UI Handles disappear when using OnSceneGui

Hey,

I followed this youtube tutorial on Bézier curves. But when I add the OnSceneGui method, for some reason the FreeMoveHandles won't show up, and also all the handles, for moving objects in the scene disappear as well. I have gizmos enabled, all the methods are being called correctly, my camera is behind the object so I don't know what might be the problem.

These are the scripts for the tutorial. I checked and they are the same as mine until a point, where I had to stop because I couldn't follow along anymore, thanks to the problem.

Regardless, this is my code:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. [System.Serializable]
6. public class Path
7. {
8.     [SerializeField, HideInInspector]
9.     List<Vector2> points;
10.    
11.     public Path(Vector2 centre)
12.     {
13.         points = new List<Vector2>
14.         {
15.             centre + Vector2.left,
16.             centre + (Vector2.left + Vector2.up) * 0.5f,
17.             centre + (Vector2.right + Vector2.down) * 0.5f,
18.             centre + Vector2.right
19.  
20.         };
21.  
22.     }
23.  
24.     public void AddSegment(Vector2 anchorPos)
25.     {
26.         points.Add(points[points.Count - 1] * 2 - points[points.Count - 2]);
27.         points.Add((points[points.Count - 1] + anchorPos) / 2);
28.         points.Add(anchorPos);
29.     }
30.  
31.     public Vector2[] GetPointsInSegment(int i)
32.     {
33.         return new Vector2[]
34.         {
35.             points[i * 3],
36.             points[i * 3 + 1],
37.             points[i * 3 + 2],
38.             points[i * 3 + 3],
39.         };
40.     }
41.  
42.     public Vector2 this[int i]
43.     {
44.         get
45.         {
46.             return points[i];
47.         }
48.     }
49.  
50.     public int NumSegments
51.     {
52.         get
53.         {
54.             return (points.Count - 1) / 3;
55.         }
56.     }
57.  
58.     public int NumPoints
59.     {
60.         get
61.         {
62.             return points.Count;
63.         }
64.     }
65.  
66.     public void MovePoint(int i, Vector2 pos)
67.     {
68.         points[i] = pos;
69.     }
70. }
71.  

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class PathCreator : MonoBehaviour
6. {
7.     [HideInInspector]
8.     public Path path;
9.  
10.     public void CreatePath()
11.     {
12.         path = new Path(transform.position);
13.     }
14. }
15.  

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEditor;
5.  
6. [CustomEditor(typeof(PathCreator))]
7. public class PathEditor : Editor
8. {
9.     PathCreator creator;
10.     Path path;
11.  
12.  
13.     private void OnSceneGUI()
14.     {
15.         Draw();
16.     }
17.     void Draw()
18.     {
19.  
20.         Handles.color = Color.red;
21.         for (int i = 0; i < path.NumPoints; i++)
22.         {
23.  
24.             Vector2 v2 = creator.transform.position;
25.             Vector2 newPos = Handles.FreeMoveHandle(path[i] + v2, Quaternion.identity, 0.5f, Vector2.zero, Handles.SphereHandleCap);
26.             if (path[i] != newPos)
27.             {
28.                 Undo.RecordObject(creator, "Move point");
29.                 path.MovePoint(i, newPos);
30.             }
31.         }
32.     }
33.  
34.     private void OnEnable()
35.     {
36.  
37.         creator = (PathCreator)target;
38.         if (creator.path == null)
39.         {
40.             creator.CreatePath();
41.         }
42.         path = creator.path;
43.     }
44. }
45.  

 

It seems that you should wrap the code with Handles.BeginGUI() and Handles.EndGUI().

Code (CSharp):

1. public void OnSceneGUI()
2. {
3.     Handles.BeginGUI();
4.     // YOUR CUSTOM GUI CODE
5.     Handles.EndGUI();
6. }