BeginOverlap function does not get called for the character C++ CapsuleComponent

Development Programming & Scripting C++
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1

Hi I am trying to achieve when a simple character who when presses a button within a trigger opens a door.
I am trying to use the character capsule component which for the collision with trigger. But i cannot seem to fire the Overlap function call. Although the same is happening in blueprints.

Here’s My Code

MyCharacter.h

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Character.h"
#include "MyCharacter.generated.h"

UCLASS()
class DARKHORSEUNREAL_API AMyCharacter : public ACharacter
{
	GENERATED_BODY()

	/** First person camera */
	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = Camera, meta = (AllowPrivateAccess = "true"))
	class UCameraComponent* FirstPersonCameraComponent;

	/** Base turn rate*/
	UPROPERTY(VisibleAnywhere, Category = "Camera")
	float BaseTurnRate;

	/** Base look up/down rate */
	UPROPERTY(VisibleAnywhere, Category = "Camera")
	float BaseLookUpRate;

//Creating a variable to store and call the capsule component from ACharacter class
UPROPERTY(VisibleAnywhere, Category = “Capsule”)
class UCapsuleComponent* CollisionCapsule;

protected:
	// Called when the game starts or when spawned
	virtual void BeginPlay() override;

	//Handles moving forward/backward
	void MoveForward(float Val);

	//Handles stafing movement, left and right
	void MoveRight(float Val);

	//Handles the input for door closing/opening
	void DoorAction();

public:
	// Constructor-Sets default values for this character's properties
	AMyCharacter();

	// Called every frame
	virtual void Tick(float DeltaTime) override;

	// Called to bind functionality to input
	virtual void SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent) override;

	UFUNCTION()
	virtual void OnOverlapBegin(class UPrimitiveComponent* OverlappedComp, class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult);
};

MyCharacter.cpp

// Fill out your copyright notice in the Description page of Project Settings.

#include "MyCharacter.h"
#include "Camera/CameraComponent.h"
#include "Components/CapsuleComponent.h"
#include "Components/InputComponent.h"
#include "Engine/World.h"


// Sets default values
AMyCharacter::AMyCharacter()
{
 	// Set this character to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
	PrimaryActorTick.bCanEverTick = true;

	BaseTurnRate = 45.f;
	BaseLookUpRate = 45.f;

	FirstPersonCameraComponent = CreateDefaultSubobject<UCameraComponent>(TEXT("FPPCamera"));		//Assigning the camera
	FirstPersonCameraComponent->SetupAttachment(GetCapsuleComponent());
	FirstPersonCameraComponent->RelativeLocation = FVector(-39.56f, 1.75f, 64.f); // Position the camera
	FirstPersonCameraComponent->bUsePawnControlRotation = true;

	CollisionCapsule = GetCapsuleComponent();
	CollisionCapsule->OnComponentBeginOverlap.AddDynamic(this, &AMyCharacter::OnOverlapBegin);

}

// Called when the game starts or when spawned
void AMyCharacter::BeginPlay()
{
	Super::BeginPlay();
	
}

// Called every frame
void AMyCharacter::Tick(float DeltaTime)
{
	Super::Tick(DeltaTime);

}

// Called to bind functionality to input
void AMyCharacter::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
{
	Super::SetupPlayerInputComponent(PlayerInputComponent);

	check(PlayerInputComponent);

	//Bind the DoorAction Event
	PlayerInputComponent->BindAction("DoorAction", IE_Pressed, this, &AMyCharacter::DoorAction);

	// Bind jump events
	PlayerInputComponent->BindAction("Jump", IE_Pressed, this, &ACharacter::Jump);
	PlayerInputComponent->BindAction("Jump", IE_Released, this, &ACharacter::StopJumping);

	// Bind movement events
	PlayerInputComponent->BindAxis("MoveForward", this, &AMyCharacter::MoveForward);
	PlayerInputComponent->BindAxis("MoveRight", this, &AMyCharacter::MoveRight);

	//Binding The Mouse Axis events
	PlayerInputComponent->BindAxis("Turn", this, &APawn::AddControllerYawInput);
	PlayerInputComponent->BindAxis("LookUp", this, &APawn::AddControllerPitchInput);
}

void AMyCharacter::MoveForward(float Val)
{
	if (Val != 0.0f)
	{
		AddMovementInput(GetActorForwardVector(), Val);
	}
}

void AMyCharacter::MoveRight(float Val)
{
	if (Val != 0.0f)
	{
		AddMovementInput(GetActorRightVector(), Val);
	}
}

void AMyCharacter::DoorAction()
{
	UE_LOG(LogTemp, Warning, TEXT("E Pressed"));
}

void AMyCharacter::OnOverlapBegin(class UPrimitiveComponent* OverlappedComp, class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult)
{
	UE_LOG(LogTemp, Warning, TEXT("Overlap Begins"));
}
2

Try moving where you assign the begin overlap to begin play

3

Thanks That Fixed the Problem.

But i would like to know why it worked on Begin Play and not through the constructor

4

The constructor is run when the class is created. So the event your are assigning doesn’t exist during the constructor but does during begin play.

5

Thanks a lot.