Trouble using AttachToComponent()

Development Programming & Scripting
,
1

I have an Equipment class to represent items that can be picked up and put into the players hand. I want to use Actor->AttachToComponent() to do this.

void APlayerCharacter::EquipItem(AEquipment* Equipment)
{
        if (Equipment == nullptr) return;
	
	UE_LOG(LogTemp, Warning, TEXT("Equipping %s"), *Equipment->GetActorNameOrLabel());

	FName Socket = TEXT("RightHandGripPoint");

	FAttachmentTransformRules Rules = FAttachmentTransformRules(EAttachmentRule::SnapToTarget, false);

	Equipment->SetSimulatePhysicsAndCollision(false);
	
	Equipment->AttachToComponent(GetMesh(), Rules, Socket); 
}

I’m really not sure what part of the code is causing this issue. I know that there are usually a set of common issues that I’ve gone over and double checked aren’t the issue, these would be…

  • Ensuring the socket name is correct (used copy paste and validated by eye).
  • Equipment is definitely not a nullptr, the UE_LOG confirms that the interacted item is the one I want.
  • I’ve seen that it’s important to turn off the items physics and collision before attaching to the interacting character, so this is done here…
void AEquipment::SetSimulatePhysicsAndCollision(bool bSimulatePhysics)
{
	if (Mesh)
	{
		Mesh->SetSimulatePhysics(bSimulatePhysics);

		if (bSimulatePhysics)
		{
			Mesh->SetCollisionResponseToAllChannels(ECollisionResponse::ECR_Block);
		}
		else
		{
			Mesh->SetCollisionResponseToAllChannels(ECollisionResponse::ECR_Overlap);
		}
		
	}
}

Any help getting the equipment to attach properly is appreciated. I’m 99% sure the problem lies in the EquipItem() function, since the interface that calls this function handles every other case exactly as intended.

2

When attaching the item, are you attaching it from the root component? (Is the mesh the root or is there another parent component?)

3

The mesh isn’t the root component no. I’ve found a solution which I’m really unsure of why it works.

I was calling EquipItem() from a self-defined InventoryComponent using Parent->EquipItem().

It turns out that calling this code from the character class and the inventory class produces two different behaviours, with the characters behaviour giving me what I want.

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