How to replace a TileMap Gameobject?

Hey,

I’m currently working on a game with a GameObject tilemap (It's a 3D Game).
Now I want to use a script to replace the GameObject which was selected with a Mouseclick.
Unfortunately, I couldn't found anything about how to change the GameObject.

Can somebody help me with that?

This is my code to Check where the Player has clicked:

Code (CSharp):

1. public Tilemap tilemap;
2.  
3. void Update() {
4.     if (Input.GetMouseButtonDown(0)) {
5.         RaycastHit hit;
6.         Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
7.         if (Physics.Raycast(ray, out hit)) {
8.             //Replace Gameobject in Tilemap
9.         }
10.     }
11. }

 

Tilemap extends GridLayout so I think you probably want to use the GriLayout API rather than ray casting to transform world/local coordinates to grid coordinates, then use the tilemap's API with those grid cell coords to modify the tiles:

https://docs.unity3d.com/ScriptReference/GridLayout.html
https://docs.unity3d.com/ScriptReference/Tilemaps.Tilemap.html

 

Hey

Thank you for your answer.
I have now removed the ray casting and added the grid coordinates.
Unfortunately, I can’t find how to change the GameObject. For 2D tilemaps I found it, but the function needs a tile and not a GameObject.

Code (CSharp):

1. public Tilemap tilemap;
2. public GameObject newObject;
3.  
4. void Update() {
5.     if (Input.GetMouseButtonDown(0)) {
6.         Vector3 position = Camera.main.ScreenToWorldPoint(Input.mousePosition);
7.         tilemap.SetTile(tilemap.WorldToCell(position), newObject);
8.     }
9. }

 

No, I don’t follow a tutorial, I just used the two docs that were posted here.
Let me explain what I’m trying to do.

I have a tilemap with GameObjects. Like in this Video.

Now I want to click on a tile to replace this with another tile.

For example: I click on a Grass Tile and it changes this Tile to a Path tile.
I’d like to know how to do that.

If I understand the docs correctly, I can convert the position where I clicked in the world with "WorldToCell(position)" into the Tile Coordinate and then change the Tile.

 

Update:

Code (CSharp):

1. public Tilemap tilemap;
2. public GridLayout gridLayout;
3.  
4. public GameObject newObject;
5.  
6. void Start() {
7.     Tilemap tilemap = GetComponent<Tilemap>();
8. }
9.  
10. void Update() {
11.     if (Input.GetMouseButtonDown(0)) {
12.         Plane plane = new Plane(Vector3.up, 0);
13.  
14.         float distance;
15.         Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
16.  
17.         if (plane.Raycast(ray, out distance)) {
18.             Vector3 worldPosition = ray.GetPoint(distance);
19.             Debug.Log("World Position: " + worldPosition);
20.  
21.             Vector3 gridCell = gridLayout.WorldToCell(worldPosition);
22.             Debug.Log("Grid Cell: " + gridCell);
23.  
24.             Vector3Int gridCellInt = Vector3Int.FloorToInt(gridCell);
25.             Debug.Log("Output: " + tilemap.GetTile(gridCellInt));
26.         }
27.     }
28. }

I have edited the code and now it returns the exact gridCell of the tile
Example: (1.00, -6.00, 0.00)

Unfortunately I couldn’t find anything to replace a GameObject tiles.
Does anyone know how to do that or if it’s even possible?