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52b54ca696
Remove unused param from ComposeHeightfieldsIntoPagesCS. Added const keyword to GetHeightfieldRepresentation(...) Remove TexCreate_RenderTargetable flag from VisualizeDistanceField texture since it is only used as UAV. #fyi daniel.wright #preflight 6202bbbd121599bf437e90a7 [CL 18906762 by tiago costa in ue5-main branch]
84 lines
3.5 KiB
C++
84 lines
3.5 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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/*=============================================================================
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HeightfieldLighting.cpp
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=============================================================================*/
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#include "HeightfieldLighting.h"
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#include "StaticBoundShaderState.h"
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#include "SceneUtils.h"
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#include "Materials/Material.h"
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#include "GlobalShader.h"
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#include "MaterialShaderType.h"
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#include "MaterialShader.h"
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#include "DistanceFieldLightingShared.h"
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#include "ScreenRendering.h"
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#include "DistanceFieldAmbientOcclusion.h"
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#include "LightRendering.h"
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#include "PipelineStateCache.h"
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// In float4's, must match usf
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static const int32 HEIGHTFIELD_DATA_STRIDE = 10;
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void FillHeightfieldDescriptionData(const TArray<FHeightfieldComponentDescription>& HeightfieldDescriptions, TArray<FVector4f, SceneRenderingAllocator>& HeightfieldDescriptionData)
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{
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HeightfieldDescriptionData.Empty(HeightfieldDescriptions.Num() * HEIGHTFIELD_DATA_STRIDE);
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for (int32 DescriptionIndex = 0; DescriptionIndex < HeightfieldDescriptions.Num(); DescriptionIndex++)
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{
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const FHeightfieldComponentDescription& Description = HeightfieldDescriptions[DescriptionIndex];
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FVector4f HeightfieldScaleBias = Description.HeightfieldScaleBias;
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check(HeightfieldScaleBias.X > 0);
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// CalculateHeightfieldOcclusionCS needs to be fixed up if other values are ever supported
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check(Description.NumSubsections == 1 || Description.NumSubsections == 2);
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// Store the presence of subsections in the sign bit
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HeightfieldScaleBias.X *= Description.NumSubsections > 1 ? -1 : 1;
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HeightfieldDescriptionData.Add(HeightfieldScaleBias);
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HeightfieldDescriptionData.Add(Description.MinMaxUV);
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HeightfieldDescriptionData.Add(FVector4f(Description.HeightfieldRect.Size().X, Description.HeightfieldRect.Size().Y, 1.f / Description.HeightfieldRect.Size().X, 1.f / Description.HeightfieldRect.Size().Y));
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const FMatrix44f LocalToWorldT = FMatrix44f(Description.LocalToWorld.GetTransposed());
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const FMatrix44f WorldToLocalT = FMatrix44f(Description.LocalToWorld.Inverse().GetTransposed());
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HeightfieldDescriptionData.Add(*(FVector4f*)&WorldToLocalT.M[0]);
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HeightfieldDescriptionData.Add(*(FVector4f*)&WorldToLocalT.M[1]);
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HeightfieldDescriptionData.Add(*(FVector4f*)&WorldToLocalT.M[2]);
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HeightfieldDescriptionData.Add(*(FVector4f*)&LocalToWorldT.M[0]);
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HeightfieldDescriptionData.Add(*(FVector4f*)&LocalToWorldT.M[1]);
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HeightfieldDescriptionData.Add(*(FVector4f*)&LocalToWorldT.M[2]);
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FVector4f ChannelMask(0.f, 0.f, 0.f, 0.f);
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if (Description.VisibilityChannel >= 0 && Description.VisibilityChannel < 4)
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{
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ChannelMask.Component(Description.VisibilityChannel) = 1.f;
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}
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HeightfieldDescriptionData.Add(ChannelMask);
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}
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check(HeightfieldDescriptionData.Num() % HEIGHTFIELD_DATA_STRIDE == 0);
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}
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FRDGBufferRef UploadHeightfieldDescriptions(FRDGBuilder& GraphBuilder, const TArray<FHeightfieldComponentDescription>& HeightfieldDescriptions)
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{
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TArray<FVector4f, SceneRenderingAllocator> HeightfieldDescriptionData;
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FillHeightfieldDescriptionData(HeightfieldDescriptions, /*out*/ HeightfieldDescriptionData);
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FRDGBufferRef HeightfieldDescriptionsBuffer = CreateUploadBuffer(
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GraphBuilder,
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TEXT("HeightfieldDescriptionsBuffer"),
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sizeof(FVector4f),
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FMath::RoundUpToPowerOfTwo(FMath::Max(HeightfieldDescriptionData.Num(), 1)),
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HeightfieldDescriptionData.GetData(),
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HeightfieldDescriptionData.Num() * HeightfieldDescriptionData.GetTypeSize()
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);
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return HeightfieldDescriptionsBuffer;
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}
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