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Tweaked bias once more

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This commit is contained in:
Olivier Prat 2017-12-06 12:07:30 +01:00
parent ff39558d27
commit 89b1ef2e19
2 changed files with 4 additions and 4 deletions
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6
libraries/render-utils/src/LightStage.cpp
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@ -114,7 +114,7 @@ void LightStage::Shadow::setMaxDistance(float value) {
} else { } else {
// Distribute the cascades along that distance // Distribute the cascades along that distance
// TODO : these parameters should be exposed to the user as part of the light entity parameters, no? // TODO : these parameters should be exposed to the user as part of the light entity parameters, no?
static const auto LOW_MAX_DISTANCE = 2.0f; static const auto LOW_MAX_DISTANCE = 1.5f;
static const auto MAX_RESOLUTION_LOSS = 0.6f; // Between 0 and 1, 0 giving tighter distributions static const auto MAX_RESOLUTION_LOSS = 0.6f; // Between 0 and 1, 0 giving tighter distributions
// The max cascade distance is computed by multiplying the previous cascade's max distance by a certain // The max cascade distance is computed by multiplying the previous cascade's max distance by a certain
@ -214,7 +214,7 @@ void LightStage::Shadow::setKeylightFrustum(unsigned int cascadeIndex, const Vie
fitFrustum(farCorners.topLeft); fitFrustum(farCorners.topLeft);
fitFrustum(farCorners.topRight); fitFrustum(farCorners.topRight);
// Re-adjust near shadow distance // Re-adjust near and far shadow distance
auto near = glm::min(-max.z, nearDepth); auto near = glm::min(-max.z, nearDepth);
auto far = cascade.computeFarDistance(viewFrustum, shadowViewInverse, min.x, max.x, min.y, max.y, viewMaxShadowDistance); auto far = cascade.computeFarDistance(viewFrustum, shadowViewInverse, min.x, max.x, min.y, max.y, viewMaxShadowDistance);
@ -229,7 +229,7 @@ void LightStage::Shadow::setKeylightFrustum(unsigned int cascadeIndex, const Vie
schema.cascades[cascadeIndex].reprojection = _biasMatrix * ortho * shadowViewInverse.getMatrix(); schema.cascades[cascadeIndex].reprojection = _biasMatrix * ortho * shadowViewInverse.getMatrix();
// Adapt shadow bias to shadow resolution with a totally empirical formula // Adapt shadow bias to shadow resolution with a totally empirical formula
const auto maxShadowFrustumDim = std::max(fabsf(min.x - max.x), fabsf(min.y - max.y)); const auto maxShadowFrustumDim = std::max(fabsf(min.x - max.x), fabsf(min.y - max.y));
const auto REFERENCE_TEXEL_DENSITY = 20.0f; const auto REFERENCE_TEXEL_DENSITY = 10.0f;
const auto cascadeTexelDensity = MAP_SIZE / maxShadowFrustumDim; const auto cascadeTexelDensity = MAP_SIZE / maxShadowFrustumDim;
schema.cascades[cascadeIndex].bias = MAX_BIAS * std::min(1.0f, REFERENCE_TEXEL_DENSITY / cascadeTexelDensity); schema.cascades[cascadeIndex].bias = MAX_BIAS * std::min(1.0f, REFERENCE_TEXEL_DENSITY / cascadeTexelDensity);
} }

2
libraries/render-utils/src/LightStage.h
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@ -118,7 +118,7 @@ public:
Index findLight(const LightPointer& light) const; Index findLight(const LightPointer& light) const;
Index addLight(const LightPointer& light); Index addLight(const LightPointer& light);
Index addShadow(Index lightIndex, float maxDistance = 20.0f, unsigned int cascadeCount = 1U); Index addShadow(Index lightIndex, float maxDistance = 16.0f, unsigned int cascadeCount = 1U);
LightPointer removeLight(Index index); LightPointer removeLight(Index index);