837 lines
30 KiB
GLSL
837 lines
30 KiB
GLSL
#version 450
|
|
|
|
#ifdef GL_ES
|
|
precision mediump float;
|
|
#endif
|
|
|
|
#include "../compiled.glsl"
|
|
|
|
uniform sampler2D gbufferD;
|
|
uniform sampler2D gbuffer0;
|
|
uniform sampler2D gbuffer1;
|
|
|
|
// #ifdef _Probes
|
|
// uniform float shirr[27 * 20]; // Maximum of 20 SH sets
|
|
// #else
|
|
// uniform float shirr[27];
|
|
// #endif
|
|
// uniform float envmapStrength;
|
|
// #ifdef _Rad
|
|
// uniform sampler2D senvmapRadiance;
|
|
// uniform sampler2D senvmapBrdf;
|
|
// uniform int envmapNumMipmaps;
|
|
// #endif
|
|
|
|
// uniform sampler2D giblur; // Path-traced
|
|
|
|
// #ifdef _SSAO
|
|
// uniform sampler2D ssaotex;
|
|
// #endif
|
|
#ifndef _NoShadows
|
|
uniform sampler2D shadowMap;
|
|
#ifdef _PCSS
|
|
uniform sampler2D snoise;
|
|
uniform float lampSizeUV; // 0.55
|
|
uniform float lampNear; // 0.5
|
|
#endif
|
|
#endif
|
|
|
|
// #ifdef _LTC
|
|
// uniform sampler2D sltcMat;
|
|
// uniform sampler2D sltcMag;
|
|
// uniform float time;
|
|
// const float roughness = 0.25;
|
|
// const vec3 dcolor = vec3(1.0, 1.0, 1.0);
|
|
// const vec3 scolor = vec3(1.0, 1.0, 1.0);
|
|
// const float intensity = 4.0; // 0-10
|
|
// const float width = 4.0;
|
|
// const float height = 4.0;
|
|
// const int sampleCount = 0;
|
|
// const int NUM_SAMPLES = 8;
|
|
// const float LUT_SIZE = 64.0;
|
|
// const float LUT_SCALE = (LUT_SIZE - 1.0)/LUT_SIZE;
|
|
// const float LUT_BIAS = 0.5/LUT_SIZE;
|
|
// vec2 mys[NUM_SAMPLES];
|
|
// vec3 L0 = vec3(0.0);
|
|
// vec3 L1 = vec3(0.0);
|
|
// vec3 L2 = vec3(0.0);
|
|
// vec3 L3 = vec3(0.0);
|
|
// vec3 L4 = vec3(0.0);
|
|
// #endif
|
|
|
|
uniform mat4 invVP;
|
|
uniform mat4 LWVP;
|
|
uniform vec3 lightPos;
|
|
uniform vec3 lightDir;
|
|
uniform int lightType;
|
|
// uniform int lightIndex;
|
|
uniform vec3 lightColor;
|
|
uniform float lightStrength;
|
|
uniform float shadowsBias;
|
|
uniform float spotlightCutoff;
|
|
uniform float spotlightExponent;
|
|
uniform vec3 eye;
|
|
// uniform vec3 eyeLook;
|
|
// uniform vec2 screenSize;
|
|
|
|
// in vec2 texCoord;
|
|
in vec4 wvpposition;
|
|
// in vec3 viewRay;
|
|
out vec4 outColor;
|
|
|
|
// Separable SSS Transmittance Function, ref to sss_pass
|
|
#ifdef _SSS
|
|
vec3 SSSSTransmittance(float translucency, float sssWidth, vec3 worldPosition, vec3 worldNormal, vec3 lightDir) {
|
|
float scale = 8.25 * (1.0 - translucency) / sssWidth;
|
|
vec4 shrinkedPos = vec4(worldPosition - 0.005 * worldNormal, 1.0);
|
|
vec4 shadowPosition = LWVP * shrinkedPos;
|
|
float d1 = texture(shadowMap, shadowPosition.xy / shadowPosition.w).r; // 'd1' has a range of 0..1
|
|
float d2 = shadowPosition.z; // 'd2' has a range of 0..'lightFarPlane'
|
|
const float lightFarPlane = 120 / 3.5;
|
|
d1 *= lightFarPlane; // So we scale 'd1' accordingly:
|
|
float d = scale * abs(d1 - d2);
|
|
|
|
float dd = -d * d;
|
|
vec3 profile = vec3(0.233, 0.455, 0.649) * exp(dd / 0.0064) +
|
|
vec3(0.1, 0.336, 0.344) * exp(dd / 0.0484) +
|
|
vec3(0.118, 0.198, 0.0) * exp(dd / 0.187) +
|
|
vec3(0.113, 0.007, 0.007) * exp(dd / 0.567) +
|
|
vec3(0.358, 0.004, 0.0) * exp(dd / 1.99) +
|
|
vec3(0.078, 0.0, 0.0) * exp(dd / 7.41);
|
|
return profile * clamp(0.3 + dot(lightDir, -worldNormal), 0.0, 1.0);
|
|
}
|
|
#endif
|
|
|
|
// #ifdef _Rad
|
|
// float getMipLevelFromRoughness(float roughness) {
|
|
// // First mipmap level = roughness 0, last = roughness = 1
|
|
// // baseColor texture already counted
|
|
// return roughness * envmapNumMipmaps;
