 0.5);
float rsq = (overscanuv.x*overscanuv.x) + (overscanuv.y*overscanuv.y);
overscanuv = overscanuv + (overscanuv * (Tuning_Barrel * rsq)) + vec2(0.5,0.5);
vec3 comptex = texture(rendertex, overscanuv).rgb;
vec4 emissive = vec4(comptex * scantex, 1);
float desat = dot(vec4(0.299, 0.587, 0.114, 0.0), emissive);
emissive = mix(vec4(desat, desat, desat, 1), emissive, Tuning_Satur);
return emissive;
}
void main()
{
vec3 norm = normalize(normIn);
vec3 camDir = normalize(camDirIn);
vec3 lightDir = normalize(lightDirIn);
float diffuse = clamp(dot(norm, lightDir), 0.0f, 1.0f);
vec4 colordiff = vec4(0.175, 0.15, 0.2, 1) * diffuse * Tuning_Diff_Brightness;
vec3 halfVec = normalize(lightDir + camDir);
float spec = clamp(dot(norm, halfVec), 0.0f, 1.0f);
spec = pow(spec, Tuning_Spec_Power);
vec4 colorspec = vec4(0.25, 0.25, 0.25, 1) * spec * Tuning_Spec_Brightness;
float fres = 1.0f - dot(camDir, norm);
fres = (fres*fres) * Tuning_Fres_Brightness;
vec4 colorfres = vec4(0.45, 0.4, 0.5, 1) * fres;
vec4 emissive = sampleCRT(UV);
vec4 nearfinal = colorfres + colordiff + colorspec + emissive;
//vec4 final = nearfinal * mix(vec4(1,1,1,1), vec4(0,0,0, 0), Tuning_Dimming);
color = nearfinal.rgb;
}
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