mirror of
https://github.com/X0nk/Bliss-Shader.git
synced 2024-12-23 01:59:39 +08:00
545 lines
18 KiB
GLSL
545 lines
18 KiB
GLSL
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uniform sampler2D gaux1;
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uniform int framemod8;
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const vec2[8] offsets = vec2[8](vec2(1./8.,-3./8.),
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vec2(-1.,3.)/8.,
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vec2(5.0,1.)/8.,
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vec2(-3,-5.)/8.,
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vec2(-5.,5.)/8.,
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vec2(-7.,-1.)/8.,
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vec2(3,7.)/8.,
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vec2(7.,-7.)/8.);
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vec3 mix_vec3(vec3 X, vec3 Y, float A){
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return X * (1.0 - A) + Y * A;
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}
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float mix_float(float X, float Y, float A){
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return X * (1.0 - A) + Y * A;
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}
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float square(float x){
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return x*x;
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}
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// other shit
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float invLinZ (float lindepth){
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return -((2.0*near/lindepth)-far-near)/(far-near);
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}
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vec3 toClipSpace3(vec3 viewSpacePosition) {
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return projMAD(gbufferProjection, viewSpacePosition) / -viewSpacePosition.z * 0.5 + 0.5;
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}
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float linZ(float depth) {
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return (2.0 * near) / (far + near - depth * (far - near));
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// l = (2*n)/(f+n-d(f-n))
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// f+n-d(f-n) = 2n/l
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// -d(f-n) = ((2n/l)-f-n)
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// d = -((2n/l)-f-n)/(f-n)
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}
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void frisvad(in vec3 n, out vec3 f, out vec3 r){
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if(n.z < -0.9) {
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f = vec3(0.,-1,0);
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r = vec3(-1, 0, 0);
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} else {
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float a = 1./(1.+n.z);
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float b = -n.x*n.y*a;
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f = vec3(1. - n.x*n.x*a, b, -n.x) ;
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r = vec3(b, 1. - n.y*n.y*a , -n.y);
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}
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}
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mat3 CoordBase(vec3 n){
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vec3 x,y;
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frisvad(n,x,y);
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return mat3(x,y,n);
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}
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float unpackRoughness(float x){
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float r = 1.0 - x;
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return clamp(r*r,0,1);
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}
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vec2 R2_samples_spec(int n){
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vec2 alpha = vec2(0.75487765, 0.56984026);
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return fract(alpha * n);
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}
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vec3 rayTrace_GI(vec3 dir,vec3 position,float dither, float quality){
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vec3 clipPosition = toClipSpace3(position);
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float rayLength = ((position.z + dir.z * far*sqrt(3.)) > -near) ?
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(-near -position.z) / dir.z : far*sqrt(3.);
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vec3 direction = normalize(toClipSpace3(position+dir*rayLength)-clipPosition); //convert to clip space
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direction.xy = normalize(direction.xy);
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//get at which length the ray intersects with the edge of the screen
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vec3 maxLengths = (step(0.,direction)-clipPosition) / direction;
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float mult = maxLengths.y;
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vec3 stepv = direction * mult / quality*vec3(RENDER_SCALE,1.0) * dither;
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vec3 spos = clipPosition*vec3(RENDER_SCALE,1.0) ;
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spos.xy += TAA_Offset*texelSize*0.5/RENDER_SCALE;
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float biasdist = clamp(position.z*position.z/50.0,1,2); // shrink sample size as distance increases
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for(int i = 0; i < int(quality); i++){
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spos += stepv;
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float sp = sqrt(texelFetch2D(colortex4,ivec2(spos.xy/texelSize/4),0).w/65000.0);
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float currZ = linZ(spos.z);
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if( sp < currZ) {
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float dist = abs(sp-currZ)/currZ;
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if (abs(dist) < biasdist*0.05) return vec3(spos.xy, invLinZ(sp))/vec3(RENDER_SCALE,1.0);
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}
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spos += stepv;
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}
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return vec3(1.1);
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}
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vec3 rayTraceSpeculars(vec3 dir,vec3 position,float dither, float quality, bool hand, inout float reflectLength){
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vec3 clipPosition = toClipSpace3(position);
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float rayLength = ((position.z + dir.z * far*sqrt(3.)) > -near) ?
