Question by BluesyPompanno · Jul 28, 2018 at 08:39 AM · camera raycast ray null reference

Camera Ray - NullReferenceException: Object reference not set to an instance of an object

Hello I have a small problem. I have switched to Unity 2018.2.

My problem is I have character controller and I turn the player with mouse. Here is my code

 public float movementSpeed;
     public float walkingSpeed;
     public float runningSpeed;
 
 
 
     Rigidbody rgBody;
     Camera viewCamera;
 
     Vector3 moveAmount;
     
     void Start ()
     {
         rgBody = GetComponent<Rigidbody>();
         viewCamera = Camera.main;
     }
     
     // Update is called once per frame
     void Update ()
     {
         Vector3 input = new Vector3(Input.GetAxisRaw("Horizontal"),0,Input.GetAxisRaw("Vertical"));
         Vector3 inputDir = input.normalized;
 
         bool running = Input.GetKey(KeyCode.LeftShift);
 
         if (running)
         {
             movementSpeed = runningSpeed;
         }
         else
         {
             movementSpeed = walkingSpeed;
         }
 
         moveAmount = inputDir * movementSpeed;
 
         Ray ray = viewCamera.ScreenPointToRay(Input.mousePosition);
         Plane groundPlane = new Plane(Vector3.up, Vector3.zero);
         float rayDistance;
 
         if (groundPlane.Raycast(ray, out rayDistance))
         {
             Vector3 point = ray.GetPoint(rayDistance);
             Debug.DrawLine(ray.origin,point,Color.red);
             transform.LookAt(point);
         }
 
         
     }
 
     private void FixedUpdate()
     {
         rgBody.MovePosition(rgBody.position + moveAmount * Time.fixedDeltaTime);
     }
 }

But when I start the game I get this error "NullReferenceException: Object reference not s et to an instance of an object Hrac_POHYB.Start () (at Assets/SKRIPTY/Hrac_POHYB.cs:24) "

On older versions of Unity this code works but in the 2018.2 Unity it doesn't work. Anybody knows what is wrong ?

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Hellium · Jul 28, 2018 at 08:44 AM 0

Are you sure you have provided the Hrac_POHYB script? There is absolutely no reason the Start function in the provided script could throw a NullReferenceException

BluesyPompanno Hellium · Jul 28, 2018 at 08:56 AM 0

$$anonymous$$y whole script looks like this.It is also the only script in my project. But I have managed to fix that. I had to make viewCamera public and asign camera to it.

But it still doesn't make sense to me why do I get this error. I have even copied whole movement script from Sebastian Lague (link text and even that didn't work,even when I have edited it.(same eror)

This is how my whole script looks like.

using System.Collections; using System.Collections.Generic; using UnityEngine; [RequireComponent(typeof(Rigidbody))] public class Hrac_POHYB : $$anonymous$$onoBehaviour { public float movementSpeed; public float walkingSpeed; public float runningSpeed; Rigidbody rgBody; Camera viewCamera; Vector3 moveAmount; void Start () { rgBody = GetComponent<Rigidbody>(); viewCamera = Camera.main; } // Update is called once per frame void Update () { Vector3 input = new Vector3(Input.GetAxisRaw("Horizontal"),0,Input.GetAxisRaw("Vertical")); Vector3 inputDir = input.normalized; bool running = Input.Get$$anonymous$$ey($$anonymous$$eyCode.LeftShift); if (running) { movementSpeed = runningSpeed; } else { movementSpeed = walkingSpeed; } moveAmount = inputDir * movementSpeed; Ray ray = viewCamera.ScreenPointToRay(Input.mousePosition); Plane groundPlane = new Plane(Vector3.up, Vector3.zero); float rayDistance; if (groundPlane.Raycast(ray, out rayDistance)) { Vector3 point = ray.GetPoint(rayDistance); Debug.DrawLine(ray.origin,point,Color.red); transform.LookAt(point); } } private void FixedUpdate() { rgBody.$$anonymous$$ovePosition(rgBody.position + moveAmount * Time.fixedDeltaTime); } }

Hellium BluesyPompanno · Jul 28, 2018 at 09:01 AM 1

Have you tried to: