Implemented Apply Effect using GAS

Removed const_casts and replaced with EffectSpecs
deanhsjones · Dec 11, 2023 · c839b81 · c839b81
1 parent 8b67e85
commit c839b81
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Showing 4 changed files with 68 additions and 47 deletions.
diff --git a/Content/Blueprints/Actor/BP_HealthPotion.uasset b/Content/Blueprints/Actor/BP_HealthPotion.uasset
diff --git a/Content/Maps/StartupMap.umap b/Content/Maps/StartupMap.umap
diff --git a/Source/Aura/Private/Actor/AuraEffectActor.cpp b/Source/Aura/Private/Actor/AuraEffectActor.cpp
@@ -2,52 +2,66 @@
 
 
 #include "Actor/AuraEffectActor.h"
+#include "AbilitySystemBlueprintLibrary.h"
 
 #include "AbilitySystemComponent.h"
-#include "AbilitySystemInterface.h"
-#include "AbilitySystem/AuraAttributeSet.h"
-
-#include "Components/SphereComponent.h"
+//#include "AbilitySystemInterface.h"
+//#include "AbilitySystem/AuraAttributeSet.h"
+//
+//#include "Components/SphereComponent.h"
 
 
 AAuraEffectActor::AAuraEffectActor()
 {
 	PrimaryActorTick.bCanEverTick = false;
 
-	Mesh = CreateDefaultSubobject<UStaticMeshComponent>("Mesh");
-	SetRootComponent(Mesh);
-	Sphere = CreateDefaultSubobject<USphereComponent>("Sphere");
-	Sphere->SetupAttachment(GetRootComponent());
-
+	//Mesh = CreateDefaultSubobject<UStaticMeshComponent>("Mesh");
+	//SetRootComponent(Mesh);
+	//Sphere = CreateDefaultSubobject<USphereComponent>("Sphere");
+	//Sphere->SetupAttachment(GetRootComponent());
 
+	SetRootComponent(CreateDefaultSubobject<USceneComponent>("SceneRoot"));
+
 }
 
-void AAuraEffectActor::OnOverlap(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor,
-	UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult)
-{
+//void AAuraEffectActor::OnOverlap(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor,
+//	UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult)
+//{
+//
+//	//TO DO: Change this to apply a Gameplay Effect; for now using const cast as a hack just to see how it works ;)
+//
+//	if (IAbilitySystemInterface* ASCInterface = Cast<IAbilitySystemInterface>(OtherActor))
+//	{
+//		const UAuraAttributeSet* AuraAttributeSet = Cast<UAuraAttributeSet>(ASCInterface->GetAbilitySystemComponent()->GetAttributeSet(UAuraAttributeSet::StaticClass()));
+//		//here is the const cast! This is dangerous and should be changed!
+//		UAuraAttributeSet* MutableAuraAttributeSet = const_cast<UAuraAttributeSet*>(AuraAttributeSet);
+//		MutableAuraAttributeSet->SetHealth(AuraAttributeSet->GetHealth() + 25.f);
+//		MutableAuraAttributeSet->SetMana(AuraAttributeSet->GetMana() - 25.f);
+//		//that was the const cast! Change it later!
+//		Destroy();
+//	}
+//}
+//
+//void AAuraEffectActor::EndOverlap(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, 
+//	UPrimitiveComponent* OtherComp, int32 OtherBodyIndex)
+//{
+//}
 
-	//TO DO: Change this to apply a Gameplay Effect; for now using const cast as a hack just to see how it works ;)
-
-	if (IAbilitySystemInterface* ASCInterface = Cast<IAbilitySystemInterface>(OtherActor))
-	{
-		const UAuraAttributeSet* AuraAttributeSet = Cast<UAuraAttributeSet>(ASCInterface->GetAbilitySystemComponent()->GetAttributeSet(UAuraAttributeSet::StaticClass()));
-		//here is the const cast! This is dangerous and should be changed!
-		UAuraAttributeSet* MutableAuraAttributeSet = const_cast<UAuraAttributeSet*>(AuraAttributeSet);
-		MutableAuraAttributeSet->SetHealth(AuraAttributeSet->GetHealth() + 25.f);
-		MutableAuraAttributeSet->SetMana(AuraAttributeSet->GetMana() - 25.f);
-		//that was the const cast! Change it later!
-		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);
+//}
 
-void AAuraEffectActor::BeginPlay()
+void AAuraEffectActor::ApplyEffectToTarget(AActor* Target, TSubclassOf<UGameplayEffect> GameplayEffectClass)
 {
-	Super::BeginPlay();
-	Sphere->OnComponentBeginOverlap.AddDynamic(this, &AAuraEffectActor::OnOverlap);
-	Sphere->OnComponentEndOverlap.AddDynamic(this, &AAuraEffectActor::EndOverlap);
+	UAbilitySystemComponent* TargetAbilitySystemComponent = UAbilitySystemBlueprintLibrary::GetAbilitySystemComponent(Target);
+	if (TargetAbilitySystemComponent == nullptr) return;
+
+	check(GameplayEffectClass);
+	FGameplayEffectContextHandle EffectContextHandle = TargetAbilitySystemComponent->MakeEffectContext();
+	EffectContextHandle.AddSourceObject(this);
+	const FGameplayEffectSpecHandle EffectSpecHandle = TargetAbilitySystemComponent->MakeOutgoingSpec(GameplayEffectClass, 1.f, EffectContextHandle);
+	TargetAbilitySystemComponent->ApplyGameplayEffectSpecToSelf(*EffectSpecHandle.Data.Get());
 }
diff --git a/Source/Aura/Public/Actor/AuraEffectActor.h b/Source/Aura/Public/Actor/AuraEffectActor.h
@@ -7,8 +7,9 @@
 #include "AuraEffectActor.generated.h"
 
 
-class USphereComponent;
-//class UStaticMeshComponent;
+//class USphereComponent;
+class UGameplayEffect;
+
 
 UCLASS()
 class AURA_API AAuraEffectActor : public AActor
@@ -18,24 +19,30 @@ class AURA_API AAuraEffectActor : public AActor
 public:	
 	AAuraEffectActor();
 
-	UFUNCTION()
-	virtual void OnOverlap(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, 
-		UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult);
+	//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);
+	//UFUNCTION()
+	//virtual void EndOverlap(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, 
+	//	UPrimitiveComponent* OtherComp,	int32 OtherBodyIndex);
 
 
 
 protected:
-	virtual void BeginPlay() override;
+	/*virtual void BeginPlay() override;*/
+
+	UFUNCTION(BlueprintCallable)
+	void ApplyEffectToTarget(AActor* Target, TSubclassOf<UGameplayEffect> GameplayEffectClass);
+
+	UPROPERTY(EditAnywhere, Category = "Applied Effects")
+	TSubclassOf<UGameplayEffect> InstantGameplayEffectClass;
 
 private:
-	UPROPERTY(VisibleAnywhere)
-	TObjectPtr<USphereComponent> Sphere;
+	//UPROPERTY(VisibleAnywhere)
+	//TObjectPtr<USphereComponent> Sphere;
 
-	UPROPERTY(VisibleAnywhere)
-	TObjectPtr<UStaticMeshComponent> Mesh;
+	//UPROPERTY(VisibleAnywhere)
+	//TObjectPtr<UStaticMeshComponent> Mesh;
 
 };