How to use the pyclipper.scale_to_clipper function in pyclipper

def paths_contain(pt, paths):
    cnt = 0
    pt = pyclipper.scale_to_clipper([pt], SCALING_FACTOR)[0]
    for path in paths:
        path = pyclipper.scale_to_clipper(path, SCALING_FACTOR)
        if pyclipper.PointInPolygon(pt, path):
            cnt = 1 - cnt
    return cnt % 2 != 0

def _prepare_clipper(self, poly):
        """Prepare 3D polygons for clipping operations.

        :param poly: The clip polygon.
        :returns: A Pyclipper object.

        """
        if not self.is_coplanar(poly):
            return False
        poly1 = self.project_to_2D()
        poly2 = poly.project_to_2D()

        s1 = pc.scale_to_clipper(poly1.vertices_list)
        s2 = pc.scale_to_clipper(poly2.vertices_list)
        clipper = pc.Pyclipper()
        clipper.AddPath(s1, poly_type=pc.PT_SUBJECT, closed=True)
        clipper.AddPath(s2, poly_type=pc.PT_CLIP, closed=True)

        return clipper

as appropriate for clipper.
    """

    # Get the lines along each dimension. h, v need not
    # correspond to the horizontal and vertical dimensions.
    # It's shorter than writing coord0, coord1
    lines = np.dstack((xedge, yedge))
    nh, nv, nd = lines.shape
    h_lines = [lines[i,:,:] for i in range(nh)]
    v_lines = [lines[:,j,:] for j in range(nv)]
    
    if scale:
        # The scale factor could be adjusted, but by default it results in 
        # a range of +/- 2 ** 31 with a precision of 2 ** -31. See the docs.
        h_lines = scale_to_clipper(h_lines)
        v_lines = scale_to_clipper(v_lines)
    return h_lines, v_lines

def offset(paths, amount):
    pco = pyclipper.PyclipperOffset()
    pco.ArcTolerance = SCALING_FACTOR / 40
    paths = pyclipper.scale_to_clipper(paths, SCALING_FACTOR)
    pco.AddPaths(paths, pyclipper.JT_SQUARE, pyclipper.ET_CLOSEDPOLYGON)
    outpaths = pco.Execute(amount * SCALING_FACTOR)
    outpaths = pyclipper.scale_from_clipper(outpaths, SCALING_FACTOR)
    return outpaths

def orient_path(path, dir):
    orient = pyclipper.Orientation(path)
    path = pyclipper.scale_to_clipper(path, SCALING_FACTOR)
    if orient != dir:
        path = pyclipper.ReversePath(path)
    path = pyclipper.scale_from_clipper(path, SCALING_FACTOR)
    return path