I'm struggling making a door that opens up/down

[Alex_Rusu]

I’ve been trying to set some floats and FVectors for a gate door and I’ve tried using the same code as in the door rotation, but I keep making Unreal crash, then rebuild everything, then fail again. It’s been a few good hours now and I’d like some help. So, if an FRotator holds the XYZ rotation coordinates, what holds the XYZ for the position/location?

The code I’ve tried that crashed Unreal several times was

float InitialLocation = GetOwner()->GetActorLocation();
UE_LOG(LogTemp, Error, TEXT("The object is at %f"), *InitialLocation)

Note: I’ve also tried %s or GetActorLocation().Z

When I try to compile it crashes. I don’t even know why. I tried deleting the component and made a new one in hopes it will work. When I try to initialise the float in the header float InitialLocation; at private, then add the code I wrote above it just crashes. I don’t even know what is happening. Can anyone point me into the right direction? Thanks!

[DanM]

@Alex_Rusu

what holds the XYZ for the position/location?

FVector.

@Alex_Rusu

Note: I’ve also tried %s or GetActorLocation().Z

%f would be correct there.

@Alex_Rusu

When I try to initialise the float in the header float InitialLocation; at private, then add the code I wrote above it just crashes.

That would mean you’re doing that in a constructor and the component doesn’t have an owner yet, That means you’re dereferencing a null pointer.

[Alex_Rusu]

Thanks for your help, Dan. I did manage to get a little further in my code. I am printing a float 0.000 in the log, but I tought it would give me 3 values XYZ. I’ve initialised the FVector in the header as: FVector InitialPosition = FVector(0.f, 0.f,0.f); After that, in the cpp file I’ve put this
FVector InitialPosition = GetOwner()->GetActorLocation();
UE_LOG(LogTemp, Error, TEXT("Gate is at %f"), &InitialPosition.Z);
The log is printing: , but the object’s coordinates are

Am I doing something wrong? How could I get the return of GetActorLocation() as actual coordinates?

[DanM]

@Alex_Rusu

but I tought it would give me 3 values XYZ

You’re only giving it a single value (Z). Like I said earlier, use ToString if you want to print the values of the FVector.

@Alex_Rusu

FVector InitialPosition = GetOwner()->GetActorLocation(); 
UE_LOG(LogTemp, Error, TEXT("Gate is at %f"), &InitialPosition.Z);

That is printing the address of InitialPosItion.Z though will the incorrect format specifier to print an address.

// Print Z axis value
UE_LOG(LogTemp, Error, TEXT("Gate is at %f"), InitialPosition.Z);
// Print all values
UE_LOG(LogTemp, Error, TEXT("Gate is at %s"), *InitialPosition.ToString());

[Alex_Rusu]

Thank you, Dan. It took me almost 3 days and all I had done wrong was use an ‘&’ in the wrong place! I need to study pointers a lot more. Thank you very much!