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Some cleanup

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This commit is contained in:
Olivier Prat 2018-09-17 16:12:54 +02:00
parent d9e2c8df69
commit d0eef1b8d0
2 changed files with 60 additions and 58 deletions
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4
libraries/render-utils/src/AmbientOcclusionEffect.cpp
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@ -80,11 +80,11 @@ void AmbientOcclusionFramebuffer::allocate() {
auto height = _frameSize.y;
auto format = gpu::Element::COLOR_RGBA_32;
_occlusionTexture = gpu::Texture::createRenderBuffer(format, width, height, gpu::Texture::SINGLE_MIP, gpu::Sampler(gpu::Sampler::FILTER_MIN_MAG_LINEAR_MIP_POINT));
_occlusionTexture = gpu::Texture::createRenderBuffer(format, width, height, gpu::Texture::SINGLE_MIP, gpu::Sampler(gpu::Sampler::FILTER_MIN_MAG_LINEAR_MIP_POINT, gpu::Sampler::WRAP_CLAMP));
_occlusionFramebuffer = gpu::FramebufferPointer(gpu::Framebuffer::create("occlusion"));
_occlusionFramebuffer->setRenderBuffer(0, _occlusionTexture);
_occlusionBlurredTexture = gpu::Texture::createRenderBuffer(format, width, height, gpu::Texture::SINGLE_MIP, gpu::Sampler(gpu::Sampler::FILTER_MIN_MAG_LINEAR_MIP_POINT));
_occlusionBlurredTexture = gpu::Texture::createRenderBuffer(format, width, height, gpu::Texture::SINGLE_MIP, gpu::Sampler(gpu::Sampler::FILTER_MIN_MAG_LINEAR_MIP_POINT, gpu::Sampler::WRAP_CLAMP));
_occlusionBlurredFramebuffer = gpu::FramebufferPointer(gpu::Framebuffer::create("occlusionBlurred"));
_occlusionBlurredFramebuffer->setRenderBuffer(0, _occlusionBlurredTexture);
}

