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Question by zakwoolley1_unity · Sep 17, 2017 at 11:51 PM · c#scripting problemscript.listsorting

Sorting a list based of a variable

Hi.

I'm trying to sort a list full of gameObjects based on a int from the scripts attached to the gameObjects. As sorting lists is new territory for me, I've looked at various tutorials and forums on how to do this but no matter what I do, I somehow still end up with errors. I was hoping someone could take a look at my code and let me know what I'm doing wrong.

  using System.Collections;
  using System.Collections.Generic;
  using UnityEngine;
  
  public class KartPosition : MonoBehaviour
  {
  
      public List<GameObject> players = new List<GameObject>();
      public GameObject p1;
      int i;
  
      // Update is called once per frame
      void FixedUpdate()
      {
  
          players.Sort((IComparer<GameObject>)new Compare());
  
  
          //getting player index
          foreach (GameObject element in players)
          {
              i++;
              if (element == p1)
              {
                  Debug.Log(i);
                  i = 0;
              }
          }
      }
  
  }
      private class Compare : IComparer<GameObject>
      {
          int IComparer<GameObject>.Compare(GameObject _objA, GameObject _objB)
          {//getting sctrips from gameObjects
              if (_objA.name == "Player1")
              {
                  KartControl aScript = _objA.GetComponent<KartControl>();
                  KartAI bScript = _objb.GetComponent<KartAI>();
              }
              else if (_objB.name == "Player1")
              {
                  KartAI aScript = _objA.GetComponent<KartAI>();
                  KartControl bScript = _objb.GetComponent<KartControl>();
              }
              else
              {
                  KartAI aScript = _objA.GetComponent<KartAI>();
                  KartAI bScript = _objb.GetComponent<KartAI>();
              }
  
  
              //checking checkpoint variables
              if (aScript.cpNumb == bScript.cpNumb)
              {
                  float aDist = Vector3.Distance(aScript.cp[0].transform.position, _objA.transform.position);
                  float bDist = Vector3.Distance(bScript.cp[0].transform.position, _objB.transform.position);
  
                  if (aDist < bDist)
                  {
                      t1 = 2;
                      t2 = 1;
                  }
                  else
                  {
                      t1 = 1;
                      t2 = 2;
                  }
              }
              else
              {
                  t1 = aScript.cpNumb;
                  t2 = bScript.cpNumb;
              }
              return t1.CompareTo(t2);
          }
      }

 

Thanks

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Best Answer

Answer by Kishotta · Sep 18, 2017 at 05:41 AM

If you import System.Linq you can do:

 MyGameObjectList = MyGameObjectList.OrderBy (e => e.GetComponent<MyComponent> ().MyComponentMember).ToList ();
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avatar image zakwoolley1_unity · Sep 19, 2017 at 05:26 PM 0
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Thank you.

avatar image sssetz · Jan 24, 2020 at 04:51 PM 0
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dear god thank you. :)

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