From: Michael T. Jones (mtj3++at++intrinsic.com)
Date: 04/15/2001 10:53:34
| Does anyone know a tool that can be used to generate the .star files
| imported by Perfomer?
It's not an "official" format. I wanted a star-field so I searched the
web for astronomical data, finding the "Yale Compact Star Chart of
Bright Stars." I wrote an AWK program to convert the data into the
X/Y/Z/Log-brightness-from-earth/Bayer-Flamsteed-name file that
you see as 3010.star in the Performer distribution. That program
is probably still on the Performer team's server...
| The only details I can find are what is noted in the Perfomer
| Importer guide
| "Yale University compact star chart data", but a search at Yeal or on the
| web hasn't turned up much but the 3010.star file that comes with the
| Performer distribution.
Try harder.
http://adc.gsfc.nasa.gov/adc-cgi/cat.pl?/catalogs/5/5050/
(database and description)
http://www.fg-kometen.de/icqrec.txt
(recommended source)
| What I want is a 3010.star but with half as many
| light points.
|
| Anyone know how to cut these files down?
No longer having Performer nearby, I can't be sure, but I think that
they are sorted by apparent brightness. If not that's easy to do with
sort -n +(field # of brightness)
When you're done, just chop off the dim ones. (This would not work
well if you only kept too few though, since Orion might find his belt to
be missing a few stars ;-)
Michael T. Jones mtj++at++intrinsic.com <mailto:mtj++at++intrinsic.com>
http://www.intrinsic.com/ <http://www.intrinsic.com/>
Intrinsic Graphics, 1340 Space Park Way, Mountain View, CA 94043
Phone (650) 966-6803 / Fax (650) 966-6903
A frog in a well says "The sky is as big as the mouth of my well"
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