MovieSceneBlenderSystemTypes.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "HAL/Platform.h"
#include "Math/NumericLimits.h"
#include "Templates/Casts.h"
#include "Templates/SubclassOf.h"
#include "Templates/TypeHash.h"
#include "EntitySystem/MovieSceneComponentDebug.h"
 
class UMovieSceneBlenderSystem;
class UMovieSceneEntitySystemLinker;
 
struct FMovieSceneBlenderSystemID
{
    static FMovieSceneBlenderSystemID Invalid;
 
    FMovieSceneBlenderSystemID() : Value(TNumericLimits<uint8>::Max()) {}
    explicit FMovieSceneBlenderSystemID(uint8 InValue) : Value(InValue) {}
 
    bool IsValid() const { return Value != Invalid.Value; }
 
    friend uint32 GetTypeHash(FMovieSceneBlenderSystemID SystemID)
    {
        return GetTypeHash(SystemID.Value);
    }
 
    friend bool operator==(FMovieSceneBlenderSystemID A, FMovieSceneBlenderSystemID B)
    {
        return A.Value == B.Value;
    }
 
    friend bool operator<(FMovieSceneBlenderSystemID A, FMovieSceneBlenderSystemID B)
    {
        return A.Value < B.Value;
    }
 
private:
    uint8 Value;
};
 
struct FMovieSceneBlendChannelID
{
    static constexpr uint16 INVALID_BLEND_CHANNEL = uint16(-1);
 
    FMovieSceneBlendChannelID() : ChannelID(INVALID_BLEND_CHANNEL) {}
    FMovieSceneBlendChannelID(FMovieSceneBlenderSystemID InSystemID, uint16 InChannelID) : SystemID(InSystemID), ChannelID(InChannelID) {}
 
    bool IsValid() const { return ChannelID != INVALID_BLEND_CHANNEL; }
 
    MOVIESCENE_API TSubclassOf<UMovieSceneBlenderSystem> GetSystemClass() const;
 
    MOVIESCENE_API UMovieSceneBlenderSystem* FindSystem(const UMovieSceneEntitySystemLinker* Linker) const;
 
    template<typename BlenderSystemClass>
    BlenderSystemClass* FindSystem(const UMovieSceneEntitySystemLinker* Linker) const
    {
        return CastChecked<BlenderSystemClass>(FindSystem(Linker));
    }
 
    friend bool operator==(const FMovieSceneBlendChannelID A, const FMovieSceneBlendChannelID B)
    {
        return (A.SystemID == B.SystemID && A.ChannelID == B.ChannelID);
    }
 
    friend uint32 GetTypeHash(const FMovieSceneBlendChannelID A)
    {
        return HashCombine(GetTypeHash(A.SystemID), GetTypeHash(A.ChannelID));
    }
 
    FMovieSceneBlenderSystemID SystemID;
 
    uint16 ChannelID;
};