MovieSceneComponentMaterialSystem.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Templates/TypeHash.h"
#include "EntitySystem/MovieSceneEntitySystem.h"
#include "Evaluation/PreAnimatedState/MovieScenePreAnimatedStateStorage.h"
 
#include "Systems/MovieSceneMaterialSystem.h"
#include "Tracks/MovieSceneMaterialTrack.h"
 
#include "MovieSceneComponentMaterialSystem.generated.h"
 
class UMovieScenePiecewiseDoubleBlenderSystem;
 
namespace UE::MovieScene
{
 
struct FComponentMaterialKey
{
    FObjectKey Object;
    FComponentMaterialInfo MaterialInfo;
 
    friend uint32 GetTypeHash(const FComponentMaterialKey& In)
    {
        return HashCombine(GetTypeHash(In.Object), GetTypeHash(In.MaterialInfo));
    }
    friend bool operator==(const FComponentMaterialKey& A, const FComponentMaterialKey& B)
    {
        return A.Object == B.Object && A.MaterialInfo == B.MaterialInfo;
    }
};
 
struct FComponentMaterialAccessor
{
    using KeyType = FComponentMaterialKey;
 
    UObject* Object;
    FComponentMaterialInfo MaterialInfo;
 
    FComponentMaterialAccessor(const FComponentMaterialKey& InKey);
    FComponentMaterialAccessor(UObject* InObject, const FComponentMaterialInfo& InMaterialInfo);
 
    explicit operator bool() const;
 
    UMaterialInterface* GetMaterial() const;
    void SetMaterial(UMaterialInterface* InMaterial) const;
    UMaterialInstanceDynamic* CreateDynamicMaterial(UMaterialInterface* InMaterial);
    FString ToString() const;
};
 
using FPreAnimatedComponentMaterialTraits          = TPreAnimatedMaterialTraits<FComponentMaterialAccessor, UObject*, FComponentMaterialInfo>;
using FPreAnimatedComponentMaterialParameterTraits = TPreAnimatedMaterialParameterTraits<FComponentMaterialAccessor, UObject*, FComponentMaterialInfo>;
 
struct FPreAnimatedComponentMaterialSwitcherStorage
    : public TPreAnimatedStateStorage<TPreAnimatedMaterialTraits<FComponentMaterialAccessor, UObject*, FComponentMaterialInfo>>
{
    static TAutoRegisterPreAnimatedStorageID<FPreAnimatedComponentMaterialSwitcherStorage> StorageID;
};
 
struct FPreAnimatedComponentMaterialParameterStorage
    : public TPreAnimatedStateStorage<TPreAnimatedMaterialParameterTraits<FComponentMaterialAccessor, UObject*, FComponentMaterialInfo>>
{
    static TAutoRegisterPreAnimatedStorageID<FPreAnimatedComponentMaterialParameterStorage> StorageID;
};
 
} // namespace UE::MovieScene
 
 
UCLASS(MinimalAPI)
class UMovieSceneComponentMaterialSystem
    : public UMovieSceneEntitySystem
    , public IMovieScenePreAnimatedStateSystemInterface
{
public:
 
    GENERATED_BODY()
 
    UMovieSceneComponentMaterialSystem(const FObjectInitializer& ObjInit);
 
private:
 
    virtual void OnLink() override;
    virtual void OnUnlink() override;
    virtual void OnRun(FSystemTaskPrerequisites& InPrerequisites, FSystemSubsequentTasks& Subsequents) override;
 
    virtual void SavePreAnimatedState(const FPreAnimationParameters& InParameters) override;
 
private:
 
    UE::MovieScene::TMovieSceneMaterialSystem<UE::MovieScene::FComponentMaterialAccessor, UObject*, FComponentMaterialInfo> SystemImpl;
};