• Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
  • Asset Store
  • Get Unity

UNITY ACCOUNT

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account
  • Blog
  • Forums
  • Answers
  • Evangelists
  • User Groups
  • Beta Program
  • Advisory Panel

Navigation

  • Home
  • Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
    • Blog
    • Forums
    • Answers
    • Evangelists
    • User Groups
    • Beta Program
    • Advisory Panel

Unity account

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account

Language

  • Chinese
  • Spanish
  • Japanese
  • Korean
  • Portuguese
  • Ask a question
  • Spaces
    • Default
    • Help Room
    • META
    • Moderators
    • Topics
    • Questions
    • Users
    • Badges
  • Home /
avatar image
0
Question by Cyberpie_n_milk · Mar 15, 2013 at 05:40 PM · javascriptarrayerror messageaccess

Can't edit built-in array through script unless viewed in Inspector

 class Data{
         public var x : float;
         public var y : float;
         public var z : float;
         public var name : String;
     }
     
     class DataClass{
        var allObjects:Data[] = new Data[0];
        function DataClass() { }
     }
     
     var objectData:DataClass;
     
     function Start(){
     
         var foundObjects = GameObject.FindObjectsOfType(Transform);
         objectData.allObjects = new Data[foundObjects.Length]; 
         yield WaitForSeconds(1);
         for(var num:int;num<foundObjects.Length;num++){
             objectData.allObjects[num].x = foundObjects[num].position.x; //Error here
             objectData.allObjects[num].y = foundObjects[num].position.y; 
             objectData.allObjects[num].z = foundObjects[num].position.z;
             objectData.allObjects[num].name = foundObjects[num].name; 
         }
     }    

When I run this and the objectData array isn't displayed in the Inspector, I get "NullReferenceException: Object reference not set to an instance of an object". This also happens if I remove the yield or make the array static or private.

If I select the gameobject with the script, so I can see the array in the Inspector, it works.

Comment
Add comment
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users

1 Reply

· Add your reply
  • Sort: 
avatar image
0
Best Answer

Answer by robertbu · Mar 15, 2013 at 06:32 PM

On line 18, you create an array of Data objects, but you don't initialize the entry of the array with Data objects. Insert something like this between lines 18 and 19.

 for (var i = 0; i < objectData.allObjects.Length; i++)
       objectData.allObjects[i] = new Data();
Comment
Add comment · Show 1 · Share
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users
avatar image Cyberpie_n_milk · Mar 15, 2013 at 06:42 PM 0
Share

It worked. Thank you!

Your answer

Hint: You can notify a user about this post by typing @username

Up to 2 attachments (including images) can be used with a maximum of 524.3 kB each and 1.0 MB total.

Welcome to Unity Answers

If you’re new to Unity Answers, please check our User Guide to help you navigate through our website and refer to our FAQ for more information.

Before posting, make sure to check out our Knowledge Base for commonly asked Unity questions.

Check our Moderator Guidelines if you’re a new moderator and want to work together in an effort to improve Unity Answers and support our users.

Follow this Question

Answers Answers and Comments

10 People are following this question.

avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image

Related Questions

Setting Scroll View Width GUILayout 1 Answer

Can someone help me fix my Javascript for Flickering Light? 6 Answers

Issue with some GUITextures and an Array [SOLVED] 1 Answer

How to find the opposite variables list? 1 Answer

I need help with Javascript 1 Answer


Enterprise
Social Q&A

Social
Subscribe on YouTube social-youtube Follow on LinkedIn social-linkedin Follow on Twitter social-twitter Follow on Facebook social-facebook Follow on Instagram social-instagram

Footer

  • Purchase
    • Products
    • Subscription
    • Asset Store
    • Unity Gear
    • Resellers
  • Education
    • Students
    • Educators
    • Certification
    • Learn
    • Center of Excellence
  • Download
    • Unity
    • Beta Program
  • Unity Labs
    • Labs
    • Publications
  • Resources
    • Learn platform
    • Community
    • Documentation
    • Unity QA
    • FAQ
    • Services Status
    • Connect
  • About Unity
    • About Us
    • Blog
    • Events
    • Careers
    • Contact
    • Press
    • Partners
    • Affiliates
    • Security
Copyright © 2020 Unity Technologies
  • Legal
  • Privacy Policy
  • Cookies
  • Do Not Sell My Personal Information
  • Cookies Settings
"Unity", Unity logos, and other Unity trademarks are trademarks or registered trademarks of Unity Technologies or its affiliates in the U.S. and elsewhere (more info here). Other names or brands are trademarks of their respective owners.
  • Anonymous
  • Sign in
  • Create
  • Ask a question
  • Spaces
  • Default
  • Help Room
  • META
  • Moderators
  • Explore
  • Topics
  • Questions
  • Users
  • Badges