koobas.hobune.stream
Smooth 2D rotation unexpected
Hi, I am trying to use smoothDamp to get a smooth 2D rotation going but I can't seem to get the code right... Any help would be very appreciated!
using UnityEngine;
using System.Collections;
public class smoothCheck : MonoBehaviour {
public Vector3 diff;
public float rot_z;
public float smoothTime = 0.3f;
private float yVelocity = 0.0f;
private float newPosition;
void Update () {
Vector3 diff = Camera.main.ScreenToWorldPoint(Input.mousePosition) - transform.position;
diff.Normalize();
rot_z = Mathf.Atan2(diff.y, diff.x) * Mathf.Rad2Deg;
rot_z = rot_z - 90;
float current = transform.eulerAngles.z;
newPosition = Mathf.SmoothDamp(current, rot_z, ref yVelocity, smoothTime);
transform.rotation = Quaternion.Euler(0.0f, 0.0f, newPosition);
}
}
It seems like the rotation only works in quadrant 2 but not in quadrant 1,3,4. I am not sure what I am doing wrong...
here is an example of what is happening. https://www.youtube.com/watch?v=YDnLRPIksPE&feature=youtu.be
debug your rotation like this:
for( int i = 0; i < 360; ++i )
{
float x = Mathf.Cos( i*Mathf.Deg2Rad );
float y = Mathf.Sin( i*Mathf.Deg2Rad );
rot_z = Mathf.Atan2(y, x) * Mathf.Rad2Deg;
rot_z = rot_z - 90;
float current = transform.eulerAngles.z;
newPosition = Mathf.SmoothDamp(current, rot_z, ref yVelocity, smoothTime);
Debug.Log( rot_z );
Debug.Log( current );
Debug.Log( newPosition );
}
When I debugged it my game was running very slow and in this script I don't know where to insert the information from the mouse, Screen to world point.
i'm sorry, i should explain in detail :)
use the above code in the Start() or Awake() function, so it executes only 1 time.
this code will simulate rotating the mouse in a full circle of 360°
you will get 360 results in your unity console with the Debug.Log() function
from this 360 results in the unity console, you can see how rot_z, current and newPosition change from 0° to 360° and that should help you find what is wrong