|
|
// }
|
|
// #endif
|
|
|
|
vec3 surfaceAlbedo(vec3 baseColor, float metalness) {
|
|
return mix(baseColor, vec3(0.0), metalness);
|
|
}
|
|
|
|
vec3 surfaceF0(vec3 baseColor, float metalness) {
|
|
return mix(vec3(0.04), baseColor, metalness);
|
|
}
|
|
|
|
vec3 f_schlick(vec3 f0, float vh) {
|
|
return f0 + (1.0 - f0) * exp2((-5.55473 * vh - 6.98316) * vh);
|
|
}
|
|
|
|
float v_smithschlick(float nl, float nv, float a) {
|
|
return 1.0 / ((nl * (1.0 - a) + a) * (nv * (1.0 - a) + a) );
|
|
}
|
|
|
|
float d_ggx(float nh, float a) {
|
|
float a2 = a * a;
|
|
float denom = pow(nh * nh * (a2 - 1.0) + 1.0, 2.0);
|
|
return a2 * (1.0 / 3.1415926535) / denom;
|
|
}
|
|
|
|
vec3 specularBRDF(vec3 f0, float roughness, float nl, float nh, float nv, float vh) {
|
|
float a = roughness * roughness;
|
|
return d_ggx(nh, a) * clamp(v_smithschlick(nl, nv, a), 0.0, 1.0) * f_schlick(f0, vh) / 4.0;
|
|
}
|
|
// Gotanda 2012, Beyond a Simple Physically Based Blinn-Phong Model in Real-Time
|
|
// http://research.tri-ace.com/Data/s2012_beyond_CourseNotes.pdf
|
|
vec3 orenNayarDiffuseBRDF(vec3 albedo, float roughness, float nv, float nl, float vh) {
|
|
float a = roughness * roughness;
|
|
float s = a;
|
|
float s2 = s * s;
|
|
float vl = 2.0 * vh * vh - 1.0; // Double angle identity
|
|
float Cosri = vl - nv * nl;
|
|
float C1 = 1.0 - 0.5 * s2 / (s2 + 0.33);
|
|
float test = 1.0;
|
|
if (Cosri >= 0.0) test = (1.0 / (max(nl, nv)));
|
|
float C2 = 0.45 * s2 / (s2 + 0.09) * Cosri * test;
|
|
return albedo * max(0.0, nl) * (C1 + C2) * (1.0 + roughness * 0.5);
|
|
}
|
|
vec3 lambertDiffuseBRDF(vec3 albedo, float nl) {
|
|
return albedo * max(0.0, nl);
|
|
}
|
|
|
|
#ifndef _NoShadows
|
|
#ifndef _PCSS
|
|
float texture2DCompare(vec2 uv, float compare){
|
|
float depth = texture(shadowMap, uv).r;// * 2.0 - 1.0; // - mult compare instead
|
|
return step(compare, depth);
|
|
}
|
|
float texture2DShadowLerp(vec2 uv, float compare){
|
|
const vec2 texelSize = vec2(1.0) / shadowmapSize;
|
|
vec2 f = fract(uv * shadowmapSize + 0.5);
|
|
vec2 centroidUV = floor(uv * shadowmapSize + 0.5) / shadowmapSize;
|
|
float lb = texture2DCompare(centroidUV, compare);
|
|
float lt = texture2DCompare(centroidUV + texelSize * vec2(0.0, 1.0), compare);
|
|
float rb = texture2DCompare(centroidUV + texelSize * vec2(1.0, 0.0), compare);
|
|
float rt = texture2DCompare(centroidUV + texelSize, compare);
|
|
float a = mix(lb, lt, f.y);
|
|
float b = mix(rb, rt, f.y);
|
|
float c = mix(a, b, f.x);
|
|
return c;
|
|
}
|
|
float PCF(vec2 uv, float compare) {
|
|
// float result = 0.0;
|
|
// for (int x = -1; x <= 1; x++){
|
|
// for(int y = -1; y <= 1; y++){
|
|
// vec2 off = vec2(x, y) / shadowmapSize;
|
|
// result += texture2DShadowLerp(shadowmapSize, uv + off, compare);
|
|
compare = compare * 0.5 + 0.5;
|
|
float result = texture2DShadowLerp(uv + (vec2(-1.0, -1.0) / shadowmapSize), compare);
|
|
result += texture2DShadowLerp(uv + (vec2(-1.0, 0.0) / shadowmapSize), compare);
|
|
result += texture2DShadowLerp(uv + (vec2(-1.0, 1.0) / shadowmapSize), compare);
|
|
result += texture2DShadowLerp(uv + (vec2(0.0, -1.0) / shadowmapSize), compare);
|
|
result += texture2DShadowLerp(uv, compare);
|
|
result += texture2DShadowLerp(uv + (vec2(0.0, 1.0) / shadowmapSize), compare);
|
|
result += texture2DShadowLerp(uv + (vec2(1.0, -1.0) / shadowmapSize), compare);
|
|
result += texture2DShadowLerp(uv + (vec2(1.0, 0.0) / shadowmapSize), compare);
|
|
