102 lines
2.9 KiB
GLSL
102 lines
2.9 KiB
GLSL
#version 330 core
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out vec3 fragHdrColor;
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in vec2 texCoord;
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uniform sampler2D gbuffer0_tex;
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uniform sampler2D gbuffer1_tex;
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uniform sampler2D gbuffer2_tex;
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uniform sampler2D depth_tex;
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uniform sampler2D ao_tex;
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uniform mat4 fg_ViewMatrixInverse;
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uniform mat4 fg_ProjectionMatrix;
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uniform vec3 fg_SunDirection;
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vec3 decodeNormal(vec2 enc);
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vec3 positionFromDepth(vec2 pos, float depth);
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float getShadowing(vec3 p, vec3 n, vec3 l, mat4 viewToClip);
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vec3 getF0Reflectance(vec3 baseColor, float metallic);
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vec3 evaluateLight(
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vec3 baseColor,
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float metallic,
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float roughness,
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float clearcoat,
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float clearcoatRoughness,
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vec3 f0,
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vec3 intensity,
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float occlusion,
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vec3 n,
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vec3 l,
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vec3 v,
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float NdotL,
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float NdotV);
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vec3 evaluateIBL(
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vec3 baseColor,
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float metallic,
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float roughness,
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vec3 f0,
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float occlusion,
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vec3 nWorldSpace,
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float NdotV,
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vec3 reflected);
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vec3 addAerialPerspective(vec3 color, vec2 coord, float depth);
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vec3 getSunIntensity();
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void main()
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{
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float depth = texture(depth_tex, texCoord).r;
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vec4 gbuffer0 = texture(gbuffer0_tex, texCoord);
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vec2 gbuffer1 = texture(gbuffer1_tex, texCoord).rg;
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vec4 gbuffer2 = texture(gbuffer2_tex, texCoord);
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float ao = texture(ao_tex, texCoord).r;
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vec3 pos = positionFromDepth(texCoord, depth);
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vec3 v = normalize(-pos);
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vec3 n = decodeNormal(gbuffer1);
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vec3 l = fg_SunDirection;
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float NdotL = dot(n, l);
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float NdotV = clamp(abs(dot(n, v)), 0.001, 1.0);
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vec3 baseColor = gbuffer0.rgb;
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float cavity = gbuffer0.a;
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float metallic = gbuffer2.r;
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float roughness = gbuffer2.g;
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float clearcoat = gbuffer2.b;
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float clearcoatRoughness = gbuffer2.a;
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vec3 f0 = getF0Reflectance(baseColor, metallic);
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vec3 sunIlluminance = getSunIntensity() * clamp(NdotL, 0.0, 1.0);
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float shadowFactor = getShadowing(pos, n, l, fg_ProjectionMatrix);
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vec3 color = evaluateLight(baseColor,
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metallic,
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roughness,
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clearcoat,
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clearcoatRoughness,
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f0,
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sunIlluminance,
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shadowFactor,
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n, l, v,
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NdotL, NdotV);
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float ambientOcclusion = ao * cavity;
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vec3 worldNormal = (fg_ViewMatrixInverse * vec4(n, 0.0)).xyz;
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vec3 worldReflected = (fg_ViewMatrixInverse * vec4(reflect(-v, n), 0.0)).xyz;
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color += evaluateIBL(baseColor,
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metallic,
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roughness,
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f0,
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ambientOcclusion,
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worldNormal,
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NdotV,
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worldNormal);
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color = addAerialPerspective(color, texCoord, length(pos));
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fragHdrColor = color;
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}
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