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(-near -position.z) / dir.z : far*sqrt(3.);
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vec3 direction = normalize(toClipSpace3(position+dir*rayLength)-clipPosition); //convert to clip space
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direction.xy = normalize(direction.xy);
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//get at which length the ray intersects with the edge of the screen
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vec3 maxLengths = (step(0.,direction)-clipPosition) / direction;
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float mult = min(min(maxLengths.x,maxLengths.y),maxLengths.z);
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vec3 stepv = direction * mult / quality*vec3(RENDER_SCALE,1.0);
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vec3 spos = clipPosition*vec3(RENDER_SCALE,1.0) + stepv*dither;
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float minZ = spos.z;
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float maxZ = spos.z;
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spos.xy += TAA_Offset*texelSize*0.5/RENDER_SCALE;
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float depthcancleoffset = pow(1.0-(quality/reflection_quality),1);
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float dist = 1.0 + clamp(position.z*position.z/50.0,0,2); // shrink sample size as distance increases
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for (int i = 0; i <= int(quality); i++) {
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vec2 testthing = hand ? spos.xy*texelSize : spos.xy/texelSize/4.0; // fix for ssr on hand
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float sp = sqrt((texelFetch2D(colortex4,ivec2(testthing),0).a+0.1)/65000.0);
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sp = invLinZ(sp);
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if(sp <= max(maxZ,minZ) && sp >= min(maxZ,minZ) ) return vec3(spos.xy/RENDER_SCALE,sp);
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spos += stepv;
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//small bias
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float biasamount = (0.0002 + 0.0015*pow(depthcancleoffset,5) ) / dist;
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// float biasamount = 0.0002 / dist;
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if(hand) biasamount = 0.01;
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minZ = maxZ-biasamount / ld(spos.z);
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maxZ += stepv.z;
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reflectLength += 1.0 / quality; // for shit
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}
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return vec3(1.1);
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}
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// vec3 sampleGGXVNDF(vec3 V_, float roughness, float U1, float U2){
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// // stretch view
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// vec3 V = normalize(vec3(roughness * V_.x, roughness * V_.y, V_.z));
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// // orthonormal basis
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// vec3 T1 = (V.z < 0.9999) ? normalize(cross(V, vec3(0,0,1))) : vec3(1,0,0);
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// vec3 T2 = cross(T1, V);
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// // sample point with polar coordinates (r, phi)
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// float a = 1.0 / (1.0 + V.z);
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// float r = sqrt(U1*0.25);
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// float phi = (U2<a) ? U2/a * 3.141592653589793 : 3.141592653589793 + (U2-a)/(1.0-a) * 3.141592653589793;
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// float P1 = r*cos(phi);
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// float P2 = r*sin(phi)*((U2<a) ? 1.0 : V.z);
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// // compute normal
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// vec3 N = P1*T1 + P2*T2 + sqrt(max(0.0, 1.0 - P1*P1 - P2*P2))*V;
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// // unstretch
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// N = normalize(vec3(roughness*N.x, roughness*N.y, N.z));
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// return N;
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// }
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float xonk_fma(float a,float b,float c){
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return a * b + c;
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}
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//// thank you Zombye | the paper: https://ggx-research.github.io/publication/2023/06/09/publication-ggx.html
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vec3 SampleVNDFGGX(
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vec3 viewerDirection, // Direction pointing towards the viewer, oriented such that +Z corresponds to the surface normal
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vec2 alpha, // Roughness parameter along X and Y of the distribution
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vec2 xy // Pair of uniformly distributed numbers in [0, 1)
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) {
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// alpha *= alpha;
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// Transform viewer direction to the hemisphere configuration
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viewerDirection = normalize(vec3(alpha * viewerDirection.xy, viewerDirection.z));
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// Sample a reflection direction off the hemisphere
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const float tau = 6.2831853; // 2 * pi
