MovieSceneCurveChannelCommon.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Containers/EnumAsByte.h"
#include "Curves/RichCurve.h"
#include "KeyParams.h"
#include "Misc/FrameNumber.h"
#include "MovieSceneChannel.h"
#include "MovieSceneChannelData.h"
#include "MovieSceneChannelTraits.h"
#include "UObject/Class.h"
#include "UObject/ObjectMacros.h"
 
#include "MovieSceneCurveChannelCommon.generated.h"
 
class FArchive;
template <typename T> struct TIsPODType;
 
 
USTRUCT()
struct FMovieSceneTangentData
{
    GENERATED_BODY()
 
    FMovieSceneTangentData()
        : ArriveTangent(0.f)
        , LeaveTangent(0.f)
        , ArriveTangentWeight(0.f)
        , LeaveTangentWeight(0.f)
        , TangentWeightMode(RCTWM_WeightedNone)
 
    {}
 
    bool Serialize(FArchive& Ar);
    bool operator==(const FMovieSceneTangentData& Other) const;
    bool operator!=(const FMovieSceneTangentData& Other) const;
    friend FArchive& operator<<(FArchive& Ar, FMovieSceneTangentData& P)
    {
        P.Serialize(Ar);
        return Ar;
    }
 
    UPROPERTY(EditAnywhere, Category = "Key")
    float ArriveTangent;
 
    UPROPERTY(EditAnywhere, Category = "Key")
    float LeaveTangent;
 
    UPROPERTY(EditAnywhere, Category = "Key")
    float ArriveTangentWeight;
 
    UPROPERTY(EditAnywhere, Category = "Key")
    float LeaveTangentWeight;
 
    UPROPERTY(EditAnywhere, Category = "Key")
    TEnumAsByte<ERichCurveTangentWeightMode> TangentWeightMode;
 
    // This is required because TMovieSceneCurveChannelImpl<ChannelType>::Serialize dumps us as a byte array so we need padding to be initialized to avoid indeterminism in the cooked build
    uint8 UnserializedPaddingBytes[3] = {0};
};
 
// Make sure padding size matches our expectation
static_assert(sizeof(FMovieSceneTangentData) == 
    sizeof(FMovieSceneTangentData::ArriveTangent) + sizeof(FMovieSceneTangentData::LeaveTangent) + sizeof(FMovieSceneTangentData::ArriveTangentWeight) + 
    sizeof(FMovieSceneTangentData::LeaveTangentWeight) + sizeof(FMovieSceneTangentData::TangentWeightMode) + sizeof(FMovieSceneTangentData::UnserializedPaddingBytes),
    "Adjust padding size to avoid cooked build indeterminism with uninitialized padded data");
 
 
template<>
struct TIsPODType<FMovieSceneTangentData>
{
    enum { Value = true };
};
 
 
template<>
struct TStructOpsTypeTraits<FMovieSceneTangentData>
    : public TStructOpsTypeTraitsBase2<FMovieSceneTangentData>
{
    enum
    {
        WithSerializer = true,
        WithCopy = false,
        WithIdenticalViaEquality = true,
    };
    static constexpr EPropertyObjectReferenceType WithSerializerObjectReferences = EPropertyObjectReferenceType::None;
};