problems with UCapsuleComponent overlapping

Development Programming & Scripting C++
1

Hi all,

I have a custom class which has a UCapsuleComponent attached. Upon calling a function (not constantly), I want to test to see if this component is overlapping either partially or fully with any other collidable object (ECC_PhysicsBody). How would I go about doing this?

I’ve already tried the following code, but it never returns any results:



		TestCapsule->SetWorldLocation(TestLocation);
		TestCapsule->SetCapsuleSize(iCapsuleHalfWidth, iCapsuleHalfHeight, true);

		TestCapsule->bGenerateOverlapEvents = true;
		TestCapsule->bMultiBodyOverlap = true;
		TestCapsule->bTraceComplexOnMove = true; //yes, i'm trying everything i can think of

		TArray<AActor*> Overlaps;
		TestCapsule->UpdateOverlaps();
		TestCapsule->GetOverlappingActors(Overlaps);
		if (Overlaps.Num() == 0)
		{
			UE_LOG(HelloWorld, Log, TEXT("no overlaps"));
			bPointIsGood = true;
		}
		else
		{
			UE_LOG(HelloWorld, Log, TEXT("overlapping %i objects"), Overlaps.Num());
			bPointIsGood = false;
		}
2

You should get an OnComponentBeginOverlap call when the capsule overlaps something shouldn’t you? Did you add method handlers for those?

3

Of course the Capsule needs to have collision enabled too, that would be my first port of call. Also Zoombapup is right in that there are already a bunch of delegates used to trigger collision events that you just need to tap into.

4

So I’ll need to add my own capsule class in order to override OnComponentBeginOverlap, correct?
If the Overlaps array never gets populated, why does it exist?

edit: I must be doing my binding wrong, it never fires.
I’m declaring it like so:



// .h
TScriptDelegate<FWeakObjectPtr> capdelegate;

//.cpp
capdelegate.BindUFunction(this, TEXT("testFunc"));
TestCapsule->OnComponentBeginOverlap.Add(capdelegate);

according to the docs, bGenerateOverlapEvents needs to be set to true for every single object i want to test against. i’ve set this temporarily for my test objects, but still no events are generated. i’m declaring the delegate as the last part in the constructor.

edit 2: the capsule is moving and testing overlap multiple times in a single frame, could this be part of the issue?