Question Has something changed in Physics.OverlapShere() recently?

Hi,

I'm running into a problem where the code for my game is no longer working as expected in Unity 2019 onwards. I'm not sure exactly which version caused it to stope working. I have an editor script that uses Physics.OverlapShere to draw a sphere and detect adjacent Tile objects and then add those to a list of Tile objects called Neighbors. For some reason, in recent versions of Unity, the Neighbors list is always empty despite the code below running:

Code (CSharp):

1. //set neighbour
2.             for(int i=0; i<allTiles.Count; i++){
3.                 Tile hT=allTiles[i];
4.                 Vector3 pos=hT.transform.position;
5.                 Collider[] cols=Physics.OverlapSphere(pos, gridSize*gridToTileSizeRatio*0.6f);
6.                 List<Tile> neighbour=new List<Tile>();
7.                 foreach(Collider col in cols){
8.                     Tile hTile=col.gameObject.GetComponent<Tile>();
9.                     if(hTile!=null && hT!=hTile){
10.                         neighbour.Add(hTile);
11.                     }
12.                 }
13.                 hT.SetNeighbours(neighbour);
14.             }

Can anyone tell me what I need to change to get this working? The code has no compile errors, it just doesn't find any of the tiles and add them as it does in older versions of Unity.

 

Can't really give you any advice other than normal debugging advice. Usually in these situations you've changed something else in your project that you thought was minor or unrelated and turned out to affect this.

In your case, either step through with a debugger or add some longs. This is the information you should focus on:

• Is this code running at all?
• What, if anything, is in the

  cols

  array returned from OverlapSphere?
• What is the value of

  hT

  at the time?
• Why are tiles from cols not making it through the is statement on line 9?

 

Thanks ... will do. You're probably right. What I'm noticing is that all the tiles in the grid (allTiles) are added as neighbours to one of the tiles only.

 

Turns out it was the same issue as this person ran into:

Physics.OverlapSphere issue - Unity Forum

So I did the same thing he did and split out the process to have one button create the grid of tiles and then another button to populate their neighbours and the code worked fine.