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Add objects culling in Global Surface Atlas

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This commit is contained in:
Wojciech Figat
2022-04-06 16:56:04 +02:00
parent 430ef09ab1
commit 49a67be419
5 changed files with 51 additions and 38 deletions
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33
Source/Engine/Renderer/GlobalSurfaceAtlasPass.cpp
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@@ -17,8 +17,7 @@
#include "Engine/Utilities/RectPack.h"
// This must match HLSL
#define GLOBAL_SURFACE_ATLAS_OBJECT_SIZE (1)
#define GLOBAL_SURFACE_ATLAS_OBJECT_STRIDE (16 * GLOBAL_SURFACE_ATLAS_OBJECT_SIZE)
#define GLOBAL_SURFACE_ATLAS_OBJECT_SIZE 5 // Amount of Vector4s per-object
#define GLOBAL_SURFACE_ATLAS_TILE_PADDING 1 // 1px padding to prevent color bleeding between tiles
#define GLOBAL_SURFACE_ATLAS_DEBUG_FORCE_TILES_REDRAW 0 // Forces to redraw all object tiles every frame
#define GLOBAL_SURFACE_ATLAS_DEBUG_FORCE_DRAW_OBJECTS 0 // Debug draws object bounds on redraw (and tile draw projection locations)
@@ -74,10 +73,16 @@ public:
GPUTexture* AtlasGBuffer1 = nullptr;
GPUTexture* AtlasGBuffer2 = nullptr;
GPUTexture* AtlasDirectLight = nullptr;
DynamicTypedBuffer ObjectsBuffer;
GlobalSurfaceAtlasPass::BindingData Result;
GlobalSurfaceAtlasTile* AtlasTiles = nullptr; // TODO: optimize with a single allocation for atlas tiles
Dictionary<Actor*, GlobalSurfaceAtlasObject> Objects;
GlobalSurfaceAtlasCustomBuffer()
: ObjectsBuffer(256 * GLOBAL_SURFACE_ATLAS_OBJECT_SIZE, PixelFormat::R32G32B32A32_Float, false, TEXT("GlobalSurfaceAtlas.ObjectsBuffer"))
{
}
FORCE_INLINE void Clear()
{
RenderTargetPool::Release(AtlasDepth);
@@ -86,6 +91,7 @@ public:
RenderTargetPool::Release(AtlasGBuffer2);
RenderTargetPool::Release(AtlasDirectLight);
SAFE_DELETE(AtlasTiles);
ObjectsBuffer.Clear();
Objects.Clear();
}
@@ -176,7 +182,6 @@ void GlobalSurfaceAtlasPass::Dispose()
// Cleanup
SAFE_DELETE(_vertexBuffer);
SAFE_DELETE(_objectsBuffer);
SAFE_DELETE_GPU_RESOURCE(_psClear);
SAFE_DELETE_GPU_RESOURCE(_psDebug);
_cb0 = nullptr;
@@ -232,10 +237,7 @@ bool GlobalSurfaceAtlasPass::Render(RenderContext& renderContext, GPUContext* co
_vertexBuffer = New<DynamicVertexBuffer>(0u, (uint32)sizeof(AtlasTileVertex), TEXT("GlobalSurfaceAtlas.VertexBuffer"));
// Add objects into the atlas
if (_objectsBuffer)
_objectsBuffer->Clear();
else
_objectsBuffer = New<DynamicTypedBuffer>(256 * GLOBAL_SURFACE_ATLAS_OBJECT_SIZE, PixelFormat::R32G32B32A32_Float, false, TEXT("GlobalSurfaceAtlas.ObjectsBuffer"));
surfaceAtlasData.ObjectsBuffer.Clear();
_dirtyObjectsBuffer.Clear();
{
PROFILE_CPU_NAMED("Draw");
@@ -245,7 +247,7 @@ bool GlobalSurfaceAtlasPass::Render(RenderContext& renderContext, GPUContext* co
const uint16 maxTileResolution = 128; // Maximum size (in texels) of the tile in atlas
const uint16 tileResolutionAlignment = 8; // Alignment to snap (down) tiles resolution which allows to reuse atlas slots once object gets resizes/replaced by other object
const float minObjectRadius = 20.0f; // Skip too small objects
const float tileTexelsPerWorldUnit = 1.0f / 20.0f; // Scales the tiles resolution
const float tileTexelsPerWorldUnit = 1.0f / 10.0f; // Scales the tiles resolution
