Generate planets.

stars.py

@@ -28,11 +28,14 @@ Stars have what qualities?
   - brightness
   - size
 - Game stats
+  - age?
   - ?
 
+ 🌑 🌒 🌓 🌔 🌕 🌖 🌗 🌘
+ ♈ ♉ ♊ ♋ ♌ ♍ ♎ ♏ ♐ ♑ ♒ ♓
 
 '''
-from random import randint, expovariate, seed, getrandbits
+from random import randint, expovariate, seed, getrandbits, gauss
 from poisson import poisson
 
 
@@ -69,6 +72,15 @@ def generate_list_of_u64_for_ids(n):
 
 TABLES = [
     'create table stars (id INTEGER PRIMARY KEY, x INTEGER, y INTEGER, radius INTEGER)',
+    ('''\
+    create table planets (
+        id INTEGER PRIMARY KEY,
+        ordo INTEGER,'''  # The order from the star, counting from 1.
+        # I use "ordo" instead of "order" because "order" is a keyword
+        # in SQL (or at least it caused a syntax error in SQLite.)
+     '''star INTEGER,
+        FOREIGN KEY(star) REFERENCES stars(id)
+    )'''),
     ]
 
 
@@ -77,6 +89,8 @@ def init_db(conn):
     c = conn.cursor()
     for values in generate_stars(WIDTH, HEIGHT, MINIMUM_DISTANCE_BETWEEN_STARS):
         c.execute('insert into stars values (?, ?, ?, ?)', values)
+        star_id = values[0]
+        generate_planets_for_star(c, star_id)
     c.close()
     conn.commit()
 
@@ -106,4 +120,20 @@ def how_many_planets():
         n = round(gauss(5, 5))
     return n
 
+def generate_planets_for_star(c, star_id):
+    n = how_many_planets()
+    if n < 1:
+        return
+    for ordo in range(1, n + 1):
+        c.execute('insert into planets(ordo, star) values (?, ?)', (ordo, star_id))
 
+
+ROMAN_NUMBERS = [
+    None,
+    'I',   'II', 'III', 'IV', 'V',
+    'VI', 'VII', 'VIII',  'IX', 'X',
+    'XI', 'XII', 'XIII', 'XIV', 'XV',
+    'XVI', 'XVII', 'XVIII', 'XIX', 'XX',
+    'XXI', 'XXII', 'XXIII', 'XXIV', 'XXV',
+    'XXVI', 'XXVII', 'XXVIII', 'XXIX',
+    ]