MovieSceneCachedEntityFilterResult.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Containers/Array.h"
#include "Containers/ArrayView.h"
#include "EntitySystem/MovieSceneEntitySystemTypes.h"
#include "HAL/Platform.h"
 
namespace UE
{
namespace MovieScene
{
 
class FEntityManager;
struct FEntityAllocation;
 
enum class ECachedEntityManagerState
{
    UpToDate,
 
    Stale,
};
 
 
struct FCachedEntityManagerState
{
    MOVIESCENE_API ECachedEntityManagerState Update(const FEntityManager& InEntityManager);
 
    void Invalidate()
    {
        LastSystemVersion = 0;
    }
 
    inline uint64 GetSerial() const
    {
        return LastSystemVersion;
    }
 
private:
 
    uint64 LastSystemVersion = 0;
};
 
 
struct FCachedEntityFilterResult_Match
{
    FEntityComponentFilter Filter;
 
    MOVIESCENE_API bool Matches(const FEntityManager& InEntityManager);
 
    MOVIESCENE_API void Invalidate();
 
private:
 
    FCachedEntityManagerState Cache;
 
    bool bContainsMatch = false;
};
 
 
struct FCachedEntityFilterResult_Allocations
{
    FEntityComponentFilter Filter;
 
    MOVIESCENE_API TArrayView<FEntityAllocation* const> GetMatchingAllocations(const FEntityManager& InEntityManager);
 
    MOVIESCENE_API void Invalidate();
 
private:
 
    FCachedEntityManagerState Cache;
 
    TArray<FEntityAllocation*> MatchedEntityAllocations;
};
 
 
} // namespace MovieScene
} // namespace UE