GLGlobe
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                   Copyright (C) 2001 Florian Berger
                   
                email: florian.berger@jk.uni-linz.ac.at
                       harpin_floh@yahoo.de
                

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License Version 2 as
    published by the Free Software Foundation;

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.


What is GLGLobe ?
-----------------

   GLGlobe is an OpenGL - globe simulation for Linux. It was inspired by
   XGlobe or XEarth and actually it can use the marker-files of these programs.
   The Mapfile is still hardcoded, but it will be specify-able in the command
   line in future.
   
   It is still very alpha and may not even compile on your machine without
   hacking the source code or the makefile.
   You need to have GLU and GLUT installed on your system.
   furthermore libjpeg and linpng are needed for the mapfiles.
   
   Yet, the following features are implemented:
    - rotation of the globe by mouse or cursor keys
    - zooming with vertical mouse movement and right button held
    - time fwd/rew with horizontal mouse movement and right button held
    - time resetting with pressing <0>
    - zooming by pressing <+>/<->
    - <g> for dis/enabling grid
    - <d> for dis/enabling day/night-line
    - <m> for dis/enabling markers
    - <t> for switching bitmap/stroke fonts for markers
    - <ESC> for exit
    - menu with the middle mouse key (if the mesa lib supports it)
    - slow rotate - hold left mousebutton and CTRL-key
    - some commandline options similar to xearth or xglobe
      (grid, mapfile, markersfile,...)
    - most maps for xglobe should be useable (jpg or png)
      (jpg loader code is lent from Hari Nair's xplanet).
    - xglobe - marker files specifyable on commandline
    
   Known bugs:
    - something is wrong with the bitmap-font writing from glut and the 
      depth buffer (at least on my system XFree-4.0 with glide_dri)
    - actually I don't know how the daylight saving is implemented in linux
      so I don't know if everything is coded right in this sense (I assumed
      the time delivered by time() is the local time on thesystem including
      daylight saving)
   
   BUILDING:
    there is no "make install"
    simply type "make clean" and "make",
    and run the program from the source directory.