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Update leenkx/Shaders/ssao_pass/ssao_pass.frag.glsl

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Onek8
2025-07-10 00:57:07 +00:00
parent c35c59e6a9
commit 2998a5585e
1 changed files with 69 additions and 4 deletions
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73
leenkx/Shaders/ssao_pass/ssao_pass.frag.glsl
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@ -45,12 +45,77 @@ void main() {
fragColor = 0;
const int samples = 8;
const float samplesInv = PI2 * (1.0 / samples);
for (int i = 0; i < samples; ++i) {
float theta = samplesInv * (i + 0.5) + phi;
const float samplesInv = PI2 * (1.0 / 8.0);
// Manually unrolled sampling loop for better performance on older hardware
// Sample 0
{
float theta = samplesInv * (0 + 0.5) + phi;
vec2 k = vec2(cos(theta), sin(theta)) / currentDistanceA;
depth = textureLod(gbufferD, texCoord + k, 0.0).r * 2.0 - 1.0;
vec3 pos = getPos2NoEye(eye, invVP, depth, texCoord + k) - currentPos;
fragColor += max(0, dot(pos, n) - currentDistanceB) / (dot(pos, pos) + 0.015);
}
// Sample 1
{
float theta = samplesInv * (1 + 0.5) + phi;
vec2 k = vec2(cos(theta), sin(theta)) / currentDistanceA;
depth = textureLod(gbufferD, texCoord + k, 0.0).r * 2.0 - 1.0;
vec3 pos = getPos2NoEye(eye, invVP, depth, texCoord + k) - currentPos;
fragColor += max(0, dot(pos, n) - currentDistanceB) / (dot(pos, pos) + 0.015);
}
// Sample 2
{
float theta = samplesInv * (2 + 0.5) + phi;
vec2 k = vec2(cos(theta), sin(theta)) / currentDistanceA;
depth = textureLod(gbufferD, texCoord + k, 0.0).r * 2.0 - 1.0;
vec3 pos = getPos2NoEye(eye, invVP, depth, texCoord + k) - currentPos;
fragColor += max(0, dot(pos, n) - currentDistanceB) / (dot(pos, pos) + 0.015);
}
// Sample 3
{
float theta = samplesInv * (3 + 0.5) + phi;
vec2 k = vec2(cos(theta), sin(theta)) / currentDistanceA;
depth = textureLod(gbufferD, texCoord + k, 0.0).r * 2.0 - 1.0;
vec3 pos = getPos2NoEye(eye, invVP, depth, texCoord + k) - currentPos;
fragColor += max(0, dot(pos, n) - currentDistanceB) / (dot(pos, pos) + 0.015);
}
// Sample 4
{
float theta = samplesInv * (4 + 0.5) + phi;
vec2 k = vec2(cos(theta), sin(theta)) / currentDistanceA;
depth = textureLod(gbufferD, texCoord + k, 0.0).r * 2.0 - 1.0;
vec3 pos = getPos2NoEye(eye, invVP, depth, texCoord + k) - currentPos;
fragColor += max(0, dot(pos, n) - currentDistanceB) / (dot(pos, pos) + 0.015);
}
// Sample 5
{
float theta = samplesInv * (5 + 0.5) + phi;
vec2 k = vec2(cos(theta), sin(theta)) / currentDistanceA;
depth = textureLod(gbufferD, texCoord + k, 0.0).r * 2.0 - 1.0;
vec3 pos = getPos2NoEye(eye, invVP, depth, texCoord + k) - currentPos;
fragColor += max(0, dot(pos, n) - currentDistanceB) / (dot(pos, pos) + 0.015);
}
// Sample 6
{
float theta = samplesInv * (6 + 0.5) + phi;
vec2 k = vec2(cos(theta), sin(theta)) / currentDistanceA;
depth = textureLod(gbufferD, texCoord + k, 0.0).r * 2.0 - 1.0;
vec3 pos = getPos2NoEye(eye, invVP, depth, texCoord + k) - currentPos;
fragColor += max(0, dot(pos, n) - currentDistanceB) / (dot(pos, pos) + 0.015);
}
// Sample 7
{
float theta = samplesInv * (7 + 0.5) + phi;
vec2 k = vec2(cos(theta), sin(theta)) / currentDistanceA;
depth = textureLod(gbufferD, texCoord + k, 0.0).r * 2.0 - 1.0;
// vec3 pos = getPosNoEye(eyeLook, vray, depth, cameraProj) - currentPos;
vec3 pos = getPos2NoEye(eye, invVP, depth, texCoord + k) - currentPos;
fragColor += max(0, dot(pos, n) - currentDistanceB) / (dot(pos, pos) + 0.015);
}