const float distanceScalingStart = 2000.0f; // Distance from camera at which the tiles resolution starts to be scaled down
const float distanceScalingEnd = 5000.0f; // Distance from camera at which the tiles resolution end to be scaled down
const float distanceScaling = 0.1f; // The scale for tiles at distanceScalingEnd and further away
@@ -337,13 +339,17 @@ bool GlobalSurfaceAtlasPass::Render(RenderContext& renderContext, GPUContext* co
object->LastFrameDirty = currentFrame;
_dirtyObjectsBuffer.Add(ToPair(e.Actor, object));
}
// TODO: populate ObjectsBuffer with objects tiles data
// Write to objects buffer (this must match unpacking logic in HLSL)
Matrix worldToLocalBounds;
Matrix::Invert(object->Bounds.Transformation, worldToLocalBounds);
// TODO: cache data for static objects to optimize CPU perf (move ObjectsBuffer into surfaceAtlasData)
Vector4 objectData[GLOBAL_SURFACE_ATLAS_OBJECT_SIZE];
auto* objectData = surfaceAtlasData.ObjectsBuffer.WriteReserve<Vector4>(GLOBAL_SURFACE_ATLAS_OBJECT_SIZE);
objectData[0] = *(Vector4*)&e.Bounds;
_objectsBuffer->Write(objectData);
objectData[1] = Vector4(worldToLocalBounds.M11, worldToLocalBounds.M12, worldToLocalBounds.M13, worldToLocalBounds.M41);
objectData[2] = Vector4(worldToLocalBounds.M21, worldToLocalBounds.M22, worldToLocalBounds.M23, worldToLocalBounds.M42);
objectData[3] = Vector4(worldToLocalBounds.M31, worldToLocalBounds.M32, worldToLocalBounds.M33, worldToLocalBounds.M43);
objectData[4] = Vector4(object->Bounds.Extents, 0.0f);
}
}
}
@@ -369,8 +375,7 @@ bool GlobalSurfaceAtlasPass::Render(RenderContext& renderContext, GPUContext* co
// Send objects data to the GPU
{
PROFILE_GPU_CPU("Update Objects");
// TODO: cache objects data in surfaceAtlasData to reduce memory transfer
_objectsBuffer->Flush(context);
surfaceAtlasData.ObjectsBuffer.Flush(context);
}
// Rasterize world geometry material properties into Global Surface Atlas
@@ -532,6 +537,7 @@ bool GlobalSurfaceAtlasPass::Render(RenderContext& renderContext, GPUContext* co
result.Atlas[2] = surfaceAtlasData.AtlasGBuffer1;
result.Atlas[3] = surfaceAtlasData.AtlasGBuffer2;
result.Atlas[4] = surfaceAtlasData.AtlasDirectLight;
result.Objects = surfaceAtlasData.ObjectsBuffer.GetBuffer();
result.GlobalSurfaceAtlas.ObjectsCount = surfaceAtlasData.Objects.Count();
surfaceAtlasData.Result = result;
return false;
@@ -568,6 +574,7 @@ void GlobalSurfaceAtlasPass::RenderDebug(RenderContext& renderContext, GPUContex
context->BindSR(i + 4, bindingDataSDF.CascadeMips[i]->ViewVolume());
}
context->BindSR(8, bindingData.Atlas[1]->View()); // TODO: pass Atlas[4]=AtlasDirectLight
context->BindSR(9, bindingData.Objects ? bindingData.Objects->View() : nullptr);
context->SetState(_psDebug);
context->SetRenderTarget(output->View());
context->SetViewportAndScissors(outputSize.X, outputSize.Y);

2
Source/Engine/Renderer/GlobalSurfaceAtlasPass.h
View File

@@ -21,6 +21,7 @@ public:
struct BindingData
{
GPUTexture* Atlas[5];
GPUBuffer* Objects;
GlobalSurfaceAtlasData GlobalSurfaceAtlas;
};
@@ -33,7 +34,6 @@ private:
// Rasterization cache
class DynamicVertexBuffer* _vertexBuffer = nullptr;
class DynamicTypedBuffer* _objectsBuffer = nullptr;
Array<Pair<Actor*, struct GlobalSurfaceAtlasObject*>> _dirtyObjectsBuffer;
public: