Rotate 2d object to facing direction

Question

Hello Unity Community, I have some problems.

Im using accelerometer for moving my 2d sprite and the problem comes when i want to rotate my 2d sprite according to the device's accelerometer direction.

Now my code is rotating my character but not on the z axes, only on y and x

Do you know how can i do it to rotate only on z axes and to be facing to the direction

This is my code:

 void Update () 
     {

          Vector3 move = Vector3.zero ;
          move.x= Input.acceleration.x;
          move.z = Input.acceleration.y;
 
         transform.Translate(Vector3.right * (move.x * maxSpeed) * Time.deltaTime,Space.World);
         transform.Translate(Vector3.up * (move.z * maxSpeed) * Time.deltaTime);
 
     
         if (move != Vector3.zero)
         {
             transform.rotation = Quaternion.LookRotation(-move);
         }
 }

Any help will be appreciated !

Answer 1

Best Answer

Answer by robertbu · Mar 15, 2014 at 10:27 PM

I cannot verify your accelerometer calculations. If the vector is right, you can do this:

 Vector3 dir = -move;
 float angle = Mathf.Atan2(dir.y, dir.x) * Mathf.Rad2Deg;
 transform.rotation = Quaternion.AngleAxis(angle, Vector3.forward);

This code assumes the front of the 2D object is on the right. If the front is up, then you need to subtract 90 from the angle before passing it to AngleAxis().

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uanmanarmy · Mar 16, 2014 at 09:10 AM 0

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The rotation its working but now im facing with another problem. On the x axis it is moving very well but it dont move on the y ax , to move it on the y i have to face my device on the y +x , something in the middle

uanmanarmy · Mar 16, 2014 at 09:39 AM 0

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Also when im facing a negative direction its moving on the opposite direction

uanmanarmy · Mar 16, 2014 at 09:42 AM 0

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Done, i fixed it i change both direction to Space.World

Thank you again!! :3

Rotate 2d object to facing direction

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