ue5 lyra探索分析1

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问题1：

这个地图的worldsetting中并没有指定gamemode，那么游戏运行的时候角色的类型是怎么指定的呢？

有人说在projectsetting中有一个全局的gamemode

 但是这个角色的类型也不是真的运行起来角色的类型

 真的运行的时候角色的类型是 如上图所示

找一下吧，看看具体是在哪里设定的，过程是如何的。茫茫大海如何着手呢，我先在lyracharacter的构造函数打个断点看看

 从堆栈中找到一个有用的信息

 从图上看spawn的时候已经指定好了，而且这个函数是重载基类的方法，继续跟代码。

UClass* ALyraGameMode::GetDefaultPawnClassForController_Implementation(AController* InController)
{
	if (const ULyraPawnData* PawnData = GetPawnDataForController(InController))
	{
		if (PawnData->PawnClass)
		{
			return PawnData->PawnClass;
		}
	}

	return Super::GetDefaultPawnClassForController_Implementation(InController);
}

重载了父类 的方法，这里出现了ULyraPawnData这个数据类型，继续跟代码

 发现首先从gamestate上找到一个叫ULyraExperienceManagerComponent组件

从组件上获得一个ULyraExperienceDefinition数据类型的数据。

继续找

const ULyraExperienceDefinition* ULyraExperienceManagerComponent::GetCurrentExperienceChecked() const
{
	check(LoadState == ELyraExperienceLoadState::Loaded);
	check(CurrentExperience != nullptr);
	return CurrentExperience;
}

void ALyraGameMode::OnMatchAssignmentGiven(FPrimaryAssetId ExperienceId, const FString& ExperienceIdSource)
{
#if WITH_SERVER_CODE
	if (ExperienceId.IsValid())
	{
		UE_LOG(LogLyraExperience, Log, TEXT("Identified experience %s (Source: %s)"), *ExperienceId.ToString(), *ExperienceIdSource);

		ULyraExperienceManagerComponent* ExperienceComponent = GameState->FindComponentByClass<ULyraExperienceManagerComponent>();
		check(ExperienceComponent);
		ExperienceComponent->ServerSetCurrentExperience(ExperienceId);
	}
	else
	{
		UE_LOG(LogLyraExperience, Error, TEXT("Failed to identify experience, loading screen will stay up forever"));
	}
#endif
}

void ALyraGameMode::HandleMatchAssignmentIfNotExpectingOne()
{
	FPrimaryAssetId ExperienceId;
	FString ExperienceIdSource;

	// Precedence order (highest wins)
	//  - Matchmaking assignment (if present)
	//  - URL Options override
	//  - Developer Settings (PIE only)
	//  - Command Line override
	//  - World Settings
	//  - Default experience

	UWorld* World = GetWorld();

	if (!ExperienceId.IsValid() && UGameplayStatics::HasOption(OptionsString, TEXT("Experience")))
	{
		const FString ExperienceFromOptions = UGameplayStatics::ParseOption(OptionsString, TEXT("Experience"));
		ExperienceId = FPrimaryAssetId(FPrimaryAssetType(ULyraExperienceDefinition::StaticClass()->GetFName()), FName(*ExperienceFromOptions));
		ExperienceIdSource = TEXT("OptionsString");
	}

	if (!ExperienceId.IsValid() && World->IsPlayInEditor())
	{
		ExperienceId = GetDefault<ULyraDeveloperSettings>()->ExperienceOverride;
		ExperienceIdSource = TEXT("DeveloperSettings");
	}

	// see if the command line wants to set the experience
	if (!ExperienceId.IsValid())
	{
		FString ExperienceFromCommandLine;
		if (FParse::Value(FCommandLine::Get(), TEXT("Experience="), ExperienceFromCommandLine))
		{
			ExperienceId = FPrimaryAssetId::ParseTypeAndName(ExperienceFromCommandLine);
			ExperienceIdSource = TEXT("CommandLine");
		}
	}

	// see if the world settings has a default experience
	if (!ExperienceId.IsValid())
	{
		if (ALyraWorldSettings* TypedWorldSettings = Cast<ALyraWorldSettings>(GetWorldSettings()))
		{
			ExperienceId = TypedWorldSettings->GetDefaultGameplayExperience();
			ExperienceIdSource = TEXT("WorldSettings");
		}
	}

	ULyraAssetManager& AssetManager 

本文标签： lyra