LandscapeCulling.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
 
class FRHIBuffer;
class FVertexFactoryType;
enum EShaderPlatform : uint16;
namespace ERHIFeatureLevel { enum Type : int; }
class FLandscapeSharedBuffers;
struct FMeshBatch;
class FSceneViewFamily;
class FSceneView;
class FRDGBuilder;
struct FViewMatrices;
class FRHICommandListBase;
 
namespace UE {
    namespace Landscape {
        namespace Culling {
 
            struct FArguments
            {
                FRHIBuffer* IndirectArgsBuffer;
                FRHIBuffer* TileDataVertexBuffer;
                uint32 IndirectArgsOffset;
                uint32 TileDataOffset;
            };
 
            bool UseCulling(EShaderPlatform ShaderPlatform);
            
            FVertexFactoryType* GetTileVertexFactoryType();
 
            void SetupMeshBatch(const FLandscapeSharedBuffers& SharedBuffers, FMeshBatch& MeshBatch);
            void RegisterLandscape(FRHICommandListBase& RHICmdList, FLandscapeSharedBuffers& SharedBuffers, ERHIFeatureLevel::Type FeatureLevel, uint32 LandscapeKey, int32 SubsectionSizeVerts, int32 NumSubsections);
            void UnregisterLandscape(uint32 LandscapeKey);
 
            void PreRenderViewFamily(FSceneViewFamily& InViewFamily);
            void InitMainViews(FRDGBuilder& GraphBuilder, TArrayView<const FSceneView*> Views);
            void InitShadowViews(FRDGBuilder& GraphBuilder, TArrayView<const FSceneView*> ShadowDepthViews, TArrayView<FViewMatrices> ShadowViewMatrices);
            bool GetViewArguments(const FSceneView& View, uint32 LandscapeKey, FIntPoint SectionBase, int32 LODIndex, FArguments& Args);
        }
    }
};