BP_HandController not spawn

[Hexaylon]

Hi, have issue with the motion controller actors not showing up.
the controller was working following previous lesson, laser beam pointer and teleporting all OK.

However when trying to use a new C++ class of Actor as the HandControllers using a child blueprint, it does not spawn. not visible in the World Outliner.
Could anyone help to shine some light into the issue?

using UE4.27 + ms VS 2019. Compiling no errors.

not sure if it is because the SetHand function for left and right is problematic?

in HandController.h, I have

public:
	void SetHand(EControllerHand Hand);

and in HandController.cpp

void AHandController::SetHand(EControllerHand Hand)
{
	MotionController->SetTrackingSource(Hand); 
}

in VRCharacter.cpp

	LeftController = GetWorld()->SpawnActor<AHandController>(HandControllerClass);
	if (LeftController != nullptr)
	{

		LeftController->AttachToComponent(VRRoot, FAttachmentTransformRules::KeepRelativeTransform);
		LeftController->SetOwner(this);
		LeftController->SetHand(EControllerHand::Left);
	}

if need the cpp and .h files are here
ArchitectureExplorer/Source/ArchitectureExplorer at ControllerAsActor · hexaylon/ArchitectureExplorer · GitHub

Many thanks!

[beegeedee]

This might sound strange but try renaming the variable the controller is assigned to. I had the same issue when I was doing the course and changing to TheLeftController fixed for me.

Give that a try and let me know how you get on.

[Hexaylon]

thanks for the replay, beegeedee.
I changed the name into TheLeftController and TheRightContorller,
the problem remains the same after rebuilding and restarting UE.

would it be the TSubclass declaration have issue?

TSubclassOf<AHandController> HandControllerClass;

to be honest I didn’t quite understand the use of it.

[beegeedee]

It wouldn’t be the TSubclassOf as it enables the Editor to map any controller that derives from AHandController, such as your BP_HandController.

I’ll pull down your repository and take a look at some point and see if I can figure it out.

In the meantime, close the editor and delete the Binaries folder from your project as a test. This can often resolve the issue.

Last thing to try, and I know this is an inconvenience, reparent your VR character blueprint back to a standard UCharacter and then back to the UVRCharacter - you’ll probably have to remap. This might sort out the issue.

[Hexaylon]

thank you so much, beegeedee!
I figured out.
was my stupidity of not applying BP_handController inside the BP_VRCharacter slot for the Tsubclass.
No wonder it was not spawning.

[beegeedee]

So glad you got it sorted. Thanks for letting me know.