• 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 phxvyper · Dec 30, 2012 at 05:17 AM · directionrpgtrajectory

Using lookat for a specific direction (not an object)

Say im given the direction of an objects forward (transform.forward) and then an initial position of that transform.

I initiate an object/class "RPG" (as i'm working on the trajectory of an RPG Launcher here), and it takes the parameters of that initial position, the objects forward, and the speed of the grenade (which i do not need to worry about).

How do i make the grenade look in the direction of the initial positions forward using the first two parameters.

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
2
Best Answer

Answer by Seth-Bergman · Dec 30, 2012 at 05:28 AM

if you would post your code this would be easier to explain.. But it sounds like all you want is to set the initial rotation of a projectile, to match the launcher, yes? so you should just be able to say:

 projectile.transform.rotation = launcher.transform.rotation;

There is no need for lookat in this case

But just for example sake:

 projectile.transform.LookAt(launcher.transform.position * launcher.transform.forward * 100);

something like this would do it

Comment
Add comment · Show 3 · 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 Owen-Reynolds · Dec 30, 2012 at 07:46 AM 1
Share

Or something fancier, such as rocket.LookAt(rocket.pos+rocket.rigidbody.velocity) after you set the speed.

To look literally in a direction, cutting out the "pos+," can use rocket.rotation=Quat.LookRotation(player.forward+V3.up*0.5).

avatar image phxvyper · Dec 30, 2012 at 08:36 PM 0
Share

Hold on. you're multiplying two Vector3 variables? It gives me an error when i do this.

avatar image Owen-Reynolds · Dec 31, 2012 at 12:35 AM 0
Share

That should be a PLUS after launcher.transform.position, in the Answer.

But a V3 times a V3 (doing pairwise multiply to give a V3 result) is sometimes useful, and is legal some places, just not in Unity.

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

2d top-down rpg direction check 1 Answer

Character facing wrong direction when moving vertically 0 Answers

How to make an animation play always when walking in any direction? 2 Answers

Pointing Object in the Direction it is going 1 Answer

direction/inertia touch system (2d) 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