PlanetEditor/grk/cw 6/shaders/shader_sun.frag

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#version 430 core
uniform vec3 lightPos;
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uniform vec3 lightColor;
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uniform vec3 cameraPos;
uniform bool atmosphereCheck;
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in vec3 vecNormal;
in vec3 worldPos;
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in vec2 vtc;
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out vec4 outColor;
uniform sampler2D colorTexture;
vec3 toneMapping(vec3 color)
{
float exposure = 0.06;
vec3 mapped = 1 - exp(-color * exposure);
return mapped;
}
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void main()
{
vec3 normal = normalize(vecNormal);
vec3 viewDir = normalize(cameraPos - worldPos);
vec3 textureColor = texture2D(colorTexture, vtc).rgb;
if (atmosphereCheck)
{
float atmosphereDot = dot(normal, viewDir);
vec3 atmosphereColor = vec3(1.0, 0.08, 0.02);
textureColor = mix(textureColor, atmosphereColor, pow(1 - atmosphereDot, 3));
}
vec3 distance = lightColor / pow(length(lightPos - worldPos), 2.0) * 25;
vec3 toneMappedColor = toneMapping(textureColor * distance);
//gamma correction
toneMappedColor = pow(toneMappedColor, vec3(1.0/2.2));
outColor = vec4(toneMappedColor * lightColor * 0.2f, 1.0);
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}