899 lines
30 KiB
GLSL
899 lines
30 KiB
GLSL
#version 450
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#ifdef GL_ES
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precision mediump float;
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#endif
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#include "../compiled.glsl"
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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 _Probes
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uniform float shirr[27 * 20]; // Maximum of 20 SH sets
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#else
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uniform float shirr[27];
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#endif
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uniform float envmapStrength;
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#ifdef _Rad
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uniform sampler2D senvmapRadiance;
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uniform sampler2D senvmapBrdf;
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uniform int envmapNumMipmaps;
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#endif
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// uniform sampler2D giblur; // Path-traced
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uniform sampler2D ssaotex;
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uniform sampler2D shadowMap;
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// #ifdef _LTC
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// uniform sampler2D sltcMat;
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// uniform sampler2D sltcMag;
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// #endif
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// uniform mat4 invVP;
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uniform mat4 LMVP;
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uniform vec3 lightPos;
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uniform vec3 lightDir;
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uniform int lightType;
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uniform int lightIndex;
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uniform vec3 lightColor;
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uniform float lightStrength;
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uniform float spotlightCutoff;
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uniform float spotlightExponent;
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uniform vec3 eye;
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uniform vec3 eyeLook;
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// uniform float time;
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// LTC
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// const float roughness = 0.25;
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// const vec3 dcolor = vec3(1.0, 1.0, 1.0);
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// const vec3 scolor = vec3(1.0, 1.0, 1.0);
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// const float intensity = 4.0; // 0-10
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// const float width = 4.0;
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// const float height = 4.0;
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// const int sampleCount = 0;
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// const int NUM_SAMPLES = 8;
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// const float LUT_SIZE = 64.0;
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// const float LUT_SCALE = (LUT_SIZE - 1.0)/LUT_SIZE;
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// const float LUT_BIAS = 0.5/LUT_SIZE;
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// vec2 mys[NUM_SAMPLES];
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// vec3 L0 = vec3(0.0);
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// vec3 L1 = vec3(0.0);
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// vec3 L2 = vec3(0.0);
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// vec3 L3 = vec3(0.0);
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// vec3 L4 = vec3(0.0);
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in vec2 texCoord;
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in vec3 viewRay;
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// out vec4 outputColor;
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// Separable SSS Transmittance Function, ref to sss_pass
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vec3 SSSSTransmittance(float translucency, float sssWidth, vec3 worldPosition, vec3 worldNormal, vec3 lightDir) {
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float scale = 8.25 * (1.0 - translucency) / sssWidth;
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vec4 shrinkedPos = vec4(worldPosition - 0.005 * worldNormal, 1.0);
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vec4 shadowPosition = LMVP * shrinkedPos;
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float d1 = texture(shadowMap, shadowPosition.xy / shadowPosition.w).r; // 'd1' has a range of 0..1
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float d2 = shadowPosition.z; // 'd2' has a range of 0..'lightFarPlane'
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const float lightFarPlane = 120 / 3.5;
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d1 *= lightFarPlane; // So we scale 'd1' accordingly:
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float d = scale * abs(d1 - d2);
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float dd = -d * d;
