koobas.hobune.stream
How many degrees must object turn in y-axis to face target?
Hi!
I have a player object and a target object. By clicking I can set the target object to any location in the scene. The player object turns then towards the target in y-Axis with Quaternion.LookRotation. I want the turning speed of the player to be in relation to how many degrees he has to turn in y-Axis when the target is stet to a new location. How can I get the amount of degrees in y-Axis the player will have to turn to a new set target? Thank you!
Best Answer
Use this function. It was written with assumption that the vectors are in the XZ plane (that is why it checks cross.y for the sign).
Vector3 one = playerObject.transform.forward;
Vector3 two = targetObject.transform.position - playerObject.transform.position;
/// <summary>
/// Angle between vectors from -179 to 180.
/// </summary>
/// <returns>From -179 to 180.</returns>
/// <param name="one">One.</param>
/// <param name="two">Two.</param>
public static float AngleBetweenVectors(Vector3 one, Vector3 two)
{
float a = one.sqrMagnitude;
float b = two.sqrMagnitude;
if (a > 0.0f && b > 0.0f)
{
float angle = Mathf.Acos(Vector3.Dot(one, two) / Mathf.Sqrt(a * b)) * 180.0f / Mathf.PI;
Vector3 cross = Vector3.Cross(one, two);
//float sign = Mathf.Min( Mathf.Min(cross.x, cross.y), cross.z );
float sign = cross.y;
if (sign < 0.0f)
return -angle;
else
return angle;
}
return 0.0f;
}
