thalassogen
SOC-12
Thanks for the hint - and online it goes!
T5 Web Apps
- Thread starter thalassogen
- Start date
thalassogen
SOC-12
The server is shutting down now. I'll inform you when it is running again.
FT3 has a corrected fractal algorithm. So the out-put of FT2 and FT3 are not compatable. The programmer explained on the Profantasy forum. (it is back aways)
http://forum.profantasy.com/
thalassogen
SOC-12
It's back online again!
Quick question, has the T5 had an errata applied for its sectors? P.423 lists sub-sectors alphabetically. It misses 'I'.
I generated a sector with your (really useful) site, it included sector I. Just checking, but it's not exactly a major issue for me renaming a couple of sectors here and there.
EDIT:
I don't want to be a pain, but I think I found a bug. I have tried uploading a csv file and I got an error. So, I used the random generator you have, saved to csv and re-uploaded it back to your site. It gives me this:
If this is a known issue and has been mentioned up thread, apologies. I will edit my most tio reflect that.
I generated a sector with your (really useful) site, it included sector I. Just checking, but it's not exactly a major issue for me renaming a couple of sectors here and there.
EDIT:
I don't want to be a pain, but I think I found a bug. I have tried uploading a csv file and I got an error. So, I used the random generator you have, saved to csv and re-uploaded it back to your site. It gives me this:
If this is a known issue and has been mentioned up thread, apologies. I will edit my most tio reflect that.
thalassogen
SOC-12
And it misses "O", but I did not use p.423. I based my map on p.422 and that has "I" and "O". I guess, you have found errata - one of two pages is wrong...
Concerning the error you found: Yes, this one is real and new. Sometimes, special characters get escaped in the form "&nnnn;" and as you see, there is an ";" used for escaping. But the semicolon is the column divider and therefore has to be itself escaped if used within a name! I will look into this and try to post an update today.
And: I am glad for every error found and I am informed about by the finder. So you are definitely not a pain! Thanks for testing and posting your findings!
thalassogen
SOC-12
Download and Upload of Sector CSV fixed.
The bug meant that the fractal algorithm output depended on specific hardware and file system factors so even the same version of FT2 ona different computer or after a directory reorganization might be different.
If you still have FT2 and your original files you can open them in FT2, check the file looks ok, then use the 'Burn to Surface' option and save the full height map data directly to disk. It'll take a lot more disk space, but you should be able to open the resulting map in FT3.
Simon Hibbs
Thalassogen's T5 SectorMaker works really well to generate my original game setting. I can tweak things on an .xls or Open Office format, feed it back as a .csv and it shows the revised sector perfectly (except my #Worlds column got corrupted for some reason). I would have gone nuts trying to generate the star-system orbits with dice for an average 640 systems per sector.
SOARN: Stress Only As Really Needed.
thalassogen
SOC-12
In the last week I worked primarily on another project...
For my own Traveller campaign I desired a more organic and more detailed star generation process and so I began to devise one of my own. The result is based on current astrophysics as far as I could get access to.
Stellar mass is generated using the Canonical Initial Mass Function. Stellar remnant mass is based on an observed initial-mass-final-mass relation for masses above 0.5 solar masses. Generated stars are aged through the main sequence and approximated/simplified evolutionary tracks based on initial mass. Radius, luminosity, and surface temperature (and thereby spectral and luminosity class) are calculated based on these internal models "for every day of a star's life". After a star's death its remnant's basic properties are also determined.
Stellar mass allows for orbital period calculations (aka year length). Radius provides needed details for Jump Drive operation. Change of luminosity is of interest to me because of changes in systems due to a heating up sun.
Would this alternate system (and that level of detail) be of interest to you?
For my own Traveller campaign I desired a more organic and more detailed star generation process and so I began to devise one of my own. The result is based on current astrophysics as far as I could get access to.
Stellar mass is generated using the Canonical Initial Mass Function. Stellar remnant mass is based on an observed initial-mass-final-mass relation for masses above 0.5 solar masses. Generated stars are aged through the main sequence and approximated/simplified evolutionary tracks based on initial mass. Radius, luminosity, and surface temperature (and thereby spectral and luminosity class) are calculated based on these internal models "for every day of a star's life". After a star's death its remnant's basic properties are also determined.
Stellar mass allows for orbital period calculations (aka year length). Radius provides needed details for Jump Drive operation. Change of luminosity is of interest to me because of changes in systems due to a heating up sun.
Would this alternate system (and that level of detail) be of interest to you?
esampson
SOC-13
I would be really interested in the information you're using. I built up a Google docs spreadsheet (https://docs.google.com/spreadsheet/ccc?key=0AvFOsTm2vhO_dGhOUW5McTdTOUY3eldJU1kwSTFmaEE#gid=7) a few weeks ago to try and get better information about planets, temperatures, and atmosphere (there's a lot of wiggle all over the place so as long as a planet is within a habitable zone you can pretty much pick the temperature you want it to be, within reason, but it is still useful because at least I can say why this planet has an average temperature of 18c).
