Systems lua to json

[impaktor]

Convert the local stars and bright stars tables to json (from lua)

Commit message:

Note following comments could not be carried over:

• 44 Boötis B/C are a W-Ursae-Majoris-type shallow contact binary system,
  both G class,

• '40 Eridani' - Problem: the secondary and tertiary are co-orbital,
  and as a system orbit the primary.

• 'Mu Herculis' - Problem: the secondary and tertiary are co-orbital,
  and as a system orbit the primary.

• 'Alpha Centauri' - Comment: "Gliese 559", "FK5 538", "GC 19728",
  "CCDM J14396-6050"

EDIT: I've updated above comments into the comment field I did not know our json format had.

[impaktor]

Comparison:

Master

This branch

Master

This branch

Master

This branch

[impaktor]

OK, positions above were off by factor 8, below is script to fix it, and gif now comparing. There's one star that seems to be moving south east of Sol:

Code

import json

# fpath = "partial/02_local_stars.json"
fpath = "partial/03_bright_stars.json"


with open(fpath) as f:
    systems = json.load(f)

# All Lua values for in-sector position need to be multiplied by 8 to
# turn them into lightyears (TLDR: json uses ly for units, lua uses
# percent-of-a-sector)
for i in range(len(systems)):
    systems[i]['pos'] = [s * 8 for s in systems[i]['pos']]

# Dump as is
# with open('data.json', 'w') as f:
#     json.dump(systems, f)

# Don't json format
out = json.dumps(systems, indent=None)

# Make one system per line:
out = out.replace("}, {", "},\n{")

with open('data.json', 'w') as f:
    f.write(out)

Comparison

[impaktor]

Just checked on master. The star that's popping in/out above is "GJ 1075", this was the only star in 02_local_stars.json on master, and was copied over from it's lua counterpart and had already been multiplied with x8, thus I should rollback the x8 my parsing just did for that line.

[sturnclaw]

These should be using utf-8 codepoints, not ASCII-fied UTF-16 escapes (which is the default python json.dump behavior).

[impaktor]

fixed & good catch

[sturnclaw]

One final issue - the apostrophe-to-double quote path is converting this Lua-side escaped apostrophe into an escaped double-quote. Feel free to manually fix it (with a grep for other occurrences).