StaticLightingSystemInterface.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
#include "Components/PrimitiveComponent.h"
#include "Components/LightComponent.h"
#include "Components/SkyAtmosphereComponent.h"
 
class FMaterialRenderProxy;
 
class IStaticLightingSystem
{
public:
    virtual const class FMeshMapBuildData* GetPrimitiveMeshMapBuildData(const UPrimitiveComponent* Component, int32 LODIndex) { return nullptr; }
    virtual const class FLightComponentMapBuildData* GetLightComponentMapBuildData(const ULightComponent* Component) { return nullptr; }
    virtual const class FPrecomputedVolumetricLightmap* GetPrecomputedVolumetricLightmap() { return nullptr; }
    virtual ~IStaticLightingSystem() {}
};
 
class IStaticLightingSystemImpl
{
public: 
    virtual IStaticLightingSystem* GetStaticLightingSystemForWorld(UWorld* InWorld) { return nullptr; }
 
    virtual void EditorTick() {}
    virtual bool IsStaticLightingSystemRunning() { return false; }
};
 
class FStaticLightingSystemInterface
{
public:
    DECLARE_MULTICAST_DELEGATE_OneParam(FPrimitiveComponentBasedSignature, UPrimitiveComponent* /*InComponent*/);
    DECLARE_MULTICAST_DELEGATE_OneParam(FLightComponentBasedSignature, ULightComponentBase* /*InComponent*/);
    DECLARE_MULTICAST_DELEGATE_TwoParams(FStationaryLightChannelReassignmentSignature, ULightComponentBase* /*InComponent*/, int32 /*NewShadowMapChannel*/);
    DECLARE_MULTICAST_DELEGATE(FLightmassImportanceVolumeModifiedSignature);
    DECLARE_TS_MULTICAST_DELEGATE_OneParam(FMaterialInvalidationSignature, FMaterialRenderProxy* /*Material*/);
 
    static ENGINE_API FPrimitiveComponentBasedSignature OnPrimitiveComponentRegistered;
    static ENGINE_API FPrimitiveComponentBasedSignature OnPrimitiveComponentUnregistered;
    static ENGINE_API FLightComponentBasedSignature OnLightComponentRegistered;
    static ENGINE_API FLightComponentBasedSignature OnLightComponentUnregistered;
    static ENGINE_API FStationaryLightChannelReassignmentSignature OnStationaryLightChannelReassigned;
    static ENGINE_API FLightmassImportanceVolumeModifiedSignature OnLightmassImportanceVolumeModified;
    static ENGINE_API FMaterialInvalidationSignature OnMaterialInvalidated;
    static ENGINE_API FSimpleMulticastDelegate OnSkyAtmosphereModified;
    
    static ENGINE_API const class FMeshMapBuildData* GetPrimitiveMeshMapBuildData(const UPrimitiveComponent* Component, int32 LODIndex = 0);
    static ENGINE_API const class FLightComponentMapBuildData* GetLightComponentMapBuildData(const ULightComponent* Component);
    static ENGINE_API const class FPrecomputedVolumetricLightmap* GetPrecomputedVolumetricLightmap(UWorld* World);
    
    static ENGINE_API void EditorTick();
    static ENGINE_API void GameTick(float DeltaSeconds);
    static ENGINE_API bool IsStaticLightingSystemRunning();
 
    static ENGINE_API FStaticLightingSystemInterface* Get();
 
    ENGINE_API void RegisterImplementation(FName Name, IStaticLightingSystemImpl* Impl);
    ENGINE_API void UnregisterImplementation(FName Name);
    ENGINE_API IStaticLightingSystemImpl* GetPreferredImplementation();
 
private:
    TMap<FName, IStaticLightingSystemImpl*> Implementations;
 
    static FStaticLightingSystemInterface* Interface;
};