[UE5] GAS EffectActor

GAS를 이용해 Effect Actor를 만든다.

 

AActor를 상속받는 EffectActor 클래스를 생성한다.

EffectActor.h

// Copyright mumu

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "AuraEffectActor.generated.h"

class USphereComponent;

UCLASS()
class AURA_API AAuraEffectActor : public AActor
{
	GENERATED_BODY()
	
public:	
	AAuraEffectActor();

	UFUNCTION()
	virtual void OnOverlap(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult);

	UFUNCTION()
	virtual  void EndOverlap(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex);
protected:
	virtual void BeginPlay() override;
private:
	UPROPERTY(VisibleAnywhere)
	TObjectPtr<USphereComponent> Sphere;

	UPROPERTY(VisibleAnywhere)
	TObjectPtr<UStaticMeshComponent> Mesh;

};

 

EffectActor.cpp

// Copyright mumu


#include "Actor/AuraEffectActor.h"

#include "AbilitySystemComponent.h"
#include "AbilitySystemInterface.h"
#include "AbilitySystem/AuraAttributeSet.h"
#include "Components/SphereComponent.h"

// Sets default values
AAuraEffectActor::AAuraEffectActor()
{
	PrimaryActorTick.bCanEverTick = false;

	Mesh = CreateDefaultSubobject<UStaticMeshComponent>("Mesh");
	SetRootComponent(Mesh);
	
	Sphere = CreateDefaultSubobject<USphereComponent>("Sphere");
	Sphere->SetupAttachment(GetRootComponent());
	
}

void AAuraEffectActor::OnOverlap(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor,
	UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult)
{
	// TODO: Change this to apply a Gameplay Effect. For now, using const_cast as a hack
	if(IAbilitySystemInterface* ASCInterface = Cast<IAbilitySystemInterface>(OtherActor))
	{
		const UAuraAttributeSet* AuraAttributeSet = Cast<UAuraAttributeSet>(ASCInterface->GetAbilitySystemComponent()->GetAttributeSet(UAuraAttributeSet::StaticClass()));

		UAuraAttributeSet* MutableAuraAttributeSet = const_cast<UAuraAttributeSet*>(AuraAttributeSet);
		MutableAuraAttributeSet->SetHealth(AuraAttributeSet->GetHealth() + 25.f);
		Destroy();
	}
}

void AAuraEffectActor::EndOverlap(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor,
	UPrimitiveComponent* OtherComp, int32 OtherBodyIndex)
{
	
}

void AAuraEffectActor::BeginPlay()
{
	Super::BeginPlay();

	Sphere->OnComponentBeginOverlap.AddDynamic(this, &AAuraEffectActor::OnOverlap);
	Sphere->OnComponentEndOverlap.AddDynamic(this, &AAuraEffectActor::EndOverlap);
}

 

오버랩이 될때 발생하는 코드다. 오버랩 되면 Health가 25 증가하도록 한다.

void AAuraEffectActor::OnOverlap(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor,
	UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult)
{
	// TODO: Change this to apply a Gameplay Effect. For now, using const_cast as a hack
	if(IAbilitySystemInterface* ASCInterface = Cast<IAbilitySystemInterface>(OtherActor))
	{
		const UAuraAttributeSet* AuraAttributeSet = Cast<UAuraAttributeSet>(ASCInterface->GetAbilitySystemComponent()->GetAttributeSet(UAuraAttributeSet::StaticClass()));

		UAuraAttributeSet* MutableAuraAttributeSet = const_cast<UAuraAttributeSet*>(AuraAttributeSet);
		MutableAuraAttributeSet->SetHealth(AuraAttributeSet->GetHealth() + 25.f);
		Destroy();
	}
}

 

CharacterBase에서 인터페이스를 사용했기 떄문에 이를 이용해 ASC를 받아와 AttributeSet에 집근을 한다.