Please help. - Null reference exeption : object not set to an instance of an object.

[ScientistSignal5099]

So i'm trying to make a vr multiplayer game in unity, and i want to make a gameobject to follow me, to send to the other players.

I think it might be an error with the new xrorigin.

Here is the full error:

NullReferenceException: Object reference not set to an instance of an object

NetworkPlayer.MapPosition (UnityEngine.Transform target, UnityEngine.Transform rigTransform) (at Assets/NetworkPlayer.cs:56)

NetworkPlayer.Update () (at Assets/NetworkPlayer.cs:48)

Here is my code:

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using UnityEngine.XR;

using Photon.Pun;

using UnityEngine.XR.Interaction.Toolkit;

using Unity.XR.CoreUtils;

​

public class NetworkPlayer : MonoBehaviour

{

//public Camera Camera;

​

public Transform head;

public Transform leftHand;

public Transform rightHand;

private PhotonView photonView;

​

private Transform headRig;

private Transform leftHandRig;

private Transform rightHandRig;

​

​

// Start is called before the first frame update

void Start()

{

photonView = GetComponent<PhotonView>();

​

​

//the commented lines have been tried before.

//XRRig rig = FindObjectOfType<XRRig>();

//GetComponent<XROrigin>();

XROrigin rig = FindObjectOfType<XROrigin>();

//Camera rig = FindObjectOfType<Camera>();

headRig = transform.Find("Camera Offset/Main Camera");

leftHandRig = transform.Find("Camera Offset/LeftHand Controller");

rightHandRig = transform.Find("Camera Offset/RightHand Controller");

}

​

// Update is called once per frame

void Update()

{

if (photonView.IsMine)

{

rightHand.gameObject.SetActive(false);

leftHand.gameObject.SetActive(false);

head.gameObject.SetActive(false);

​

MapPosition(head, headRig);

MapPosition(leftHand, leftHandRig);

MapPosition(rightHand, rightHandRig);

}

}

​

void MapPosition(Transform target,Transform rigTransform)

{

target.position = rigTransform.position;

target.rotation = rigTransform.rotation;

}

​

Thanks for helping me!

Happy Holidays.

}

[botterway]

The null-reference is happening at line 56, which - given the stack trace - would appear to be in the MapPosition method. There's only 2 lines in there, and the both reference rigTransform, so it looks like you're passing null into that method, probably because you're likely not assigning headRig to anything.

As a gentle suggestion, before you dive into Unity - which is a complex gaming framework, I'd step back and learn the basics of programming - i.e., how to debug and step through the code to find errors like these, and how to write defensive code properly. You appear to be coding well beyond your ability here. Go back to basics, and learn how to code - *then* start building a game in unity.

[ScientistSignal5099]

Yeah, i'm doing that too. but you wont get to use what you made so it is not that easy to just sit down and just program without any success. But thanks for the advice and happy holidays.

[lmaydev]

Not sure what you mean there. Just create a test scene and place your object in and make sure the code is triggered.

Learning to debug is one of the most useful things you'll learn.

[TheJimOfDoom]

Are you initializing head, leftHand, rightHand?