Tilemap.SetTile() not doing anything in editor script

Hi,

I'm trying to generate a tilemap from an editor script. I have gotten as far as generating the tile assets via script from a folder full of images. I know the position of each tile beforehand, so i want to skip the manual creation of a pallette and just instatiate and populate the tilemap in code also (since i already know what positions each tile image should be in).

Creating the parent gameobject with the Grid component, then the child gameobject with the Tilemap component all goes fine. When I then do

Code (CSharp):

1. tilemap.SetTile(position, tile)

nothing seems to happen.

Is this supposed to fail in the editor? If not, am I missing something stupid?

The relevant part of the code is here:

Code (CSharp):

1.  
2. foreach (var tileAsset in tileAssets)
3. {          
4.     var path = tilePath + tileAsset.Name;
5.     var tile = AssetDatabase.LoadAssetAtPath<TerrainTile>(path);
6.     tilemap.SetTile(tile.position, tile);
7. }
8. tilemap.RefreshAllTiles();
9.  

 

if it doesnt do anything it would suggest your have an empty tile, otherwise it should crash

Most likely your LoadAssetAtPath is not working correctly, likely the path is not correct (note that it must be in a folder called Resources). You can seperate the two calls and hardcode each part seperately (eg. set tile from variable in editor) and see which part breaks.

 

I'm having this issue.. with

SetTile(...)

and

SetTilesBlock(...)

.

1. I created a new GameObject from the constructor (completely blank object),
2. I added Tilemap and TilemapRenderer components to it,
3. I tried both

SetTile(...)

and

SetTilesBlock(...)

methods to set tiles with a RuleTile asset, and a Tile asset in my project.

Nothing seems to be working beyond just the first cell at (0, 0, 0).
The tiles don't appear, even after manual calls to

RefreshAllTiles()

.

I've been looking all around the internet and the docs, and have no idea what it's doing. :/

 

@ChuanXin any idea why setting the tiles is not working? Apologies if this is documented somewhere

 

Ahhh no, I was probably really tired..

Short answer: the Tilemap had no parent with a Grid component.

..Welp, this is embarrassing, but I'll leave this up if it helps someone as silly as me in the future. Lol

 

Try

:SetTile();

 

I'm having this problem:

Code (CSharp):

1.  
2.     private void OnGUI()
3.     {
4.         _baseTile = EditorGUILayout.ObjectField("Base Tile", _baseTile, typeof(Tile), false) as Tile;
5.         _map = EditorGUILayout.ObjectField("Map to change", _map, typeof(Tilemap), true) as Tilemap;
6.         if (GUILayout.Button("Change‼"))
7.         {
8.             foreach(Vector3Int position in _map.cellBounds.allPositionsWithin)
9.             {
10.                 if (_map.HasTile(position))
11.                 {
12.                     _map.SetTile(position, _baseTile);
13.                     _map.RefreshTile(position);
14.                 }
15.             }
16.         }
17.     }

When I click the button, it changes all tiles, as expected, but there's no change in the scene, saving does nothing and if I go out of the scene and back, it is the same way it was before

 

In your example, after Line 13, you can mark the scene dirty so the Unity editor knows it's been modified, and a Ctrl +S (afterwards) would save the scene, attempting to close the scene would ask you if you'd like to save, etc.

With

using UnityEditor.SceneManagement;

at the top of your script,

you can then use

EditorSceneManager.MarkSceneDirty(_map.gameObject.scene);

right after Line 13.

 

I'm having this exact problem. The scene does not change, the tilemap remains the same. I'm using an Editor window to perform the tilemap manipulation inside of a prefab scene. It looks like this



The only way to swap the tiles (I'm trying to remove all instanced of MutedGrassRuleTile to null) looks to be to manually remove it. Dunno why.

This is my code

Code (CSharp):

1.  
2.            ...
3.  
4.             Rect rect = EditorGUILayout.GetControlRect(true, 60);
5.             if (GUI.Button(rect.AlignCenter(300, 50),
6.                     "Swap tiles"))
7.             {
8.                 Undo.RecordObject(this.tilemap, "Swapping tiles in tilemap");
9.                 BoundsInt bounds = this.tilemap.cellBounds;
10.                 TileBase[] allTiles = this.tilemap.GetTilesBlock(bounds);
11.                 for (int x = 0; x < bounds.size.x; x++)
12.                 {
13.                     for (int y = 0; y < bounds.size.y; y++)
14.                     {
15.                         TileBase tile = allTiles[x + (y * bounds.size.x)];
16.                         if (tile == this.current)
17.                         {
18.                             this.tilemap.SetTile(new Vector3Int(x, y, 0), this.target);
19.                             Debug.Log($"Replaced tile at ({x}, {y}) with {tile.name}");
20.                         }
21.                     }
22.                 }
23.  
24.                 EditorSceneManager.MarkSceneDirty(SceneManager.GetActiveScene());
25.             }
26.  
27.            ...

 

After a year or so I stumbled upon this same thread and tried to solve the issue with SetTile. We did solve it. The solution was not to use SetTile and instead use SwapTile for swapping out existing things in the Editor script. This is not really a solution to SetTile... sorry folks, but it worked for us.