Not finding sword mesh for AI

Development Programming & Scripting
1

Hi guys)) I’m working on my project with some help from book “Learning C++ by creating games in unreal engine 4”. Book was written for older versions of engine and right now I have a problem with BotCharacter.cpp
the error is

C2248 ACharacter::Mesh: can not address the private member, declared in the class "ACharacter"

#include "Viking_Test.h"
#include "MeleeWeapon.h"
#include "BotCharacter.h"
#include "Viking_TestCharacter.h"
#include "Engine/SkeletalMeshSocket.h"

void ABotCharacter::PostInitializeComponents()
{
	Super::PostInitializeComponents();
	if (BPMeleeWeapon)
	{
		MeleeWeapon = GetWorld()->SpawnActor<AMeleeWeapon>(
			BPMeleeWeapon, FVector(), FRotator());
		if (MeleeWeapon)
		{
			const USkeletalMeshSocket* socket = Mesh -> GetSocketByName(
				"RightHandSocket");  // Here error with mesh
			socket->AttachActor(MeleeWeapon, Mesh);// and here too
		}
	}
}

botCharacter.h

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

#pragma once

#include "GameFramework/Character.h"
#include "BotCharacter.generated.h"

UCLASS()
class VIKING_TEST_API ABotCharacter : public ACharacter
{
	GENERATED_BODY()

public:
	ABotCharacter(const FObjectInitializer& ObjectInitializer);

	virtual void BeginPlay() override;

	virtual void Tick( float DeltaSeconds ) override;

	virtual void SetupPlayerInputComponent(class UInputComponent* InputComponent) override;

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = BotProperties)
		float Speed;
	
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = BotProperties)
		float HitPoints;

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = BotProperties)
		int32 Experience;

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = BotProperties)
		UClass* BPLoot;

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = BotProperties)
		float BaseAttackDamage;

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = BotProperties)
		float AttackTimeout;

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = BotProperties)
		float TimeSinceLastStrike;

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = BotProperties)
		USphereComponent* SightSphere;

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = BotProperties)
		USphereComponent* AttackRangeSphere;

	inline bool isInSightRange(float d)
	{
		return d < SightSphere->GetScaledSphereRadius();
	}
	inline bool isInAttackRange(float d)
	{
		return d < AttackRangeSphere->GetScaledSphereRadius();
	}

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = MonsterProperties)
		UClass* BPMeleeWeapon;

	AActor* MeleeWeapon;

	virtual void PostInitializeComponents() override;
};

meleeWeapon.p

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

#pragma once

#include "GameFramework/Actor.h"
#include "MeleeWeapon.generated.h"

UCLASS()
class VIKING_TEST_API AMeleeWeapon : public AActor
{
	GENERATED_BODY()
	
public:	
	AMeleeWeapon(const FObjectInitializer& ObjectInitializer);

	virtual void BeginPlay() override;
	
	virtual void Tick( float DeltaSeconds ) override;

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = MeleeWeapon)
		float AttackDamage;

	TArray<AActor*> ThingsHit;

	bool Swinging;

	class ABotCharacter *WeaponHolder;

	UPROPERTY(VisibleDefaultsOnly, BlueprintReadOnly, Category =
		MeleeWeapon)
		UBoxComponent* ProxBox;

	UPROPERTY(VisibleDefaultsOnly, BlueprintReadOnly, Category =
		MeleeWeapon)
		UStaticMeshComponent* Mesh;

	UFUNCTION(BlueprintNativeEvent, Category = Collision)
		void Prox(AActor* OtherActor, UPrimitiveComponent* OtherComp, int32
			OtherBodyIndex, bool bFromSweep, const FHitResult & SweepResult);

	void Swing();

	void Rest();
};
2

You just need to use GetMesh() instead of directly accessing “Mesh”.

The Mesh variable was made private in a recent release meaning you cannot access it directly anymore.

It is a common coding pattern to use accessors (GetMyVariable() / SetMyVariable(…)) to provide controlled access to private variables so that users of the class don’t accidentally change the pointer reference (for example) or mess things up in other ways.

3

Oh thank you))
but i wonder how to add the sword to my bot, because it didn’t worked

4

It’s hard to say why the sword wasn’t added without looking at your setup, there could be a number of different reasons.

For example, did you remember to setup the socket “RightHandSocket” which your code is using on the skeleton of your character?

Second, is BPMeleeWeapon pointing to a valid value and if it is does it have a proper mesh setup for the sword?

I recommend slowly working your way through every single aspect of the setup to verify if you’ve missed something. Try debugging the code by putting a breakpoint in PostInitializeComponents and observe what happens.