232 lines
6.8 KiB
GLSL
Executable file
232 lines
6.8 KiB
GLSL
Executable file
#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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#include "../std/math.glsl"
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// rand()
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#include "../std/gbuffer.glsl"
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// octahedronWrap()
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// unpackFloat()
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uniform sampler2D tex;
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uniform sampler2D gbufferD;
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uniform sampler2D gbuffer0; // Normal, roughness
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uniform mat4 P;
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uniform mat4 tiV;
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// const int maxSteps = 20;
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// const int numBinarySearchSteps = 5;
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// const float ssrRayStep = 0.04;
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// const float ssrMinRayStep = 0.05;
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// const float ssrSearchDist = 5.0;
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// const float ssrFalloffExp = 5.0;
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// const float ssrJitter = 0.6;
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in vec3 viewRay;
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in vec2 texCoord;
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out vec4 fragColor;
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vec3 hitCoord;
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float depth;
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vec4 getProjectedCoord(vec3 hitCoord) {
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vec4 projectedCoord = P * vec4(hitCoord, 1.0);
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projectedCoord.xy /= projectedCoord.w;
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projectedCoord.xy = projectedCoord.xy * 0.5 + 0.5;
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return projectedCoord;
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}
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float getDeltaDepth(vec3 hitCoord) {
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// depth = 1.0 - texture(gbuffer0, getProjectedCoord(hitCoord).xy).a;
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depth = texture(gbufferD, getProjectedCoord(hitCoord).xy).r * 2.0 - 1.0;
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vec3 viewPos = getPosView(viewRay, depth);
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return viewPos.z - hitCoord.z;
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}
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vec4 binarySearch(vec3 dir) {
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// for (int i = 0; i < numBinarySearchSteps; i++) {
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dir *= 0.5;
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hitCoord -= dir;
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if (getDeltaDepth(hitCoord) < 0.0) hitCoord += dir;
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dir *= 0.5;
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hitCoord -= dir;
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if (getDeltaDepth(hitCoord) < 0.0) hitCoord += dir;
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dir *= 0.5;
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hitCoord -= dir;
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if (getDeltaDepth(hitCoord) < 0.0) hitCoord += dir;
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dir *= 0.5;
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hitCoord -= dir;
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if (getDeltaDepth(hitCoord) < 0.0) hitCoord += dir;
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dir *= 0.5;
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hitCoord -= dir;
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if (getDeltaDepth(hitCoord) < 0.0) hitCoord += dir;
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dir *= 0.5;
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hitCoord -= dir;
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if (getDeltaDepth(hitCoord) < 0.0) hitCoord += dir;
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dir *= 0.5;
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hitCoord -= dir;
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if (getDeltaDepth(hitCoord) < 0.0) hitCoord += dir;
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////
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// dir *= 0.5;
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// hitCoord -= dir;
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// if (getDeltaDepth(hitCoord) < 0.0) hitCoord += dir;
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// dir *= 0.5;
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// hitCoord -= dir;
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// if (getDeltaDepth(hitCoord) < 0.0) hitCoord += dir;
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// dir *= 0.5;
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// hitCoord -= dir;
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// if (getDeltaDepth(hitCoord) < 0.0) hitCoord += dir;
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// dir *= 0.5;
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// hitCoord -= dir;
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// if (getDeltaDepth(hitCoord) < 0.0) hitCoord += dir;
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// dir *= 0.5;
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// hitCoord -= dir;
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// if (getDeltaDepth(hitCoord) < 0.0) hitCoord += dir;
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// dir *= 0.5;
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// hitCoord -= dir;
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// if (getDeltaDepth(hitCoord) < 0.0) hitCoord += dir;
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// Ugly discard of hits too far away
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if (abs(getDeltaDepth(hitCoord)) > 0.01) {
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return vec4(0.0);
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}
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// }
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return vec4(getProjectedCoord(hitCoord).xy, 0.0, 1.0);
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}
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vec4 rayCast(vec3 dir) {
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dir *= ssrRayStep;
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// for (int i = 0; i < maxSteps; i++) {
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hitCoord += dir;
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if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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hitCoord += dir;
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if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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hitCoord += dir;
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if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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hitCoord += dir;
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if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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hitCoord += dir;
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if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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hitCoord += dir;
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if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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hitCoord += dir;
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if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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hitCoord += dir;
