BlueRoseNote/03-UnrealEngine/Sequence/Sequence Runtime Binding.md

title, date, excerpt, tags, rating

title	date	excerpt	tags	rating
Sequence Runtime Binding	2024-05-16 17:55:58			⭐

前言

参考：

1. sequencer mute tracks at runtime from c

方案一

• UMovieSceneTrack::SetEvalDisabled(bool)
• ULevelSequence::MarkAsChanged()
• MovieSceneCompiledDataManager::GetPrecompiledData()->Compile(ULevelSequence*)

// You first have to set the unwanted track as disabled via 
void YourDisableTrackFunction(UMovieSceneTrack* MovieSceneTrack, bool Value)
{
	if (MovieSceneTrack)
	{
		MovieSceneTrack->SetEvalDisabled(Value);
	}
}


// Then notify the sequencer that the tracks have been modified using MarkAsChanged and UMovieSceneCompiledDataManager::GetPrecompiledData()->Compile.
void YourMarkAsChangedFunction(ULevelSequence* Sequence)
{
	if (Sequence)
	{
		Sequence->MarkAsChanged();
		if (UMovieSceneCompiledDataManager::GetPrecompiledData())
		{
			UMovieSceneCompiledDataManager::GetPrecompiledData()->Compile(Sequence);
		}
	}
}

方案二

UMovieSceneSequenceExtensions methods are not exported. They don’t have the PLUGIN_API macro in the class, so you can’t link to them. Someone on discord said you can copy the plugin into your own project and add your own API macro and rebuild, but seems like a bit of work.

#include "LevelSequencePlayer.h" #include "MovieSceneSequencePlaybackSettings.h" #include "DefaultLevelSequenceInstanceData.h" #include "LevelSequenceActor.h" void UMyAnimInstance::StartSequence_Implementation() { FMovieSceneSequencePlaybackSettings Settings; ALevelSequenceActor *SequenceActor = nullptr; ULevelSequencePlayer* player = ULevelSequencePlayer::CreateLevelSequencePlayer(this, this->MySequence, Settings, SequenceActor); check(player); check(SequenceActor); SequenceActor->bOverrideInstanceData = 1; UDefaultLevelSequenceInstanceData* InstanceData = Cast<UDefaultLevelSequenceInstanceData>(SequenceActor->DefaultInstanceData.Get()); InstanceData->TransformOrigin = this->GetOwningActor()->GetActorTransform(); UMovieScene* MovieScene = this->MySequence->GetMovieScene(); check(MovieScene); const FMovieSceneBinding* Binding = Algo::FindBy(MovieScene->GetBindings(), FString("SequencerActor"), &FMovieSceneBinding::GetName); check(Binding); EMovieSceneObjectBindingSpace Space = EMovieSceneObjectBindingSpace::Root; FMovieSceneObjectBindingID BindingID = UE::MovieScene::FRelativeObjectBindingID(Binding->GetObjectGuid()); // Not sure about this if (Space == EMovieSceneObjectBindingSpace::Root) { BindingID.ReinterpretAsFixed(); } SequenceActor->AddBinding(BindingID, this->GetOwningActor()); player->Play(); // Save actor and player in properties this->SequencerActor = SequenceActor; this->SequencerPlayer = player; }

自定义Track

• Runtime修改绑定
  • UE4：扩展Sequencer的BakeTransform有关Camera的参数:https://zhuanlan.zhihu.com/p/554484287
  • LevelSequence对象绑定分析:https://zhuanlan.zhihu.com/p/548155341
• 自定义Track
  • https://zhuanlan.zhihu.com/p/396353973
  • https://zhuanlan.zhihu.com/p/414179358
  • https://zhuanlan.zhihu.com/p/413151867

继承关系

UMovieSceneSignedObject -> UObject

UMovieSceneSignedObject

子类有UMovieScene、UMovieSceneSequence、UMovieSceneTrack、UMovieSceneSection。 定义：

• FGuid Signature：用于确定Object身份，以便于绑定。
• FOnSignatureChanged OnSignatureChangedEvent：ChangedEvent。

UMovieSceneSection

UMovieSceneSkeletalAnimationSection

UMovieSceneTrack

UMovieSceneSkeletalAnimationTrack

• TArray<TObjectPtr<UMovieSceneSection>> AnimationSections：存储所有动画Section。
• FMovieSceneSkeletalAnimRootMotionTrackParams RootMotionParams：RootMotion控制。

编辑器代码：FSkeletalAnimationTrackEditor

Sequence绑定机制笔记

UMovieSceneSequence