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vec3 profile = vec3(0.233, 0.455, 0.649) * exp(dd / 0.0064) +
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vec3(0.1, 0.336, 0.344) * exp(dd / 0.0484) +
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vec3(0.118, 0.198, 0.0) * exp(dd / 0.187) +
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vec3(0.113, 0.007, 0.007) * exp(dd / 0.567) +
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vec3(0.358, 0.004, 0.0) * exp(dd / 1.99) +
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vec3(0.078, 0.0, 0.0) * exp(dd / 7.41);
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return profile * clamp(0.3 + dot(lightDir, -worldNormal), 0.0, 1.0);
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}
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vec2 envMapEquirect(vec3 normal) {
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float phi = acos(normal.z);
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float theta = atan(-normal.y, normal.x) + PI;
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return vec2(theta / PI2, phi / PI);
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}
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#ifdef _Rad
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float getMipLevelFromRoughness(float roughness) {
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// First mipmap level = roughness 0, last = roughness = 1
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// baseColor texture already counted
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return roughness * envmapNumMipmaps;
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}
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#endif
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vec3 surfaceAlbedo(vec3 baseColor, float metalness) {
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return mix(baseColor, vec3(0.0), metalness);
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}
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vec3 surfaceF0(vec3 baseColor, float metalness) {
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return mix(vec3(0.04), baseColor, metalness);
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}
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vec3 f_schlick(vec3 f0, float vh) {
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return f0 + (1.0-f0)*exp2((-5.55473 * vh - 6.98316)*vh);
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}
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float v_smithschlick(float nl, float nv, float a) {
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return 1.0 / ( (nl*(1.0-a)+a) * (nv*(1.0-a)+a) );
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}
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float d_ggx(float nh, float a) {
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float a2 = a*a;
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float denom = pow(nh*nh * (a2-1.0) + 1.0, 2.0);
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return a2 * (1.0 / 3.1415926535) / denom;
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}
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vec3 specularBRDF(vec3 f0, float roughness, float nl, float nh, float nv, float vh, float lh) {
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float a = roughness * roughness;
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return d_ggx(nh, a) * clamp(v_smithschlick(nl, nv, a), 0.0, 1.0) * f_schlick(f0, vh) / 4.0;
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//return vec3(LightingFuncGGX_OPT3(nl, lh, nh, roughness, f0[0]));
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}
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vec3 lambert(vec3 albedo, float nl) {
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return albedo * max(0.0, nl);
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}
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vec3 diffuseBRDF(vec3 albedo, float roughness, float nv, float nl, float vh, float lv) {
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return lambert(albedo, nl);
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}
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float texture2DCompare(vec2 uv, float compare){
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float depth = texture(shadowMap, uv).r * 2.0 - 1.0;
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return step(compare, depth);
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}
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float texture2DShadowLerp(vec2 size, vec2 uv, float compare){
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vec2 texelSize = vec2(1.0) / size;
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vec2 f = fract(uv * size + 0.5);
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vec2 centroidUV = floor(uv * size + 0.5) / size;
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float lb = texture2DCompare(centroidUV + texelSize * vec2(0.0, 0.0), compare);
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float lt = texture2DCompare(centroidUV + texelSize * vec2(0.0, 1.0), compare);
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float rb = texture2DCompare(centroidUV + texelSize * vec2(1.0, 0.0), compare);
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float rt = texture2DCompare(centroidUV + texelSize * vec2(1.0, 1.0), compare);
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float a = mix(lb, lt, f.y);
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float b = mix(rb, rt, f.y);
