birkeh/o3de
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Switch directional light to use the same reformulation as projected shadow and reduce to 16 bit float RT for perf

Browse Source
This commit is contained in:
mriegger
2021-07-01 09:02:02 -07:00
parent 7030f663f5
commit 346e294f60
4 changed files with 9 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Gems/Atom/Feature/Common/Assets/Passes/DepthExponentiation.pass
+1 -1
View File
@@ -54,7 +54,7 @@
"Attachment": "Depth"
},
"ImageDescriptor": {
"Format": "R32_FLOAT"
"Format": "R16_FLOAT"
}
}
],
Gems/Atom/Feature/Common/Assets/Passes/FilterDepthVertical.pass
+1 -1
View File
@@ -54,7 +54,7 @@
"Attachment": "Input"
},
"ImageDescriptor": {
"Format": "R32_FLOAT"
"Format": "R16_FLOAT"
}
}
],
Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/Shadow/DirectionalLightShadow.azsli
+6 -4
View File
@@ -356,8 +356,9 @@ float DirectionalLightShadow::GetVisibilityFromLightEsm()
{
const float distanceWithinCameraView = depthDiff / (1. - distanceMin);
const float3 coord = float3(shadowCoord.xy, indexOfCascade);
const float expDepthInShadowmap = expShadowmap.Sample(PassSrg::LinearSampler, coord).r;
const float ratio = exp(-EsmExponentialShift * distanceWithinCameraView) * expDepthInShadowmap;
const float occluder = expShadowmap.Sample(PassSrg::LinearSampler, coord).r;
const float exponent = -EsmExponentialShift * (distanceWithinCameraView - occluder);
const float ratio = exp(exponent);
m_debugInfo.m_cascadeIndex = indexOfCascade;
return saturate(ratio);
@@ -385,8 +386,9 @@ float DirectionalLightShadow::GetVisibilityFromLightEsmPcf()
{
const float distanceWithinCameraView = depthDiff / (1. - distanceMin);
const float3 coord = float3(shadowCoord.xy, indexOfCascade);
const float expDepthInShadowmap = expShadowmap.Sample(PassSrg::LinearSampler, coord).r;
float ratio = exp(-EsmExponentialShift * distanceWithinCameraView) * expDepthInShadowmap;
const float occluder = expShadowmap.Sample(PassSrg::LinearSampler, coord).r;
const float exponent = -EsmExponentialShift * (distanceWithinCameraView - occluder);
float ratio = exp(exponent);
static const float pcfFallbackThreshold = 1.04;
if (ratio > pcfFallbackThreshold)
Gems/Atom/Feature/Common/Assets/Shaders/Shadow/DepthExponentiation.azsl
+1 -6
View File
@@ -63,12 +63,7 @@ void MainCS(uint3 dispatchId: SV_DispatchThreadID)
// So this converts it to "depth" to emphasize the difference
// within the frustum.
const float depth = (depthInClip - distanceMin) / (1. - distanceMin);
// Todo: Expose Esm exponent slider for directional lights
// This would remove the exp calculation below, collapsing it into a subtraction in DirectionalLightShadow.azsli
// ATOM-15775
const float outValue = exp(EsmExponentialShift * depth);
PassSrg::m_outputShadowmap[dispatchId].r = outValue;
PassSrg::m_outputShadowmap[dispatchId].r = depth;
break;
}
case ShadowmapLightType::Spot: