ParticleSystemStateStream.h

Go to the documentation of this file.

// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "ParticleSystemStateStreamHandle.h"
#include "StateStreamDefinitions.h"
#include "TransformStateStreamHandle.h"
#include "ParticleSystemStateStream.generated.h"
 
class UFXSystemAsset;
 
// Static state for mesh instance. Can only be set upon creation
 
USTRUCT(StateStreamStaticState)
struct FParticleSystemStaticState
{
    GENERATED_USTRUCT_BODY()
};
 
 
// Dynamic state for mesh instance. Can be updated inside ticks
 
USTRUCT(StateStreamDynamicState)
struct FParticleSystemDynamicState
{
    GENERATED_USTRUCT_BODY()
 
private:
 
    UPROPERTY()
    FTransformHandle Transform;
 
    UPROPERTY()
    TObjectPtr<UFXSystemAsset> SystemAsset;
};
 
 
// Mesh state stream id used for registering dependencies and find statestream
 
inline constexpr uint32 ParticleSystemStateStreamId = 4;
 
 
// Interface for creating mesh instances
 
class IParticleSystemStateStream
{
public:
    DECLARE_STATESTREAM(ParticleSystem)
    virtual FParticleSystemHandle Game_CreateInstance(const FParticleSystemStaticState& Ss, const FParticleSystemDynamicState& Ds) = 0;
 
    virtual void SetOtherBackend(IParticleSystemStateStream* Other) {}
};