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float c = mix(a, b, f.x);
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return c;
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}
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float PCF(vec2 uv, float compare) {
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float result = 0.0;
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// for (int x = -1; x <= 1; x++){
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// for(int y = -1; y <= 1; y++){
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// vec2 off = vec2(x, y) / shadowmapSize;
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// result += texture2DShadowLerp(shadowmapSize, uv + off, compare);
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vec2 off = vec2(-1, -1) / shadowmapSize;
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result += texture2DShadowLerp(shadowmapSize, uv + off, compare);
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off = vec2(-1, 0) / shadowmapSize;
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result += texture2DShadowLerp(shadowmapSize, uv + off, compare);
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off = vec2(-1, 1) / shadowmapSize;
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result += texture2DShadowLerp(shadowmapSize, uv + off, compare);
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off = vec2(0, -1) / shadowmapSize;
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result += texture2DShadowLerp(shadowmapSize, uv + off, compare);
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off = vec2(0, 0) / shadowmapSize;
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result += texture2DShadowLerp(shadowmapSize, uv + off, compare);
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off = vec2(0, 1) / shadowmapSize;
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result += texture2DShadowLerp(shadowmapSize, uv + off, compare);
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off = vec2(1, -1) / shadowmapSize;
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result += texture2DShadowLerp(shadowmapSize, uv + off, compare);
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off = vec2(1, 0) / shadowmapSize;
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result += texture2DShadowLerp(shadowmapSize, uv + off, compare);
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off = vec2(1, 1) / shadowmapSize;
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result += texture2DShadowLerp(shadowmapSize, uv + off, compare);
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// }
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// }
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return result / 9.0;
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}
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// #define _PCSS
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#ifdef _PCSS
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// Based on ThreeJS PCSS example
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const float LIGHT_WORLD_SIZE = 3.55;
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const float LIGHT_FRUSTUM_WIDTH = 4.75;//5.75; //12.75
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const float LIGHT_SIZE_UV = (LIGHT_WORLD_SIZE / LIGHT_FRUSTUM_WIDTH);
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const float NEAR_PLANE = 0.5;
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const int NUM_SAMPLES = 17;//17
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const int NUM_RINGS = 11;
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// vec2 poissonDisk[NUM_SAMPLES];
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vec2 poissonDisk0;
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vec2 poissonDisk1;
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vec2 poissonDisk2;
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vec2 poissonDisk3;
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vec2 poissonDisk4;
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vec2 poissonDisk5;
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vec2 poissonDisk6;
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vec2 poissonDisk7;
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vec2 poissonDisk8;
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vec2 poissonDisk9;
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vec2 poissonDisk10;
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vec2 poissonDisk11;
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vec2 poissonDisk12;
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vec2 poissonDisk13;
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vec2 poissonDisk14;
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vec2 poissonDisk15;
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vec2 poissonDisk16;
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float rand(vec2 co) {
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return fract(sin(dot(co.xy ,vec2(12.9898, 78.233))) * 43758.5453);
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}
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void initPoissonSamples(const in vec2 randomSeed) {
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const float ANGLE_STEP = PI2 * float(NUM_RINGS) / float(NUM_SAMPLES);
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const float INV_NUM_SAMPLES = 1.0 / float(NUM_SAMPLES);
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float angle = rand(randomSeed) * PI2;
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float radius = INV_NUM_SAMPLES;
