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Question by evildumdum · Aug 20, 2014 at 12:33 PM · javascriptscripting problemmovement

simple ball rolling mechanic

okay so i need help on how to get the ball to roll when i press AD, so i fiddled around with the script for a while and the closest i got was getting no errors and finding the ball only rolled to the right unprompted.

here is the script: #pragma strict

 var RotationSpeed = 100;
 
 function Update () 
 
 {
  var rotation : float = Input.GetAxis ("Horizontal") * rotation;
  Rotation *= Time.deltaTime;
  UnityEngine.Rigidbody; 
  AddRelativeTorque (Vector3.back * rotation);
 }
 

and at the moment im getting these errors: Assets/BallControll.js(11,2): BCE0005: Unknown identifier: 'AddRelativeTorque'.

Assets/BallControll.js(10,14): BCE0034: Expressions in statements must only be executed for their side-effects.

Assets/BallControll.js(9,2): BCE0005: Unknown identifier: 'Rotation'.

Assets/BallControll.js(8,56): BCE0005: Unknown identifier: 'rotation'.

and here is a screen shot just to give you an idea as to how this game might work alt text

screenshot 2014-08-20 12.07.24.png (111.2 kB)
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Answer by Landern · Aug 20, 2014 at 01:05 PM

well:

 #pragma strict
 
 var RotationSpeed = 100;
  
 function Update () 
 {
  var rotation : float = Input.GetAxis ("Horizontal") * rotation;
  Rotation *= Time.deltaTime;
  UnityEngine.Rigidbody; 
  AddRelativeTorque (Vector3.back * rotation);
 }

lets see...

      var rotation : float = Input.GetAxis ("Horizontal") * rotation;
 

You're declaring a variable called "rotation", but you're trying to use that variable which you're declaring in the same declaration. Did you mean to use RotationSpeed?

 Rotation *= Time.deltaTime;

You haven't declared a variable called Rotation, what did you mean?

 UnityEngine.Rigidbody;

This is a type in the UnityEngine namespace, this does nothing. Remove it.

 AddRelativeTorque (Vector3.back * rotation);

This is a method on a rigidbody, did you mean:

 rigidbody.AddRelativeTorque (Vector3.back * rotation); // This applies to the rigidbody on the gameobject this script is attached to.

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avatar image evildumdum · Aug 20, 2014 at 01:54 PM 0
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alright thank you it's working now

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