Trying to generate graph grids in the Editor (not at runtime), but changes are not saved when reloading the scene

General
1
  • A* version: 5.2.5
  • Unity version: 6000.0.29f1

Hi everyone,

I’m trying to generate and crop A* Pathfinding grids directly in the Unity Editor (not at runtime). Everything works perfectly when I press a button in the inspector. Graphs are correctly generated and cropped.

However, when I run a tool that iterates through all my scenes to apply the same operation,the graph modifications are lost when the scenes are reloaded. I’m calling SetDirty, Undo.RecordObject, and EditorSceneManager.MarkSceneDirty, but none of it seems to persist the changes.

Here’s a simplified version of what I’m doing:

        [SerializeField] private AstarPath astar;

#if UNITY_EDITOR
        public void CreateGrids(Vector3 center, Vector2 size)
        {
            RecordObject();
            
            astar.data.ClearGraphs();

             //My logic to calculate grids bounds

            graph.nodeSize = cellSize;
            graph.SetDimensions(gridSize.x, gridSize.y, cellSize);
            graph.center = center;
            graph.Scan();
            Crop(graph);
            SaveModifications();
        }

        private static void Crop(GridGraph grid, int margin = 2)
        {
           //Crop logic
            grid.nodeSize = cellSize;
            grid.SetDimensions(gridSize.x, gridSize.y, cellSize);
            grid.center = center;
            grid.Scan();
        }
        
        public void RecordObject()
        {
            if (Application.isPlaying) return;
            
            UnityEditor.Undo.RegisterCompleteObjectUndo(gameObject, "Modify Path Finding");
        }
        public void SaveModifications()
        {
            if (Application.isPlaying) return;
            
            UnityEditor.EditorUtility.SetDirty(this);
            UnityEditor.EditorUtility.SetDirty(astar);
            
            if(UnityEditor.PrefabUtility.IsPartOfAnyPrefab(gameObject)) 
                UnityEditor.PrefabUtility.RecordPrefabInstancePropertyModifications(gameObject);
            
            UnityEditor.SceneManagement.EditorSceneManager.MarkSceneDirty(gameObject.scene);
        }
#endif
}

When press “Button” in inspector work perfectly, but when using my scene iteration tools no.

    public void IterateAllScenes()
    {
        CreateActions();

        if (actionInstances is not { Count: > 0 }) return;
        
        foreach (var level in allLevels.GetAllLevel())
        {
            var scene = LoadScene(level);
            OnIterateInScene(scene);
        }
        
        PrintResult();
    }

    private Scene LoadScene(LevelData data)
    {
        return EditorSceneManager.OpenScene($"Assets/Scenes/LevelDatabase/Prototype/{data.SceneName}.unity");
    }

    private void OnIterateInScene(Scene scene)
    {
        foreach (var action in actionInstances)
        {
            action.Do(scene);
        }
    }

    public override void Do(Scene inScene)
    {
        var grid = FindInScene<PathFindingManager>(scene, true);
        if(grid == null) return;
        WallToolHelper.GetGroundBound(out var center, out var size);
        grid.CreateGrids(center, size);
        
        EditorSceneManager.MarkSceneDirty(inScene);
        EditorSceneManager.SaveScene(inScene);  
    }
2

So you’re trying to generate graphs during edit mode? What button are you referring to? I think I’m missing a bit of context there.

3

Hi

In edit-mode, you’ll need to save graph data using:

var data = AstarPath.active.data;
data.data = data.SerializeGraphs();
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