//Get the angle form R to D. based on the anti-Clockwise space(which we usually used in trigonometric function).
public static float AngleBetween_R_D_AntiClockwise(Vector2 refVector, Vector2 destinationVector)
{
WeiVector2Poarl pr = new WeiVector2Poarl(refVector);
WeiVector2Poarl pd = new WeiVector2Poarl(destinationVector);
return(pd.a - pr.a);
}
// Use this for initialization
void Start()
{
Vector2 v1 = new Vector2(1, -1);
Vector2 v2 = new Vector2(-1, -1);
//float angle = WeiVector2.AngleBetween(v1,v2);
float angle = new WeiVector2Poarl(v1).a;
Debug.Log(angle);
}
