README file for GURPS: Space Star Creator.

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Date: Sat, 23 Jun 2001 22:13:17 -0400 (EDT)
From: Me
To: gameaids@sjgames.com
Subject: "GURPS: Space" stellar-system generation program

 Dear Mr. Schmidt,

 I'm currently taking a course involving Visual Basic programming. To
self-test my skills, I'm attempting to write a program to automate the
system offered in GURPS: Space (3rd edition) for generating star systems
(pages 146 to 164).

 I'm currently designing the program to output a text file describing the
contents of each 1x1x1 parsec volume of space, as described in the series
of tables in GURPS: Space.

Thank you for your time,
-- 
Daniel Boese

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 Friday, June 29th, 2001, 10:30pm EDT:

 I've just finished changing a few things around for when the dice roll up a 
brown dwarf that erases every previously-rolled planet in the system. Not bad 
for somebody who didn't learn about "Select Case" until the program was already 
nearly complete, neh? :)

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Volume           Filesize  Time1  Time2
1 x 1 x 1        1 kb      0 s    0 s
10 x 10 x 10     150 Kb    0 s    0 s
32 x 32 x 32     5 Mb      4 s    4 s
50 x 50 x 50     19 Mb     16 s   18 s
100 x 100 x 100  150 Mb    136 s  150 s

 Time1 is the time it takes my machine (Celeron 400 MHz, 128 MB RAM) to create 
such a file. Time2 is with WinAmp running in the background.

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 If the filename already exists, GSSC will append the new info to the old.

 With Life Rolls at -3, no stars have "Intelligent Life".

 With Life Rolls at -2, only class M VI stars might have "Intelligent Life".

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 According to "Gurps: Space", in a given 3d volume, with the average distance 
between stars being 4 parsecs, here's what you might find in a given 1x1x1 
parsec volume:

 In an average galaxy, the odds are:
3,510/3,888 Empty Space
   54/3,888 Unusual Object
  270/3,888 1 star
   27/3,888 2 stars
   18/3,888 3 stars
    9/3,888 4 stars
For a total of 414 stars per 3,888 cubic parsecs, 1 star per ~9.39 cubic 
parsecs.

 In a cluster (up to 60 parsecs across) or galactic core area, the odds change 
somewhat:
3,168/3,888: Empty Space
   72/3,888: Unusual Object
  378/3,888: 1 star
   90/3,888: 2 stars
   72/3,888: 3 stars
  108/3,888: 4 stars
For a total of 1,206 stars per 3,888 cubic parsecs, 1 star per ~3.22 cubic 
parsecs. (An average of 35,081 stars for a 60x60x60-parsec cluster.)

--

Unusual objects:
43,200/93,312: Lone planet, terrestrial
19,872/93,312: Lone planet, gas giant
10,800/93,312: Brown dwarf and moon
 6,480/93,312: SS Cygni catastrophic variable
 2,592/93,312: X-ray star
 2,592/93,312: Centre of nova shell
 1,296/93,312: Black dwarf
 1,296/93,312: Nebula, 1-6 parsec diameter
   512/93,312: Neutron star
   104/93,312: Black hole
    54/93,312: Nova
    50/93,312: Black hole, x10 mass
    50/93,312: Wormhole
    42/93,312: Nebula, 3-18 parsec diameter
    42/93,312: X-ray burster
    30/93,312: Black dwarf with planets
    20/93,312: Protostar nebula, 1-6 parsec diameter, 1-6 protostars
    12/93,312: Pulsar
    12/93,312: Dyson sphere
     6/93,312: Planetary nebula, 0.1-0.6 parsec diameter
     6/93,312: Nebula, 6-36 parsec diameter
     2/93,312: Antimatter system
     1/93,312: Pulsar and supernova remnant
     1/93,312: Neutron star and supernova remnant

