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Question by azmundai · Jul 06, 2013 at 07:04 AM · editorgameobjectsselection

Editor Script to replace objects (problem with selection)

This is what I have sofar, and it works, but on a game object with 23 children, only 11 of them get changed.

 using UnityEngine;
 using System.Collections;
 using UnityEditor;
 using System.Collections.Generic;
 
 public class CreateHolders : MonoBehaviour {
     
     [MenuItem ("Pluto/Place Holders")]
     static void PlaceHolders () {
         foreach(GameObject go in Selection.gameObjects){
             foreach (Transform child in go.transform) {
                 if(child.tag == "Wall"){
                     GameObject tempGo = new GameObject(child.name.Replace("TS001_", "WALL"));
                     tempGo.tag = "WallHolder";
                     tempGo.transform.parent = Selection.activeTransform;
                     DestroyImmediate(child.gameObject);
                 }
             }
         }
 
     }
 }

EDIT1: It appears to only do half of the children First one does 11/23, leaving 12. Second one does 6/12 leaving 6. Third time does 3/6 leaving 3. etc .. strange?

EDIT2: I tried unparenting the items I wanted to destroy and not destroying them, and it still only processed 1/2 of the children. Problem doesn't appear to be with DestroyImmediate().

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avatar image supercouge · Jul 06, 2013 at 07:48 AM 0
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It is recommended to use Destroy ins$$anonymous$$d of DestroyImmediate. It should also solve your problem.

Edit : Sorry, I forgot that you were in edit mode :/

avatar image azmundai · Jul 06, 2013 at 08:03 AM 0
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yea i tried that. doesn't seem to work:

Destroy may not be called from edit mode! Use DestroyImmediate ins$$anonymous$$d. Also think twice if you really want to destroy something in edit mode. Since this will destroy objects permanently. UnityEngine.Object:Destroy(Object) CreateHolders:PlaceHolders() (at Assets/Editor/CreateHolders.cs:19)

Also, see EDIT2

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Answer by supercouge · Jul 06, 2013 at 08:20 AM

I tried that and it seems to work.

         foreach(GameObject go in Selection.gameObjects){
             for(int i = 0; i < go.transform.GetChildCount(); i++) {
                 DestroyImmediate(go.transform.GetChild(i).gameObject);
                 i--;
             }
         }
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avatar image azmundai · Jul 06, 2013 at 08:28 AM 0
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awesome! thanks!!

avatar image Jamora · Jul 06, 2013 at 08:36 AM 0
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I'm such a slow typist... Well, as to why this works, it is because you were destroying what you were iterating through, so you skipped every other index. This usually gives a runtime error when done with foreach... Ins$$anonymous$$d of decreasing one from i you could also for (int i = 0; i< go.transform.childCount; ) or while(go.transform.childCount>0)

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