Rotate object ON THE CAMERA UP AXIS

Question

Hey.

I've created a rotation script in C# that will rotate a barrel according to the mouse.

I want the object to spin ON THE CAMERA UP AXIS.

Not the world's up axis.

Not the barrel's up axis. (It could be laying in any orientation.)

Not the barrel's parent's axis.

I want to rotate on the CAMERA UP AXIS.

Thanks!

alt text

Thanks :)

Answer 1

Answer by aldonaletto · Oct 06, 2012 at 11:04 PM

You could simply use Rotate - but specifying Space.World, so that the object would rotate around world axes:

 function Update(){
   transform.Rotate(0, Input.GetAxis("Mouse X") * speed, 0, Space.World);
 }

where speed is roughly the turning speed in degrees per second - I said roughly because the value returned by axis "Mouse X" is a small value proportional to how much the mouse moved since last frame, which depends on mouse sensitivity.

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Answer 2

Answer by rhys_vdw · Oct 07, 2012 at 11:33 AM

 public class MouseRotate : MonoBehaviour {
     [SerializeField] float m_rotateSpeed = 2f;
 
     void Update() {
         transform.RotateAround(Camera.main.transform.up,
                 Input.GetAxis("Mouse X") * m_rotateSpeed);
     }
 }

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Rotate object ON THE CAMERA UP AXIS

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