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float phi = tau * xy.x;
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float cosTheta = xonk_fma(1.0 - xy.y, 1.0 + viewerDirection.z, -viewerDirection.z) ;
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float sinTheta = sqrt(clamp(1.0 - cosTheta * cosTheta, 0.0, 1.0));
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vec3 reflected = vec3(vec2(cos(phi), sin(phi)) * sinTheta, cosTheta);
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// Evaluate halfway direction
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// This gives the normal on the hemisphere
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// xonk note, i added those magic numbers huhuhuh
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vec3 halfway = reflected*0.5 + viewerDirection*1.5;
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// vec3 halfway = reflected + viewerDirection;
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// Transform the halfway direction back to hemiellispoid configuation
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// This gives the final sampled normal
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return normalize(vec3(alpha * halfway.xy, halfway.z));
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}
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vec3 GGX(vec3 n, vec3 v, vec3 l, float r, vec3 F0) {
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r = max(pow(r,2.5), 0.0001);
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vec3 h = l + v;
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float hn = inversesqrt(dot(h, h));
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float dotLH = clamp(dot(h,l)*hn,0.,1.);
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float dotNH = clamp(dot(h,n)*hn,0.,1.) ;
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float dotNL = clamp(dot(n,l),0.,1.);
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float dotNHsq = dotNH*dotNH;
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float denom = dotNHsq * r - dotNHsq + 1.;
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float D = r / (3.141592653589793 * denom * denom);
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vec3 F = F0 + (1. - F0) * exp2((-5.55473*dotLH-6.98316)*dotLH);
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float k2 = .25 * r;
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return dotNL * D * F / (dotLH*dotLH*(1.0-k2)+k2);
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}
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// pain
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void MaterialReflections(
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inout vec3 Output,
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float roughness,
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vec3 f0,
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vec3 albedo,
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vec3 sunPos,
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vec3 directlighting,
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float lightmap,
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vec3 normal,
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vec3 np3,
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vec3 fragpos,
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vec3 noise,
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bool hand,
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bool isEntities
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){
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vec3 Reflections_Final = Output;
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vec3 SkyReflection = Output;
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vec3 SunReflection = vec3(0.0);
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vec4 Reflections = vec4(0.0);
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float reflectLength;
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float Outdoors = clamp((lightmap-0.6)*5.0, 0.0,1.0);
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roughness = unpackRoughness(roughness);
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f0 = f0.y == 0.0 ? vec3(0.02) : f0;
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// f0 = vec3(0.9);
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// roughness = 0.0;
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mat3 basis = CoordBase(normal);
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vec3 normSpaceView = -np3*basis ;
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// roughness stuff
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#ifdef Rough_reflections
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int seed = frameCounter%40000;
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vec2 ij = fract(R2_samples_spec(seed) + noise.rg) ;
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vec3 H = SampleVNDFGGX(normSpaceView, vec2(roughness), ij.xy);
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if(hand) H = normalize(vec3(0.0,0.0,1.0));
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#else
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vec3 H = normalize(vec3(0.0,0.0,1.0));
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#endif
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vec3 Ln = reflect(-normSpaceView, H);
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vec3 L = basis * Ln;
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// fresnel stuff
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float fresnel = pow(clamp(1.0 + dot(-Ln, H),0.0,1.0),5.0);
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vec3 F = mix_vec3(f0, vec3(1.0), fresnel);
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vec3 rayContrib = F;
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float rayContribLuma = dot(rayContrib,vec3(0.333333));
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float VisibilityFactor = rayContribLuma * pow(1.0-roughness,3.0);
