MovieSceneEvaluationTreePopulationRules.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Containers/Array.h"
#include "Containers/ArrayView.h"
#include "Containers/ContainerAllocationPolicies.h"
#include "CoreMinimal.h"
#include "Evaluation/MovieSceneSegment.h"
#include "HAL/Platform.h"
#include "MovieSceneSection.h"
#include "MovieSceneTrackEvaluationField.h"
#include "Templates/Function.h"
 
struct FMovieSceneTrackEvaluationData;
template <typename DataType> struct TMovieSceneEvaluationTree;
 
namespace UE
{
namespace MovieScene
{
 
struct FEvaluationTreePopulationRules
{
    struct FSortedSection
    {
        const UMovieSceneSection& Section;
        int32 Index;
 
        FSortedSection(const UMovieSceneSection& InSection, int32 InSectionIndex) : Section(InSection), Index(InSectionIndex) {}
 
        int32 Row() const { return Section.GetRowIndex(); }
        int32 OverlapPriority() const { return Section.GetOverlapPriority(); }
 
        //bool operator<(const FSortedSection& Other) const { return SortByOverlapPriorityAndRow(*this, Other); }
 
        static bool SortByOverlapPriorityAndRow(const FSortedSection& A, const FSortedSection& B)
        {
            if (A.Row() == B.Row())
            {
                return A.OverlapPriority() > B.OverlapPriority();
            }
            return A.Row() < B.Row();
        }
    };
 
    using FSectionSortPredicate = TFunctionRef<bool(const FSortedSection&, const FSortedSection&)>;
 
    MOVIESCENE_API static void Blended(TArrayView<UMovieSceneSection* const> Sections, TMovieSceneEvaluationTree<FMovieSceneTrackEvaluationData>& OutTree);
 
    MOVIESCENE_API static void Blended(TArrayView<UMovieSceneSection* const> Sections, TMovieSceneEvaluationTree<FMovieSceneTrackEvaluationData>& OutTree, FSectionSortPredicate Predicate);
 
    MOVIESCENE_API static void HighPass(TArrayView<UMovieSceneSection* const> Sections, TMovieSceneEvaluationTree<FMovieSceneTrackEvaluationData>& OutTree);
 
    MOVIESCENE_API static void HighPassPerRow(TArrayView<UMovieSceneSection* const> Sections, TMovieSceneEvaluationTree<FMovieSceneTrackEvaluationData>& OutTree);
 
    MOVIESCENE_API static void HighPassCustom(TArrayView<UMovieSceneSection* const> Sections, TMovieSceneEvaluationTree<FMovieSceneTrackEvaluationData>& OutTree, FSectionSortPredicate Predicate);
 
    MOVIESCENE_API static void HighPassCustomPerRow(TArrayView<UMovieSceneSection* const> Sections, TMovieSceneEvaluationTree<FMovieSceneTrackEvaluationData>& OutTree, FSectionSortPredicate Predicate);
 
    MOVIESCENE_API static void PopulateNearestSection(TArrayView<UMovieSceneSection* const> Sections, TMovieSceneEvaluationTree<FMovieSceneTrackEvaluationData>& OutTree);
 
private:
    static void SortSections(TArrayView<UMovieSceneSection* const> Sections, TArray<FSortedSection, TInlineAllocator<16>>& SortedSections, FSectionSortPredicate Predicate);
};
 
} // namespace MovieScene
} // namespace UE