Method BeginPlay

Source/URLab/Private/Replay/MjReplayManager.cpp:41–130

}

void AMjReplayManager::BeginPlay()
{
	Super::BeginPlay();

	// Ensure live session exists
	Sessions.FindOrAdd(LiveSessionName);
	ActiveSessionName = LiveSessionName;

	// Auto-connect to manager if possible
	Manager = AAMjManager::GetManager();
	if (Manager)
	{
		// Sets OnPostStep directly rather than RegisterPostStepCallback -- replay
		// needs exclusive control of the callback, not append-to behavior.
		if (Manager->PhysicsEngine)
		{
			Manager->PhysicsEngine->OnPostStep = [this](mjModel* m, mjData* d) {
				this->OnPostStep(m, d);
			};
		}
	}

	if (bAutoRecord)
	{
		StartRecording();
	}

	// Auto-load any CSV/JSON replays from Saved/URLab/Replays/
	{
		FString ReplayDir = FPaths::ProjectSavedDir() / TEXT("URLab") / TEXT("Replays");
		IFileManager::Get().MakeDirectory(*ReplayDir, true);

		TArray<FString> FoundFiles;
		IFileManager::Get().FindFiles(FoundFiles, *(ReplayDir / TEXT("*.csv")), true, false);

		TArray<FString> JsonFiles;
		IFileManager::Get().FindFiles(JsonFiles, *(ReplayDir / TEXT("*.json")), true, false);
		FoundFiles.Append(JsonFiles);

		for (const FString& FileName : FoundFiles)
		{
			FString FullPath = ReplayDir / FileName;
			FString SessionName = FPaths::GetBaseFilename(FileName);

			if (Sessions.Contains(SessionName))
				continue;

			if (FileName.EndsWith(TEXT(".csv")))
			{
				LoadFromCSV(FullPath);
			}
			else if (FileName.EndsWith(TEXT(".json")))
			{
				FString JsonString;
				if (FFileHelper::LoadFileToString(JsonString, *FullPath))
				{
					TSharedPtr<FJsonObject> RootObject;
					TSharedRef<TJsonReader<>> Reader = TJsonReaderFactory<>::Create(JsonString);