Cannot spawn an actor from class

Development Programming & Scripting
1

Hello.
I’m trying to make a simple inventory system and right now I want to implement item dropping.
This is my code:

    		if (PlayerInventory.Last() == "Item Zero")
    		{
    			GEngine->AddOnScreenDebugMessage(-1, 5, FColor::Red, FString::Printf(TEXT("Dropped Item Zero")));
    			FActorSpawnParameters DropParams;
    			DropParams.Owner = this;
    			DropParams.Instigator = Instigator;
    			AItemZero* const DroppedItem = World->SpawnActor<AItemZero>(ItemZeroDrop, PlayerCamera->GetComponentLocation(), PlayerCamera->GetComponentRotation(), DropParams);
    			PlayerInventory.Pop();
    		}

and the “ItemZeroDrop” is

	TSubclassOf<class AItemZero> ItemZeroDrop;

The code compiles without errors, but it doesn’t work.
When I press Q (which is the key for dropping items) I can see the message “Dropped Item Zero”, but no actors spawn.

If you know why, then please help.

2

Maybe you just don’t see it, because you are spawning it directly inside your head ?

I would insert a AddOnScreenDebugMessage(…) inside my AItemZero tick, which simply tells me, if it is existing.

Note: Inside tick setting the time to 0.0001 works best for me.

3

No, it’s not spawning at all, the number of currently existing actors in the level doesn’t increase…

4

I got to assume one of your refferences is invalid. Are you sure you assigned ItemZeroDrop a Class? Its a Placeholder but its empty by default.

You can check in a if statement if World and ItemZeroDrop actually Point to something before trying to Spawn. You can also verify if the Spawn was successful or returned you a nullptr (failed to spawn)

5

So I actually looked at one of my old codes and you were right.
Thanks for your answer.