NullReferenceException: Object reference not set to an instance of an object CameraOrbit.LateUpdate

Unity Engine
1

i have been working on camera orb and i wound this code and erroe aperrs .FIX?

public class CameraOrbit : MonoBehaviour
{

    protected Transform _XForm_Camera;
    protected Transform _XForm_Parent;

    protected Vector3 _LocalRotation;
    protected float _CameraDistance = 10f;

    public float MouseSensitivity = 4f;
    public float ScrollSensitvity = 2f;
    public float OrbitDampening = 10f;
    public float ScrollDampening = 6f;

    public bool CameraDisabled = false;


    // Use this for initialization
    void Start()
    {
        this._XForm_Camera = this.transform;
        this._XForm_Parent = this.transform.parent;
    }


    void LateUpdate()
    {
        if (Input.GetKeyDown(KeyCode.LeftShift))
            CameraDisabled = !CameraDisabled;

        if (!CameraDisabled)
        {
            //Rotation of the Camera based on Mouse Coordinates
            if (Input.GetAxis("Mouse X") != 0 || Input.GetAxis("Mouse Y") != 0)
            {
                _LocalRotation.x += Input.GetAxis("Mouse X") * MouseSensitivity;
                _LocalRotation.y += Input.GetAxis("Mouse Y") * MouseSensitivity;

                //Clamp the y Rotation to horizon and not flipping over at the top
                if (_LocalRotation.y < 0f)
                    _LocalRotation.y = 0f;
                else if (_LocalRotation.y > 90f)
                    _LocalRotation.y = 90f;
            }
            //Zooming Input from our Mouse Scroll Wheel
            if (Input.GetAxis("Mouse ScrollWheel") != 0f)
            {
                float ScrollAmount = Input.GetAxis("Mouse ScrollWheel") * ScrollSensitvity;

                ScrollAmount *= (this._CameraDistance * 0.3f);

                this._CameraDistance += ScrollAmount * -1f;

                this._CameraDistance = Mathf.Clamp(this._CameraDistance, 1.5f, 100f);
            }
        }

        //Actual Camera Rig Transformations
        Quaternion QT = Quaternion.Euler(_LocalRotation.y, _LocalRotation.x, 0);
        this._XForm_Parent.rotation = Quaternion.Lerp(this._XForm_Parent.rotation, QT, Time.deltaTime * OrbitDampening);

        if (this._XForm_Camera.localPosition.z != this._CameraDistance * -1f)
        {
            this._XForm_Camera.localPosition = new Vector3(0f, 0f, Mathf.Lerp(this._XForm_Camera.localPosition.z, this._CameraDistance * -1f, Time.deltaTime * ScrollDampening));
        }
    }
}

and error apper
public class CameraOrbit : MonoBehaviour
{

    protected Transform _XForm_Camera;
    protected Transform _XForm_Parent;

    protected Vector3 _LocalRotation;
    protected float _CameraDistance = 10f;

    public float MouseSensitivity = 4f;
    public float ScrollSensitvity = 2f;
    public float OrbitDampening = 10f;
    public float ScrollDampening = 6f;

    public bool CameraDisabled = false;


    // Use this for initialization
    void Start()
    {
        this._XForm_Camera = this.transform;
        this._XForm_Parent = this.transform.parent;
    }


    void LateUpdate()
    {
        if (Input.GetKeyDown(KeyCode.LeftShift))
            CameraDisabled = !CameraDisabled;

        if (!CameraDisabled)
        {
            //Rotation of the Camera based on Mouse Coordinates
            if (Input.GetAxis("Mouse X") != 0 || Input.GetAxis("Mouse Y") != 0)
            {
                _LocalRotation.x += Input.GetAxis("Mouse X") * MouseSensitivity;
                _LocalRotation.y += Input.GetAxis("Mouse Y") * MouseSensitivity;

                //Clamp the y Rotation to horizon and not flipping over at the top
                if (_LocalRotation.y < 0f)
                    _LocalRotation.y = 0f;
                else if (_LocalRotation.y > 90f)
                    _LocalRotation.y = 90f;
            }
            //Zooming Input from our Mouse Scroll Wheel
            if (Input.GetAxis("Mouse ScrollWheel") != 0f)
            {
                float ScrollAmount = Input.GetAxis("Mouse ScrollWheel") * ScrollSensitvity;

                ScrollAmount *= (this._CameraDistance * 0.3f);

                this._CameraDistance += ScrollAmount * -1f;

                this._CameraDistance = Mathf.Clamp(this._CameraDistance, 1.5f, 100f);
            }
        }

        //Actual Camera Rig Transformations
        Quaternion QT = Quaternion.Euler(_LocalRotation.y, _LocalRotation.x, 0);
        this._XForm_Parent.rotation = Quaternion.Lerp(this._XForm_Parent.rotation, QT, Time.deltaTime * OrbitDampening);

        if (this._XForm_Camera.localPosition.z != this._CameraDistance * -1f)
        {
            this._XForm_Camera.localPosition = new Vector3(0f, 0f, Mathf.Lerp(this._XForm_Camera.localPosition.z, this._CameraDistance * -1f, Time.deltaTime * ScrollDampening));
        }
    }
}
2

Copy and paste the error as it gives you a line number. Otherwise, it’s a null reference error. The fix is the same as always. Find out what is null and make it not null or add a check for a null value.

3

The answer is always the same… ALWAYS. It is the single most common error ever. Don’t waste your life on this problem. Instead, learn how to fix it fast… it’s EASY!!

Some notes on how to fix a NullReferenceException error in Unity3D

  • also known as: Unassigned Reference Exception
  • also known as: Missing Reference Exception

http://plbm.com/?p=221

The basic steps outlined above are:

  • Identify what is null
  • Identify why it is null
  • Fix that.

Expect to see this error a LOT. It’s easily the most common thing to do when working. Learn how to fix it rapidly. It’s easy. See the above link for more tips.

This is the kind of mindset and thinking process you need to bring to this problem:

Step by step, break it down, find the problem.

How to understand errors in general: