• 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 dbblts · May 02, 2015 at 11:34 PM · c#velocityspeedballincrease

Ball doesn't increase speed. C#

I am creating a pong game just to test out Unity3D. So, every time the ball hits a racket, it's supposed to increase the speed. But when I do that the ball hits the racket several times, then it starts flying everywhere..

Can anyone help?

Here is the code:

 using UnityEngine;
 using System.Collections;
 
 public class BallBehaviour : MonoBehaviour {
 
     public float speed = 30f;
     
     bool reset = false;
 
     void Start(){
         GetComponent<Rigidbody2D> ().velocity = Vector2.right * speed;
     }
 
     void Update(){
         if (reset && Input.GetKeyUp (KeyCode.Space)) {
             GetComponent<Rigidbody2D> ().velocity = Vector2.right * speed;
             reset = false;
         } else {
             GetComponent<Rigidbody2D> ().velocity = Vector2.right * speed;
         }
     }
 
     void OnCollisionEnter2D (Collision2D col){
         if (col.gameObject.name == "Player 1" || col.gameObject.name == "Player 2") {
             speed += 5f;
         } else if (col.gameObject.name == "WallLeft") {
             Reset();
         } else if (col.gameObject.name == "WallRight") {
             Reset();
         }
     }
 
     void Reset () {
         reset = true;
         gameObject.transform.position = new Vector2 (0, 0);
         GetComponent<Rigidbody2D> ().velocity = Vector2.zero;
 
     }
 }


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 machosalad · May 03, 2015 at 08:11 AM 0
Share

$$anonymous$$aybe you can solve this by creating a variable that remembers what player the ball last collided with, so that the ball doesn't increase speed if it collides with the same player twice in a row.

1 Reply

· Add your reply
  • Sort: 
avatar image
0

Answer by zeppike · May 03, 2015 at 08:27 AM

For me the problem seems to be, that you always trying to set the velocity to the right. So after collision the standard physics system bounces back the ball, but you set the velocity to the right again in Update(). To achieve the desired effect in OnCollisionEnter2D() I would store the velocity in a temporary variable, modify the x value and write it back. Than eliminate the else closure from Update. Something like this:

 void OnCollisionEnter2D (Collision2D col){
      if (col.gameObject.name == "Player 1" || col.gameObject.name == "Player 2") {
          speed += 5f;
          Vector2 tmp =  GetComponent<Rigidbody2D> ().velocity;
          tmp.x += speed;
          GetComponent<Rigidbody2D> ().velocity = tmp;
      }
 }
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.

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

Change bouncing angle with touching speed 1 Answer

Can you still not change the Velocity of spawned particles? 2 Answers

Multiple Cars not working 1 Answer

Distribute terrain in zones 3 Answers

How to increase and decrease the animation speed? 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