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Adjusted cascade partitions

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This commit is contained in:
Olivier Prat 2017-11-14 18:53:50 +01:00
parent 74b0b52edb
commit d14ebdc0e1
3 changed files with 16 additions and 11 deletions
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1
libraries/render-utils/src/DebugDeferredBuffer.cpp
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@ -497,7 +497,6 @@ void DebugDeferredBuffer::run(const RenderContextPointer& renderContext, const I
const glm::vec2 topRight(_size.z, _size.w);
geometryBuffer->renderQuad(batch, bottomLeft, topRight, color, _geometryId);
batch.setResourceTexture(Albedo, nullptr);
batch.setResourceTexture(Normal, nullptr);
batch.setResourceTexture(Specular, nullptr);

21
libraries/render-utils/src/RenderShadowTask.cpp
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@ -260,16 +260,23 @@ void RenderShadowSetup::run(const render::RenderContextPointer& renderContext, O
const auto farClip = args->getViewFrustum().getFarClip();
const auto nearDepth = -args->_boomOffset.z;
static const float SHADOW_MAX_DISTANCE = 30.0f;
static const float CASCADE_LEVEL_SCALE = 2.0f;
float maxCascadeDistance = SHADOW_MAX_DISTANCE / powf(CASCADE_LEVEL_SCALE, globalShadow->getCascadeCount() - 1 - _cascadeIndex);
float minCascadeDistance = maxCascadeDistance / CASCADE_LEVEL_SCALE;
float shadowOverlapDistance = (maxCascadeDistance - minCascadeDistance) / 3.0f;
static const float HIGH_CASCADE_MAX_DISTANCE = 20.0f;
float maxCascadeDistance = HIGH_CASCADE_MAX_DISTANCE;
float minCascadeDistance = nearClip;
float shadowOverlapDistance = 0.0f;
if (globalShadow->getCascadeCount() > 1) {
static const float LOW_CASCADE_MAX_DISTANCE = 2.0f;
const float cascadeLevelScale = powf(HIGH_CASCADE_MAX_DISTANCE / LOW_CASCADE_MAX_DISTANCE, 1.0f / (globalShadow->getCascadeCount() - 1));
maxCascadeDistance = HIGH_CASCADE_MAX_DISTANCE / powf(cascadeLevelScale, globalShadow->getCascadeCount() - 1 - _cascadeIndex);
minCascadeDistance = maxCascadeDistance / cascadeLevelScale;
}
shadowOverlapDistance = (maxCascadeDistance - minCascadeDistance) / 3.0f;
maxCascadeDistance += shadowOverlapDistance;
if (_cascadeIndex == 0) {
minCascadeDistance = nearDepth;
} else {
minCascadeDistance -= shadowOverlapDistance;
}
minCascadeDistance = std::max(minCascadeDistance, nearDepth);
maxCascadeDistance = std::min(maxCascadeDistance, farClip);

5
libraries/render-utils/src/ShadowCore.slh
View file

@ -43,10 +43,9 @@ float getShadowBias(int cascadeIndex) {
// Compute the texture coordinates from world coordinates
vec4 evalShadowTexcoord(int cascadeIndex, vec4 position) {
float bias = -getShadowBias(cascadeIndex);
vec4 shadowCoord = getShadowReprojection(cascadeIndex) * position;
return vec4(shadowCoord.xy, shadowCoord.z + bias, 1.0);
float bias = getShadowBias(cascadeIndex);
return vec4(shadowCoord.xy, shadowCoord.z - bias, 1.0);
}
int getFirstValidShadowTexcoord(vec4 cascadeShadowCoords[4]) {