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Question by Chickenator · Dec 15, 2014 at 05:48 PM · javascriptrigidbodyrigidbody2daddtorque

AddTorque Isn't Working?

My problem is that for some reason it stops rotating after a while when it's going forwards instead of carrying on rotating. Also even when im going backwards I never get "Backwards" in be console.

Heres my script

 #pragma strict
 
 var speed : float = 1;
 var backward : float = 1;
 var rotationRight : float = 1;
 var rotationLeft : float = 1;
 var startingSpeed : float = 5;
 var spin : float = 10;
 var maxSpeed : float = 50;
 var speedDifference : float = 5;
 var currentSpeed : float = 0;
 var brake : float = 10;
 
 function Start () {
 
 
     rigidbody2D.AddForce (Vector2(0, -startingSpeed * 0.5));
         
 
 
 }
 
 function Update () {
 currentSpeed = rigidbody2D.velocity.magnitude;
 
 speedDifference = maxSpeed - currentSpeed;
 
     
 
 
     if (currentSpeed > maxSpeed) {
     
         rigidbody2D.AddForce (Vector2(speedDifference, 0));
         
         }
         
         if (currentSpeed < maxSpeed) {
         
             rigidbody2D.AddForce (Vector2(speed, 0));
         
         }
 
         if (Input.GetMouseButton(0)) {
         
             rigidbody2D.AddForce (Vector2(brake, 0));
             
             }
             
             if (currentSpeed < 0) {
             
             Debug.Log ("Backwards");
                 rigidbody2D.AddTorque (-spin, 0);
             
             }
             if (currentSpeed > 0) {
             
             Debug.Log ("Forwards");
                 rigidbody2D.AddTorque (spin, 0);
             
             }
         }
 

Thanks in advance

Also sorry if this is a newby mistake or there were other questions answering this. I looked and couldn't find any

NOTE: I would like answers to be in JS (javaScipt, unityscript whatever you want to call it) because this game is being made purely for learn JS so doing it in C# or boo isn't going to help

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Answer by MrSoad · Dec 15, 2014 at 04:52 PM

What is the Angular Drag setting on your rigidbody? The higher this is the more the spin will slow down(even in mid air).

Also you set the currentSpeed var to the magnitude of the velocity, AFAIK the magnitude is always a positive value. So currentSpeed will never be less than 0, so you will never get the "Backwards" effect.

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avatar image Chickenator · Dec 15, 2014 at 05:02 PM 0
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@$$anonymous$$rSoad $$anonymous$$y angular drag is 0.05 i turned it to 0 and still stopped spinning. If it helps I have a physics material attached to the object and have also turned off gravity. And would you have any idea how I would achieve the "Backwards" effect?

avatar image MrSoad · Dec 15, 2014 at 05:17 PM 0
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Take a look at this post for how to get the correct currentSpeed, as for why it still stops spinning I'm not sure.

http://answers.unity3d.com/questions/364910/direction-of-rigidbodyvelocitymagnitude.html

avatar image MrSoad · Dec 18, 2014 at 12:33 PM 0
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Take a look at my answer to this, I had forgot to mention about changing your Angular Drag Setting :

http://answers.unity3d.com/questions/857196/how-to-add-spin-to-a-ball-in-pong-game.html

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