Question Changes made to objects by scripts in edit mode not saving when entering play mode.

I have a script which changes the color of an object in edit mode, but when I enter play mode the changes
don't save. Does anyone have any ideas on how to fix this?

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEditor;
5. using UnityEditor.SceneManagement;
6. using UnityEngine.SceneManagement;
7. [ExecuteInEditMode]
8. public class colorEditing : MonoBehaviour
9. {
10.    
11.     public Color colorOne;
12.     public Color colorTwo;
13.     public bool isColor1;
14.     Vector3 mousePos;
15.     // Start is called before the first frame update
16.  
17.  
18.     private void OnEnable()
19.     {
20.         SceneView.duringSceneGui += OnScene;
21.     }
22.     void OnScene(SceneView scene)
23.     {
24.         Event e = Event.current;
25.         if(e.type == EventType.MouseDown && e.button == 0)
26.         {
27.             mousePos = e.mousePosition;
28.             float ppp = EditorGUIUtility.pixelsPerPoint;
29.             mousePos.y = scene.camera.pixelHeight - mousePos.y * ppp;
30.             mousePos.x *= ppp;
31.             mousePos = scene.camera.ScreenToWorldPoint(mousePos);
32.             if (Vector2.Distance(mousePos, transform.position) < 0.5f)
33.             {
34.                 changeColor();
35.             }
36.         }
37.         if (e.type == EventType.MouseDown && e.button == 2)
38.         {
39.             print("Middle mouse button was pressed");
40.             saveScene();
41.         }
42.     }
43.     void changeColor()
44.     {
45.         if (isColor1)
46.         {
47.             isColor1 = false;
48.         }
49.         else
50.         {
51.             isColor1 = true;
52.         }
53.     }
54.    
55.     // Update is called once per frame
56.     void Update()
57.     {
58.         if (isColor1)
59.         {
60.             gameObject.GetComponent<SpriteRenderer>().color = colorOne;
61.         }
62.         else
63.         {
64.             gameObject.GetComponent<SpriteRenderer>().color = colorTwo;
65.         }
66.     }
67.     void saveScene()
68.     {
69.         if (EditorSceneManager.SaveCurrentModifiedScenesIfUserWantsTo())
70.         {
71.             Debug.Log("Scene saved");
72.         }
73.         else
74.         {
75.             print("Scene not saved");
76.         }
77.     }
78.    
79. }

 

I don't see you dirtying the object anywhere (

UnityEditor.EditorUtility.SetDirty()

) so Unity doesn't know the value has changed, and won't write the changes out before entering play mode.

Whenever you change any values via code that you want to persist you must dirty the object.

Also you should cache the component reference in OnEnable rather than calling

GetComponent<T>

every frame.

 

Thanks a lot, I also noticed that I had to unpack the object from it's prefab.