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Add improvements to Volumetric Fog quality and performance

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This commit is contained in:
Wojtek Figat
2026-01-27 22:20:48 +01:00
parent d47bd5d6e7
commit f9b784a42a
16 changed files with 249 additions and 191 deletions
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2
Source/Engine/Graphics/Materials/MaterialShader.h
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@@ -10,7 +10,7 @@
/// <summary>
/// Current materials shader version.
/// </summary>
#define MATERIAL_GRAPH_VERSION 180
#define MATERIAL_GRAPH_VERSION 181
class Material;
class GPUShader;

3
Source/Engine/Graphics/Materials/VolumeParticleMaterialShader.cpp
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@@ -25,6 +25,8 @@ PACK_STRUCT(struct VolumeParticleMaterialShaderData {
float VolumetricFogMaxDistance;
int32 ParticleStride;
int32 ParticleIndex;
Float3 GridSliceParameters;
float Dummy1;
});
DrawPass VolumeParticleMaterialShader::GetDrawModes() const
@@ -86,6 +88,7 @@ void VolumeParticleMaterialShader::Bind(BindParameters& params)
materialData->VolumetricFogMaxDistance = customData->VolumetricFogMaxDistance;
materialData->ParticleStride = drawCall.Particle.Particles->Stride;
materialData->ParticleIndex = customData->ParticleIndex;
materialData->GridSliceParameters = customData->GridSliceParameters;
}
// Bind constants

14
Source/Engine/Graphics/RenderTools.cpp
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@@ -630,6 +630,20 @@ void RenderTools::ComputeBoxModelDrawMatrix(const RenderView& view, const Orient
resultIsViewInside = box.Contains(view.Position) == ContainmentType::Contains;
}
float RenderTools::TemporalHalton(int32 index, int32 base)
{
float result = 0.0f;
const float invBase = 1.0f / (float)base;
float fraction = invBase;
while (index > 0)
{
result += float(index % base) * fraction;
index /= base;
fraction *= invBase;
}
return result;
}
Float2 RenderTools::GetDepthBounds(const RenderView& view, const Float3& nearPoint, const Float3& farPoint)
{
// Point closest the view

2
Source/Engine/Graphics/RenderTools.h
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@@ -148,6 +148,8 @@ public:
static void ComputeSphereModelDrawMatrix(const RenderView& view, const Float3& position, float radius, Matrix& resultWorld, bool& resultIsViewInside);
static void ComputeBoxModelDrawMatrix(const RenderView& view, const OrientedBoundingBox& box, Matrix& resultWorld, bool& resultIsViewInside);
static float TemporalHalton(int32 index, int32 base);
// Calculates depth bounds to optimize drawing with depth buffer to cover only specific range of depth. Returns min and max depth (as Float2) to pass into GPUContext::SetDepthBounds.
static Float2 GetDepthBounds(const RenderView& view, const Float3& nearPoint, const Float3& farPoint);
static Float2 GetDepthBounds(const RenderView& view, const BoundingSphere& bounds);

6
Source/Engine/Graphics/RenderView.cpp
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@@ -5,9 +5,9 @@
#include "Engine/Level/Actors/Camera.h"
#include "Engine/Core/Math/Double4x4.h"
#include "Engine/Renderer/RenderList.h"
#include "Engine/Renderer/RendererPass.h"
#include "RenderBuffers.h"
#include "RenderTask.h"
#include "RenderTools.h"
void RenderView::Prepare(RenderContext& renderContext)
{
@@ -29,8 +29,8 @@ void RenderView::Prepare(RenderContext& renderContext)
// Calculate jitter
const float jitterSpread = renderContext.List->Settings.AntiAliasing.TAA_JitterSpread;
const float jitterX = (RendererUtils::TemporalHalton(TaaFrameIndex + 1, 2) - 0.5f) * jitterSpread;
const float jitterY = (RendererUtils::TemporalHalton(TaaFrameIndex + 1, 3) - 0.5f) * jitterSpread;
const float jitterX = (RenderTools::TemporalHalton(TaaFrameIndex + 1, 2) - 0.5f) * jitterSpread;
const float jitterY = (RenderTools::TemporalHalton(TaaFrameIndex + 1, 3) - 0.5f) * jitterSpread;
taaJitter = Float2(jitterX * 2.0f / width, jitterY * 2.0f / height);
// Modify projection matrix