Root Component in Blueprint still DefaultSceneRoot after assigned RootComponent in C++

[TH-Vincent]

Hello, I am new to Unreal here. I try to learn and replicate the projectile in first-person shooter. I make USphereComponent in .h and set as root component in .cpp as follows:

MyProjectile.h:

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

	UPROPERTY(VisibleDefaultsOnly, Category = Projectile)
		class USphereComponent* CollisionSphere;

	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = Movement)
		class UProjectileMovementComponent* ProjectileMovement;

	UFUNCTION()
		void OnHit(UPrimitiveComponent* HitComp, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& Hit);

	UPROPERTY(EditAnywhere)
		float DamageValue = 20.0;

MyProjectile.cpp:

#include "MyProjectile.h"

#include "Components/SphereComponent.h"
#include "GameFramework/ProjectileMovementComponent.h"

// Sets default values
AMyProjectile::AMyProjectile()
{
 	// Set this actor to call Tick() every frame.  You can turn this off to improve performance if you dont need it.

	PrimaryActorTick.bCanEverTick = true;

	CollisionSphere = CreateDefaultSubobject<USphereComponent>(TEXT("Sphere Collision"));
	CollisionSphere->InitSphereRadius(20.0f);
	RootComponent = CollisionSphere;

	ProjectileMovement = CreateDefaultSubobject<UProjectileMovementComponent>(TEXT("Projectile Movement"));
	ProjectileMovement->UpdatedComponent = CollisionSphere;
	ProjectileMovement->InitialSpeed = 3000.0f;
	ProjectileMovement->MaxSpeed = 3000.0f;
	ProjectileMovement->bRotationFollowsVelocity = true;
	ProjectileMovement->bShouldBounce = true;

	InitialLifeSpan = 3.0f;

}

However, after I create blueprint from this class. The root component still shown as “DefaultSceneRoot”.

I already doubled-check from tutorial but I am not sure what I am missing. I use Unreal 5.1 followed tutorial from Unreal Engine & C++ Tutorial - 1st Person Shooter Game (youtube.com).

If you want any information, feel free to ask. Thanks!

[nande]

on MyProject.cpp you need to do SetRootComponent(CollisionSphere) instead of just assigning it.

though your actual problem is likely the uproperty definition

UPROPERTY(BlueprintReadOnly, VisibleDefaultsOnly, Category = Projectile)
		class USphereComponent* CollisionSphere = nullptr;

add the BPReadOnly and try that.

[TH-Vincent]

Thank you.