Can't access function in another class C++

Development Programming & Scripting C++
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1

Chances are that Sentinal is not owning Shrouded, reason why your GetOwner() doesn’t return what you expect.
If I understand correctly a Sentinal is what you’re trying to hit; try to cast Hit.Actor instead.
Hope that helps.

2

Hi guys, I am just trying a call the function Death() which is located in Sentinal.cpp from Shrouded.cpp using a cast. Sentinal.h has been included within the Shrouded.cpp file. However when it is called with Sentinal->Death(); it returns null.

Any help would be appreciated, I am able to provide more if needed.

Shrouded.cpp

void AShrouded::Melee()
{
	GetWorldTimerManager().SetTimer(ShroudHandle, this, &AShrouded::Unshroud, 0.1, false);

	FVector Location;
	FRotator Rotation;
	FHitResult Hit;
	FString HitActor;

	GetController()->GetPlayerViewPoint(Location, Rotation);

	FVector Start = Location;
	FVector End = Start + (Rotation.Vector() * MeleeDistance);

	FCollisionQueryParams TraceParams;
	bool bHit = GetWorld()->LineTraceSingleByChannel(Hit, Start, End, ECC_Visibility, TraceParams);

	if (bHit)
	{
		DrawDebugLine(GetWorld(), Start, End, FColor::Red, false, 2.0f);
		DrawDebugBox(GetWorld(), Hit.ImpactPoint, FVector(2, 2, 2), FColor::Red, false, 2.0f);

		ASentinal* Sentinal = Cast<ASentinal>(GetOwner());
		if (Sentinal != nullptr)
		{
			Sentinal->Death();
		}
		else {
			GEngine->AddOnScreenDebugMessage(-1, 15.0f, FColor::Red, TEXT("null"));
		}
		

	}
}

Sentinal.h

	UFUNCTION()
		void Death();

Sentinal.cpp

void ASentinal::Death()
{
	
	GEngine->AddOnScreenDebugMessage(-1, 15.0f, FColor::Yellow, TEXT("You killed a Sentinal"));
	GetMesh()->SetAllBodiesSimulatePhysics(true);
	GetMesh()->SetSimulatePhysics(true);
	GetMesh()->WakeAllRigidBodies();
	GetMesh()->bBlendPhysics = true;
	
}
3

Is Shrouded a component of Sentinal? I assume GetOwner() doesn’t return what you expect it to return, and that’s why casting fails.

4

No they’re two seperate classes. Yeah I’m not sure if GetOwner was the play Death() is just a simple function in Sentinal.

5

I’m not sure because im not using the standard on hit but rather a line trace to determine whether or not it has hit another character.

6

You sent me on the right track fraps! I had to case Hit.GetActor() instead.
Here’s the code:

	if (bHit)
	{
		DrawDebugLine(GetWorld(), Start, End, FColor::Red, false, 2.0f);
		DrawDebugBox(GetWorld(), Hit.ImpactPoint, FVector(2, 2, 2), FColor::Red, false, 2.0f);

		ASentinal* Sentinal = Cast<ASentinal>(Hit.GetActor());
		if (Sentinal != nullptr)
		{
			Sentinal->Death();
		}
		else {
			GEngine->AddOnScreenDebugMessage(-1, 15.0f, FColor::Red, TEXT("null"));
		}
		

	}