257 lines
6.3 KiB
GLSL
257 lines
6.3 KiB
GLSL
#version 450
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#include "compiled.inc"
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#include "std/brdf.glsl"
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#include "std/math.glsl"
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#ifdef _LightIES
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#include "std/ies.glsl"
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#endif
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#ifdef _VoxelGIDirect
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#include "std/conetrace.glsl"
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#endif
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#ifdef _LTC
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#include "std/ltc.glsl"
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#endif
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#ifndef _NoShadows
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#include "std/shadows.glsl"
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#endif
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#ifdef _SSS
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#include "std/sss.glsl"
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#endif
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#ifdef _SSRS
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#include "std/ssrs.glsl"
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#endif
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#include "std/gbuffer.glsl"
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#ifdef _VoxelGIDirect
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uniform sampler3D voxels;
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#endif
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#ifdef _VoxelGICam
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uniform vec3 eyeSnap;
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#endif
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// uniform sampler2D gbufferD;
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uniform sampler2D gbuffer0;
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uniform sampler2D gbuffer1;
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#ifdef _gbuffer2direct
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uniform sampler2D gbuffer2;
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#endif
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// TODO: separate shaders
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#ifndef _NoShadows
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#ifdef _SoftShadows
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uniform sampler2D svisibility;
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#else
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uniform sampler2D shadowMap;
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uniform samplerCube shadowMapCube;
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#endif
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#endif
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#ifdef _LightIES
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//!uniform sampler2D texIES;
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#endif
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#ifdef _SMSizeUniform
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uniform vec2 smSizeUniform;
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#endif
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#ifdef _SSS
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vec2 lightPlane;
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#endif
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uniform mat4 invVP;
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uniform mat4 LWVP;
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uniform vec3 lightColor;
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uniform vec3 lightDir;
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uniform vec3 lightPos;
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uniform vec2 lightProj;
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uniform int lightType;
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uniform int lightShadow;
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uniform float shadowsBias;
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uniform vec2 spotlightData;
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#ifdef _LTC
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uniform vec3 lightArea0;
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uniform vec3 lightArea1;
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uniform vec3 lightArea2;
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uniform vec3 lightArea3;
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uniform sampler2D sltcMat;
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uniform sampler2D sltcMag;
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#endif
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uniform vec3 eye;
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#ifdef _SSRS
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//!uniform mat4 VP;
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#endif
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#ifdef _LightColTex
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uniform sampler2D texlightcolor;
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#endif
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in vec4 wvpposition;
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out vec4 fragColor;
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void main() {
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vec2 texCoord = wvpposition.xy / wvpposition.w;
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texCoord = texCoord * 0.5 + 0.5;
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#ifdef _InvY
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texCoord.y = 1.0 - texCoord.y;
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#endif
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vec4 g0 = texture(gbuffer0, texCoord); // Normal.xy, metallic/roughness, depth
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vec4 g1 = texture(gbuffer1, texCoord); // Basecolor.rgb, spec/occ
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float spec = unpackFloat2(g1.a).g;
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// #ifdef _InvY // D3D
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// float depth = texture(gbufferD, texCoord).r * 2.0 - 1.0; // 0 - 1 => -1 - 1
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// #else
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// TODO: store_depth
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float depth = (1.0 - g0.a) * 2.0 - 1.0;
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// #endif
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vec3 n;
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n.z = 1.0 - abs(g0.x) - abs(g0.y);
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n.xy = n.z >= 0.0 ? g0.xy : octahedronWrap(g0.xy);
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n = normalize(n);
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vec3 p = getPos2(invVP, depth, texCoord);
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vec2 metrough = unpackFloat(g0.b);
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vec3 v = normalize(eye - p);
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float dotNV = dot(n, v);
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vec3 albedo = surfaceAlbedo(g1.rgb, metrough.x); // g1.rgb - basecolor
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vec3 f0 = surfaceF0(g1.rgb, metrough.x);
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vec3 lp = lightPos - p;
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vec3 l = normalize(lp);
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vec3 h = normalize(v + l);
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float dotNH = dot(n, h);
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float dotVH = dot(v, h);
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float dotNL = dot(n, l);
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float visibility = 1.0;
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#ifndef _NoShadows
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#ifdef _SoftShadows
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visibility = texture(svisibility, texCoord).r;
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#else
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if (lightShadow == 1) {
