LOG，调试输出

输出日志，屏幕消息

C++

UE_LOG(LogTemp, Warning, TEXT("LOG Test: Begin from C++"));

C++

    if (GEngine)
    {
        GEngine->AddOnScreenDebugMessage(1, 10.f, FColor::Cyan, FString::Printf(TEXT("GroundSpeed: %.2f"), GroundSpeed));
    }

绘制调试几何

需要包含头文件 DrawDebugHelpers.h

C++

    // 绘制调试球体
    UWorld* World = GetWorld();
    FVector Center = GetActorLocation();
    if (World)
    {
        DrawDebugSphere(World, Center, 30.f, 24, FColor::Cyan, true, 10.f);
    }
    // 此外还有线，点