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if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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hitCoord += dir;
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if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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hitCoord += dir;
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if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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hitCoord += dir;
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if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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hitCoord += dir;
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if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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hitCoord += dir;
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if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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hitCoord += dir;
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if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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hitCoord += dir;
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if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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hitCoord += dir;
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if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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hitCoord += dir;
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if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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hitCoord += dir;
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if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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////
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// hitCoord += dir;
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// if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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// hitCoord += dir;
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// if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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// hitCoord += dir;
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// if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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// hitCoord += dir;
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// if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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// hitCoord += dir;
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// if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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// hitCoord += dir;
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// if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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// hitCoord += dir;
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// if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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// hitCoord += dir;
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// if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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// hitCoord += dir;
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// if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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// hitCoord += dir;
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// if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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// hitCoord += dir;
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// if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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// hitCoord += dir;
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// if (getDeltaDepth(hitCoord) > 0.0) return binarySearch(dir);
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// }
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return vec4(0.0, 0.0, 0.0, 0.0);
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}
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void main() {
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vec4 g0 = texture(gbuffer0, texCoord);
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float roughness = unpackFloat(g0.b).y;
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if (roughness == 1.0) {
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fragColor = vec4(0.0);
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return;
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}
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float reflectivity = 1.0 - roughness;
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float d = texture(gbufferD, texCoord).r * 2.0 - 1.0;
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if (d == 1.0) {
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fragColor = vec4(0.0);
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return;
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}
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vec2 enc = g0.rg;
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vec3 n;
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n.z = 1.0 - abs(enc.x) - abs(enc.y);
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n.xy = n.z >= 0.0 ? enc.xy : octahedronWrap(enc.xy);
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n = normalize(n);
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vec4 viewNormal = vec4(n, 1.0);
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if (viewNormal.z <= 0.9) {
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fragColor = vec4(0.0);
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return; // Only up facing surfaces for now
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}
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viewNormal = tiV * normalize(viewNormal);
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vec3 viewPos = getPosView(viewRay, d);
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vec3 reflected = normalize(reflect((viewPos.xyz), normalize(viewNormal.xyz)));
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hitCoord = viewPos.xyz;
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vec3 dir = reflected * max(ssrMinRayStep, -viewPos.z) * (1.0 - rand(texCoord) * ssrJitter * roughness);
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vec4 coords = rayCast(dir);
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vec2 deltaCoords = abs(vec2(0.5, 0.5) - coords.xy);
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float screenEdgeFactor = clamp(1.0 - (deltaCoords.x + deltaCoords.y), 0.0, 1.0);
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float intensity = pow(reflectivity, ssrFalloffExp) *
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screenEdgeFactor * clamp(-reflected.z, 0.0, 1.0) *
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clamp((ssrSearchDist - length(viewPos.xyz - hitCoord)) * (1.0 / ssrSearchDist), 0.0, 1.0) * coords.w;
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// vec4 texColor = texture(tex, texCoord);
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// float brightness = dot(texColor.rgb, vec3(0.2126, 0.7152, 0.0722));
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// intensity *= min(brightness, 1.0);
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intensity = clamp(intensity, 0.0, 1.0);
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if (intensity == 0.0) {
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fragColor = vec4(0.0);
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return;
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}
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vec4 reflCol = vec4(texture(tex, coords.xy).rgb, 1.0);
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reflCol = clamp(reflCol, 0.0, 1.0);
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// fragColor = texColor * (1.0 - intensity) + reflCol * intensity;
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fragColor = reflCol * intensity * 0.5; //
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}
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