vault backup: 2024-05-18 22:21:14

03-UnrealEngine/Sequence/Sequence Runtime Binding.md

@@ -6,7 +6,8 @@ tags:
 rating: ⭐
 ---
 # 前言
-***MovieSceneTextTrack ***引擎插件可以作为参考。
+***MovieSceneTextTrack*** 引擎插件可以作为参考。
+***UMovieSceneCVarTrackInstance***
 
 参考：
 1. [sequencer mute tracks at runtime from c](https://forums.unrealengine.com/t/sequencer-mute-tracks-at-runtime-from-c/476278/3)
@@ -62,6 +63,9 @@ UMovieSceneSequenceExtensions methods are not exported. They don’t have the PL
 - LevelSequence分析
 	- https://zhuanlan.zhihu.com/p/157892605
 
+## UMovieSceneTrackInstance
+大部分Track的instance类。
+
 ## 继承关系
 UMovieSceneSignedObject -> UObject。一个UMovieScene由若干个MasterTrack(UMovieSceneTrack)组成，UMovieScene相当于是UMovieSceneTracks的容器，那么UMovieSceneTrack又由UMovieSceneSections组成，UMovieSceneSection就是一个Track中间的某一段。
 
@@ -415,6 +419,41 @@ void UMovieSceneSequencePlayer::UpdateMovieSceneInstance(FMovieSceneEvaluationRa
 }
 ```
 
+这段解析来自于：https://zhuanlan.zhihu.com/p/413151867
+```c++
+UMovieSceneSequencePlayer::Play()           //蓝图中调用
+UMovieSceneSequencePlayer::PlayInternal()
+UMovieSceneSequencePlayer::UpdateMovieSceneInstance
+RootTemplateInstance.Evaluate(Context, *this);
+
+// FMovieSceneRootEvaluationTemplateInstance::Evaluate
+EntitySystemRunner.Update(Context, RootInstanceHandle);
+
+FMovieSceneEntitySystemRunner::Flush()
+FMovieSceneEntitySystemRunner::DoFlushUpdateQueueOnce()
+FMovieSceneEntitySystemRunner::GameThread_ProcessQueue()
+FMovieSceneEntitySystemRunner::GameThread_SpawnPhase()
+
+// FMovieSceneEntitySystemRunner::GameThread_SpawnPhase()
+/// System Linker->GetInstanceRegistry();
+FInstanceRegistry* InstanceRegistry = GetInstanceRegistry(); 
+FSequenceInstance& Instance = InstanceRegistry->MutateInstance(Update.InstanceHandle);
+Instance.Update(Linker, Update.Context);
+
+// FSequenceInstance::Update
+SequenceUpdater->Update(Linker, Params, ComponentField, EntitiesScratch);
+
+// FSequenceUpdater_Flat::Update
+FSequenceInstance& SequenceInstance = Linker->GetInstanceRegistry()->MutateInstance(InstanceHandle);
+SequenceInstance.Ledger.UpdateEntities
+
+// FEntityLedger::UpdateEntities
+FInstanceRegistry* InstanceRegistry = Linker->GetInstanceRegistry();
+ImportEntity(Linker, ImportParams, EntityField, Query);
+}
+```
+
+
 暂停的核心逻辑：
 ```c++
 FMovieSceneEvaluationRange CurrentTimeRange = PlayPosition.GetCurrentPositionAsRange();