C++ UMovieScene::GetCameraCutTrack方法代码示例

UMovieSceneCameraCutTrack* FCameraCutTrackEditor::FindOrCreateCameraCutTrack()
{
	UMovieScene* FocusedMovieScene = GetFocusedMovieScene();
	UMovieSceneTrack* CameraCutTrack = FocusedMovieScene->GetCameraCutTrack();

	if (CameraCutTrack == nullptr)
	{
		const FScopedTransaction Transaction(LOCTEXT("AddCameraCutTrack_Transaction", "Add Camera Cut Track"));
		FocusedMovieScene->Modify();
		
		CameraCutTrack = FocusedMovieScene->AddCameraCutTrack(UMovieSceneCameraCutTrack::StaticClass());
	}

	return CastChecked<UMovieSceneCameraCutTrack>(CameraCutTrack);
}

bool FCameraCutTrackEditor::HandleAddCameraCutTrackMenuEntryCanExecute() const
{
	UMovieScene* FocusedMovieScene = GetFocusedMovieScene();

	return ((FocusedMovieScene != nullptr) && (FocusedMovieScene->GetCameraCutTrack() == nullptr));
}

void FMovieSceneSequenceInstance::RefreshInstance( IMovieScenePlayer& Player )
{
	if(MovieSceneSequence.IsValid())
	{
		UMovieScene* MovieScene = MovieSceneSequence->GetMovieScene();
		TimeRange = MovieScene->GetPlaybackRange();

		UMovieSceneTrack* CameraCutTrack = MovieScene->GetCameraCutTrack();

		if (CameraCutTrack != nullptr)
		{
			FMovieSceneInstanceMap CameraCutTrackInstanceMap;

			if (CameraCutTrackInstance.IsValid())
			{
				CameraCutTrackInstanceMap.Add(CameraCutTrack, CameraCutTrackInstance);
			}

			TArray<TWeakObjectPtr<UObject>> Objects;
			TArray<UMovieSceneTrack*> Tracks;
			Tracks.Add(CameraCutTrack);
			RefreshInstanceMap(Tracks, Objects, CameraCutTrackInstanceMap, Player);

			CameraCutTrackInstance = CameraCutTrackInstanceMap.FindRef(CameraCutTrack);
		}
		else if(CameraCutTrackInstance.IsValid())
		{
			CameraCutTrackInstance->ClearInstance(Player, *this);
			CameraCutTrackInstance.Reset();
		}

		// Get all the master tracks and create instances for them if needed
		const TArray<UMovieSceneTrack*>& MasterTracks = MovieScene->GetMasterTracks();
		TArray<TWeakObjectPtr<UObject>> Objects;
		RefreshInstanceMap( MasterTracks, Objects, MasterTrackInstances, Player );

		TSet< FGuid > FoundObjectBindings;
		// Get all tracks for each object binding and create instances for them if needed
		const TArray<FMovieSceneBinding>& ObjectBindings = MovieScene->GetBindings();
		for( int32 BindingIndex = 0; BindingIndex < ObjectBindings.Num(); ++BindingIndex )
		{
			const FMovieSceneBinding& ObjectBinding = ObjectBindings[BindingIndex];

			// Create an instance for this object binding
			FMovieSceneObjectBindingInstance& BindingInstance = ObjectBindingInstances.FindOrAdd( ObjectBinding.GetObjectGuid() );
			BindingInstance.ObjectGuid = ObjectBinding.GetObjectGuid();

			FoundObjectBindings.Add( ObjectBinding.GetObjectGuid() );

			// Populate the runtime objects for this instance of the binding.
			// @todo sequencer: SubSequences: We need to know which actors were removed and which actors were added so we know which saved actor state to restore/create
			BindingInstance.RuntimeObjects.Empty();
			Player.GetRuntimeObjects( SharedThis( this ), BindingInstance.ObjectGuid, BindingInstance.RuntimeObjects );

			// Refresh the instance's tracks
			const TArray<UMovieSceneTrack*>& Tracks = ObjectBinding.GetTracks();
			RefreshInstanceMap( Tracks, BindingInstance.RuntimeObjects, BindingInstance.TrackInstances, Player );
		}

		IMovieSceneSpawnRegister& SpawnRegister = Player.GetSpawnRegister();

		// Remove object binding instances which are no longer bound
		TMap<FGuid, FMovieSceneObjectBindingInstance>::TIterator It = ObjectBindingInstances.CreateIterator();
		for( ; It; ++It )
		{
			if( !FoundObjectBindings.Contains( It.Key() ) )
			{
				SpawnRegister.DestroySpawnedObject(It.Key(), *this, Player);

				// The instance no longer is bound to an existing guid
				It.RemoveCurrent();
			}
		}
	}
}