pickup on "E" when begin overlap

Development Programming & Scripting C++
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10

I don’t know if you already solved this or not but this one is also a solution you can use.

in your GameCharacter.h, create a variable of AGun* (You can also use another type for the item) and a public setter to set the Gun.

UCLASS()
class YOUR_API AGameCharacter : public ACharacter
{
...
private:

UPROPERTY(...)
class AGun* OverlappingGun;

public:

void SetOverlappingGun(AGun* Gun);
...
}

in the GameCharacter.cpp,

void AGameCharacter::SetOverlappingGun(AGun* Gun)
{
  OverlappingGun = Gun;
}

And in the AGun.cpp, in the Begin and EndOverlap, you can set the overlapping gun of the character there.

void AGun::OnBeginOverlap(....)
{
	// Make sure the one who overlap is the character
	AGameCharacter* Char = Cast<AGameCharacter>(OtherActor);
	if (Char)
	{
		Char->SetOverlappingGun(this);
	}
}

void AGun::OnEndOverlap(....)
{
	// Make sure the one who overlap is the character
	AGameCharacter* Char = Cast<AGameCharacter>(OtherActor);
	if (Char)
	{
		Char->SetOverlappingGun(nullptr);
	}
}

Lastly, you just need to check the OverlappingGun value in the PickUp() function (dont forget to also bind the PlayerInput).

void AGameCharacter::SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent)
{
	// Set up gameplay key bindings
	check(PlayerInputComponent);
	PlayerInputComponent->BindAction("PickUp", IE_Pressed, this, &AGameCharacter::PickUp);
}

void AGameCharacter::PickUp()
{
	// Check if there is overlapping gun
	if (OverlappingGun)
	{
		// Pick up the gun
	}
}

you can just put your pickup logic inside the PickUp() after checking if OverlappingGun is valid.