pocketmine\entity\Entity::getDirection PHP Method

    public function getDirection()
    {
        $rotation = ($this->yaw - 90) % 360;
        if ($rotation < 0) {
            $rotation += 360.0;
        }
        if (0 <= $rotation and $rotation < 45 or 315 <= $rotation and $rotation < 360) {
            return 2;
            //North
        } elseif (45 <= $rotation and $rotation < 135) {
            return 3;
            //East
        } elseif (135 <= $rotation and $rotation < 225) {
            return 0;
            //South
        } elseif (225 <= $rotation and $rotation < 315) {
            return 1;
            //West
        } else {
            return null;
        }
    }