How to attach component to socket with C++ at compile time?

Development Programming & Scripting
1

Hi everyone!

I’m a bit of a newbie at C++ and UE4, so I’ve been working on my knight/paladin character recently, and I’ve come across an error, hope you guys can help me out.

So, on my character, I have a scenecomponent that I have declared and initialized in my C++ code which holds 2 static meshes, a sword and a sheath(sword cover), I want that scenecomponent to attach to a socket of my choice at compile time and also at runtime(when a key is pressed(in the future)), I have also created a blueprint from that character code of mine. If I click on the scenecomponent in the blueprint editor there is no text box where I can type in the socket name unlike when I create a scenecomponent from inside the Blueprint editor, it will have a text box to type in the Socket name. So I tried attaching the scenecomponent to the socket from inside my constructor after initializing it. But as it seems now, it didn’t really work, I can say that because when I run the game, the sword and the sheathe stay still in a place while my character plays the run animation instead of moving with the character, I mean it does move with the character, but it does not stay attached to its waist like its blueprint initialized counter part(another scenecomponet with a static mesh of a sword in it which I added directly in the blueprint editor).

Here is my constructor code, hope you guys can help me:-

//Constructor
APlayerCharacter::APlayerCharacter()
{
	//Setup the components
	//Root = CreateDefaultSubobject<USceneComponent>(TEXT("Root"));
	//RootComponent = Root;
	
	//Seathe Socket
	Seathe_Socket = CreateDefaultSubobject<USceneComponent>(TEXT("Seathe_Socket"));
	Seathe_Socket->SetupAttachment(GetMesh(), FName (TEXT("SwordInSeatheSocket")));
	
	

	//SwordInHand Socket
	SwordInHand_Socket = CreateDefaultSubobject<USceneComponent>(TEXT("SwordInHand_Socket"));
	SwordInHand_Socket->SetupAttachment(GetMesh());

	//LongSword
	LongSword = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("LongSword"));
	LongSword->SetupAttachment(Seathe_Socket);

	//LongSwordSeathe
	LongSwordSeathe = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("LongSwordSeathe"));
	LongSwordSeathe->SetupAttachment(Seathe_Socket);
	}
2

This is the way it can be done

In your .h file create an pointer to the weapon class

e.g
class MySwordClassActor* CWeapon;

In your Character/Pawn/Knight Class call the weapon class

#include <MySwordClassActor.h>

void KnightClass::OnBeginPlay()
{
    CWeapon = //Spawn the weapon of MySwordClass into the world
    

    //Attach CWeapon to The socket location
}
3

OnBeginPlay is not a valid function. its BeginPlay.

4

MyBad its BeginPlay()

5

You have just commented out stuff, could you tell me what lines of code to actually use to do the things you commented out?

1 Like
6

You have just commented out stuff, could you tell me what lines of code to actually use to do the things you commented out?

And the weapon is just a static mesh component, not an actor.

7

In the .h file of Pawn

public :

//Your Socket name that you added in persona to the character for editable via blueprint
UPROPERTY(EditDefaultsOnly, Category = "Socket")
	FName CustomSocket;

//Your Knight or Paladin Mesh on which the attachment os to be done
	UPROPERTY(EditDefaultsOnly, Category = "HatMesh")
	class USkeletalMeshComponent* PlayerMesh;

//The Mesh that is to be attached onto the player
	UPROPERTY(EditDefaultsOnly, Category = "HatMesh")
	class UStaticMeshComponent* HatMesh;

In .cpp file of Pawn

//Constructor function
AMyPawn::AMyPawn()
{
 	// Set this pawn to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
	PrimaryActorTick.bCanEverTick = true;

//Adding a default socket name
	CustomSocket = "PropSocket";

//Creating the player mesh and setting it as root(Generally root is the collision capsule)
	PlayerMesh = CreateDefaultSubobject<USkeletalMeshComponent>(TEXT("PlayerMesh"));
	RootComponent = PlayerMesh;

//Creating the mesh  to be attached
	HatMesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("HatMesh"));
	HatMesh->SetMobility(EComponentMobility::Movable);
	HatMesh->SetupAttachment(RootComponent);
}

// Called when the game starts or when spawned
void AMyPawn::BeginPlay()
{
	Super::BeginPlay();
	
//Attaching the mesh to the player
	HatMesh->AttachTo(PlayerMesh, CustomSocket, EAttachLocation::SnapToTarget, false);

}