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vec4 lPos = LWVP * vec4(p + n * shadowsBias * 10, 1.0);
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if (lPos.w > 0.0) {
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#ifdef _SMSizeUniform
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visibility = shadowTest(shadowMap, lPos.xyz / lPos.w, shadowsBias, smSizeUniform);
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#else
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visibility = shadowTest(shadowMap, lPos.xyz / lPos.w, shadowsBias, shadowmapSize);
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#endif
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}
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}
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else if (lightShadow == 2) { // Cube
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visibility = PCFCube(shadowMapCube, lp, -l, shadowsBias, lightProj, n);
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}
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#endif
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#endif
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#ifdef _VoxelGIShadow // #else
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#ifdef _VoxelGICam
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vec3 voxpos = (p - eyeSnap) / voxelgiHalfExtents;
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#else
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vec3 voxpos = p / voxelgiHalfExtents;
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#endif
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if (dotNL > 0.0) visibility = max(0, 1.0 - traceShadow(voxels, voxpos, l, 0.1, length(lp), n));
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#endif
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visibility *= attenuate(distance(p, lightPos));
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#ifdef _LightIES
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visibility *= iesAttenuation(-l);
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#endif
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if (lightType == 2) { // Spot
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float spotEffect = dot(lightDir, l);
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// x - cutoff, y - cutoff - exponent
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if (spotEffect < spotlightData.x) {
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visibility *= smoothstep(spotlightData.y, spotlightData.x, spotEffect);
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}
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}
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#ifdef _LTC
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if (lightType == 3) { // Area
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float theta = acos(dotNV);
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vec2 tuv = vec2(metrough.y, theta / (0.5 * PI));
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tuv = tuv * LUT_SCALE + LUT_BIAS;
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vec4 t = texture(sltcMat, tuv);
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mat3 invM = mat3(
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vec3(1.0, 0.0, t.y),
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vec3(0.0, t.z, 0.0),
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vec3(t.w, 0.0, t.x));
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float ltcspec = ltcEvaluate(n, v, dotNV, p, invM, lightArea0, lightArea1, lightArea2, lightArea3);
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ltcspec *= texture(sltcMag, tuv).a;
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float ltcdiff = ltcEvaluate(n, v, dotNV, p, mat3(1.0), lightArea0, lightArea1, lightArea2, lightArea3);
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fragColor.rgb = albedo * ltcdiff + ltcspec * spec;
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}
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else {
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#endif
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#ifdef _Hair // Aniso
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if (texture(gbuffer2, texCoord).a == 2) {
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const float shinyParallel = metrough.y;
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const float shinyPerpendicular = 0.1;
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const vec3 v = vec3(0.99146, 0.11664, 0.05832);
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vec3 T = abs(dot(n, v)) > 0.99999 ? cross(n, vec3(0.0, 1.0, 0.0)) : cross(n, v);
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fragColor.rgb = orenNayarDiffuseBRDF(albedo, metrough.y, dotNV, dotNL, dotVH) + wardSpecular(n, h, dotNL, dotNV, dotNH, T, shinyParallel, shinyPerpendicular) * spec;
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}
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else fragColor.rgb = lambertDiffuseBRDF(albedo, dotNL) + specularBRDF(f0, metrough.y, dotNL, dotNH, dotNV, dotVH) * spec;
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#else
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#ifdef _OrenNayar
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fragColor.rgb = orenNayarDiffuseBRDF(albedo, metrough.y, dotNV, dotNL, dotVH) + specularBRDF(f0, metrough.y, dotNL, dotNH, dotNV, dotVH) * spec;
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#else
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fragColor.rgb = lambertDiffuseBRDF(albedo, dotNL) + specularBRDF(f0, metrough.y, dotNL, dotNH, dotNV, dotVH) * spec;
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#endif
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#endif
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#ifdef _LTC
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}
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#endif
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#ifdef _Hair // Aniso
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#endif
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fragColor.rgb *= lightColor;
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#ifdef _LightColTex
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// fragColor.rgb *= texture(texlightcolor, envMapEquirect(l)).rgb;
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fragColor.rgb *= pow(texture(texlightcolor, l.xy).rgb, vec3(2.2));
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#endif
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#ifdef _SSS
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if (texture(gbuffer2, texCoord).a == 2) {
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if (lightShadow == 1) fragColor.rgb += fragColor.rgb * SSSSTransmittance(LWVP, p, n, l, lightPlane.y, shadowMap);
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// else fragColor.rgb += fragColor.rgb * SSSSTransmittanceCube();
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}
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#endif
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#ifdef _SSRS
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float tvis = traceShadowSS(-l, p, gbuffer0, invVP, eye);
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// vec2 coords = getProjectedCoord(hitCoord);
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// vec2 deltaCoords = abs(vec2(0.5, 0.5) - coords.xy);
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// float screenEdgeFactor = clamp(1.0 - (deltaCoords.x + deltaCoords.y), 0.0, 1.0);
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// tvis *= screenEdgeFactor;
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visibility *= tvis;
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#endif
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fragColor.rgb *= visibility;
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#ifdef _VoxelGIRefract
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#ifdef _VoxelGICam
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vec3 voxposr = (p - eyeSnap) / voxelgiHalfExtents;
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#else
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vec3 voxposr = p / voxelgiHalfExtents;
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#endif
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float opac = texture(gbuffer2, texCoord).b;
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fragColor.rgb = mix(traceRefraction(voxels, voxposr, n, -v, metrough.y), fragColor.rgb, opac);
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#endif
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}
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