FunWorlds/HOpenGL
                              Claus Reinke
                          -------------------
                                   -- 
               functional programming and virtual worlds
                http://www.cs.kent.ac.uk/~cr3/FunWorlds/

This is a snapshot of my FunWorlds/HOpenGL prototype sources, as of July
2003, now (July 2004..) updated to work with ghc-6.2.1 and the new
HOpenGL included with it.  The functionality is unchanged since February
(just some dead or too experimental branches removed, and a minimal
update to get things working with HOpenGL-1.04). This is an undocumented
snapshot - only for curious adventurers;-) For general ideas, see the
project page and the draft paper and slides from IFL'2002.

Please let me know about suggestions, problems, etc. Comments on the
language design (not yet finalized) are especially welcome, because that
is what is different about FunWorlds, but experience reports or your
list of priorities regarding as yet missing graphics functionality will
be read with interest as well (graphics functionality is barebones even
compared to my earlier VRML-based FunWorlds prototypes, because it is
relatively clear what to do there and how, so the research focus has
been on other things). General contributions to HOpenGL are also
welcome, as they would carry over to FunWorlds/HOpenGL (are there any
portable sound APIs? font support via a FTGL binding would be very nice;
..).

You'll need ghc and HOpenGL installed (I wouldn't call it testing, but
I've tried the included examples on my notebook: win98+cygwin,
ghc-6.2.1 with included packages OpenGL and GLUT). The snapshot contains
a single small directory tree:

  $ ls -R funworlds-July2004/
  funworlds-July2004/:
  README  current  examples

  funworlds-July2004/current:
  Behavior.hs  FunWorlds.hs  Scene.hs

  funworlds-July2004/examples:
  Boids.hs         Cube.hs    Juggle2.hs  NLift.hs   Towers2.hs  obj
  BouncingBall.hs  Flock.hs   Lift.hs     Planet.hs  Tree.hs
  Chain.hs         Juggle.hs  Makefile    Towers.hs  hidir

  funworlds-July2004/examples/hidir:

  funworlds-July2004/examples/obj:

No docs yet:-(, several small examples:-) and the minimal modules (only
3:-) needed to compile the examples. Assuming unixy tools (e.g.,
cygwin), you can simply go into the examples directory and type make to
compile all examples. Many of them use a simple keyboard interface for
rotation and scaling (try xX/yY/zZ for rotation in either direction
around those axes, sS for scaling down or up, R to reset the view, <esc>
to end the demo). Some may have other or additional controls (numbers
0-4 for the lift, u/d for the tree), there isn't much variation or size
yet, and some examples are downright boring (Planet.hs is only there for
comparison with its equivalent in the HOpenGL redbook_HS examples).

As usual: no warranty for nothing, have fun if you dare!-)