• 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 /
  • Help Room /
avatar image
Question by rilgon · Mar 14, 2016 at 08:31 AM · c#collisionraycastraycastingdetection

Raycast does not seem to properly detect object it hit

Hello,

I have this function below that projects a number of rays in a angle based on the parameters. My issue is that, as my images below illustrate, when I draw this ray with Debug.DrawRay, it seems that the rays pass through the object. However, when I do a Physics.Raycast using the same position and direction, it does not return true that it has hit the cube as my output from the print of the string is always empty string. Am I missing something in my understanding of how Raycasts work? (Utils.VectorHalfUp is (0,.5,0) by the way)

     public void AngledAttack(float startAngle, float forwardMultiplier, int numPoints, float angleIncrement) {
         Vector3 direction = (Quaternion.AngleAxis(startAngle, Vector3.up) * transform.rotation) * ((Vector3.forward * forwardMultiplier));
         var temp = pos;
         Quaternion stepAngle = Quaternion.AngleAxis(angleIncrement, Vector3.up);
         string collidedObject = "";
         Ray ray = new Ray(pos+Utils.VectorHalfUp, direction);
         print(ray);
         RaycastHit hit;
         for(int i = 0; i < numPoints; i++) {
             Debug.DrawRay(pos+Utils.VectorHalfUp, direction, Color.red);
             
             if(Physics.Raycast(ray, out hit, Mathf.Infinity)) {
                 collidedObject += hit.collider.gameObject.name;// "Hit: " + Utils.FindTaggedParent(hit.collider.gameObject).name + "\n";
             }
             direction = stepAngle * direction;
 
         }
         print(collidedObject);
     }

alt text

alt text

ray1.png (44.7 kB)
ray2.png (35.7 kB)
Comment

People who like this

0 Show 2
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 Salmjak · Mar 14, 2016 at 08:47 AM 0
Share

@rilgon You never update your ray! :P Add ray.direction = direction; in the end of the loop!

avatar image rilgon Salmjak · Mar 16, 2016 at 12:53 AM 0
Share

Thank you. That fixed it.

0 Replies

· Add your reply
  • Sort: 

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

5 People are following this question.

avatar image avatar image avatar image avatar image avatar image

Related Questions

Raycast hit 2 Answers

Collision Detection Help! 1 Answer

Raycast on enemy AI goes through walls 0 Answers

Help with consuming an object on key press 1 Answer

Raycast detect in object (problem) 0 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