PLIO to ISIS pixel type conversion (#355)

    : PvlObject

      Pvl object containing campt returns

    """

    point_type = point_type.lower()

    if point_type not in {"image", "ground"}:

        raise Exception(f'{point_type} is not a valid point type, valid types are ["image", "ground"]')

    if isinstance(x, Number) and isinstance(y, Number):

        x, y = [x], [y]

    with tempfile.NamedTemporaryFile("w+") as f:

        # ISIS wants points in a file, so write to a temp file

        if point_type == "ground":

            # campt uses lat, lon for ground but sample, line for image.

            # So swap x,y for ground-to-image calls

            x,y = y,x

        elif point_type == "image":

            # convert to ISIS pixels

            x = np.add(x, .5)

            y = np.add(y, .5)

        f.write("\n".join(["{}, {}".format(xval,yval) for xval,yval in zip(x, y)]))

        f.flush()

        try:

            pvlres = isis.campt(from_=cube_path, coordlist=f.name ,usecoordlist=True, coordtype=point_type)

            for r in pvlres:

                # convert all pixels to PLIO pixels from ISIS

                r[1]["Sample"] -= .5

                r[1]["Line"] -= .5

        except ProcessError as e:

            warn(f"CAMPT call failed, image: {cube_path}\n{e.stderr}")

            return

    return pvlres

def image_to_ground(cube_path, line, sample, lattype="PlanetocentricLatitude", lonttype="PositiveEast360Longitude"):

def image_to_ground(cube_path, sample, line, lattype="PlanetocentricLatitude", lonttype="PositiveEast360Longitude"):

    """

    Use Isis's campt to convert a line sample point on an image to lat lon

    return lats, lons

def ground_to_image(cube_path, lat, lon):

def ground_to_image(cube_path, lon, lat):

    """

    Use Isis's campt to convert a lat lon point to line sample in

    an image

    """

    pvlres = point_info(cube_path, lat, lon, "ground")

    pvlres = point_info(cube_path, lon, lat, "ground")

    lines, samples = np.asarray([[r[1]["Line"], r[1]["Sample"]] for r in pvlres]).T

    if len(lines) == 1 and len(samples) == 1:

        lines, samples = lines[0], samples[0]