Why isn`t my 2D AddTorque working?

Question

Hello I have this C# script attached to player in Fixed Update:

 rigidbody2D.AddTorque(Input.GetAxis ("Horizontal") * 5f);

It just won`t work. AddForce works and everything else in that script just not this.

What I have tried so far:

 if(Input.GetButton("Horizontal"))
      rigidbody2D.AddTorque(5f);

Even this won`t work in Update without any key check:

 rigidbody2D.AddTorque(5f);

Yes script is attached, Yes object has Rigidbody2D. As I said, AddForce works, just torque not. Is Kinematic and Fixed angle are Checked OFF.

Please help I am getting hopeless.

Answer 1

Best Answer

Answer by Wrymnn · Oct 06, 2014 at 01:35 PM

THE SOLUTION:

2D addTorque is bugged.

When you do this:

 public float rotationSpeed; //And now you assaign it in inspector
 void FixedUpdate()
 {
      rigidbody2D.AddTorque(Input.GetAxis ("Horizontal") * rotationSpeed);
 }

It won`t work. Because it`s bugged. But when you don`t assaign it in the inspector, it works fine.

 void FixedUpdate()
 {
      float rotationSpeed = 5.0f; 
      rigidbody2D.AddTorque(Input.GetAxis ("Horizontal") * rotationSpeed);
 }

This works. At least for me.

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brentshermana · Nov 16, 2015 at 12:43 AM 0

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Had the exact same problem and solution. Thanks so much for posting! (You would think the people over at Unity would have fixed something like this by now...)

nicmarxp · Nov 05, 2020 at 01:03 PM 0

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I still have this problem, Unity 2020.1. How should I fix it, so I can change the value from the inspector? Hard coding a value works, just like you wrote here, but I don't think it's an ideal solution :)

Answer 2

Answer by unimechanic · Sep 29, 2014 at 07:35 PM

Maybe the value calculated with " Input.GetAxis ("Horizontal") * 5f " is too small for the mass of the object, try a very large one.

Also call WakeUp after adding the torque: http://docs.unity3d.com/ScriptReference/Rigidbody.WakeUp.html

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Wrymnn · Sep 30, 2014 at 05:35 AM 0

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No I think 2d add torque is a bit bugged.

But I solved my problem. Ty.

MorrisIO · Oct 06, 2014 at 10:22 AM 1

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$$anonymous$$ind sharing HOW you solved your problem, Wrymnn?

Why isn`t my 2D AddTorque working?

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