114
libraries/render-utils/src/ssao.slh
View file

@ -293,66 +293,29 @@ float evalVisibilitySSAO(in vec3 centerPosition, in vec3 centerNormal, in vec3 t
float computeHorizonFromTap(vec3 tapPositionES, vec3 fragPositionES, vec3 fragNormalES) {
vec3 deltaVec = tapPositionES - fragPositionES;
float distanceSquared = dot(deltaVec, deltaVec);
float rawHorizon = dot(normalize(deltaVec), fragNormalES);
float radiusFalloff = distanceSquared / getRadius2();
float horizon = dot(normalize(deltaVec), fragNormalES);
float radiusFalloff = max(0.0, 1.0 - (distanceSquared / getRadius2()));
rawHorizon = max(0.0, (rawHorizon - getFalloffAngle()) / (1.0 - getFalloffAngle()));
rawHorizon *= max(0.0, 1.0 - radiusFalloff);
horizon = max(0.0, (horizon - getFalloffAngle()) / (1.0 - getFalloffAngle()));
horizon *= radiusFalloff;
return rawHorizon;
return horizon;
}
<@func computeHorizon()@>
vec3 tap = vec3(tapPixelPos, radius);
vec4 tapUVZ_mip = fetchTap(side, centerPixelPos, tap, imageSize);
vec3 tapPositionES = evalEyePositionFromZeye(side.x, tapUVZ_mip.z, tapUVZ_mip.xy);
float rawHorizon = computeHorizonFromTap(tapPositionES, fragPositionES, fragNormalES);
float tapCosHorizonAngle = computeHorizonFromTap(tapPositionES, fragPositionES, fragNormalES);
<$horizon$> = max(<$horizon$>, rawHorizon);
cosHorizonAngle = max(cosHorizonAngle, tapCosHorizonAngle);
<@endfunc@>
#define SSAO_LINEAR_SAMPLING 1
<@func updateHorizon(horizon, deltaPixelTap)@>
{
vec2 deltaPixelTap = clampedSearchVec / float(stepCount);
float searchRadius = length(clampedSearchVec);
float deltaRadius = searchRadius / float(stepCount);
vec2 tapPixelPos = vec2(0);
#if !SSAO_LINEAR_SAMPLING
float radius = deltaRadius;
float mipLevel = evalMipFromRadius(radius * float(doFetchMips()));
while (radius<searchRadius) {
tapPixelPos += <$deltaPixelTap$>;
<$computeHorizon()$>
if (tapUVZ_mip.w != mipLevel) {
mipLevel = tapUVZ_mip.w;
deltaRadius *= 2;
<$deltaPixelTap$> *= 2;
}
radius += deltaRadius;
}
#else
float radius = 0.0;
int stepIndex;
for (stepIndex=0 ; stepIndex<stepCount ; stepIndex++) {
tapPixelPos += <$deltaPixelTap$>;
radius += deltaRadius;
<$computeHorizon()$>
}
#endif
}
<@endfunc@>
vec2 clampSearchVec(vec2 imageSize, vec2 centerPixelPos, vec2 searchVec) {
vec2 clampdSearchVec = searchVec;
vec2 endPixel = centerPixelPos + clampdSearchVec;
/* TEMPO OP vec2 endPixel = centerPixelPos + clampdSearchVec;
if (endPixel.x < 0) {
clampdSearchVec = clampdSearchVec * ((0-centerPixelPos.x) / clampdSearchVec.x);
@ -368,11 +331,55 @@ vec2 clampSearchVec(vec2 imageSize, vec2 centerPixelPos, vec2 searchVec) {
}
if (endPixel.y >= imageSize.y) {
clampdSearchVec = clampdSearchVec * ((imageSize.y-1-centerPixelPos.y) / clampdSearchVec.y);
}
}*/
return clampdSearchVec;
}
float computeHorizon(ivec4 side, ivec2 centerPixelPos, vec2 imageSize, vec2 deltaTap, float ssDiskRadius,
vec3 fragPositionES, vec3 fragNormalES, vec2 clampedSearchVec) {
vec2 absClampedSearchVec = abs(clampedSearchVec);
int stepCount = int(max(absClampedSearchVec.x, absClampedSearchVec.y));
float cosHorizonAngle = 0.0;
if (stepCount>0) {
vec2 deltaPixelTap = clampedSearchVec / float(stepCount);
float searchRadius = length(clampedSearchVec);
float deltaRadius = searchRadius / float(stepCount);
vec2 tapPixelPos = vec2(0);
#if !SSAO_LINEAR_SAMPLING
float radius = deltaRadius;
float mipLevel = evalMipFromRadius(radius * float(doFetchMips()));
while (radius<searchRadius) {
tapPixelPos += deltaPixelTap;
<$computeHorizon()$>
if (tapUVZ_mip.w != mipLevel) {
mipLevel = tapUVZ_mip.w;
deltaRadius *= 2;
deltaPixelTap *= 2;
}
radius += deltaRadius;
}
#else
float radius = 0.0;
int stepIndex;
for (stepIndex=0 ; stepIndex<stepCount ; stepIndex++) {
tapPixelPos += deltaPixelTap;
radius += deltaRadius;
<$computeHorizon()$>
}
#endif
}
return cosHorizonAngle;
}
vec2 searchHorizons(ivec4 side, ivec2 centerPixelPos, vec2 imageSize, vec2 deltaTap, float ssDiskRadius,
vec3 fragPositionES, vec3 fragNormalES) {
vec2 searchVec = deltaTap * ssDiskRadius;
@ -380,18 +387,13 @@ vec2 searchHorizons(ivec4 side, ivec2 centerPixelPos, vec2 imageSize, vec2 delta
// Forward search for h1
vec2 clampedSearchVec = clampSearchVec(imageSize, vec2(centerPixelPos), searchVec);
vec2 absClampedSearchVec = abs(clampedSearchVec);
int stepCount = int(max(absClampedSearchVec.x, absClampedSearchVec.y));
if (stepCount>0) {
<$updateHorizon(horizons.x, deltaPixelTap)$>
}
horizons.x = computeHorizon(side, centerPixelPos, imageSize, deltaTap, ssDiskRadius,
fragPositionES, fragNormalES, clampedSearchVec);
// Backward search for h2
clampedSearchVec = clampSearchVec(imageSize, vec2(centerPixelPos), -searchVec);
absClampedSearchVec = abs(clampedSearchVec);
stepCount = int(max(absClampedSearchVec.x, absClampedSearchVec.y));
if (stepCount>0) {
<$updateHorizon(horizons.y, deltaPixelTap)$>
}
horizons.y = computeHorizon(side, centerPixelPos, imageSize, deltaTap, ssDiskRadius,
fragPositionES, fragNormalES, clampedSearchVec);
return horizons;
}