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PSSM Shadow Fix

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fixes the issue with pssm shadows were the softness value makes the shadow cast on the entire cascade.
This commit is contained in:
marauder2k7 2026-03-12 20:47:19 +00:00
parent 058983aa42
commit 6a8d832bd6
3 changed files with 143 additions and 98 deletions
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12
Engine/source/lighting/shadowMap/pssmLightShadowMap.cpp
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@ -191,6 +191,16 @@ void PSSMLightShadowMap::_roundProjection(const MatrixF& lightMat, const MatrixF
}
void PSSMLightShadowMap::_adjustScaleAndOffset(Box3F& clipAABB, Point3F& scale, Point3F& offset) {
const ShadowMapParams* params = mLight->getExtended<ShadowMapParams>();
F32 padding = params->shadowSoftness * (2.0f / (F32)mTexSize);
clipAABB.minExtents.x -= padding;
clipAABB.minExtents.y -= padding;
clipAABB.maxExtents.x += padding;
clipAABB.maxExtents.y += padding;
scale.x = 2.0f / (clipAABB.maxExtents.x - clipAABB.minExtents.x);
scale.y = 2.0f / (clipAABB.maxExtents.y - clipAABB.minExtents.y);
scale.z = 1.0f;
@ -469,7 +479,7 @@ void PSSMLightShadowMap::setShaderParameters(GFXShaderConstBuffer* params, Light
params->setSafe( lsc->mOverDarkFactorPSSM, p->overDarkFactor);
// The softness is a factor of the texel size.
params->setSafe( lsc->mShadowSoftnessConst, p->shadowSoftness * ( 1.0f / mTexSize ) );
params->setSafe( lsc->mShadowSoftnessConst, p->shadowSoftness * ( 2.0f / mTexSize ) );
}
void PSSMLightShadowMap::_calcPlanesCullForShadowCasters(Vector< Vector<PlaneF> > &out, const Frustum &viewFrustum, const Point3F &_ligthDir)