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bool hasReflections = Roughness_Threshold == 1.0 ? true : (f0.y * (1.0 - roughness * Roughness_Threshold)) > 0.01;
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SunReflection = directlighting * GGX(normal, -np3, sunPos, roughness, vec3(f0.y));
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#ifdef Sky_reflection
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if( Roughness_Threshold == 1.0 || (f0.y * (1.0 - roughness * Roughness_Threshold)) > 0.005) SkyReflection = pow(clamp(1.0-VisibilityFactor,0,1),0.3)*( skyCloudsFromTex(L, colortex4).rgb / 150. ) * 5.;
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#endif
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if (hasReflections) { // Skip sky reflection and SSR if its just not very visible anyway
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#ifdef Screen_Space_Reflections
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float rayQuality = mix_float(reflection_quality,6.0,rayContribLuma); // Scale quality with ray contribution
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#ifndef Dynamic_SSR_quality
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rayQuality = reflection_quality;
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#endif
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noise.b = mix_float(noise.b, 0.5 + (noise.b-0.5),rayContribLuma);
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if(hand) {rayQuality = max(rayQuality,30.0); noise.b = 0.5 + (noise.b-0.5);}
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vec3 rtPos = rayTraceSpeculars(mat3(gbufferModelView) * L, fragpos.xyz, (noise.b), rayQuality, hand, reflectLength);
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float LOD = clamp(reflectLength * 6.0, 0.0,6.0);
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if(hand || isEntities) LOD = VisibilityFactor*6;
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// LOD = 0.0;
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if (rtPos.z < 1.0) { // Reproject on previous frame
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vec3 previousPosition = mat3(gbufferModelViewInverse) * toScreenSpace(rtPos) + gbufferModelViewInverse[3].xyz + cameraPosition-previousCameraPosition;
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previousPosition = mat3(gbufferPreviousModelView) * previousPosition + gbufferPreviousModelView[3].xyz;
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previousPosition.xy = projMAD(gbufferPreviousProjection, previousPosition).xy / -previousPosition.z * 0.5 + 0.5;
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if (previousPosition.x > 0.0 && previousPosition.y > 0.0 && previousPosition.x < 1.0 && previousPosition.x < 1.0) {
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Reflections.a = 1.0;
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Reflections.rgb = texture2DLod(colortex5,previousPosition.xy,LOD).rgb;
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}
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}
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#endif
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}
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// check if the f0 is within the metal ranges, then tint by albedo if it's true.
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// // the brightening is disgusting
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// vec3 Metals = f0.y > 229.5/255.0 ? clamp((albedo / max(pow(luma(albedo),0.1),0.4)) + fresnel,0.0,1.0) : vec3(1.0);
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vec3 Metals = f0.y > 229.5/255.0 ? clamp(albedo + fresnel,0.0,1.0) : vec3(1.0);
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SunReflection *= Metals;
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#ifdef Sky_reflection
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SkyReflection *= Metals;
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#endif
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#ifdef Screen_Space_Reflections
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Reflections.rgb *= Metals;
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#endif
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// background reflections
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SkyReflection = mix_vec3(Output, SkyReflection, Outdoors);
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// composite background and SSR.
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Reflections.rgb = mix_vec3(SkyReflection, Reflections.rgb, Reflections.a);
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// put reflections onto the scene
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#ifdef Rough_reflections
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Output = hand ? mix_vec3(Output, Reflections.rgb, VisibilityFactor) : mix_vec3(Output, Reflections.rgb, rayContribLuma);
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#else
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Output = mix_vec3(Output, Reflections.rgb, VisibilityFactor);
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#endif
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Output += SunReflection;
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}
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void MaterialReflections_N(
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inout vec3 Output,
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float roughness,
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vec3 f0,
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vec3 albedo,
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vec3 normal,
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vec3 np3,
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vec3 fragpos,
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vec3 noise,
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bool hand
