grid.py

import math
import sys
import xy

def load_paths(filename):
    paths = []
    with open(filename) as fp:
        for line in fp:
            points = filter(None, line.strip().split(';'))
            if not points:
                continue
            path = [tuple(map(float, x.split(','))) for x in points]
            paths.append(path)
    return paths

def create_drawing(filename, x, y, w, h, p):
    paths = load_paths(filename)
    paths = xy.remove_duplicates(paths)
    drawing = xy.Drawing(paths)
    drawing = drawing.rotate_and_scale_to_fit(w - p, h - p, step=5)
    drawing = drawing.move(x + w / 2, y + h / 2, 0.5, 0.5)
    return drawing

def main(filenames, nx):
    paths = []
    w = h = 100
    p = 10
    for index, filename in enumerate(filenames):
        i = index % nx
        j = index / nx
        x = i * w
        y = j * h
        drawing = create_drawing(filename, x, y, w, h, p)
        paths.extend(drawing.paths)
    drawing = xy.Drawing(paths)
    drawing = xy.Drawing(paths).rotate_and_scale_to_fit(315, 380, step=90)
    drawing = drawing.move(315 / 2.0, 380 / 2.0, 0.5, 0.5)
    # drawing.paths = [x for x in drawing.paths if len(x) > 1]
    # drawing = drawing.simplify_paths()
    drawing = drawing.sort_paths_greedy()
    drawing = drawing.join_paths()
    # drawing = drawing.simplify_paths()
    im = drawing.render()
    im.write_to_png('grid.png')
    # xy.draw(drawing)

if __name__ == '__main__':
    main(sys.argv[1:], 4)