Apply Damage To Interactor

Type: Plugin/Engine only

This full actor example damages whoever interacts with it, using Unreal's standard damage pipeline.

Example

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "Data/EDInteractionTypes.h"
#include "MyTrapConsoleActor.generated.h"

class UArrowComponent;
class UEDInteractableComponent;
class USceneComponent;
class UStaticMeshComponent;

UCLASS()
class AMyTrapConsoleActor : public AActor
{
	GENERATED_BODY()

public:
	AMyTrapConsoleActor();

protected:
	virtual void BeginPlay() override;

	UPROPERTY(VisibleAnywhere)
	TObjectPtr<USceneComponent> Root;

	UPROPERTY(VisibleAnywhere)
	TObjectPtr<UStaticMeshComponent> ConsoleMesh;

	UPROPERTY(VisibleAnywhere)
	TObjectPtr<USceneComponent> WidgetHolder;

	UPROPERTY(VisibleAnywhere)
	TObjectPtr<UArrowComponent> CenterArrow;

	UPROPERTY(VisibleAnywhere)
	TObjectPtr<UEDInteractableComponent> InteractableComponent;

	UPROPERTY(EditAnywhere, Category = "Damage")
	float DamageToApply = 15.f;

	UFUNCTION()
	void HandleInteractionSuccessful(const FEDInteractionEventContext& Context);
};

#include "MyTrapConsoleActor.h"

#include "Components/ArrowComponent.h"
#include "Components/EDInteractableComponent.h"
#include "Components/SceneComponent.h"
#include "Components/StaticMeshComponent.h"
#include "GameFramework/Pawn.h"
#include "Kismet/GameplayStatics.h"

AMyTrapConsoleActor::AMyTrapConsoleActor()
{
	Root = CreateDefaultSubobject<USceneComponent>(TEXT("Root"));
	SetRootComponent(Root);

	ConsoleMesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("ConsoleMesh"));
	ConsoleMesh->SetupAttachment(Root);
	ConsoleMesh->ComponentTags.Add(FName(TEXT("DimensionComponent")));

	WidgetHolder = CreateDefaultSubobject<USceneComponent>(TEXT("WidgetHolder"));
	WidgetHolder->SetupAttachment(Root);
	WidgetHolder->SetRelativeLocation(FVector(0.f, 0.f, 70.f));
	WidgetHolder->ComponentTags.Add(FName(TEXT("WidgetHolderComponent")));

	CenterArrow = CreateDefaultSubobject<UArrowComponent>(TEXT("CenterArrow"));
	CenterArrow->SetupAttachment(ConsoleMesh);
	CenterArrow->ComponentTags.Add(FName(TEXT("CenterComponent")));

	InteractableComponent = CreateDefaultSubobject<UEDInteractableComponent>(TEXT("InteractableComponent"));
}

void AMyTrapConsoleActor::BeginPlay()
{
	Super::BeginPlay();
	InteractableComponent->OnInteractionSuccessful.AddDynamic(this, &AMyTrapConsoleActor::HandleInteractionSuccessful);
}

void AMyTrapConsoleActor::HandleInteractionSuccessful(const FEDInteractionEventContext& Context)
{
	APawn* InstigatorPawn = Context.Instigator ? Context.Instigator->GetPawn() : nullptr;
	if (!InstigatorPawn)
	{
		return;
	}

	UGameplayStatics::ApplyDamage(InstigatorPawn, DamageToApply, Context.Instigator, this, UDamageType::StaticClass());
}

Why this is a good pattern

• It works with Unreal's standard health/damage systems.
• It composes cleanly with effects, UI, and cooldowns.