MovieSceneCameraCutViewportPreviewer.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#if WITH_EDITOR
 
#include "CoreMinimal.h"
#include "UObject/WeakObjectPtr.h"
 
class AActor;
class FLevelEditorViewportClient;
class UCameraComponent;
struct FEditorViewportViewModifierParams;
struct FPostProcessSettings;
struct FMovieSceneCameraCutParams;
 
namespace UE::MovieScene
{
    struct FCameraCutPlaybackCapability;
    struct FPreAnimatedCameraCutEditorStorage;
 
    struct FCameraCutViewportPreviewerTarget
    {
        // Either an actor with an optional camera component...
        AActor* CameraActor = nullptr;
        UCameraComponent* CameraComponent = nullptr;
 
        // ...or a pre-animated viewport position, to be found in the given storage.
        TSharedPtr<FPreAnimatedCameraCutEditorStorage> PreAnimatedStorage;
 
        void Get(FLevelEditorViewportClient* InClient, FVector& OutLocation, FRotator& OutRotation, float& OutFOV, FPostProcessSettings& OutPP, float& OutPPWeight) const;
    };
 
    class FCameraCutViewportPreviewer
    {
    public:
        FCameraCutViewportPreviewer();
        ~FCameraCutViewportPreviewer();
 
        void ToggleViewportPreviewModifiers(bool bEnable);
 
        void SetupBlend(const FCameraCutViewportPreviewerTarget& From, const FCameraCutViewportPreviewerTarget& To, float InBlendFactor);
 
        void TeardownBlend();
 
    private:
 
        void UpdatePreviewLevelViewportClientFromCameraCut(FLevelEditorViewportClient& InViewportClient, UObject* InCameraObject, const FMovieSceneCameraCutParams& CameraCutParams);
        void ModifyViewportClientView(FEditorViewportViewModifierParams& Params);
        void OnLevelViewportClientListChanged();
 
    private:
        FCameraCutViewportPreviewerTarget FromTarget;
        FCameraCutViewportPreviewerTarget ToTarget;
        float BlendFactor;
 
        bool bApplyViewModifier;
 
        bool bViewportModifiersRegistered = false;
        TArray<FLevelEditorViewportClient*> RegisteredViewportClients;
    };
 
}  // namespace UE::MovieScene
 
#endif  // WITH_EDITOR