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float radiusStep = radius;
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// for (int i = 0; i < NUM_SAMPLES; i++) {
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poissonDisk0 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
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radius += radiusStep; angle += ANGLE_STEP;
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poissonDisk1 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
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radius += radiusStep; angle += ANGLE_STEP;
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poissonDisk2 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
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radius += radiusStep; angle += ANGLE_STEP;
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poissonDisk3 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
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radius += radiusStep; angle += ANGLE_STEP;
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poissonDisk4 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
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radius += radiusStep; angle += ANGLE_STEP;
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poissonDisk5 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
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radius += radiusStep; angle += ANGLE_STEP;
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poissonDisk6 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
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radius += radiusStep; angle += ANGLE_STEP;
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poissonDisk7 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
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radius += radiusStep; angle += ANGLE_STEP;
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poissonDisk8 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
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radius += radiusStep; angle += ANGLE_STEP;
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poissonDisk9 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
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radius += radiusStep; angle += ANGLE_STEP;
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poissonDisk10 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
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radius += radiusStep; angle += ANGLE_STEP;
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poissonDisk11 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
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radius += radiusStep; angle += ANGLE_STEP;
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poissonDisk12 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
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radius += radiusStep; angle += ANGLE_STEP;
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poissonDisk13 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
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radius += radiusStep; angle += ANGLE_STEP;
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poissonDisk14 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
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radius += radiusStep; angle += ANGLE_STEP;
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poissonDisk15 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
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radius += radiusStep; angle += ANGLE_STEP;
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poissonDisk16 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
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radius += radiusStep; angle += ANGLE_STEP;
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// }
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}
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float penumbraSize(const in float zReceiver, const in float zBlocker) { // Parallel plane estimation
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return (zReceiver - zBlocker) / zBlocker;
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}
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float findBlocker(const in vec2 uv, const in float zReceiver) {
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// This uses similar triangles to compute what area of the shadow map we should search
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float searchRadius = LIGHT_SIZE_UV * (zReceiver - NEAR_PLANE) / zReceiver;
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float blockerDepthSum = 0.0;
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int numBlockers = 0;
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// for (int i = 0; i < NUM_SAMPLES; i++) {
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float shadowMapDepth = texture(shadowMap, uv + poissonDisk0 * searchRadius).r * 2.0 - 1.0;
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if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
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shadowMapDepth = texture(shadowMap, uv + poissonDisk1 * searchRadius).r * 2.0 - 1.0;
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if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
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shadowMapDepth = texture(shadowMap, uv + poissonDisk2 * searchRadius).r * 2.0 - 1.0;
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if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
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shadowMapDepth = texture(shadowMap, uv + poissonDisk3 * searchRadius).r * 2.0 - 1.0;
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if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
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shadowMapDepth = texture(shadowMap, uv + poissonDisk4 * searchRadius).r * 2.0 - 1.0;
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if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
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shadowMapDepth = texture(shadowMap, uv + poissonDisk5 * searchRadius).r * 2.0 - 1.0;
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if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
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shadowMapDepth = texture(shadowMap, uv + poissonDisk6 * searchRadius).r * 2.0 - 1.0;
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if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
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shadowMapDepth = texture(shadowMap, uv + poissonDisk7 * searchRadius).r * 2.0 - 1.0;
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if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
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shadowMapDepth = texture(shadowMap, uv + poissonDisk8 * searchRadius).r * 2.0 - 1.0;
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if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
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shadowMapDepth = texture(shadowMap, uv + poissonDisk9 * searchRadius).r * 2.0 - 1.0;
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if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
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shadowMapDepth = texture(shadowMap, uv + poissonDisk10 * searchRadius).r * 2.0 - 1.0;
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if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
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shadowMapDepth = texture(shadowMap, uv + poissonDisk11 * searchRadius).r * 2.0 - 1.0;
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if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
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shadowMapDepth = texture(shadowMap, uv + poissonDisk12 * searchRadius).r * 2.0 - 1.0;
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if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
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shadowMapDepth = texture(shadowMap, uv + poissonDisk13 * searchRadius).r * 2.0 - 1.0;
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if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
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shadowMapDepth = texture(shadowMap, uv + poissonDisk14 * searchRadius).r * 2.0 - 1.0;
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if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
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shadowMapDepth = texture(shadowMap, uv + poissonDisk15 * searchRadius).r * 2.0 - 1.0;
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if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
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shadowMapDepth = texture(shadowMap, uv + poissonDisk16 * searchRadius).r * 2.0 - 1.0;
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if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
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// }
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if (numBlockers == 0) return -1.0;
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return blockerDepthSum / float(numBlockers);
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}
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float PCF_Filter(vec2 uv, float zReceiver, float filterRadius) {
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float sum = 0.0;
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// for (int i = 0; i < NUM_SAMPLES; i++) {
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float depth = texture(shadowMap, uv + poissonDisk0 * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + poissonDisk1 * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + poissonDisk2 * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + poissonDisk3 * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + poissonDisk4 * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + poissonDisk5 * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + poissonDisk6 * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + poissonDisk7 * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + poissonDisk8 * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + poissonDisk9 * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + poissonDisk10 * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + poissonDisk11 * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + poissonDisk12 * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + poissonDisk13 * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + poissonDisk14 * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + poissonDisk15 * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + poissonDisk16 * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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// }
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// for (int i = 0; i < NUM_SAMPLES; i++) {
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depth = texture(shadowMap, uv + -poissonDisk0.yx * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + -poissonDisk1.yx * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + -poissonDisk2.yx * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + -poissonDisk3.yx * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + -poissonDisk4.yx * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + -poissonDisk5.yx * filterRadius).r * 2.0 - 1.0;
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if (zReceiver <= depth) sum += 1.0;
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depth = texture(shadowMap, uv + -poissonDisk6.yx * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + -poissonDisk7.yx * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + -poissonDisk8.yx * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + -poissonDisk9.yx * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + -poissonDisk10.yx * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + -poissonDisk11.yx * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + -poissonDisk12.yx * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + -poissonDisk13.yx * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + -poissonDisk14.yx * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + -poissonDisk15.yx * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + -poissonDisk16.yx * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
// }
|
|
return sum / (2.0 * float(NUM_SAMPLES));
|
|
}
|
|
|
|
float PCSS(vec2 uv, float zReceiver) {
|
|
initPoissonSamples(uv);
|
|
|
|
// Blocker search
|
|
float avgBlockerDepth = findBlocker(uv, zReceiver);
|
|
|
|
// There are no occluders so early out (this saves filtering)
|
|
if (avgBlockerDepth == -1.0) return 1.0;
|
|
|
|
// Penumbra size
|
|
float penumbraRatio = penumbraSize(zReceiver, avgBlockerDepth);
|
|
float filterRadius = penumbraRatio * LIGHT_SIZE_UV * NEAR_PLANE / zReceiver;
|
|
|
|
// Filtering
|
|
return PCF_Filter(uv, zReceiver, filterRadius);
|
|
}
|
|
#endif
|
|
|
|
|
|
|
|
float shadowTest(vec4 lPos) {
|
|
vec4 lPosH = lPos / lPos.w;
|
|
lPosH.x = (lPosH.x + 1.0) / 2.0;
|
|
lPosH.y = (lPosH.y + 1.0) / 2.0;
|
|
|
|
// const float bias = 0.00005; // Persp
|
|
const float bias = 0.00125; // Persp
|
|
// const float bias = 0.01; // Ortho
|
|
|
|
#ifdef _PCSS
|
|
return PCSS(lPosH.xy, lPosH.z - bias);
|
|
#else
|
|
return PCF(lPosH.xy, lPosH.z - bias);
|
|
#endif
|
|
}
|
|
|
|
vec2 octahedronWrap(vec2 v) {
|
|
return (1.0 - abs(v.yx)) * (vec2(v.x >= 0.0 ? 1.0 : -1.0, v.y >= 0.0 ? 1.0 : -1.0));
|
|
}
|
|
|
|
vec3 getPos(float depth) {
|
|
// vec4 pos = vec4(coord * 2.0 - 1.0, depth * 2.0 - 1.0, 1.0);
|
|
// vec4 pos = vec4(coord * 2.0 - 1.0, depth, 1.0);
|
|
// pos = invVP * pos;
|
|
// pos.xyz /= pos.w;
|
|
// return pos.xyz;
|
|
|
|
vec3 vray = normalize(viewRay);
|
|
const float projectionA = cameraPlane.y / (cameraPlane.y - cameraPlane.x);
|
|
const float projectionB = (-cameraPlane.y * cameraPlane.x) / (cameraPlane.y - cameraPlane.x);
|
|
// float linearDepth = projectionB / (depth - projectionA);
|
|
float linearDepth = projectionB / (depth * 0.5 + 0.5 - projectionA);
|
|
float viewZDist = dot(eyeLook, vray);
|
|
vec3 wposition = eye + vray * (linearDepth / viewZDist);
|
|
return wposition;
|
|
}
|
|
|
|
vec2 unpackFloat(float f) {
|
|
float index = floor(f) / 1000.0;
|
|
float alpha = fract(f);
|
|
return vec2(index, alpha);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// Linearly Transformed Cosines
|
|
// https://eheitzresearch.wordpress.com/415-2/
|
|
// vec3 mul(mat3 m, vec3 v) {
|
|
// return m * v;
|
|
// }
|
|
// mat3 mul(mat3 m1, mat3 m2) {
|
|
// return m1 * m2;
|
|
// }
|
|
// mat3 transpose2(mat3 v) {
|
|
// mat3 tmp;
|
|
// tmp[0] = vec3(v[0].x, v[1].x, v[2].x);
|
|
// tmp[1] = vec3(v[0].y, v[1].y, v[2].y);
|
|
// tmp[2] = vec3(v[0].z, v[1].z, v[2].z);
|
|
|
|
// return tmp;
|
|
// }
|
|
// float IntegrateEdge(vec3 v1, vec3 v2) {
|
|
// float cosTheta = dot(v1, v2);
|
|
// cosTheta = clamp(cosTheta, -0.9999, 0.9999);
|
|
// float theta = acos(cosTheta);
|
|
// float res = cross(v1, v2).z * theta / sin(theta);
|
|
// return res;
|
|
// }
|
|
// int ClipQuadToHorizon(/*inout vec3 L[5], out int n*/) {
|
|
// // detect clipping config
|
|
// int config = 0;
|
|
// if (L0.z > 0.0) config += 1;
|
|
// if (L1.z > 0.0) config += 2;
|
|
// if (L2.z > 0.0) config += 4;
|
|
// if (L3.z > 0.0) config += 8;
|
|
|
|
// // clip
|
|
// int n = 0;
|
|
// if (config == 0) {
|
|
// // clip all
|
|
// }
|
|
// else if (config == 1) { // V1 clip V2 V3 V4
|
|
// n = 3;
|
|
// L1 = -L1.z * L0 + L0.z * L1;
|
|
// L2 = -L3.z * L0 + L0.z * L3;
|
|
// }
|
|
// else if (config == 2) { // V2 clip V1 V3 V4
|
|
// n = 3;
|
|
// L0 = -L0.z * L1 + L1.z * L0;
|
|
// L2 = -L2.z * L1 + L1.z * L2;
|
|
// }
|
|
// else if (config == 3) { // V1 V2 clip V3 V4
|
|
// n = 4;
|
|
// L2 = -L2.z * L1 + L1.z * L2;
|
|
// L3 = -L3.z * L0 + L0.z * L3;
|
|
// }
|
|
// else if (config == 4) { // V3 clip V1 V2 V4
|
|
// n = 3;
|
|
// L0 = -L3.z * L2 + L2.z * L3;
|
|
// L1 = -L1.z * L2 + L2.z * L1;
|
|
// }
|
|
// else if (config == 5) { // V1 V3 clip V2 V4) impossible
|
|
// n = 0;
|
|
// }
|
|
// else if (config == 6) { // V2 V3 clip V1 V4
|
|
// n = 4;
|
|
// L0 = -L0.z * L1 + L1.z * L0;
|
|
// L3 = -L3.z * L2 + L2.z * L3;
|
|
// }
|
|
// else if (config == 7) { // V1 V2 V3 clip V4
|
|
// n = 5;
|
|
// L4 = -L3.z * L0 + L0.z * L3;
|
|
// L3 = -L3.z * L2 + L2.z * L3;
|
|
// }
|
|
// else if (config == 8) { // V4 clip V1 V2 V3
|
|
// n = 3;
|
|
// L0 = -L0.z * L3 + L3.z * L0;
|
|
// L1 = -L2.z * L3 + L3.z * L2;
|
|
// L2 = L3;
|
|
// }
|
|
// else if (config == 9) { // V1 V4 clip V2 V3
|
|
// n = 4;
|
|
// L1 = -L1.z * L0 + L0.z * L1;
|
|
// L2 = -L2.z * L3 + L3.z * L2;
|
|
// }
|
|
// else if (config == 10) { // V2 V4 clip V1 V3) impossible
|
|
// n = 0;
|
|
// }
|
|
// else if (config == 11) { // V1 V2 V4 clip V3
|
|
// n = 5;
|
|
// L4 = L3;
|
|
// L3 = -L2.z * L3 + L3.z * L2;
