custom struct not showing up in inspector?

Question

I'm trying to cluster data into better handleable chunks. I'm experimenting with classes and Javascript structs (as described here). My custom structs are not showing up in the inspector even though similarly coded classes do! I can access/edit them from a script just fine but tracking them in the inspector or even setting their values is not possible. What's wrong wit my implementation?

 #pragma strict
 
 var dummy1 : Vector3; // shows up
 var dummy2 : TestStruct; // does not show up
 var dummy3 : TestClass; // shows up
 var dummy4 : Vector3; // shows up
 
 function Start () {
     dummy2.t=2;
     dummy3.t=3;
     print(dummy2);
     print(dummy2.t);
     print(dummy3);
     print(dummy3.t);
 }
 
 class TestStruct extends System.ValueType{
     var x : float;
     var y : float;
     var z : float;
     var t : float;
 }
 class TestClass {
     var x : float;
     var y : float;
     var z : float;
     var t : float;
 }

Answer 1

Best Answer

Answer by Setzer22 · Dec 28, 2012 at 11:14 PM

Update
Unity now supports the serialization of structs, so the old answer does no longer apply to the current versions of Unity. No need to downvote ancient answers that were perfectly valid when they were posted 10 years ago.

I'm afraid this can't be done on Unity. Classes will do fine but structs can't be serialized with Unity and thus, won't display on the inspector. I don't know the reasons for this limitation (I think it's fair to call it a limitation) but I bet this is because of structs being value types, not refference ones, but as floats and integers can be assigned, there might be something else there...

Anyway, you might want to check this out: http://forum.unity3d.com/threads/36395-How-do-I-make-member-structs-accessible-in-the-editor?highlight=struct+inspector

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Golan2781 · Dec 29, 2012 at 08:25 AM 0

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Thanks, that'll save me a lot of time trying. :D

It seems like a pretty hefty limitation indeed, especially seeing how Unity's own structs work fine and fast. Is there a feature request for this? I wasn't able to find one.

Answer 2

Answer by jannis99 · Dec 11, 2015 at 03:23 PM

Serializing structs in Unity is actually possible now. I found this on the forums (Link):

     [System.Serializable]
     public struct PlayerStats
     {
         public int moveSpeed;
     }

I have tried it and it works fine.

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Zeratul3D · Jul 26, 2018 at 04:02 PM 1

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Works perfectly also on Unity 2018.

Zack-Londres · Aug 04, 2020 at 06:41 PM 1

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This is the way

RendergonPolygons · Jul 25, 2022 at 02:58 PM 0

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doesn't work for me U. 2020.3.37

full code

 public class WorldController : MonoBehaviour {
 
  public GameObject block;
  [System.Serializable]
  public struct WorldSize
  {
      public int x, y, z;//tried with [SerializeField] for these int but didn't do anything
      public WorldSize(int x, int y, int z)//removing the constructor didn't help show variables in inspector either
      {
          this.x = x;
          this.y = y;
          this.z = z;
      }
  }
  void Start()
  {
      StartCoroutine(BuildWorld());
  }
  IEnumerator BuildWorld()
  {
      WorldSize thisWorldSize = new WorldSize(10, 2, 10);
      for(int z=0;z< thisWorldSize.z; z++)
      {
          for (int y = 0; y < thisWorldSize.y; y++)
          {
              for (int x = 0; x < thisWorldSize.x; x++)
              {
                  Vector3 pos = new Vector3(x, y, z);
                  float r = Random.Range(0.0f, 1.0f);
                  if (r > 0.5 && (y>=(thisWorldSize.y-2)))
                      continue;
                  GameObject cube = GameObject.Instantiate(block, pos, Quaternion.identity);
                  cube.name = x + "_" + y + "_" + z;
              }
              yield return null;
          }
      }
  }
  // Update is called once per frame
  void Update()
  {
      
  }
 }

Bunny83 RendergonPolygons · Jul 25, 2022 at 03:26 PM 0

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Why do you again post on this ancient question? At the time this question as asked structs were not supported at all when it comes to serialization. That's why the selected answer was actually correct back then.

You should ask your own seperate question when you have a question. We can't really address different questions inside comments of other answers.

Anyways, your monobehaviour class does not have any field of your struct type. You only defined the struct type as a nested type but you don't have a serialized variable inside the monobehaviour. You only use it inside your coroutine in a local variable. You still haven't really said WHAT does not work. Again, stop posting here. Create your own question and add more details about your issue.

custom struct not showing up in inspector?

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