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Help with assigning array data on scriptable object

Discussion in 'Scripting' started by gdg, Jul 24, 2015.

  1. gdg

    gdg

    Joined:
    Jul 8, 2013
    Posts:
    9
    For my current project I have to read data from CSV files and I'd like to store the data in scriptable objects.
    When I try to assign ordinary fields I don't get any problems but if I try to assign an array I get a NullReferenceException.

    The following code works:

    Code (CSharp):
    1. using UnityEngine;
    2. using System.Collections;
    3. using System.Collections.Generic;
    4. using System.Linq;
    5. [System.Serializable]
    6. public class EachLevel
    7. {
    8.      public uint mLevelID;
    9.      public uint mSceneID;
    10. };
    11. [System.Serializable]
    12. public class LevelData : ScriptableObject
    13. {
    14.      public EachLevel lvl;
    15.      public void Init ( uint id1, uint id2 )
    16.      {
    17.          lvl.mLevelID = id1;
    18.          lvl.mSceneID = id2;
    19.      }
    20. }
    But this one does not:

    Code (CSharp):
    1. using UnityEngine;
    2. using System.Collections;
    3. using System.Collections.Generic;
    4. using System.Linq;
    5. [System.Serializable]
    6. public class EachLevel
    7. {
    8.      public uint mLevelID;
    9.      public uint mSceneID;
    10. };
    11. [System.Serializable]
    12. public class LevelData : ScriptableObject
    13. {
    14.      public EachLevel[] lvl;
    15.      public void Init ( uint id1, uint id2 )
    16.      {
    17.          lvl = new EachLevel[2];
    18.          lvl[0].mLevelID = id1;
    19.          lvl[0].mSceneID = id2;
    20.          lvl[1].mLevelID = id2;
    21.          lvl[1].mSceneID = id1;
    22.      }
    23. }
    Any idea why?
     
  2. Lysander

    Lysander

    Joined:
    Feb 24, 2013
    Posts:
    1,588
    You've created a new array but you haven't created any EachLevel objects.
    Code (csharp):
    1. lvl = new EachLevel[2];
    2. lvl[0] = new EachLevel();
    3. lvl[0].mLevelID = id1;
    4. lvl[0].mSceneID = id2;
    5. lvl[1] = new EachLevel();
    6. lvl[1].mLevelID = id2;
    7. lvl[1].mSceneID = id1;
     
    gdg likes this.
  3. gdg

    gdg

    Joined:
    Jul 8, 2013
    Posts:
    9
    Oh, I din't know I had to do that despite using arrays and classes for so long. I tried it and it works perfectly. Thank you! I had also posted this question yesterday in Unity answers but it seems that the forums are more active than unity answers.