Wayback Machinekoobas.hobune.stream
May JUN Jul
Previous capture 13 Next capture
2021 2022 2023
1 capture
13 Jun 22 - 13 Jun 22
sparklines
Close Help
  • 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 ina · Jan 01, 2011 at 04:31 AM · javascriptarraynullreferenceexceptionvector2

Populating a Vector2 array in Javascript

For some reason, I can't seem to populate a vector2 array in Javascript.

function verts2uv(p:Vector3[]){ var arr:Vector2[]; for(var q:int=0;q<p.length;q++){ arr[q]=Vector2(p[q].x,p[q].y); } return arr; }

I keep on getting this error: NullReferenceException: Object reference not set to an instance of an object

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
1
Best Answer

Answer by Jessy · Jan 01, 2011 at 05:12 AM

First, your code looks TERRIBLE. Use the space bar! Start your function names with a capital letter. And there is already an implicit conversion from Vector3 to Vector2.

The problem is that arr has not been initialized. You need to create and array of the appropriate size, before you do anything with it.

function Verts2UV (verts : Vector3[]) {
    var uv = new Vector2[verts.length];
    for (var i = 0; i < uv.Length; i++) uv[i] = verts[i];
    return uv;
}
Comment
Add comment · Show 5 · 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 ina · Jan 01, 2011 at 05:14 AM 0
Share

ahhh you can't create an array of arbitrary size?

avatar image ina · Jan 01, 2011 at 05:14 AM 0
Share

oh also... i'm usually on a tiny screen, so spaces are spacy xD ... i'm reserving cap's for functions more likely to be public, than private intermediaries like these

avatar image Jessy · Jan 01, 2011 at 05:15 AM 0
Share

No. That's what a Generic List is for. Available in JavaScript as of Unity 3.0.

avatar image Jessy · Jan 01, 2011 at 05:16 AM 0
Share

Buy a bigger screen. If your code has to look like that, there are better things to do with your life than coding.

avatar image ina · Jan 01, 2011 at 05:26 AM 0
Share

neat to find that vec3 to vec2 doesn't need to be re-componentized!

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.

Follow this Question

Answers Answers and Comments

No one has followed this question yet.

Related Questions

NullReferenceException with Javascript Array 2 Answers

NullReferenceException weird error 1 Answer

Why is my array null? 0 Answers

Why ExecuteInEditMode Always Causes NullReferenceException Errors Even In Clamping!! 2 Answers

Pushing GameObject into JS Array returns NullReferenceException 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