TorqueGameEngines/Torque3D
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cleanups and perf: only need to subtract the alpha post-blending, not pre and post, contribution>1 shouldn't happen, so max(result,0) suffices, and no need for a for-all-probes-loop if we already know ya only got one probe hitting the pixel under examination.

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Azaezel 2019-03-26 12:41:20 -05:00
parent 5703618dc0
commit 1d36cf05b0
1 changed files with 10 additions and 14 deletions
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24
Templates/Full/game/shaders/common/lighting/advanced/reflectionProbeArrayP.hlsl
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@ -202,34 +202,30 @@ float4 main(PFXVertToPix IN) : SV_TARGET
probehits++; probehits++;
} }
if (probes[i].contribution>1 || probes[i].contribution<0) probes[i].contribution = max(probes[i].contribution,0);
probes[i].contribution = 0;
blendSum += probes[i].contribution; blendSum += probes[i].contribution;
invBlendSum += (1.0f - probes[i].contribution); invBlendSum += (1.0f - probes[i].contribution);
alpha -= probes[i].contribution;
} }
// Weight0 = normalized NDF, inverted to have 1 at center, 0 at boundary. // Weight0 = normalized NDF, inverted to have 1 at center, 0 at boundary.
// And as we invert, we need to divide by Num-1 to stay normalized (else sum is > 1). // And as we invert, we need to divide by Num-1 to stay normalized (else sum is > 1).
// respect constraint B. // respect constraint B.
// Weight1 = normalized inverted NDF, so we have 1 at center, 0 at boundary // Weight1 = normalized inverted NDF, so we have 1 at center, 0 at boundary
// and respect constraint A. // and respect constraint A.
for (i = 0; i < numProbes; i++) if (probehits>1.0)
{ {
if (probehits>1.0) for (i = 0; i < numProbes; i++)
{ {
blendFactor[i] = ((probes[i].contribution / blendSum)) / (probehits - 1); blendFactor[i] = ((probes[i].contribution / blendSum)) / (probehits - 1);
blendFactor[i] *= ((probes[i].contribution) / invBlendSum); blendFactor[i] *= ((probes[i].contribution) / invBlendSum);
blendFacSum += blendFactor[i]; blendFacSum += blendFactor[i];
} }
else
{
blendFactor[i] = probes[i].contribution;
blendFacSum = probes[i].contribution;
}
} }
else
{
blendFactor[i] = probes[i].contribution;
blendFacSum = probes[i].contribution;
}
// Normalize blendVal // Normalize blendVal