|
|
// L2 = -L2.z * L1 + L1.z * L2;
|
|
// }
|
|
// else if (config == 12) { // V3 V4 clip V1 V2
|
|
// n = 4;
|
|
// L1 = -L1.z * L2 + L2.z * L1;
|
|
// L0 = -L0.z * L3 + L3.z * L0;
|
|
// }
|
|
// else if (config == 13) { // V1 V3 V4 clip V2
|
|
// n = 5;
|
|
// L4 = L3;
|
|
// L3 = L2;
|
|
// L2 = -L1.z * L2 + L2.z * L1;
|
|
// L1 = -L1.z * L0 + L0.z * L1;
|
|
// }
|
|
// else if (config == 14) { // V2 V3 V4 clip V1
|
|
// n = 5;
|
|
// L4 = -L0.z * L3 + L3.z * L0;
|
|
// L0 = -L0.z * L1 + L1.z * L0;
|
|
// }
|
|
// else if (config == 15) { // V1 V2 V3 V4
|
|
// n = 4;
|
|
// }
|
|
|
|
// if (n == 3)
|
|
// L3 = L0;
|
|
// if (n == 4)
|
|
// L4 = L0;
|
|
// return n;
|
|
// }
|
|
// vec3 LTC_Evaluate(vec3 N, vec3 V, vec3 P, mat3 Minv, vec3 points0, vec3 points1, vec3 points2, vec3 points3, bool twoSided) {
|
|
// // construct orthonormal basis around N
|
|
// vec3 T1, T2;
|
|
// T1 = normalize(V - N*dot(V, N));
|
|
// T2 = cross(N, T1);
|
|
|
|
// // rotate area light in (T1, T2, R) basis
|
|
// Minv = mul(Minv, transpose2(mat3(T1, T2, N)));
|
|
|
|
// // polygon (allocate 5 vertices for clipping)
|
|
// // vec3 L[5];
|
|
// L0 = mul(Minv, points0 - P);
|
|
// L1 = mul(Minv, points1 - P);
|
|
// L2 = mul(Minv, points2 - P);
|
|
// L3 = mul(Minv, points3 - P);
|
|
|
|
// int n = ClipQuadToHorizon(/*L, n*/);
|
|
|
|
// if (n == 0) {
|
|
// return vec3(0, 0, 0);
|
|
// }
|
|
|
|
// // project onto sphere
|
|
// L0 = normalize(L0);
|
|
// L1 = normalize(L1);
|
|
// L2 = normalize(L2);
|
|
// L3 = normalize(L3);
|
|
// L4 = normalize(L4);
|
|
|
|
// // integrate
|
|
// float sum = 0.0;
|
|
|
|
// sum += IntegrateEdge(L0, L1);
|
|
// sum += IntegrateEdge(L1, L2);
|
|
// sum += IntegrateEdge(L2, L3);
|
|
|
|
// if (n >= 4) {
|
|
// sum += IntegrateEdge(L3, L4);
|
|
// }
|
|
// if (n == 5) {
|
|
// sum += IntegrateEdge(L4, L0);
|
|
// }
|
|
|
|
// sum = twoSided ? abs(sum) : max(0.0, -sum);
|
|
|
|
// vec3 Lo_i = vec3(sum, sum, sum);
|
|
|
|
// return Lo_i;
|
|
// }
|
|
|
|
#ifdef _Aniso
|
|
float wardSpecular(vec3 N, vec3 H, float dotNL, float dotNV, float dotNH, vec3 fiberDirection, float shinyParallel, float shinyPerpendicular) {
|
|
if(dotNL < 0.0 || dotNV < 0.0) {
|
|
return 0.0;
|
|
}
|
|
// fiberDirection - parse from rotation
|
|
// shinyParallel - roughness
|
|
// shinyPerpendicular - anisotropy
|
|
|
|
vec3 fiberParallel = normalize(fiberDirection);
|
|
vec3 fiberPerpendicular = normalize(cross(N, fiberDirection));
|
|
float dotXH = dot(fiberParallel, H);
|
|
float dotYH = dot(fiberPerpendicular, H);
|
|
float coeff = sqrt(dotNL/dotNV) / (4.0 * PI * shinyParallel * shinyPerpendicular);
|
|
float theta = (pow(dotXH/shinyParallel, 2.0) + pow(dotYH/shinyPerpendicular, 2.0)) / (1.0 + dotNH);
|
|
return clamp(coeff * exp(-2.0 * theta), 0.0, 1.0);
|
|
}
|
|
#endif
|
|
|
|
#ifdef _Probes
|
|
vec3 shIrradiance(vec3 nor, float scale, int probe) {
|
|
#else
|
|
vec3 shIrradiance(vec3 nor, float scale) {
|
|
#endif
|
|
const float c1 = 0.429043;
|
|
const float c2 = 0.511664;
|
|
const float c3 = 0.743125;
|
|
const float c4 = 0.886227;
|
|
const float c5 = 0.247708;
|
|
vec3 cl00, cl1m1, cl10, cl11, cl2m2, cl2m1, cl20, cl21, cl22;
|
|
#ifdef _Probes
|
|
if (probe == 0) {
|
|
#endif
|
|
cl00 = vec3(shirr[0], shirr[1], shirr[2]);
|
|
cl1m1 = vec3(shirr[3], shirr[4], shirr[5]);
|
|
cl10 = vec3(shirr[6], shirr[7], shirr[8]);
|
|
cl11 = vec3(shirr[9], shirr[10], shirr[11]);
|
|
cl2m2 = vec3(shirr[12], shirr[13], shirr[14]);
|
|
cl2m1 = vec3(shirr[15], shirr[16], shirr[17]);
|
|
cl20 = vec3(shirr[18], shirr[19], shirr[20]);
|
|
cl21 = vec3(shirr[21], shirr[22], shirr[23]);
|
|
cl22 = vec3(shirr[24], shirr[25], shirr[26]);
|
|
#ifdef _Probes
|
|
}
|
|
else if (probe == 1) {
|
|
cl00 = vec3(shirr[27 + 0], shirr[27 + 1], shirr[27 + 2]);
|
|
cl1m1 = vec3(shirr[27 + 3], shirr[27 + 4], shirr[27 + 5]);
|
|
cl10 = vec3(shirr[27 + 6], shirr[27 + 7], shirr[27 + 8]);
|
|
cl11 = vec3(shirr[27 + 9], shirr[27 + 10], shirr[27 + 11]);
|
|
cl2m2 = vec3(shirr[27 + 12], shirr[27 + 13], shirr[27 + 14]);
|
|
cl2m1 = vec3(shirr[27 + 15], shirr[27 + 16], shirr[27 + 17]);
|
|
cl20 = vec3(shirr[27 + 18], shirr[27 + 19], shirr[27 + 20]);
|
|
cl21 = vec3(shirr[27 + 21], shirr[27 + 22], shirr[27 + 23]);
|
|
cl22 = vec3(shirr[27 + 24], shirr[27 + 25], shirr[27 + 26]);
|
|
}
|
|
#endif
|
|
return (
|
|
c1 * cl22 * (nor.x * nor.x - (-nor.z) * (-nor.z)) +
|
|
c3 * cl20 * nor.y * nor.y +
|
|
c4 * cl00 -
|
|
c5 * cl20 +
|
|
2.0 * c1 * cl2m2 * nor.x * (-nor.z) +
|
|
2.0 * c1 * cl21 * nor.x * nor.y +
|
|
2.0 * c1 * cl2m1 * (-nor.z) * nor.y +
|
|
2.0 * c2 * cl11 * nor.x +
|
|
2.0 * c2 * cl1m1 * (-nor.z) +
|
|
2.0 * c2 * cl10 * nor.y
|
|
) * scale;
|
|
}
|
|
|
|
|
|
void main() {
|
|
float depth = texture(gbufferD, texCoord).r * 2.0 - 1.0;
|
|
// float depth = 1.0 - g0.a;
|
|
// if (depth == 0.0) discard;
|
|
if (depth == 1.0) discard;
|
|
|
|
vec4 g0 = texture(gbuffer0, texCoord); // Normal.xy, occlusion, mask
|
|
vec4 g1 = texture(gbuffer1, texCoord); // Base color.rgb, roughn/met
|
|
|
|
vec2 enc = g0.rg;
|
|
vec3 n;
|
|
n.z = 1.0 - abs(enc.x) - abs(enc.y);
|
|
n.xy = n.z >= 0.0 ? enc.xy : octahedronWrap(enc.xy);
|
|
n = normalize(n);
|
|
|
|
vec3 p = getPos(depth);
|
|
vec3 baseColor = g1.rgb;
|
|
vec2 roughmet = unpackFloat(g1.a);
|
|
float roughness = roughmet.x;
|
|
float metalness = roughmet.y;
|
|
|
|
vec3 eyeDir = eye - p.xyz;
|
|
vec3 v = normalize(eyeDir);
|
|
float dotNV = max(dot(n, v), 0.0);
|
|
|
|
vec3 albedo = surfaceAlbedo(baseColor, metalness);
|
|
vec3 f0 = surfaceF0(baseColor, metalness);
|
|
|
|
// Per-light
|
|
vec3 l;
|
|
if (lightType == 0) { // Sun
|
|
l = lightDir;
|
|
}
|
|
else { // Point, spot
|
|
l = normalize(lightPos - p.xyz);
