ParticleLODLevel.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "UObject/ObjectMacros.h"
#include "UObject/Object.h"
#include "ParticleLODLevel.generated.h"
 
class UInterpCurveEdSetup;
class UParticleModule;
class UMaterialInterface;
struct FStreamingRenderAssetPrimitiveInfo;
 
UCLASS(collapsecategories, hidecategories=Object, editinlinenew, MinimalAPI)
class UParticleLODLevel : public UObject
{
    GENERATED_UCLASS_BODY()
 
    
    UPROPERTY()
    int32 Level;
 
    UPROPERTY()
    uint32 bEnabled:1;
 
    UPROPERTY(instanced)
    TObjectPtr<class UParticleModuleRequired> RequiredModule;
 
    UPROPERTY(instanced)
    TArray<TObjectPtr<class UParticleModule>> Modules;
 
    // Module<SINGULAR> used for emitter type "extension".
    UPROPERTY(export)
    TObjectPtr<class UParticleModuleTypeDataBase> TypeDataModule;
 
    UPROPERTY(export)
    TObjectPtr<class UParticleModuleSpawn> SpawnModule;
 
    UPROPERTY(export)
    TObjectPtr<class UParticleModuleEventGenerator> EventGenerator;
 
    UPROPERTY(transient, duplicatetransient)
    TArray<TObjectPtr<class UParticleModuleSpawnBase>> SpawningModules;
 
    UPROPERTY(transient, duplicatetransient)
    TArray<TObjectPtr<class UParticleModule>> SpawnModules;
 
    UPROPERTY(transient, duplicatetransient)
    TArray<TObjectPtr<class UParticleModule>> UpdateModules;
 
    UPROPERTY(transient, duplicatetransient)
    TArray<TObjectPtr<class UParticleModuleOrbit>> OrbitModules;
 
    UPROPERTY(transient, duplicatetransient)
    TArray<TObjectPtr<class UParticleModuleEventReceiverBase>> EventReceiverModules;
 
    UPROPERTY()
    uint32 ConvertedModules:1;
 
    UPROPERTY()
    int32 PeakActiveParticles;
 
 
    //~ Begin UObject Interface
    virtual void    PostLoad() override;
    virtual bool    IsPostLoadThreadSafe() const override;
    //~ End UObject Interface
 
    // @todo document
    virtual void    UpdateModuleLists();
 
    // @todo document
    virtual bool    GenerateFromLODLevel(UParticleLODLevel* SourceLODLevel, float Percentage, bool bGenerateModuleData = true);
 
    virtual int32   CalculateMaxActiveParticleCount();
 
    void    ConvertToSpawnModule();
        
    int32       GetModuleIndex(UParticleModule* InModule);
 
    ENGINE_API UParticleModule* GetModuleAtIndex(int32 InIndex);
 
    virtual void    SetLevelIndex(int32 InLevelIndex);
 
    // For Cascade
    void    AddCurvesToEditor(UInterpCurveEdSetup* EdSetup);
    void    RemoveCurvesFromEditor(UInterpCurveEdSetup* EdSetup);
    void    ChangeEditorColor(FColor& Color, UInterpCurveEdSetup* EdSetup);
 
    ENGINE_API bool IsModuleEditable(UParticleModule* InModule);
 
    void CompileModules( struct FParticleEmitterBuildInfo& EmitterBuildInfo );
 
    void GetUsedMaterials( TArray<UMaterialInterface*>& OutMaterials, const TArray<struct FNamedEmitterMaterial>& NamedMaterialSlots, const TArray<UMaterialInterface*>& EmitterMaterials) const;
 
    void GetStreamingMeshInfo(const FBoxSphereBounds& Bounds, TArray<FStreamingRenderAssetPrimitiveInfo>& OutStreamingRenderAssets) const;
};