result += texture2DShadowLerp(uv + (vec2(1.0, 1.0) / shadowmapSize), compare);
|
|
// }
|
|
// }
|
|
return result / 9.0;
|
|
}
|
|
#else // _PCSS
|
|
// Based on ThreeJS and nvidia pcss
|
|
// const int pcssRings = 11;
|
|
const int NUM_SAMPLES = 17;
|
|
const float radiusStep = 1.0 / float(NUM_SAMPLES);
|
|
const float angleStep = PI2 * float(pcssRings) / float(NUM_SAMPLES);
|
|
vec2 poissonDisk0; vec2 poissonDisk1; vec2 poissonDisk2;
|
|
vec2 poissonDisk3; vec2 poissonDisk4; vec2 poissonDisk5;
|
|
vec2 poissonDisk6; vec2 poissonDisk7; vec2 poissonDisk8;
|
|
vec2 poissonDisk9; vec2 poissonDisk10; vec2 poissonDisk11;
|
|
vec2 poissonDisk12; vec2 poissonDisk13; vec2 poissonDisk14;
|
|
vec2 poissonDisk15; vec2 poissonDisk16;
|
|
void initPoissonSamples(const in vec2 randomSeed) {
|
|
float angle = texture(snoise, randomSeed).r * PI2;
|
|
float radius = radiusStep;
|
|
// for (int i = 0; i < NUM_SAMPLES; i++) {
|
|
poissonDisk0 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
|
|
radius += radiusStep; angle += angleStep;
|
|
poissonDisk1 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
|
|
radius += radiusStep; angle += angleStep;
|
|
poissonDisk2 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
|
|
radius += radiusStep; angle += angleStep;
|
|
poissonDisk3 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
|
|
radius += radiusStep; angle += angleStep;
|
|
poissonDisk4 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
|
|
radius += radiusStep; angle += angleStep;
|
|
poissonDisk5 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
|
|
radius += radiusStep; angle += angleStep;
|
|
poissonDisk6 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
|
|
radius += radiusStep; angle += angleStep;
|
|
poissonDisk7 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
|
|
radius += radiusStep; angle += angleStep;
|
|
poissonDisk8 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
|
|
radius += radiusStep; angle += angleStep;
|
|
poissonDisk9 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
|
|
radius += radiusStep; angle += angleStep;
|
|
poissonDisk10 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
|
|
radius += radiusStep; angle += angleStep;
|
|
poissonDisk11 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
|
|
radius += radiusStep; angle += angleStep;
|
|
poissonDisk12 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
|
|
radius += radiusStep; angle += angleStep;
|
|
poissonDisk13 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
|
|
radius += radiusStep; angle += angleStep;
|
|
poissonDisk14 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
|
|
radius += radiusStep; angle += angleStep;
|
|
poissonDisk15 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
|
|
radius += radiusStep; angle += angleStep;
|
|
poissonDisk16 = vec2(cos(angle), sin(angle)) * pow(radius, 0.75);
|
|
radius += radiusStep; angle += angleStep;
|
|
// }
|
|
}
|
|
float findBlocker(const in vec2 uv, const in float zReceiver) {
|
|
// This uses similar triangles to compute what area of the shadow map we should search
|
|
float searchRadius = lampSizeUV * (zReceiver - lampNear) / zReceiver;
|
|
float blockerDepthSum = 0.0;
|
|
int numBlockers = 0;
|
|
// for (int i = 0; i < NUM_SAMPLES; i++) {
|
|
float shadowMapDepth = texture(shadowMap, uv + poissonDisk0 * searchRadius).r * 2.0 - 1.0;
|
|
if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
|
|
shadowMapDepth = texture(shadowMap, uv + poissonDisk1 * searchRadius).r * 2.0 - 1.0;
|
|
