/* Based on http://answers.unity3d.com/questions/705524/how-do-i-make-an-object-look-at-an-another-object.html */
public static void LookAt2D(Vector3 dest, Transform tran, float rotationSpeed, float rotationOffset)
{
Vector2 lookDir = Utilites2D.Difference(dest, tran);
float angle = Mathf.Atan2(lookDir.y, lookDir.x) * Mathf.Rad2Deg;
Quaternion quat = Quaternion.AngleAxis(angle + rotationOffset, Vector3.forward);
tran.rotation = Quaternion.Euler(
Vector3.RotateTowards(
tran.rotation.eulerAngles,
quat.eulerAngles,
rotationSpeed * Time.deltaTime,
rotationSpeed * Time.deltaTime));
}
public static Vector2 Difference(Vector3 vector, Transform tran)
{
Vector2 difference = Utilites2D.Location2D(vector) - Utilites2D.Location2D(tran);
return(difference);
}
public static Vector2 Difference(Transform tranA, Transform tranB)
{
Vector2 difference = Utilites2D.Location2D(tranA) - Utilites2D.Location2D(tranB);
return(difference);
}
public static Vector2 Difference(Vector3 vectorA, Vector3 vectorB)
{
Vector2 difference = Utilites2D.Location2D(vectorA) - Utilites2D.Location2D(vectorB);
return(difference);
}