Question Need help with really simple editor script

I don't know a thing about making editor scripts and really should learn, but I really need a very basic script and have no idea what to do.

All I need is a script that will turn off object when the scene editor camera moves away a certain distance.

I'm dying here swapping around map chunks and just want to have a script automatically do it.

What would it look like?

Where would I start?

 

Unity Learn has some good guides on editor tools

 

Yeah, and I'm looking through it right now. Still not sure what to do.

 

Make sure the update works in edit mode:
https://docs.unity3d.com/ScriptReference/ExecuteInEditMode.html

Have a reference to the chunks
Disable/enable them in a for loop based on distance

 

Do your map chunks have colliders? If so, you could do OverlapSphere

Code (csharp):

1. using System.Collections.Generic;
2. using UnityEngine;
3.  
4. [ExecuteInEditMode]
5. public class AutoCuller : MonoBehaviour {
6.  
7.   [SerializeField] Transform _chunksParent;
8.   [SerializeField] [Min(0f)] float _range;
9.   [SerializeField] LayerMask _layerMask;
10.  
11. #if UNITY_EDITOR
12.   private const float THRESHOLD = 1E-2f;
13.   private const int MAX_COLLIDERS = 16;
14.  
15.   Vector3 _lastPos;
16.   Colliders _colliders;
17.   HashSet<GameObject> _hset;
18.  
19.   void Start() => process(forced: true);
20.   void OnValidate() => process(forced: true);
21.   void Update() => process();
22.  
23.   void process(bool forced = false) {
24.     if(!forced && !hasMoved()) return;
25.  
26.     _colliders??= new Colliders[MAX_COLLIDERS];
27.  
28.     var count = Physics.OverlapSphereNonAlloc(
29.       position: transform.position,
30.       radius: _range,
31.       results: _colliders,
32.       layerMask: _layerMask,
33.       queryTriggerInteraction: QueryTriggerInteraction.Ignore
34.     );
35.  
36.     updateChildrenIn(_chunksParent, _colliders, count);
37.   }
38.  
39.   bool hasMoved() {
40.     var delta = transform.position - _lastPos;
41.     _lastPos = transform.position;
42.     return changed(delta.x) || changed(delta.y) || changed(delta.z);
43.     static bool changed(float n) => Mathf.Abs(n) >= THRESHOLD;
44.   }
45.  
46.   void updateChildrenIn(Transform parent, Collider[] colliders, int count) {
47.     if(count == 0) return;
48.  
49.     if(_hset is null) _hset = new HashSet<GameObject>();
50.       else _hset.Clear();
51.  
52.     for(int i = 0; i < count; i++)
53.       _hset.Add(colliders[i].gameObject);
54.  
55.     foreach(var xf in parent) {
56.       var go = xf.gameObject;
57.       go.SetActive(_hset.Contains(go));
58.     }
59.   }
60.  
61.   void OnDrawGizmosSelected() {
62.     Gizmos.color = Color.yellow;
63.     Gizmos.DrawWireSphere(transform.position, _range);
64.   }
65. #endif
66.  
67. }

Something like that.