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){
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vec3 Reflections_Final = Output;
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float reflectLength = 0.0;
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roughness = unpackRoughness(roughness);
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f0 = f0.y == 0.0 ? vec3(0.02) : f0;
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// roughness = 0.0;
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// f0 = vec3(0.9);
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float visibilityFactor = clamp(exp2((pow(roughness,3.0) / f0.y) * -4),0,1);
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mat3 basis = CoordBase(normal);
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vec3 normSpaceView = -np3*basis ;
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// roughness stuff
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#ifdef Rough_reflections
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int seed = (frameCounter%40000);
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vec2 ij = fract(R2_samples_spec(seed) + noise.rg) ;
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vec3 H = SampleVNDFGGX(normSpaceView, vec2(roughness), ij.xy);
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if(hand) H = normalize(vec3(0.0,0.0,1.0));
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#else
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vec3 H = normalize(vec3(0.0,0.0,1.0));
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#endif
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vec3 Ln = reflect(-normSpaceView, H);
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vec3 L = basis * Ln;
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// fresnel stuff
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float fresnel = pow(clamp(1.0 + dot(-Ln, H),0.0,1.0),5.0);
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vec3 F = mix(f0, vec3(1.0), fresnel);
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vec3 rayContrib = F;
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// float NdotV = clamp(normalize(dot(np3, L))*10000.,0.,1.);
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bool hasReflections = (f0.y * (1.0 - roughness * Roughness_Threshold)) >= 0.0;
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if (Roughness_Threshold == 1.0){ hasReflections = true; }
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// SSR, Sky, and Sun reflections
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vec4 Reflections = vec4(0.0);
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vec3 FogReflection = vec3(0.0);
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#ifdef Screen_Space_Reflections
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if ( hasReflections ) { // Skip SSR if ray contribution is low
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float rayQuality = reflection_quality;
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vec3 rtPos = rayTraceSpeculars( mat3(gbufferModelView) * L,fragpos.xyz, noise.b, reflection_quality, hand, reflectLength);
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float LOD = clamp( reflectLength * 6.0 ,0.0,6.0);
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if (rtPos.z < 1. ){ // Reproject on previous frame
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vec3 previousPosition = mat3(gbufferModelViewInverse) * toScreenSpace(rtPos) + gbufferModelViewInverse[3].xyz + cameraPosition-previousCameraPosition;
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previousPosition = mat3(gbufferPreviousModelView) * previousPosition + gbufferPreviousModelView[3].xyz;
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previousPosition.xy = projMAD(gbufferPreviousProjection, previousPosition).xy / -previousPosition.z * 0.5 + 0.5;
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if (previousPosition.x > 0.0 && previousPosition.y > 0.0 && previousPosition.x < 1.0 && previousPosition.x < 1.0) {
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Reflections.a = 1.0;
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Reflections.rgb = texture2DLod(colortex5,previousPosition.xy,LOD).rgb;
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}
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}
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}
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#endif
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// check if the f0 is within the metal ranges, then tint by albedo if it's true.
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vec3 Metals = f0.y > 229.5/255.0 ? clamp(albedo + fresnel,0.0,1.0) : vec3(1.0);
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Reflections.rgb *= Metals;
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#ifdef Sky_reflection
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// reflect nether fog color instead of a sky.
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FogReflection = gl_Fog.color.rgb * 0.5 * NetherFog_brightness;
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FogReflection *= 1.0 + sqrt(roughness) * 15.0; // brighten rough spots for some highlights that look neat
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FogReflection *= Metals;
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FogReflection = mix(Output, FogReflection, pow(fresnel, 0.2)+0.1); // make sure the background contains the fog reflection.
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#else
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FogReflection = Output;
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#endif
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Reflections.rgb = mix(FogReflection, Reflections.rgb, Reflections.a); // make background only where ssr is not.
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Reflections_Final = mix(Output, Reflections.rgb, luma(rayContrib)); // apply reflections to final scene color.
