Equip function parameter is null...why?

Development Programming & Scripting C++
, , , ,
1

Hello!

I am trying to setup a basic function to equip a sword (Skeletal Mesh) to my character. I have setup all the code in c++ and have the function call in blueprints (for now). My parameter (AWeaponBase* WeaponToEquip) returns a nullptr and I’m not sure why.

I’m trying to call the function from my main character, HeroBase.cpp and my WeaponBase class is pretty basic. I’ve only created a Mesh/BoxComponent.

HeroBase.cpp

void AHeroBase::EquipWeapon(AWeaponBase* WeaponToEquip)
{
	if (!WeaponToEquip)
	{
		if (GEngine)
		{
			GEngine->AddOnScreenDebugMessage(
				-1,
				15.f,
				FColor::Red,
				FString::Printf(TEXT("WEAPON NOT EQUIPPED!!"))
			);
		}
		return;
	}

	const USkeletalMeshSocket* WeaponSocket = GetMesh()->GetSocketByName(FName("WeaponSocket_r"));
	
	if (WeaponSocket)
	{
		WeaponSocket->AttachActor(WeaponToEquip, GetMesh());
		if (GEngine)
		{
			GEngine->AddOnScreenDebugMessage(
				-1,
				15.f,
				FColor::Green,
				FString::Printf(TEXT("WEAPON EQUIPPED!!"))
			);
		}
	}
}

WeaponBase.h

UCLASS()
class OATHBOUND_API AWeaponBase : public AActor
{
	GENERATED_BODY()
	
public:	
	AWeaponBase();
	virtual void Tick(float DeltaTime) override;
	
protected:
	virtual void BeginPlay() override;
	virtual void PostInitializeComponents() override;

private:
	/*
	 *	Weapon Components
	 */
	UPROPERTY(VisibleAnywhere, Category = "Components")
	USkeletalMeshComponent* WeaponMesh;

	UPROPERTY(VisibleAnywhere, Category = "Components")
	UBoxComponent* WeaponCollision;

public:
	UFUNCTION()
	void WeaponCollisionOnBeginOverlap(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult);
	UFUNCTION()
	void WeaponCollisionOnEndOverlap(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex);
};

HeroBase BP call:

Equip
Equip1437×893 145 KB

If there is anything I’m doing wrong or need to add, please let me know!
I apologize if this is something that all beginners should know, but I’ve been stuck for awhile now.

Thank you in advance!!

1 Like
3

From the blueprints, I created a variable that’s an object reference to my AWeaponBase class. I don’t understand why it’s not referencing the class because it is a direct reference to it.

I did use the IsValid node, but it gives me the same output as I have in my equip function conditional.

I don’t know what else to do.

4

This has been very insightful! Thank you for your help!

1 Like