[Help] Assigning gameobject to a variable with mouseclick

Hi all,

Hoping to get some guidance on what I thought would be a pretty straightforward piece of code. The below throws a null reference exception when I click on the instantiated gameobject (cube).

Code (CSharp):

1. public class SpawnManager : MonoBehaviour
2. {
3.     public GameObject activeCube;
4.     public GameObject cube;
5.  
6.     // Start is called before the first frame update
7.     void Start()
8.     {
9.         InvokeRepeating("CubeSpawn", 0, 5);  
10.     }
11.  
12.     // Update is called once per frame
13.     void Update()
14.     {
15.         if (Input.GetMouseButtonDown(0))
16.         {
17.             Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
18.             RaycastHit hit;
19.  
20.             if(Physics.Raycast(ray, out hit))
21.             {
22.                 activeCube = hit.transform.gameObject;
23.                 Debug.Log(activeCube);
24.             }
25.         }
26.     }
27.  
28.     public void CubeSpawn()
29.     {
30.         Instantiate(cube, transform.position, transform.rotation);
31.     }
32. }

It spawns the cubes ok. I was just hoping to set one of them as 'active' for other functions.

Any help would be appreciated.

Thank you!

 

make sure your cubes have a collider component so rays can find them

 

Try the longer form of Raycast.

Code (csharp):

1. public LayerMask layersToHit;
2. public float distance = 1000f;
3.  
4. if (Physics.Raycast(ray, out RaycastHit hit, distance, layersToHit))

 

Thanks guys, I figured it out.

For anyone who experiences a similar issue - my camera was not tagged as "main camera", which is required for Camera.main.