The stellar data I'm using is what I would term 'moderately accurate', based on some graphs and interpretation of those graphs that are then crosschecked against some existing stars, but I've been digging around trying to see if I could find something more definitive.
The stellar data I'm using is what I would term 'moderately accurate', based on some graphs and interpretation of those graphs that are then crosschecked against some existing stars, but I've been digging around trying to see if I could find something more definitive.
thalassogen
SOC-12
I'll put the basic info into a web page and then link to it from here. I am just upgrading from single stars to multi-star systems and will then have a look at aging those stars together, and hopefully I will be able to produce something like type Ia supernovas for close binaries, etc.
thalassogen
SOC-12
Great, esampson!
I just upload a million stars generated by my models for some statistical analysis in two files (one using "." as decimal sign and one using "," - my German Excel doesn't like the dot). Those files are zipped but still about 19 MB large:
1000000_Random_Stars.zip (using the dot)
1000000_Random_Stars_de.zip (using the comma)
EDIT: Some explanation is due, I guess:
Column "Star": lists current spectral class (OBAFGKM + LTY) and luminosity class (Ia-0, Ia, Ib, II, III, IV, V, D - I don't use VI as that seems to be a special case not normally seen in the galactic disk: old low-mass main-sequence stars that seem hotter due to far lower heavy-element percentage and therefore lower opacity - more core heat coming through)
Column "Age": lists the age in Gyr (10^9 years)
Column "Lifetime": lists the total lifetime (main-sequence + post-main-sequence) in Gyr
Column "Current Mass": lists the current mass in solar units (will only differ from initial mass if star is dead)
Column "Initial Mass": lists the initial mass in solar units as generated by the IMF
Column "Luminosity": lists current luminosity in solar units
Column "Surface Temperature": lists current surface temperate in Kelvin
I just upload a million stars generated by my models for some statistical analysis in two files (one using "." as decimal sign and one using "," - my German Excel doesn't like the dot). Those files are zipped but still about 19 MB large:
1000000_Random_Stars.zip (using the dot)
1000000_Random_Stars_de.zip (using the comma)
EDIT: Some explanation is due, I guess:
Column "Star": lists current spectral class (OBAFGKM + LTY) and luminosity class (Ia-0, Ia, Ib, II, III, IV, V, D - I don't use VI as that seems to be a special case not normally seen in the galactic disk: old low-mass main-sequence stars that seem hotter due to far lower heavy-element percentage and therefore lower opacity - more core heat coming through)
Column "Age": lists the age in Gyr (10^9 years)
Column "Lifetime": lists the total lifetime (main-sequence + post-main-sequence) in Gyr
Column "Current Mass": lists the current mass in solar units (will only differ from initial mass if star is dead)
Column "Initial Mass": lists the initial mass in solar units as generated by the IMF
Column "Luminosity": lists current luminosity in solar units
Column "Surface Temperature": lists current surface temperate in Kelvin
Last edited:
Type VI Stars
Type VI (also called Type "sd") do occur in the galactic disk, but it is primarily because they are on long elliptic orbits about the galactic center inclined to the plane of the galaxy. So when their orbit intersects the disk twice on each orbit, you will find them. There is one in Sol's back yard - Kapteyn's Star.
http://en.wikipedia.org/wiki/Kapteyn's_Star
Type VI (also called Type "sd") do occur in the galactic disk, but it is primarily because they are on long elliptic orbits about the galactic center inclined to the plane of the galaxy. So when their orbit intersects the disk twice on each orbit, you will find them. There is one in Sol's back yard - Kapteyn's Star.
http://en.wikipedia.org/wiki/Kapteyn's_Star
thalassogen
SOC-12
OK, nice hint. I will put metallicity evaluation on my TODO list.
I hope you'll excuse the off-topic post, but this I found a funny coincidence. I followed your link there to learn more about this star and other types like it. As I did I began wondering if I could use it in a story, since I'm a writer. Thinking that, I ended up looking at the link in that article that shows when this star has been used in fiction. There I found something amazing: just last year a novel was written with it in that was written by none other than William H. Keith, Jr.
I just found it hillarious that I followed a link from a Traveller forum to learn more about astronomy, only to be lead right back to one of the greats of Traveller history. Anyway, just had to mention that. 
thalassogen
SOC-12
Man, subdwarfs are a peculiar lot. Two days of research (praise the i-net!) and calculations and at last I am able to model the effects of low-metallicity in a satisfying way; Kapteyn's Star got reproduced almost exactly.
Sadly there is no easy way to determine metallicity. Even today low-metal stars may form and even 10 Gyr ago metal-rich stars could have formed. So I will insert some randomization into the process - the third random stat (besides mass and age), everything else will still be calculated.
Sadly there is no easy way to determine metallicity. Even today low-metal stars may form and even 10 Gyr ago metal-rich stars could have formed. So I will insert some randomization into the process - the third random stat (besides mass and age), everything else will still be calculated.
