Wayback Machinekoobas.hobune.stream
May JUN Jul
Previous capture 12 Next capture
2021 2022 2023
1 capture
12 Jun 22 - 12 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 /
  • Help Room /
avatar image
0
Question by MrPotetmoss · Dec 01, 2015 at 12:24 AM · raycastingdistanceraycasthit

raycast hit distance issue

The Distance variable just turn into random numbers when i click the mouse button. What did i do wrong? Please help :)

var TheDamage : int = 50; var Distance : float; var MaxDistance : float = 1.5;

function Update() {

 if (Input.GetMouseButtonDown(0)) {
     var hit : RaycastHit;
     Distance = hit.distance;
     Debug.Log("Pressed left click.");
     if (Physics.Raycast (transform.position, transform.TransformDirection(Vector3.forward), hit)) {
         Distance = hit.distance;
         if (Distance < MaxDistance)
         {
             hit.transform.SendMessage("ApplyDamage", TheDamage, SendMessageOptions.DontRequireReceiver);
         }
         
     }
 }

}

Comment
Add comment · 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 meat5000 ♦ · Nov 30, 2015 at 03:08 PM 0
Share

Dont you want transform.forward ins$$anonymous$$d of Vector3.forward? Local forward vector to world space, right?

avatar image MrPotetmoss · Dec 01, 2015 at 12:14 AM 0
Share

It still does not work. I think the main issues is :

The hit.distance updates at random times when i click the mouse button, like every 10th time. Why? And what can i do to fix it?

When the hit.distance updates it is a completly wrong number, i dont know why, but there must be something wrong in the script. Please help! :)

Here is the script:

 #pragma strict
 
 var TheDamage : int = 50;
 var Distance : float;
 
 function Update () 
 {
     if(Input.Get$$anonymous$$ouseButtonDown(0)) 
     {
         var hit : RaycastHit;
         
         if (Physics.Raycast (transform.position, transform.TransformDirection(transform.forward), hit)) 
         {
             Distance = hit.distance;
         }
     }
 }

1 Reply

· Add your reply
  • Sort: 
avatar image
0

Answer by rutter · Dec 01, 2015 at 12:26 AM

This line appears twice:

 Distance = hit.distance;

A RaycastHit is only safe to access after it has been used in a raycast call, and even then only if that call returned true (indicating that a hit occurred).

The first Distance = hit.distance; occurs before you've actually fired a raycast, which means that you may be reading garbage data.

You should only read from hit if the raycast returns true.

Comment
Add comment · 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

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

4 People are following this question.

avatar image avatar image avatar image avatar image

Related Questions

How to use RaycastHit ? 0 Answers

Adding MaxDistance to RayCast Stops Raycast From working 0 Answers

Casting a ray from empty game object but did'nt know how to get the name of game object infront of the ray ? 1 Answer

script attached to main camera wont shoot debug line straight. also wont detect collision on raycast 1 Answer

Help with Raycast Script 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