UE小白，有錯(cuò)誤的地方請(qǐng)指出。
本文使用UE5，如在UE4中使用可能需調(diào)整某些API

方法一

1.獲取鏡頭控制器，并開(kāi)啟點(diǎn)擊事件

APlayerController* playerController;
void AMeshChangeController::Item()
{
	playerController = FAITestHelpers::GetWorld()->GetFirstPlayerController();
	playerController->bEnableClickEvents = true;
	playerController->SetShowMouseCursor(true);
	playerController->EnableInput(playerController);
	
}
void AMeshChangeController::BeginPlay()
{
	Super::BeginPlay();
	Item();
	
}

2.鼠標(biāo)點(diǎn)擊發(fā)射射線(xiàn)

在Tick中調(diào)用射線(xiàn)發(fā)射邏輯
UE中API看起來(lái)沒(méi)有分鼠標(biāo)抬起和鼠標(biāo)按下API，如有大佬知道可以評(píng)論一下。文章來(lái)源地址http://www.zghlxwxcb.cn/news/detail-614735.html

void AMeshChangeController::Tick(float DeltaTime)
{
	Super::Tick(DeltaTime);
	TestRay();
}
void
 AMeshChangeController:: TestRay()
{
	//鼠標(biāo)左鍵觸發(fā)
	if(playerController->IsInputKeyDown(EKeys::LeftMouseButton))
	{
		FHitResult OutHit;//用于接收命中的Actor
		FVector Start; //射線(xiàn)起點(diǎn)
		FVector End ;	//射線(xiàn)終點(diǎn)
		FVector Dir;	//鼠標(biāo)點(diǎn)擊的方向
		playerController->DeprojectMousePositionToWorld(Start, Dir);

		End = Start + (Dir * 100000);
		DrawDebugLine(GetWorld(), Start, End, FColor::Green, false, 100, 0, 5);//繪制射線(xiàn)
		bool isFinsh = GetWorld()->LineTraceSingleByObjectType(OutHit, Start, End, ECC_WorldStatic);//進(jìn)行射線(xiàn)檢測(cè)

		if (Cast<AActor>(OutHit.GetActor()))
		{
			AActor* gameObject = OutHit.GetActor();
			FString s = gameObject->GetActorNameOrLabel();
			
			UE_LOG(LogTemp, Warning, TEXT("被點(diǎn)擊的物體,%s"), *s);
		}
	}
}

方法二

1.獲取鏡頭控制器，并開(kāi)啟點(diǎn)擊事件

APlayerController* playerController;
void AMeshChangeController::Item()
{
	playerController = FAITestHelpers::GetWorld()->GetFirstPlayerController();
	playerController->bEnableClickEvents = true;
	playerController->SetShowMouseCursor(true);
	playerController->EnableInput(playerController);
	
}
void AMeshChangeController::BeginPlay()
{
	Super::BeginPlay();
	Item();
	
}

2.使用射線(xiàn)API

		playerController->HitResultTraceDistance = 1000000;
		playerController->GetHitResultUnderCursor(ECollisionChannel::ECC_Visibility,true,OutHit);
		if (Cast<AActor>(OutHit.GetActor()))
		{

		}

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