pointer to incomplete class type "UCharacterMovementComponent" is not allowed

Development Programming & Scripting
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1

Hello everyone, I am trying to create a battle royale game, for idle, walk and sprint, I am getting two errors in my C++ code,

pointer to incomplete class type “UCharacterMovementComponent” is not allowed

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image1716×967 122 KB

Here is the code of Onyx.h

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

#pragma once

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

UCLASS()
class MYBG_API AOnyx : public ACharacter
{
	GENERATED_BODY()

public:
	// Sets default values for this character's properties
	AOnyx();

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

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

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

	//Public Variables
	//Define Input key for MoveForwardKey
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "BR Variables")
	FString MoveForwardKey;
	//Define Input key for MoveRight
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "BR Variables")
	FString MoveRightKey;
	//Define Input key for Turn
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "BR Variables")
	FString TurnKey;
	//Define Input key for LookUp
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "BR Variables")
	FString LookUpKey;
	//Define Input key for Sprint
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "BR Variables")
	FString SprintKey;

	//Max Walk Speed
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "BR Variables")
	float MaxWalkSpeed;
	//Max Sprint Speed
	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "BR Variables")
	float MaxSprintSpeed;

protected:
	void MoveForward(float AxisVal);
	void MoveRight(float AxisVal);
	void LookUp(float AxisVal);
	void Turn(float AxisVal);
	void Jump();
	void Sprint();

	UPROPERTY(BlueprintReadOnly, VisibleAnywhere, meta = (AllowPrivateAccess = true))
	bool bPlayerIsSprinting;

};

Here is the code for onyx.cpp

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


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


// Sets default values
AOnyx::AOnyx()
{
 	// 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;

}

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

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

}

// Called to bind functionality to input
void AOnyx::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
{
	Super::SetupPlayerInputComponent(PlayerInputComponent);
	PlayerInputComponent->BindAxis(FName(*MoveForwardKey), this, &AOnyx::MoveForward);
	PlayerInputComponent->BindAxis(FName(*MoveRightKey), this, &AOnyx::MoveRight);
	PlayerInputComponent->BindAxis(FName(*LookUpKey), this, &AOnyx::LookUp);
	PlayerInputComponent->BindAxis(FName(*TurnKey), this, &AOnyx::Turn);
}

void AOnyx::MoveForward(float AxisVal)
{
	AddMovementInput(GetActorForwardVector() * AxisVal);
}

void AOnyx::MoveRight(float AxisVal)
{ 
	AddMovementInput(GetActorRightVector() * AxisVal);
}

void AOnyx::LookUp(float AxisVal)
{
}

void AOnyx::Turn(float AxisVal)
{
}

void AOnyx::Jump()
{
}

void AOnyx::Sprint()
{
	UCharacterMovementComponent* MovementComponentPointer = Cast<UCharacterMovementComponent>(GetMovementComponent());
	if (MovementComponentPointer)
	{
		if (!bPlayerIsSprinting)
		{
			bPlayerIsSprinting = false;
			MovementComponentPointer->MaxWalkSpeed = MaxWalkSpeed;
		}
		else
		{
			bPlayerIsSprinting = true;
			MovementComponentPointer->MaxWalkSpeed = MaxSprintSpeed;
		}
	}
}

Please help me how to deal with the error.

2

You have to include it:
#include “GameFramework/CharacterMovementComponent.h”

You can reference it with #include “GameFramework/Character.h”, but you need to include the component itself to do anything with it.

3

Hi, Thank You Very Much for the help. I am new to Unreal Engine and learning to code for Unreal Engine. Thanks a lot.

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