|
|
}
|
|
|
|
vec3 h = normalize(v + l);
|
|
float dotNH = max(dot(n, h), 0.0);
|
|
float dotVH = max(dot(v, h), 0.0);
|
|
float dotNL = max(dot(n, l), 0.0);
|
|
float dotLV = max(dot(l, v), 0.0);
|
|
float dotLH = max(dot(l, h), 0.0);
|
|
|
|
vec4 lPos = LMVP * vec4(vec3(p), 1.0);
|
|
float visibility = 1.0;
|
|
if (lPos.w > 0.0) {
|
|
visibility = shadowTest(lPos);
|
|
//visibility = 1.0;
|
|
}
|
|
|
|
// Direct
|
|
vec3 direct = diffuseBRDF(albedo, roughness, dotNV, dotNL, dotVH, dotLV) + specularBRDF(f0, roughness, dotNL, dotNH, dotNV, dotVH, dotLH);
|
|
|
|
if (lightType == 2) { // Spot
|
|
float spotEffect = dot(lightDir, l);
|
|
if (spotEffect < spotlightCutoff) {
|
|
spotEffect = smoothstep(spotlightCutoff - spotlightExponent, spotlightCutoff, spotEffect);
|
|
direct *= spotEffect;
|
|
}
|
|
}
|
|
|
|
// Aniso spec
|
|
// float shinyParallel = roughness;
|
|
// float shinyPerpendicular = 0.08;
|
|
// vec3 fiberDirection = vec3(0.0, 1.0, 8.0);
|
|
// vec3 direct = diffuseBRDF(albedo, roughness, dotNV, dotNL, dotVH, dotLV) + wardSpecular(n, h, dotNL, dotNV, dotNH, fiberDirection, shinyParallel, shinyPerpendicular);
|
|
direct = direct * lightColor * lightStrength;
|
|
|
|
|
|
#ifdef _SSS
|
|
float mask = g0.a;
|
|
if (mask == 2.0) {
|
|
direct.rgb = direct.rgb * SSSSTransmittance(1.0, 0.005, p, n, l);
|
|
}
|
|
#endif
|
|
|
|
|
|
// Indirect
|
|
if (lightIndex == 0) {
|
|
#ifdef _Probes
|
|
float probeFactor = mask;
|
|
float probeID = floor(probeFactor);
|
|
float probeFract = fract(probeFactor);
|
|
vec3 indirectDiffuse;
|
|
#ifdef _Rad
|
|
float lod = getMipLevelFromRoughness(roughness);
|
|
vec3 reflectionWorld = reflect(-v, n);
|
|
vec2 envCoordRefl = envMapEquirect(reflectionWorld);
|
|
vec3 prefilteredColor = textureLod(senvmapRadiance, envCoordRefl, lod).rgb;
|
|
#endif
|
|
|
|
// Global probe only
|
|
if (probeID == 0.0) {
|
|
indirectDiffuse = shIrradiance(n, 2.2, 0) / PI;
|
|
}
|
|
// fract 0 = local probe, 1 = global probe
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else if (probeID == 1.0) {
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indirectDiffuse = (shIrradiance(n, 2.2, 1) / PI) * (1.0 - probeFract);
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//prefilteredColor /= 4.0;
|
|
if (probeFract > 0.0) {
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|
indirectDiffuse += (shIrradiance(n, 2.2, 0) / PI) * (probeFract);
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|
}
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|
}
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|
#else // No probes
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|
// vec3 indirectDiffuse = texture(shirr, envMapEquirect(n)).rgb;
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|
vec3 indirectDiffuse = shIrradiance(n, 2.2) / PI;
|
|
#ifdef _Rad
|
|
vec3 reflectionWorld = reflect(-v, n);
|
|
float lod = getMipLevelFromRoughness(roughness);
|
|
vec3 prefilteredColor = textureLod(senvmapRadiance, envMapEquirect(reflectionWorld), lod).rgb;
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|
#endif
|
|
#endif
|
|
|
|
#ifdef _LDR
|
|
indirectDiffuse = pow(indirectDiffuse, vec3(2.2));
|
|
#ifdef _Rad
|
|
prefilteredColor = pow(prefilteredColor, vec3(2.2));
|
|
#endif
|
|
#endif
|
|
indirectDiffuse *= albedo;
|
|
|
|
vec3 indirect = indirectDiffuse;
|
|
#ifdef _Rad
|
|
vec2 envBRDF = texture(senvmapBrdf, vec2(roughness, 1.0 - dotNV)).xy;
|
|
vec3 indirectSpecular = prefilteredColor * (f0 * envBRDF.x + envBRDF.y);
|
|
indirect += indirectSpecular;
|
|
#endif
|
|
indirect = indirect * envmapStrength;// * lightColor * lightStrength;
|
|
float occlusion = g0.b;
|
|
float ao = texture(ssaotex, texCoord).r;
|
|
indirect = indirect * ao * occlusion;
|
|
gl_FragColor = vec4(vec3(direct * visibility + indirect), 1.0);
|
|
return;
|
|
}
|
|
else {
|
|
gl_FragColor = vec4(vec3(direct * visibility), 1.0);
|
|
return;
|
|
}
|
|
|
|
|
|
// vec4 outColor = vec4(vec3(direct * visibility + indirect), 1.0);
|
|
|
|
// Path-traced
|
|
// vec4 nois = texture(giblur, texCoord);
|
|
// nois.rgb = pow(nois.rgb, vec3(1.0 / 2.2));
|
|
// indirect = nois.rgb;
|
|
// vec4 outColor = vec4(vec3(direct * visibility + indirect * 3.0 * ao * occlusion), 1.0);
|
|
|
|
|
|
// LTC
|
|
// float sinval = (sin(time) * 0.5 + 0.5);
|
|
// vec4 outColor = vec4(1.0);
|
|
// float rectSizeX = 4.000 + sin(time) * 4.0;
|
|
// float rectSizeY = 1.2;// + sin(time * 2.0);
|
|
// vec3 ex = vec3(1, 0, 0)*rectSizeX;
|
|
// vec3 ey = vec3(0, 0, 1)*rectSizeY;
|
|
// vec3 p1 = lightPos - ex + ey;
|
|
// vec3 p2 = lightPos + ex + ey;
|
|
// vec3 p3 = lightPos + ex - ey;
|
|
// vec3 p4 = lightPos - ex - ey;
|
|
// float theta = acos(dotNV);
|
|
// vec2 tuv = vec2(roughness, theta/(0.5*PI));
|
|
// tuv = tuv*LUT_SCALE + LUT_BIAS;
|
|
|
|
// vec4 t = texture(sltcMat, tuv);
|
|
// mat3 Minv = mat3(
|
|
// vec3( 1, t.y, 0),
|
|
// vec3( 0, 0, t.z),
|
|
// vec3(t.w, 0, t.x)
|
|
// );
|
|
|
|
// vec3 ltcspec = LTC_Evaluate(n, v, p, Minv, p1, p2, p3, p4, true);
|
|
|
|
// ltcspec *= vec3(1.0, 1.0 - sinval, 1.0 - sinval);
|
|
|
|
// ltcspec *= texture(sltcMag, tuv).a;
|
|
// vec3 ltcdiff = LTC_Evaluate(n, v, p, mat3(1), p1, p2, p3, p4, true);
|
|
|
|
// ltcdiff *= vec3(1.0, 1.0 - sinval, 1.0 - sinval);
|
|
|
|
// vec3 ltccol = ltcspec + ltcdiff * albedo;
|
|
// ltccol /= 2.0*PI;
|
|
// outColor.rgb = ltccol * 5.0 * visibility + (indirect / 14.0 * ao * (rectSizeX / 6.0) );
|
|
// // outColor.rgb = ltccol * visibility + (indirect / 2.0 * ao);
|
|
|
|
|
|
// outColor = vec4(pow(outColor.rgb, vec3(1.0 / 2.2)), outColor.a);
|
|
// outputColor = vec4(outColor.rgb, outColor.a);
|
|
//gl_FragColor = vec4(outColor.rgb, outColor.a);
|
|
}
|