58 lines
2.3 KiB
GLSL
58 lines
2.3 KiB
GLSL
#version 450
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#include "../compiled.inc"
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// Include functions for gbuffer operations (packFloat2() etc.)
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#include "../std/gbuffer.glsl"
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// World-space normal from the vertex shader stage
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in vec3 wnormal;
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/*
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The G-Buffer output. Deferred rendering uses the following render target layout:
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| Index | Needs #define || R | G | B | A |
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+===================+=================++==============+==============+=================+====================+
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| GBUF_IDX_0 | || normal (XY) | roughness | metallic/matID |
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+-------------------+-----------------++--------------+--------------+-----------------+--------------------+
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| GBUF_IDX_1 | || base color (RGB) | occlusion/specular |
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+-------------------+-----------------++--------------+--------------+-----------------+--------------------+
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| GBUF_IDX_2 | _gbuffer2 || velocity (XY) | ignore radiance | unused |
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+-------------------+-----------------++--------------+--------------+-----------------+--------------------+
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| GBUF_IDX_EMISSION | _EmissionShaded || emission color (RGB) | unused |
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+-------------------+-----------------++--------------+--------------+-----------------+--------------------+
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The indices as well as the GBUF_SIZE define are defined in "compiled.inc".
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*/
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out vec4 fragColor[GBUF_SIZE];
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void main() {
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// Pack normals into 2 components to fit into the gbuffer
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vec3 n = normalize(wnormal);
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n /= (abs(n.x) + abs(n.y) + abs(n.z));
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n.xy = n.z >= 0.0 ? n.xy : octahedronWrap(n.xy);
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// Define PBR material values
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vec3 basecol = vec3(1.0);
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float roughness = 0.0;
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float metallic = 0.0;
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float occlusion = 1.0;
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float specular = 1.0;
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uint materialId = 0;
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vec3 emissionCol = vec3(0.0);
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float ior = 1.450;
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float opacity = 1.0;
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// Store in gbuffer (see layout table above)
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fragColor[GBUF_IDX_0] = vec4(n.xy, roughness, packFloatInt16(metallic, materialId));
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fragColor[GBUF_IDX_1] = vec4(basecol.rgb, packFloat2(occlusion, specular));
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#ifdef _EmissionShaded
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fragColor[GBUF_IDX_EMISSION] = vec4(emissionCol, 0.0);
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#endif
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#ifdef _SSRefraction
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fragColor[GBUF_IDX_REFRACTION] = vec4(ior, opacity, 0.0, 0.0);
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#endif
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}
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