public Angle smoothAngle(Angle from, Angle to, float xsmooth, float ysmooth)
  {
    Angle delta = clampAngles(new Angle(from.x - to.x, from.y - to.y));
    delta.x *= xsmooth;
    delta.y *= ysmooth;
    return clampAngles(from.minus(delta));
  }

  public static double normalizeAngle(double angle)
  {
    return (angle % 360.0D + 360.0D) % 360.0D;
  }

  public Angle normalizeAngle(Angle a)
  {
    if (a.x > 180.0F) {
      a.x -= 360.0F;
    }
    if (a.x < -180.0F) {
      a.x += 360.0F;
    }
    if (a.y > 180.0F) {
      a.y -= 360.0F;
    }
    if (a.y < -180.0F) {
      a.y += 360.0F;
    }
    return a;
  }

  public Angle clampAngles(Angle AngleToNormalize)
  {
    Angle vec = AngleToNormalize;
    if ((vec.x() > 89.0F) && (vec.x() <= 180.0F)) {
      vec.setX(89.0F);
    }
    while (vec.x() > 180.0F) {
      vec.setX(vec.x() - 360.0F);
    }
    while (vec.x() < -89.0F) {
      vec.setX(-89.0F);
    }
    while (vec.y() > 180.0F) {
      vec.setY(vec.x() - 360.0F);
    }
    while (vec.y() < -180.0F) {
      vec.setY(vec.y() + 360.0F);
    }
    return vec;
  }