docs: private static float angleDeg(final float ax, final float ay,
                                    final float bx, final float by) {
          final double angleRad = Math.atan2(ay - by, ax - bx);
          double angle = Math.toDegrees(angleRad);
          if (angleRad < 0) {
              angle += 360;
          }
          return (float) angle;
      }