• 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
1
Question by Serve_Hermans · Jun 06, 2011 at 06:56 PM · iosiphone

Scaling a group of meshes framerate drops with 75%

I have a scene where I have grouped a small number of meshes by using an empty game object. On the empty game object I am applying a scale using the iTween library, method ScaleAdd. Frame rate drops with 75%. When I do the same using rotate or move the frame rate doesn't change a lot. The meshes all use the same material and have a rigidbody and mesh collider attached. I have checked performance by changing shaders, materials, turning off lights etc.

To show you what I mean I have uploaded a screen cast. Hopefully, someone can explain why this is happening.

Here is the cast:Screen cast

Comment
Add comment · Show 1
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 Antony-Blackett · Jun 06, 2011 at 09:10 PM 0
Share

I've found that scaling objects sometimes forces unity to re submit VBOs (vertex buffer objects) to the GPU. This is slow and should be avoided. I'm unsure why it only sometimes happens though. I've had it happen to me and all I did to fix it was delete and reconstruct the object to be identical as it was before and the problem disappeared... not the best solution.

1 Reply

· Add your reply
  • Sort: 
avatar image
1
Best Answer

Answer by Paulius-Liekis · Jun 07, 2011 at 08:35 AM

You should try Profiler view in Unity - it would pin point the problem immediately.

Problem in your case is that you have a collider and you want to scale your object. Physics can't have scaled colliders, so when you scale it physics has to apply scale on the collider. That's what's taking most of the time. You have to either not use collider on your scaled object or not use scale.

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 Serve_Hermans · Jun 07, 2011 at 06:33 PM 0
Share

That's it! I removed the mesh colliders and guess what, the performance did not drop AT ALL! Ins$$anonymous$$d it even got a little better even when I rotated and scaled the group of meshes at the same time. So the conclusion is indeed that scaling meshes with collider components attached are absolutely $$anonymous$$ILLING the performance!

Thanks for the quick answer!

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

3 People are following this question.

avatar image avatar image avatar image

Related Questions

What exactly can you can and can't you do when developing for iOS on Windows 1 Answer

How to Use Activity Indicator in Unity3d 1 Answer

Input.location.start always times out 1 Answer

Unity 5.0.1f1: iOS client to Linux server RPC silent failure 1 Answer

LocalNotifications deprecated in Unity 5 2 Answers


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