if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
|
|
shadowMapDepth = texture(shadowMap, uv + poissonDisk2 * searchRadius).r * 2.0 - 1.0;
|
|
if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
|
|
shadowMapDepth = texture(shadowMap, uv + poissonDisk3 * searchRadius).r * 2.0 - 1.0;
|
|
if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
|
|
shadowMapDepth = texture(shadowMap, uv + poissonDisk4 * searchRadius).r * 2.0 - 1.0;
|
|
if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
|
|
shadowMapDepth = texture(shadowMap, uv + poissonDisk5 * searchRadius).r * 2.0 - 1.0;
|
|
if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
|
|
shadowMapDepth = texture(shadowMap, uv + poissonDisk6 * searchRadius).r * 2.0 - 1.0;
|
|
if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
|
|
shadowMapDepth = texture(shadowMap, uv + poissonDisk7 * searchRadius).r * 2.0 - 1.0;
|
|
if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
|
|
shadowMapDepth = texture(shadowMap, uv + poissonDisk8 * searchRadius).r * 2.0 - 1.0;
|
|
if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
|
|
shadowMapDepth = texture(shadowMap, uv + poissonDisk9 * searchRadius).r * 2.0 - 1.0;
|
|
if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
|
|
shadowMapDepth = texture(shadowMap, uv + poissonDisk10 * searchRadius).r * 2.0 - 1.0;
|
|
if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
|
|
shadowMapDepth = texture(shadowMap, uv + poissonDisk11 * searchRadius).r * 2.0 - 1.0;
|
|
if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
|
|
shadowMapDepth = texture(shadowMap, uv + poissonDisk12 * searchRadius).r * 2.0 - 1.0;
|
|
if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
|
|
shadowMapDepth = texture(shadowMap, uv + poissonDisk13 * searchRadius).r * 2.0 - 1.0;
|
|
if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
|
|
shadowMapDepth = texture(shadowMap, uv + poissonDisk14 * searchRadius).r * 2.0 - 1.0;
|
|
if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
|
|
shadowMapDepth = texture(shadowMap, uv + poissonDisk15 * searchRadius).r * 2.0 - 1.0;
|
|
if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
|
|
shadowMapDepth = texture(shadowMap, uv + poissonDisk16 * searchRadius).r * 2.0 - 1.0;
|
|
if (shadowMapDepth < zReceiver) { blockerDepthSum += shadowMapDepth; numBlockers++; }
|
|
// }
|
|
if (numBlockers == 0) return -1.0;
|
|
return blockerDepthSum / float(numBlockers);
|
|
}
|
|
float filterPCF(vec2 uv, float zReceiver, float filterRadius) {
|
|
float sum = 0.0;
|
|
// for (int i = 0; i < NUM_SAMPLES; i++) {
|
|
float depth = texture(shadowMap, uv + poissonDisk0 * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + poissonDisk1 * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + poissonDisk2 * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + poissonDisk3 * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + poissonDisk4 * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + poissonDisk5 * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + poissonDisk6 * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + poissonDisk7 * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + poissonDisk8 * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + poissonDisk9 * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + poissonDisk10 * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + poissonDisk11 * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + poissonDisk12 * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + poissonDisk13 * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + poissonDisk14 * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + poissonDisk15 * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + poissonDisk16 * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
