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Optimized a bit by skipping layers when the blend weight is 0.

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This reduced frame time by about 2ms (from 12ms when parallax was off, and from 47ms when parallax was on).
This commit is contained in:
Chris Santora
2021-05-16 17:54:21 -07:00
parent 9683222ce7
commit c84578c37f
1 changed files with 17 additions and 5 deletions
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Gems/Atom/Feature/Common/Assets/Materials/Types/StandardMultilayerPBR_ForwardPass.azsl
+17 -5
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@@ -386,16 +386,22 @@ PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float
// ------- Layer 1 (base layer) -----------
ProcessedMaterialInputs lightingInputLayer1;
if(blendWeights.r > 0)
{
StandardMaterialInputs inputs;
FILL_STANDARD_MATERIAL_INPUTS(inputs, MaterialSrg::m_layer1_, o_layer1_, blendWeights.r)
lightingInputLayer1 = ProcessStandardMaterialInputs(inputs);
}
else
{
lightingInputLayer1.InitializeToZero();
blendWeights.r = 0;
}
// ----------- Layer 2 -----------
ProcessedMaterialInputs lightingInputLayer2;
if(o_layer2_enabled)
if(o_layer2_enabled && blendWeights.g > 0)
{
StandardMaterialInputs inputs;
FILL_STANDARD_MATERIAL_INPUTS(inputs, MaterialSrg::m_layer2_, o_layer2_, blendWeights.g)
@@ -404,12 +410,13 @@ PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float
else
{
lightingInputLayer2.InitializeToZero();
blendWeights.g = 0;
}
// ----------- Layer 3 -----------
ProcessedMaterialInputs lightingInputLayer3;
if(o_layer3_enabled)
if(o_layer3_enabled && blendWeights.b > 0)
{
StandardMaterialInputs inputs;
FILL_STANDARD_MATERIAL_INPUTS(inputs, MaterialSrg::m_layer3_, o_layer3_, blendWeights.b)
@@ -418,6 +425,7 @@ PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float
else
{
lightingInputLayer3.InitializeToZero();
blendWeights.b = 0;
}
// ------- Combine all layers ---------
@@ -428,12 +436,16 @@ PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float
// ------- Combine Normals ---------
float3 normalTS = lightingInputLayer1.m_normalTS;
if(o_layer2_enabled)
float3 normalTS = float3(0,0,1);
if(blendWeights.r > 0)
{
normalTS = lightingInputLayer1.m_normalTS;
}
if(o_layer2_enabled && blendWeights.g > 0)
{
normalTS = ReorientTangentSpaceNormal(normalTS, lightingInputLayer2.m_normalTS);
}
if(o_layer3_enabled)
if(o_layer3_enabled && blendWeights.b > 0)
{
normalTS = ReorientTangentSpaceNormal(normalTS, lightingInputLayer3.m_normalTS);
}