• 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 canine1 · Jul 05, 2011 at 06:21 AM · physicsrigidbody

Pushing a rigidbody with a suspended object

I'm having a problem pushing the red object off the stand with the sliding wall object. When I add Rigidbody to both and use addforce to the sliding wall, it doesn't push the red block when it collides, it makes the wall fly off and the block barely moves.

I want to be able to push items off the stand, then slide back into it's original position, but how can i push the block off the stand using the wall without worry about the wall flying off?

alt text

Comment
Add comment · Show 3
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 Waz · Jul 05, 2011 at 06:40 AM 0
Share

Write some masses and force amounts on that diagram and it may be clearer (including to yourself) what the problem is.

avatar image canine1 · Jul 05, 2011 at 06:50 AM 0
Share

The values are all default.

avatar image Waz · Jul 05, 2011 at 07:53 AM 0
Share

There is no "default" for AddForce. Best to show your code. How often are you adding energy to the sliding wall? How much?

1 Reply

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

Answer by canine1 · Jul 05, 2011 at 08:35 AM

I got it. I added a separate box to the wall that is Kinematic and uses no gravity, then i change the parent object's transform.position to move left or right. This then allows me to move the rigidbody box. The only thing is, if the object is moving to fast, the collision is ignored.

Comment
Add comment · Show 2 · 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 save · Jul 05, 2011 at 09:07 AM 0
Share

Good you solved it.

The physics engine cannot keep up with collisions at higher speeds. If this turns out to be a problem, check with a trigger collider inside the full extent area of the sliding wall at the very moment you add energy to it. Then add force to the colliding rigidbodies inside the trigger area.

avatar image Waz · Jul 05, 2011 at 09:31 AM 1
Share

Also consider setting the fast-moving Rigidbody's Collision Detection mode to Dynamic Continuous (though make sure that RB sleeps most of the time, because dynamic continuous is expensive).

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

4 People are following this question.

avatar image avatar image avatar image avatar image

Related Questions

Avoid bouncing when ground move down 1 Answer

How do you attach moving parts (moved by physics) to an animated character? (Secondary Animations) 1 Answer

Earth quake with physics? 1 Answer

Rigidbody necessary to use collision detection 1 Answer

Rotating my character only while moving in a 2D plane 3 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