ClearIsoObjectTransformsAction.cs

using UnityEngine;
using UnityEditor;
using UnityEditor.SceneManagement;
using System.Collections.Generic;
using IsoTools;

namespace Assets.Editor
{
    [InitializeOnLoad]
    public static class ClearIsoObjectTransformsAction
    {
        static ClearIsoObjectTransformsAction()
        {
            EditorSceneManager.sceneSaving += OnSceneSaving;
            EditorSceneManager.sceneSaved += OnSceneSaved;
        }

        private static List<IsoObjWithPos> _isoObjectsWithPos;

        static void OnSceneSaving(UnityEngine.SceneManagement.Scene scene, string path)
        {
            var isoObjects = Object.FindObjectsOfType<IsoObject>();
            _isoObjectsWithPos = new List<IsoObjWithPos>();
            foreach (var isoObj in isoObjects)
            {
                var localPos = isoObj.transform.localPosition;
                _isoObjectsWithPos.Add(new IsoObjWithPos { Transform = isoObj.transform, LocalPos = localPos });
                isoObj.transform.localPosition = new Vector3(localPos.x, localPos.y, 0f);
            }
        }

        static void OnSceneSaved(UnityEngine.SceneManagement.Scene scene)
        {
            if (_isoObjectsWithPos == null)
            {
                return;
            }
            foreach (var objWithPos in _isoObjectsWithPos)
            {
                objWithPos.Transform.localPosition = objWithPos.LocalPos;
            }
        }

        private class IsoObjWithPos
        {
            public Transform Transform;
            public Vector3 LocalPos;
        }
    }
}