Stars:
1,297,296,000/1,939,956,480: M V (Red main-sequence.)
  170,270,100/1,939,956,480: K V (Orange main-sequence. Mass 0.9.)
  121,621,500/1,939,956,480: G V (Yellow main-sequence. Mass 1.1.)
   89,812,800/1,939,956,480: D (White dwarf. Mass 0.8.)
   89,812,800/1,939,956,480: F V (Yellow-white main-sequence. Mass 1.9.)
   48,648,600/1,939,956,480: A V (White main-sequence Mass 3.0.)
   44,906,400/1,939,956,480: M VI (Red subdwarf. Mass 0.2.)
   24,324,300/1,939,956,480: B V (Blue-white main-sequence. Mass 10.)
   14,968,800/1,939,956,480: G VI (Yellow subdwarf. Mass 0.8.)
   14,968,800/1,939,956,480: K VI (Orange subdwarf. Mass 0.5.)
    8,108,100/1,939,956,480: O V (Blue main-sequence. Mass 50.)
    3,682,800/1,939,956,480: K III (Orange giant. Mass 3.0.)
    1,411,200/1,939,956,480: K IV (Orange subgiant. Mass 2.3.)
    1,288,980/1,939,956,480: B III (Blue-white giant. Mass 30.)
    1,104,840/1,939,956,480: A III (White giant. Mass 6.0.)
      493,920/1,939,956,480: B IV (Blue-white subgiant. Mass 20.)
      423,360/1,939,956,480: A IV (White subgiant. Mass 4.0.)
      368,280/1,939,956,480: M III (Red giant. Mass 4.0.)
       71,280/1,939,956,480: K II (Orange large giant. Mass 6.0.)
       24,948/1,939,956,480: B II (Blue-white large giant. Mass 35.)
       21,384/1,939,956,480: A II (White large giant. Mass 10.)
       15,400/1,939,956,480: K Ib (Orange larger giant. Mass 12.)
        7,700/1,939,956,480: K Ia (Orange largest giant. Mass 15.)
        7,128/1,939,956,480: M II (Red large giant. Mass 8.0.)
        5,390/1,939,956,480: B Ib (Blue-white larger giant. Mass 40.)
        4,620/1,939,956,480: A Ib (White larger giant. Mass 16.)
        2,695/1,939,956,480: B Ia (Blue-white largest giant. Mass 50.)
        2,310/1,939,956,480: A Ia (White largest giant. Mass 30.)
        1,540/1,939,956,480: M Ib (Red larger giant. Mass 16.)
          770/1,939,956,480: M Ia (Red largest giant. Mass 20.)
          770/1,939,956,480: O Ib (Blue larger giant. Mass 60.)
          385/1,939,956,480: O Ia (Blue largest giant. Mass 70.)
            0/1,939,956,480: F Ia (Yellow-white largest giant. Mass 15.)
            0/1,939,956,480: F Ib (Yellow-white larger giant. Mass 13.)
            0/1,939,956,480: F II (Yellow-white large giant. Mass 8.0.)
            0/1,939,956,480: F III (Yellow-white giant. Mass 2.5.)
            0/1,939,956,480: F IV (Yellow-white subgiant. Mass 2.2.)
            0/1,939,956,480: G Ia (Yellow largest giant. Mass 12.)
            0/1,939,956,480: G Ib (Yellow larger giant. Mass 10.)
            0/1,939,956,480: G II (Yellow large giant. Mass 6.0.)
            0/1,939,956,480: G III (Yellow giant. Mass 2.7.)
            0/1,939,956,480: G IV (Yellow subgiant. Mass 1.8.)

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Programmed by: Daniel Eliot Boese <dboese@becon.org>

GURPS is a trademark of Steve Jackson Games Incorporated, used by permission. 
All rights reserved.

The GURPS game is copyright (c) 2001 by Steve Jackson Games Incorporated. This 
program includes copyrighted material from the GURPS game, which is used by 
permission of Steve Jackson Games Incorporated. All rights reserved by Steve 
Jackson Games Incorporated.

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