def change_first_point_by_index(self, point_idx):
        """
        Set the first point of the exterior to the given point based on its index.

        Note: This method does *not* work in-place.

        Parameters
        ----------
        point_idx : int
            Index of the desired starting point.

        Returns
        -------
        imgaug.Polygon
            Copy of this polygon with the new point order.

        """
        ia.do_assert(0 <= point_idx < len(self.exterior))
        if point_idx == 0:
            return self.deepcopy()
        exterior = np.concatenate(
            (self.exterior[point_idx:, :], self.exterior[:point_idx, :]),
            axis=0
        )
        return self.deepcopy(exterior=exterior)
def change_first_point_by_index(self, point_idx):
        """
        Set the first point of the exterior to the given point based on its index.

        Note: This method does *not* work in-place.

        Parameters
        ----------
        point_idx : int
            Index of the desired starting point.

        Returns
        -------
        imgaug.Polygon
            Copy of this polygon with the new point order.

        """
        ia.do_assert(0 <= point_idx < len(self.exterior))
        if point_idx == 0:
            return self.deepcopy()
        exterior = np.concatenate(
            (self.exterior[point_idx:, :], self.exterior[:point_idx, :]),
            axis=0
        )
        return self.deepcopy(exterior=exterior)
def change_first_point_by_index ( self , point_idx ) : ia . do_assert ( 0 <= point_idx < len ( self . exterior ) ) if point_idx == 0 : return self . deepcopy ( ) exterior = np . concatenate ( ( self . exterior [ point_idx : , : ] , self . exterior [ : point_idx , : ] ) , axis = 0 ) return self . deepcopy ( exterior = exterior )
Set the first point of the exterior to the given point based on its index.

        Note: This method does *not* work in-place.

        Parameters
        ----------
        point_idx : int
            Index of the desired starting point.

        Returns
        -------
        imgaug.Polygon
            Copy of this polygon with the new point order.
Set the first point of the exterior to the given point based on its index .