Version : 2.2
Author(s) : Wayne Schlitt, (firstname.lastname@example.org)
License : GPL
Disk space required for installation is 1.09 Mb
A shortcut will be installed in the KDE/GNOME desktop menu system,
as an entry in the Astronomy submenu
This program solves the n-body problem, and displays the results on
the screen. It starts by putting a bunch of stars on the screen,
then it lets the inter-body gravitational forces move the stars
around. The result is a lot of neat wandering paths, as the stars
interact and collide.
XStar can be used to animate the root window, as a screen saver or
to display stuff in a regular window.
The XStar N-body Solver
XStar is a Unix program that simulates the movement of stars. It
starts by putting a bunch of stars on the screen, and then it lets the
forces move the stars around. The result is a lot of neat wandering
paths, as the stars interact and collide.
Figuring out what paths these stars should take is called the
"N-Body Problem", and when there are more than 3 stars involved (N>3),
this can be a very hard
problem to solve. XStar is just a "toy" N-body solver, but it
generates a lot of pretty pictures and gives you an idea of how stars
interact. "Real" N-body solvers
have to work with many thousands, or even millions of stars, while
XStar works with dozens.
Along with the program, there is a fairly large document that
explains the N-Body problem in a fair amount of detail. It doesn't get
into the gory details of the
"real" N-body solvers, but it does give you an overview of the
techniques they use.
All comments, bug reports, bug fixes, enhancements, etc are
Send them to me at email@example.com.
This program is really a heavily modified version of XGrav, which
written by David Flater (firstname.lastname@example.org) and posted to
alt.sources on 1/21/95. I liked the program enough that I was
interested in it, but I didn't like it enough to leave it alone.
idea was Dave's, but I don't think too much of his code has been
unchanged. There is probably more untouched code from XSwarm, which
Dave used to implement the X port of his n-body problem solving