HEX RTS strategy | Solved | The problem with touching the rays of the mesh

Hello!

I am writing a HEX RTS strategy for this lesson - https://catlikecoding.com/unity/tutorials/hex-map/part-1/, doing the same thing. Camera emission does not work.

An error pops up in the console:
NullReferenceException: Object reference not set to an instance of an object
on this line:

Code (CSharp):

1. Ray inputRay = Camera.main.ScreenPointToRay (Input.mousePosition);

At the same time, I added a collider to the grid, in Awake (), so that there was something to face:

Code (CSharp):

1. meshCollider = gameObject.AddComponent <MeshCollider> ();

And at the end of the method that deals with triangulation, made an assignment:

Code (CSharp):

1. // after the triangulation is complete, assign a mesh to the collider
2. meshCollider.sharedMesh = hexMesh;

Tell me what could be the problem?

Project: https://drive.google.com/file/d/1kuy009sQ0sQYHkAsaMg_BYPqzqADoCeU/view?usp=sharing

 

What is on line 40 of HexMesh.cs?

 

Code (CSharp):

1. Ray inputRay = Camera.main.ScreenPointToRay(Input.mousePosition);

If anything, the project can be downloaded from Google Drive using the link in the post.

 

OMG, solved. Thanks to PanicEnsues and everyone.

I spent half a day on this.
I have one camera in the project - the main one.
I checked that the script is assigned to the desired object.
I explicitly assigned the main camera to a variable.

This did not help.

To identify the camera, I needed to write this:
(GameObject.Find ("Main Camera"). GetComponent <Camera> ()).

Final code:

Code (CSharp):

1.  
2.     void Update()
3.     {
4.         // handle when the mouse button is held down
5.         if (Input.GetMouseButton(0))
6.         {
7.             HandleInput();
8.         }
9.     }
10.  
11.     // executed when the mouse button is held down
12.     void HandleInput()
13.     {
14.         // structure that contains information about the hit and the point of contact
15.         RaycastHit hit;
16.         // throw the beam from the camera onto the stage
17.         Ray inputRay = (GameObject.Find("Main Camera").GetComponent<Camera>()).ScreenPointToRay(Input.mousePosition);
18.         // if the beam collides with something, extract the MeshDeformer component from the object that was hit
19.         if (Physics.Raycast(inputRay, out hit))
20.         {
21.             TouchCell(hit.point);
22.         }
23.     }

 

Great, glad you found it!

For performance purposes, you might want to make the camera a public variable (e.g. "m_camera") that you can drag/drop your camera onto, then just call it with
Ray inputRay = m_camera.ScreenPointToRay(Input.mousePosition);

-Scott