dump-points

#!/usr/bin/env python

import struct
import sys

def main():
    if len(sys.argv) != 2:
        raise SystemExit("error: usage: %s <input file>\n" % (
                sys.argv[0]))

    with open(sys.argv[1]) as f:
        data = f.read()
        header_fmt = "@iffi"
        pt_fmt = "@ff"
        header_size = struct.calcsize(header_fmt)
        pt_size = struct.calcsize(pt_fmt)
        num_points, generation_time, radius, is_tiled = struct.unpack(
            header_fmt, data[:header_size])

        print '{'
        print '  "num_points" : %r,' % (num_points,)
        print '  "generation_time" : %r,' % (generation_time,)
        print '  "radius" : %r,' % (radius,)
        print '  "is_tiled" : %r,' % (is_tiled,)
        print '  "points" : ['
        for i in range(num_points):
            pt_base = header_size + i*pt_size
            x, y = struct.unpack(pt_fmt, data[pt_base:pt_base + pt_size])
            print "    [%r, %r]%s" % (x, y, (",", "")[i + 1 == num_points])
        print '  ]'
        print '}'

if __name__ == '__main__':
   main()