[UE5] PostGameplayEffect // Data Getter 구현, Qualifier 'const' is only allowed on non-static member functions 오류해결

0. Data 내부 접근이 안되는 문제발생

*해결 : f12를 눌러 정의부로이동 -> 원본헤더파일을 인클루드!!

#include "GameplayEffectExtension.h"

 

 

1. Data 안에 수많은 정보들이 있는걸 볼수있다.

디버깅, 브레이크포인트를 걸어보면

void UAuraAttributeSet::PostGameplayEffectExecute(const FGameplayEffectModCallbackData& Data)
{
	Super::PostGameplayEffectExecute(Data);

 

2. Target, Source의 Data들을 채워넣는 실습

void UAuraAttributeSet::PostGameplayEffectExecute(const FGameplayEffectModCallbackData& Data)
{
	Super::PostGameplayEffectExecute(Data);

	// Soruce == causer of effect , Target = target of the effect(owner of AS)


	const FGameplayEffectContextHandle EffectContextHandle = Data.EffectSpec.GetContext();

	const UAbilitySystemComponent* SourceASC = EffectContextHandle.GetOriginalInstigatorAbilitySystemComponent();

	//널체크
	if(IsValid(SourceASC) && SourceASC->AbilityActorInfo.IsValid() && SourceASC->AbilityActorInfo->AvatarActor.IsValid())
	{
		AActor* SourceAvatarActor = SourceASC->AbilityActorInfo->AvatarActor.Get();

		//소스의 컨트롤러얻기
		const AController* SourceController = SourceASC->AbilityActorInfo->PlayerController.Get();

		//소스의 컨트롤러가 널인경우, (아바타)액터를 폰에 캐스팅하여, 액터자체어서 컨트롤러를 가져옴
		if(SourceController==nullptr &&SourceAvatarActor!=nullptr)
		{
			if(const APawn* Pawn = Cast<APawn>(SourceAvatarActor))
			{
				SourceController = Pawn->GetController();
			}
		}
		if(SourceController!=nullptr)
		{
			ACharacter* SourceCharacter = Cast<ACharacter>(SourceController->GetPawn());
		}
	}

	if(Data.Target.AbilityActorInfo.IsValid() && Data.Target.AbilityActorInfo->AvatarActor.IsValid())
	{
		AActor* TargetAvatarActor = Data.Target.AbilityActorInfo->AvatarActor.Get();
		AController* TargetController = Data.Target.AbilityActorInfo->PlayerController.Get();
		ACharacter* TargetCharacter = Cast<ACharacter>(TargetAvatarActor);
		UAbilitySystemComponent* TargetASC = UAbilitySystemBlueprintLibrary::GetAbilitySystemComponent(TargetAvatarActor);

		
	}
	
	
}

 

3.Refactor : 구조체에 값을 저장하고 관리하도록 리팩토링

//Source, Target의 데이터를 저장하는 구조체
USTRUCT()
struct  FEffectProperties
{
	GENERATED_BODY()

	FEffectProperties(){} //기본생성자

	FGameplayEffectContextHandle EffectContextHandle;

	UPROPERTY()
	UAbilitySystemComponent* SourceASC = nullptr;

	UPROPERTY()
	AActor* SourceAvatarActor = nullptr;

	UPROPERTY()
	AController* SourceController = nullptr;

	UPROPERTY()
	ACharacter* SourceCharacter=nullptr;

	UPROPERTY()
	UAbilitySystemComponent* TargetASC = nullptr;

	UPROPERTY()
	AActor* TargetAvatarActor = nullptr;

	UPROPERTY()
	AController* TargetController = nullptr;

	UPROPERTY()
	ACharacter* TargetCharacter=nullptr;
};

 

void UAuraAttributeSet::SetEffectProperties(const FGameplayEffectModCallbackData& Data, FEffectProperties& Props) const
{
	// Soruce == causer of effect , Target = target of the effect(owner of AS)


	Props.EffectContextHandle = Data.EffectSpec.GetContext();

	Props.SourceASC = Props.EffectContextHandle.GetOriginalInstigatorAbilitySystemComponent();

	//널체크
	if(IsValid(Props.SourceASC) && Props.SourceASC->AbilityActorInfo.IsValid() && Props.SourceASC->AbilityActorInfo->AvatarActor.IsValid())
	{
		Props.SourceAvatarActor = Props.SourceASC->AbilityActorInfo->AvatarActor.Get();

		//소스의 컨트롤러얻기
		Props.SourceController = Props.SourceASC->AbilityActorInfo->PlayerController.Get();

		//소스의 컨트롤러가 널인경우, (아바타)액터를 폰에 캐스팅하여, 액터자체어서 컨트롤러를 가져옴
		if(Props.SourceController==nullptr &&Props.SourceAvatarActor!=nullptr)
		{
			if(const APawn* Pawn = Cast<APawn>(Props.SourceAvatarActor))
			{
				Props.SourceController = Pawn->GetController();
			}
		}
		if(Props.SourceController!=nullptr)
		{
			Props.SourceCharacter = Cast<ACharacter>(Props.SourceController->GetPawn());
		}
	}

	if(Data.Target.AbilityActorInfo.IsValid() && Data.Target.AbilityActorInfo->AvatarActor.IsValid())
	{
		Props.TargetAvatarActor = Data.Target.AbilityActorInfo->AvatarActor.Get();
		Props.TargetController = Data.Target.AbilityActorInfo->PlayerController.Get();
		Props.TargetCharacter = Cast<ACharacter>(Props.TargetAvatarActor);
		Props.TargetASC = UAbilitySystemBlueprintLibrary::GetAbilitySystemComponent(Props.TargetAvatarActor);
	}
	
}

 

4. 결과 :

Props.만 찍으면 원하는 정보를 쉽게 get할수있다.

이걸가지고 재밌는 게임을 만들면 된다.

 

4.  Qualifier 'const' is only allowed on non-static member functions 오류해결

 UAuraAttributeSet::SetEffectProperties

함수이름앞에 클래스이름:: 붙여줘야 멤버함수로 간주 -> const 가능!

 

https://github.com/DongHoonYu96/GameplayAbilitySystem_Aura/commit/9b8855f1c31bcc7d5b7a123fc85695c474bc8b6b