CODEWITHSUNDEEP
c#unity-game-enginenullreferenceexception
Tarik Mokafih
Tarik Mokafih

Reputation: 1257

Null reference exception after instantiating a light gameobject

I coded a class, where I declare a Light as an attribute. In the constructor I instantiate the Light object before using it, but I got the null reference exception at the line after the instantiation (NodeLight.type = LightType.Spot;).

 using UnityEngine;
 using System.Collections;

 public class Node{

     public bool walkable;
     public Vector3 worldPosition;
     public bool Selected;
     public Light NodeLight;

     public Node(bool _walkable, Vector3 _worldPos) {
         Selected = false;
         walkable = _walkable;
         worldPosition = _worldPos;
         NodeLight = new Light();
         NodeLight.type = LightType.Spot;
         NodeLight.transform.position = new Vector3(worldPosition.x, worldPosition.y + 3f, worldPosition.z);
         NodeLight.enabled = false;
     }
 }

Thank you for your help

Upvotes: 1

Views: 125

Answers (1)

lase
lase

Reputation: 2634

A Light is a Component, so it should exist within a GameObject.

Have a look at this example from the Unity Docs:

public class ExampleClass : MonoBehaviour {
    void Start() {
        GameObject lightGameObject = new GameObject("The Light");
        Light lightComp = lightGameObject.AddComponent<Light>();
        lightComp.color = Color.blue;
        lightGameObject.transform.position = new Vector3(0, 5, 0);
    }
}

Try this approach, or try adding your NodeLight as a Component of a GameObject, and then changing its position, rather than the individual Light component's.

Upvotes: 2

Related Questions