glgrav
				     ------

			An N-body gravity toy for OpenGL

			   Copyright 2003 Ian Cowburn


License
-------

glgrav comes with ABSOLUTELY NO WARRANTY; for details see LICENSE

This is free software, and you are welcome to redistribute it under certain
conditions.


Building
--------

AS this is such a small program, there is no configure script.  Simply edit
the makefile and follow the instructions at NOTE1, NOTE2 and NOTE3.  Then
just :

make

Which (all being well) should generate the glgrav executable.

Note that GCC V3.2 was used, and GCC is expected for building.  The makefile
only includes instructions for GNU/Linux or cygwin (for windows).  Any version
of Unix should be able to compile this too, and any platform that provides
OpenGL and GLU/GLUT shouldn't have too much trouble building it.


Usage
-----

glgrav [datafile]

If datafile is not passed, then a file called 'dat' is searched for in the
current directory.

The datafile defines the system to simulate in glgrav.  For instructions on
the commands available, read the supplied 'dat' file.

Once running using the right mouse button will bring up a fairly self
explanatory menu. 


Known Bugs
----------

For some reason under Windows the first few menu items don't work.  This could
be a bug in the GLU/GLUT code in Windows.  Or alternatively my bad coding.

I've tried to organise the menus so that it shouldn't matter too much (the
missing choices can easily be changed in the datafile).


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$Id: README,v 1.1.1.1 2006-05-02 19:12:46 ianc Exp $