Can someone explain this error?

Development Programming & Scripting
1

After fixing a bad definition error, i just got this. Any ideas?

error C2664: 'void TBaseDynamicMulticastDelegate_FiveParams<void,AActor *,UPrimitiveComponent *,int32,bool,const FHitResult &,FWeakObjectPtr>::__Internal_AddDynamic<AcoinBrick>(UserClass *,void (__cdecl AcoinBrick::* )(Param1Type,Param2Type,Param3Type,Param4Type,Param5Type),const FString &)' : cannot convert argument 2 from 'void (__cdecl AcoinBrick::* )(AActor *,UPrimitiveComponent *,int32,bool,FHitResult)' to 'void (__cdecl AcoinBrick::* )(Param1Type,Param2Type,Param3Type,Param4Type,Param5Type)'
2

Are you trying to bind some function to your delegate ? if that, can you show your delegate and function you want to bind ?

3

Not quite sure what delegates are, but i’ll show you some stuff that i think is relevant.
.h

UFUNCTION()
		void OnCollision(AActor * OtherActor, UPrimitiveComponent * OtherComp, int32 OtherBodyIndex, bool bFromSweep, FHitResult SweepResult);

.cpp

CollisionPlate->OnComponentBeginOverlap.AddDynamic(this, &AcoinBrick::OnCollision, int32 OtherBodyIndex, bool bFromSweep, FHitResult SweepResult);

void AcoinBrick::OnCollision(AActor * OtherActor, UPrimitiveComponent * OtherComp, int32 OtherBodyIndex, bool bFromSweep, FHitResult SweepResult)
{
	if (GEngine)
	{
		GEngine->AddOnScreenDebugMessage(0, 10.0f, FColor::White, TEXT("Begin Overlap"));
	}
}
4

Your argumentsb still not fitting, i think this time problrm is that delegate expects const FHitResult & not just FHitResult, look on beggining of error you will see which types he expects.

5

oh, ok, OnComponentBeginOverlap is a delegate, it let you bind another function with same parameter to it, so you just need this

CollisionPlate->OnComponentBeginOverlap.AddDynamic(this, &AcoinBrick::OnCollision);
6

Thats what i already had, then i changed it, still no fix. :frowning:

7

check OnComponentBeginOverlap of CollisionPlate, AcoinBrick::OnCollision must have exactly same parameter.

8

Changed it, same error, been a very problematic process for me, asked like 3 or 4 questions on this :confused:

coinBrick.h
UFUNCTION()
void OnCollision(AActor * OtherActor, UPrimitiveComponent * OtherComp);

coinBrick.cpp

CollisionPlate->OnComponentBeginOverlap.AddDynamic(this, &AcoinBrick::OnCollision);


void AcoinBrick::OnCollision(AActor * OtherActor, UPrimitiveComponent * OtherComp,)
{
	if (GEngine)
	{
		GEngine->AddOnScreenDebugMessage(0, 10.0f, FColor::White, TEXT("Begin Overlap"));
	}
}
9

Finally fixed by looking at the FPS Shooter tutorials collision segment, it appears i was missing some params, in the end i just changed to Hit.

From
void OnCollision(class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult & SweepResult);
};

To

UFUNCTION()
	void OnHit(class AActor* OtherActor, class UPrimitiveComponent* OtherComp, FVector NormalImpulse, const FHitResult& Hit);




From
void AcoinBrick::OnCollision(class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult & SweepResult)
{

}

To

void AcoinBrick::OnHit(AActor* OtherActor, UPrimitiveComponent* OtherComp, FVector NormalImpulse, const FHitResult& Hit)
{
	if (OtherActor && (OtherActor != this) && OtherComp)
	{
		this->Destroy();
	}
}