// }
|
|
// for (int i = 0; i < NUM_SAMPLES; i++) {
|
|
depth = texture(shadowMap, uv + -poissonDisk0.yx * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + -poissonDisk1.yx * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + -poissonDisk2.yx * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + -poissonDisk3.yx * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + -poissonDisk4.yx * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
depth = texture(shadowMap, uv + -poissonDisk5.yx * filterRadius).r * 2.0 - 1.0;
|
|
if (zReceiver <= depth) sum += 1.0;
|
|
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);
|
|
float avgBlockerDepth = findBlocker(uv, zReceiver);
|
|
if (avgBlockerDepth == -1.0) return 1.0;
|
|
float penumbraRatio = (zReceiver - avgBlockerDepth) / avgBlockerDepth;
|
|
float filterRadius = penumbraRatio * lampSizeUV * lampNear / zReceiver;
|
|
return filterPCF(uv, zReceiver, filterRadius);
|
|
}
|
|
#endif
|
|
float shadowTest(vec4 lPos) {
|
|
vec4 lPosH = lPos / lPos.w;
|
|
lPosH.x = lPosH.x * 0.5 + 0.5;
|
|
lPosH.y = lPosH.y * 0.5 + 0.5;
|
|
#ifdef _PCSS
|
|
return PCSS(lPosH.xy, lPosH.z - shadowsBias);
|
|
#else
|
|
return PCF(lPosH.xy, lPosH.z - shadowsBias);
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
// vec2 envMapEquirect(vec3 normal) {
|
|
// float phi = acos(normal.z);
|
|
// float theta = atan(-normal.y, normal.x) + PI;
|
|
// return vec2(theta / PI2, phi / PI);
|
|
// }
|
|
|
|
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) {
|
|
// 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 * 0.5 + 0.5 - projectionA);
|
|
// float viewZDist = dot(eyeLook, vray);
|
|
// vec3 wposition = eye + vray * (linearDepth / viewZDist);
|
|
// return wposition;
|
|
// }
|
|
vec3 getPos(float depth, vec2 coord) {
|
|
vec4 pos = vec4(coord * 2.0 - 1.0, depth, 1.0);
|
|
pos = invVP * pos;
|
|
pos.xyz /= pos.w;
|
|
return pos.xyz;// - eye;
|
|
}
|
|
|
|
vec2 unpackFloat(float f) {
|
|
return vec2(floor(f) / 1000.0, fract(f));
|
|
}
|
|
|
|
// 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.y * nor.y - (-nor.z) * (-nor.z)) +
|
|
// c3 * cl20 * nor.x * nor.x +
|
|
// c4 * cl00 -
|
|
// c5 * cl20 +
|
|
// 2.0 * c1 * cl2m2 * nor.y * (-nor.z) +
|
|
// 2.0 * c1 * cl21 * nor.y * nor.x +
|
|
// 2.0 * c1 * cl2m1 * (-nor.z) * nor.x +
|
|
// 2.0 * c2 * cl11 * nor.y +
|
|
// 2.0 * c2 * cl1m1 * (-nor.z) +
|
|
// 2.0 * c2 * cl10 * nor.x
|
|
// ) * scale;
|
|
// }
|
|
|
|
void main() {
|
|
vec2 screenPosition = wvpposition.xy / wvpposition.w;
|
|
vec2 texCoord = screenPosition * 0.5 + 0.5;
|
|
// texCoord += vec2(0.5 / screenSize); // Half pixel offset
|
|
|
|
float depth = texture(gbufferD, texCoord).r * 2.0 - 1.0;
|
|
vec4 g0 = texture(gbuffer0, texCoord); // Normal.xy, metallic/roughness, mask
|
|
vec4 g1 = texture(gbuffer1, texCoord); // Basecolor.rgb, occlusion
|
|
|
|
vec3 n;
|
|
n.z = 1.0 - abs(g0.x) - abs(g0.y);
|
|
n.xy = n.z >= 0.0 ? g0.xy : octahedronWrap(g0.xy);
|
|
n = normalize(n);
|
|
|
|
vec3 p = getPos(depth, texCoord);
|
|
// vec3 p = getPos(depth);
|
|
vec2 metrough = unpackFloat(g0.b);
|
|
|
|
vec3 v = normalize(eye - p.xyz);
|
|
float dotNV = dot(n, v);
|
|
|
|
vec3 albedo = surfaceAlbedo(g1.rgb, metrough.x); // g1.rgb - basecolor