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#ifdef Rough_reflections
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Output = hand ? mix_vec3(Output, Reflections_Final, visibilityFactor) : Reflections_Final;
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#else
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Output = mix_vec3(Output, Reflections_Final, visibilityFactor);
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#endif
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// Output = vec3(reflectLength);
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}
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void MaterialReflections_E(
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inout vec3 Output,
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float roughness,
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vec3 f0,
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vec3 albedo,
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vec3 normal,
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vec3 np3,
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vec3 fragpos,
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vec3 noise,
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bool hand,
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vec3 lightCol,
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vec3 lightDir,
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bool isEntities
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){
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vec3 Reflections_Final = Output;
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float reflectLength = 0.0;
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roughness = unpackRoughness(roughness);
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f0 = f0.y == 0.0 ? vec3(0.02) : f0;
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// roughness = 0.0;
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// f0 = vec3(0.9);
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float visibilityFactor = clamp(exp2((pow(roughness,3.0) / f0.y) * -4),0,1);
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mat3 basis = CoordBase(normal);
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vec3 normSpaceView = -np3*basis ;
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// roughness stuff
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#ifdef Rough_reflections
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int seed = (frameCounter%40000);
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vec2 ij = fract(R2_samples_spec(seed) + noise.rg) ;
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vec3 H = SampleVNDFGGX(normSpaceView, vec2(roughness), ij.xy);
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if(hand) H = normalize(vec3(0.0,0.0,1.0));
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#else
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vec3 H = normalize(vec3(0.0,0.0,1.0));
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#endif
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vec3 Ln = reflect(-normSpaceView, H);
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vec3 L = basis * Ln;
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// fresnel stuff
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float fresnel = pow(clamp(1.0 + dot(-Ln, H),0.0,1.0),5.0);
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vec3 F = mix(f0, vec3(1.0), fresnel);
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vec3 rayContrib = F;
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// float NdotV = clamp(normalize(dot(np3, L))*10000.,0.,1.);
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bool hasReflections = (f0.y * (1.0 - roughness * Roughness_Threshold)) >= 0.0;
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if (Roughness_Threshold == 1.0){ hasReflections = true; }
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|
|
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vec3 Ln_2 = reflect(-normSpaceView, normalize(vec3(0.0,0.0,1.0)));
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vec3 L_2 = basis * Ln_2;
|
|
|
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vec3 FogReflection = skyCloudsFromTexLOD(L_2, colortex4, sqrt(roughness) * 9.0).rgb / 150.0;
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FogReflection = mix(FogReflection, lightCol * 2 * clamp(dot(L_2, lightDir),0,1), roughness);
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|
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FogReflection *= 1.0 + roughness * 2.0;
|
|
vec4 Reflections = vec4(0.0);
|
|
|
|
#ifdef Screen_Space_Reflections
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if ( hasReflections ) { // Skip SSR if ray contribution is low
|
|
|
|
float rayQuality = reflection_quality;
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|
vec3 rtPos = rayTraceSpeculars( mat3(gbufferModelView) * L,fragpos.xyz, noise.b, reflection_quality, hand, reflectLength);
|
|
|
|
float LOD = clamp( reflectLength * 6.0 ,0.0,6.0);
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|
if(hand) LOD = 6.0;
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|
if(isEntities) LOD = 4.0;
|
|
|
|
if (rtPos.z < 1. ){ // Reproject on previous frame
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vec3 previousPosition = mat3(gbufferModelViewInverse) * toScreenSpace(rtPos) + gbufferModelViewInverse[3].xyz + cameraPosition-previousCameraPosition;
|
|
previousPosition = mat3(gbufferPreviousModelView) * previousPosition + gbufferPreviousModelView[3].xyz;
|
|
previousPosition.xy = projMAD(gbufferPreviousProjection, previousPosition).xy / -previousPosition.z * 0.5 + 0.5;
|
|
if (previousPosition.x > 0.0 && previousPosition.y > 0.0 && previousPosition.x < 1.0 && previousPosition.x < 1.0) {
|
|
Reflections.a = 1.0;
|
|
Reflections.rgb = texture2DLod(colortex5,previousPosition.xy,LOD).rgb;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
// check if the f0 is within the metal ranges, then tint by albedo if it's true.
|
|
vec3 Metals = f0.y > 229.5/255.0 ? clamp(albedo + fresnel,0.0,1.0) : vec3(1.0);
|
|
Reflections.rgb *= Metals;
|
|
FogReflection *= Metals;
|
|
|
|
Reflections.rgb = mix(FogReflection, Reflections.rgb, Reflections.a); // make background only where ssr is not.
|
|
Reflections_Final = mix(Output, Reflections.rgb, luma(rayContrib)); // apply reflections to final scene color.
|
|
|
|
#ifdef Rough_reflections
|
|
Output = hand ? mix_vec3(Output, Reflections_Final, visibilityFactor) : Reflections_Final;
|
|
#else
|
|
Output = mix_vec3(Output, Reflections_Final, visibilityFactor);
|
|
#endif
|
|
} |