How do I remove tiles at mouse pos?

Hello! I am trying to do a system where you can remove tiles with a left-click.
Currently this is my code

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.Tilemaps;
3.  
4. public class TileSpawner : MonoBehaviour
5. {
6.     public Tile GroundTile;
7.     public Tilemap tilemp;
8.  
9.     void Update()
10.     {
11.        
12.         Vector3 point = Camera.main.ScreenToWorldPoint(Input.mousePosition);
13.         if (Input.GetMouseButtonDown(0)) {
14.             Vector3Int selectedTile = tilemp.WorldToCell(point);
15.             tilemp.SetTile(selectedTile, null);
16.         }
17.     }
18. }
19.  

It gives me errors at the

Vector3 point = Camera.main.ScreenToWorldPoint(Input.mousePosition)

"Object reference not set to an instance of an object"
Does anyone know how to fix this problem or is there an easier way to remove tiles at mouse position? Thanks in advance!

 

Do you have a Camera with tag in scene?

And have you assigned a Tilemap to your "tilemp" field?

 

Thanks! This worked, but now I'm getting this error instead at line 14

            Vector3Int selectedTile = tilemp.WorldToCell(point); 

Object reference not set to an instance of an object

 

Okay sorry, I forgot to assign the tilemap, but it won't destroy on the mouse pos.
This video can explain what I mean, this is my code now. And it doesn't give me any errors.

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.Tilemaps;
3.  
4. public class TileSpawner : MonoBehaviour
5. {
6.     public Tile GroundTile;
7.     public Tilemap tilemapLayer1;
8.  
9.     void Update()
10.     {
11.         Vector3 pos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
12.        
13.         if (Input.GetMouseButtonDown(0))
14.         {
15.             Vector3Int selectedTile = tilemapLayer1.WorldToCell(pos);
16.             tilemapLayer1.SetTile(selectedTile, null);
17.         }
18.     }
19. }
20.  

 

@AaronKanaron

Maybe I'm missing something, but to me it feels like you have some other code running that does something with your tilemap... disable player and see how your code works then.

SetTile should remove a tile when you use null as second parameter.
https://docs.unity3d.com/ScriptReference/Tilemaps.Tilemap.SetTile.html

 

Another thing might be your camera.

Seems like in your video, tile always gets removed near the center of screen.

So are you using Perspective or Orthogonal camera?

If you are using Perspective camera, ScreenToWorldPoint won't work like that.

But with Orthogonal camera it should work.

 

It worked when disabling the player. But there is nothing referencing a tilemap in the player script, or any script at all except this one.

 

Thanks so much! The perspective to orthogonal thing worked!

 

NP.

And if you ever need to use perspective camera, look into raycasting colliders. You can convert screen point to ray.

And why not drop a like for my posts?