Getting clicked tile coordinates from Custom Editor

Question

Hello guys. I'm making a custom editor for my top down 2d game, that, as a part of its functionality, should determine which tile on the grid I click in the Scene view. Converting click coordinates to grid position works flawlessly in my runtime Monobehavior scripts that use main camera.

However when I try to do it from custom editor, the values are off.

Here is my code (the CustomTileInspector script is a Monobehavior attached to the tilemap):

 [CustomEditor(typeof(CustomTileInspector))]
 
 public class MyTileEditor : Editor
 
 {
 
 void OnSceneGUI()
 
 {
 
 Event current = Event.current;
 
 if (current.type == EventType.MouseDown && current.button == 1)
 
 {
 
 Vector3 mousePosition = current.mousePosition;
 
 Camera sceneCamera = SceneView.currentDrawingSceneView.camera
 ;
 
 
 
 mousePosition.y = sceneCamera.pixelHeight - mousePosition.y;
 
 mousePosition = sceneCamera.ScreenToWorldPoint(mousePosition);
 
 mousePosition.y = -mousePosition.y;
 
 var Pos = new Vector3Int(Mathf.RoundToInt(mousePosition.x),
 Mathf.RoundToInt(mousePosition.y), 0);
 
 Debug.Log
 ("mouse clicked at "+ Pos.x+","+Pos.y);
 
 }
 
 }

The reported coordinates are off and don't seem to correlate to the Grid properly. Moreover, when I pan the camera the values change, even when I click on the same tile. I'm completely lost and would appreciate any insights on what I am doing wrong.

Answer 1

Best Answer

Answer by blu3drag0n · Nov 02, 2019 at 09:53 AM

 using UnityEditor;
 using UnityEngine;
 
 [ExecuteInEditMode]
 public class GetTilemapCoordinate : MonoBehaviour
 {
     public Grid grid;
 
     public GetTilemapCoordinate()
     {
         SceneView.duringSceneGui += GetMousePosition;
     }
 
     public void GetMousePosition(SceneView scene)
     {
         Event e = Event.current;
         if (e != null)
         {
             if (Event.current.type == EventType.MouseDown)
             {
 
                 Vector3Int position = Vector3Int.FloorToInt(HandleUtility.GUIPointToWorldRay(Event.current.mousePosition).origin);
                 Vector3Int cellPos = grid.WorldToCell(position);
                
                 Debug.Log(cellPos);
             }
         }
     }
 }

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CheekySparrow78 · Dec 03, 2019 at 03:01 AM 0

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You are truly a boon to the community, blu3drag0n! Thank you, this works flawlessly.

Getting clicked tile coordinates from Custom Editor

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