|
|
vec3 f0 = surfaceF0(g1.rgb, metrough.x);
|
|
|
|
// 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 = dot(n, h);
|
|
float dotVH = dot(v, h);
|
|
float dotNL = dot(n, l);
|
|
// float dotLV = dot(l, v);
|
|
// float dotLH = dot(l, h);
|
|
|
|
float visibility = 1.0;
|
|
#ifndef _NoShadows
|
|
vec4 lPos = LWVP * vec4(p, 1.0);
|
|
if (lPos.w > 0.0) {
|
|
visibility = shadowTest(lPos);
|
|
}
|
|
#endif
|
|
|
|
// Direct
|
|
#ifdef _OrenNayar
|
|
vec3 direct = orenNayarDiffuseBRDF(albedo, metrough.y, dotNV, dotNL, dotVH) + specularBRDF(f0, metrough.y, dotNL, dotNH, dotNV, dotVH);
|
|
#else
|
|
vec3 direct = lambertDiffuseBRDF(albedo, dotNL) + specularBRDF(f0, metrough.y, dotNL, dotNH, dotNV, dotVH);
|
|
#endif
|
|
|
|
if (lightType == 2) { // Spot
|
|
float spotEffect = dot(lightDir, l);
|
|
if (spotEffect < spotlightCutoff) {
|
|
float spotEffect = smoothstep(spotlightCutoff - spotlightExponent, spotlightCutoff, spotEffect);
|
|
direct *= spotEffect;
|
|
}
|
|
}
|
|
|
|
// Aniso spec
|
|
// float shinyParallel = metrough.y;
|
|
// float shinyPerpendicular = 0.08;
|
|
// vec3 fiberDirection = vec3(0.0, 1.0, 8.0);
|
|
// vec3 direct = diffuseBRDF(albedo, metrough.y, 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 *= SSSSTransmittance(1.0, 0.005, p, n, l);
|
|
}
|
|
#endif
|
|
|
|
// Direct
|
|
outColor = vec4(vec3(direct * visibility), 1.0);
|
|
|
|
// Indirect
|
|
// if (lightIndex == 0) {
|
|
// #ifdef _Probes
|
|
// float probeFactor = mask;
|
|
// float probeID = floor(probeFactor);
|
|
// float probeFract = fract(probeFactor);
|
|
// vec3 indirect;
|
|
// #ifdef _Rad
|
|
// float lod = getMipLevelFromRoughness(metrough.y);
|
|
// vec3 reflectionWorld = reflect(-v, n);
|
|
// vec2 envCoordRefl = envMapEquirect(reflectionWorld);
|
|
// vec3 prefilteredColor = textureLod(senvmapRadiance, envCoordRefl, lod).rgb;
|
|
// #endif
|
|
|
|
// // Global probe only
|
|
// if (probeID == 0.0) {
|
|
// indirect = shIrradiance(n, 2.2, 0) / PI;
|
|
// }
|
|
// // fract 0 = local probe, 1 = global probe
|
|
// else if (probeID == 1.0) {
|
|
// indirect = (shIrradiance(n, 2.2, 1) / PI) * (1.0 - probeFract);
|
|
// //prefilteredColor /= 4.0;
|
|
// if (probeFract > 0.0) {
|
|
// indirect += (shIrradiance(n, 2.2, 0) / PI) * (probeFract);
|
|
// }
|
|
// }
|
|
// #else // No probes
|
|
// // vec3 indirect = texture(shirr, envMapEquirect(n)).rgb;
|
|
// vec3 indirect = shIrradiance(n, 2.2) / PI;
|
|
// #ifdef _Rad
|
|
// vec3 reflectionWorld = reflect(-v, n);
|
|
// float lod = getMipLevelFromRoughness(metrough.y);
|
|
// vec3 prefilteredColor = textureLod(senvmapRadiance, envMapEquirect(reflectionWorld), lod).rgb;
|
|
// #endif
|
|
// #endif
|
|
|
|
// #ifdef _EnvLDR
|
|
// indirect = pow(indirect, vec3(2.2));
|
|
// #ifdef _Rad
|
|
// prefilteredColor = pow(prefilteredColor, vec3(2.2));
|
|
// #endif
|
|
// #endif
|
|
// indirect *= albedo;
|
|
|
|
// #ifdef _Rad
|
|
// // Indirect specular
|
|
// vec2 envBRDF = texture(senvmapBrdf, vec2(metrough.y, 1.0 - dotNV)).xy;
|
|
// indirect += prefilteredColor * (f0 * envBRDF.x + envBRDF.y);;
|
|
// #endif
|
|
// indirect = indirect * envmapStrength;// * lightColor * lightStrength;
|
|
// indirect = indirect * g1.a; // Occlusion
|
|
// #ifdef _SSAO
|
|
// indirect *= texture(ssaotex, texCoord).r; // SSAO
|
|
// #endif
|
|
// gl_FragColor.rgb += indirect;
|
|
// }
|
|
|
|
// 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(metrough.y, 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);
|
|
}
|