Null Ref Exeption

Questions & Answers
1

Hi, I started a project then this error came from nowhere, please help me :frowning:
this is my code:

private Transform firstPerson_View;
private Transform firstPerson_Camera;
private Vector3 firstPerson_View_Rotation = Vector3.zero;
private float speed;
private bool is_Moving, is_Grounded, is_Crouching;
private float inputX, inputY;
private float inputX_Set, inputY_Set;
private float inputModifyFactor;
private float antiBumpFactor = 0.75f;
private bool limitDiagonalSpeed;
private CharacterController charController;
private Vector3 moveDirection = Vector3.zero;

public float walkSpeed = 6.75f;
public float runSpeed = 10f;
public float crouchSpeed = 4f;
public float jumpSpeed = 8f;
public float gravity = 20f;

void Start () 
{
	firstPerson_View = transform.Find("FPS View");
	charController = GetComponent<CharacterController>();
	speed = walkSpeed;
	is_Moving = false;
}

void Update () 
{
	PlayerMovement();
}

void PlayerMovement()
{
	if(Input.GetKey(KeyCode.W) || Input.GetKey(KeyCode.S))
	{
		if(Input.GetKey(KeyCode.W)){inputY_Set = 1f;}
		else{inputY_Set = -1f;}
	}
	else{inputY_Set = 0f;}

	if(Input.GetKey(KeyCode.A) || Input.GetKey(KeyCode.D))
	{
		if(Input.GetKey(KeyCode.A)){inputX_Set = -1f;}
		else{inputX_Set = 1f;}
	}
	else{inputX_Set = 0f;}

	inputY = Mathf.Lerp(inputY, inputY_Set, Time.deltaTime * 19f);
	inputX = Mathf.Lerp(inputX, inputX_Set, Time.deltaTime * 19f);

	inputModifyFactor = Mathf.Lerp(inputModifyFactor, (inputY_Set != 0 && inputX_Set != 0 && limitDiagonalSpeed) ? 0.75f : 1.0f , Time.deltaTime * 19f);

	firstPerson_View_Rotation = Vector3.Lerp(firstPerson_View_Rotation, Vector3.zero, Time.deltaTime * 5f);
	firstPerson_View.localEulerAngles = firstPerson_View_Rotation;

	if(is_Grounded)
	{
		moveDirection = new Vector3(inputX * inputModifyFactor, -antiBumpFactor, inputY * inputModifyFactor);
		moveDirection = transform.TransformDirection(moveDirection) * speed;
	}

	moveDirection.y -= gravity * Time.deltaTime;

	is_Grounded = (charController.Move(moveDirection * Time.deltaTime) & CollisionFlags.Below) != 0;

	is_Moving = charController.velocity.magnitude > 0.15f;
}

}

the error code line is:
firstPerson_View.localEulerAngles = firstPerson_View_Rotation;

2

The null reference exception error occurs when a referenced variable is null in your case it’s your

firstPerson_View_Rotation

variable.

The cause of this error would be

     firstPerson_View = transform.Find("FPS View");

Double check the transform that has the script attached and ensure there is a child named FPS View.