Scripts for automating G2XPL scenery downloads

download.bat

C:\Users\Bastian\Miniconda3\python.exe download.py "poly files/na_ca_manitoba.poly"
C:\Users\Bastian\Miniconda3\python.exe download.py "poly files/na_ca_quebec.poly"
C:\Users\Bastian\Miniconda3\python.exe download.py "poly files/na_ca_newfoundland-and-labrador.poly"
pause

download.py

import sys
import re
import os.path
from math import ceil, floor
import numpy as np
from matplotlib.path import Path

def main(filename):

    # read polygon file
    polygon = []
    for line in open(filename):
        if len(line.split()) != 2:
            # line does not contain coordinates
            continue
        # convert line into two floating point numbers
        polygon.append([float(f) for f in line.split()])
    polygon = np.array(polygon)
    polygon_path = Path(polygon)

    # calculate all lat/lon centers inside the polygon. This tries all lat/lon
    # combinations in a rectangle superset of the polygon coordinates.
    coordinates = []
    for lat in np.arange(floor(min(polygon[:,0]))-0.5,
                         ceil(max(polygon[:,0]))+1.5):
        for lon in np.arange(floor(min(polygon[:,1]))-0.5,
                             ceil(max(polygon[:,1]))+1.5):
            if polygon_path.contains_point((lat, lon)):
                coordinates.append((lon, lat))

    print("\n### polygon file covers", len(coordinates), "tiles. ###\n")

    # exit program if the polygon file did not cover any tiles
    if len(coordinates) == 0:
        return

    # the new scenery name will be "z_G2xpl_<polyfilename>"
    scenery_name = 'z_G2xpl_' + os.path.splitext(os.path.basename(filename))[0]

    # download the tiles using g2xpl
    for idx, (lat, long) in enumerate(coordinates):
        print("\n### downloading tile", idx+1, "of", len(coordinates), "###\n")

        # read the g2xpl configuration file
        with open('g2xpl.ini') as f:
            ini = f.read()

        # change lat/lon, and scenery name in configuration
        ini = re.sub('plane_long\s*=\s*[-+0-9.]+',
                     'plane_long='+str(long), ini)
        ini = re.sub('plane_lat\s*=\s*[-+0-9.]+',
                     'plane_lat='+str(lat),  ini)
        ini = re.sub('scenery_name\s*=\s*.+',
                     'scenery_name='+scenery_name, ini)

        # write changed g2xpl configuration file
        with open('g2xpl.ini', 'w') as f:
            f.write(ini)

        # run g2xpl (it will pick up the changes in the configuration file)
        os.system('g2xpl.exe')

    print("\n### all downloads done. ###\n")

if __name__ == "__main__":
    main(sys.argv[1])