[Haskell-cafe] Terminating GLUT/GLFW programs

[Peter Verswyvelen]

Indeed, the sample from the website does not close correctly when the window
is closed; you must press the escape key.

This problem has nothing to do with GLFW or the Haskell wrapper, but with
the demo, which does not check if the window gets closed.

I modified the example code on the wiki so it also exits when the window is
closed (the original author might want to check my hack, it's not really
clean).

Of course this is all rather horrible imperative code :) For nicer
alternatives, look at Yampa (the Space Invaders game or the Frag 3D
shooter), or Reactive (which I don't understand yet ;-) and other functional
reactive programming approaches .

> -----Original Message-----
> From: hjgtuyl at chello.nl [mailto:hjgtuyl at chello.nl]
> Sent: dinsdag 25 maart 2008 0:45
> To: bf3 at telenet.be
> Cc: haskell-cafe at haskell.org
> Subject: Re: [Haskell-cafe] Terminating GLUT/GLFW programs
> 
> 
> Thanks for the info, but it doesn't solve my problem; I adjusted the
> path,
> reinstalled GLFW and recompiled the program, but it still does not
> terminate.
> 
> Henk-Jan
> 
> 
> On Mon, 24 Mar 2008 08:58:05 +0100, Peter Verswyvelen <bf3 at telenet.be>
> wrote:
> 
> > Hi,
> >
> > I had a similar (unsolved) problem with GLUT but on my system
> (Windows
> > XP + GHC 6.8.2)  GLFW works fine, exiting is no problem at all.
> >
> > But when building GLFW, make sure that the GHC gcc-lib directory
> comes
> > *before* the MinGW/Cygwin directory in your PATH environment
> variable,
> > since when linking, the LD.EXE bundled with GHC *must* be used.
> >
> > Cheers,
> > Peter
> >
> > hjgtuyl at chello.nl wrote:
> >>
> >> L.S.,
> >>
> >> I am trying GLUT and GLFW (on Windows XP, with GHC 6.8.2); the
> sample
> >> programs do not terminate when I close the window by clicking on the
> >> cross in the upper right corner of the window.
> >>
> >> The sample program for GLUT is at
> >>
> >> http://blog.mikael.johanssons.org/archive/2006/09/opengl-
> programming-in-haskell-a-tutorial-part-1/
> >> the GLFW program:
> >>   http://haskell.org/haskellwiki/GLFW
> >>
> >> I tried in the GLUT program:
> >>   close = exitWith ExitSuccess
> >>
> >>   closeCallback $= Just close     -- => User error (unknown GLUT
> call
> >> getCloseFunc, check for freeglut)
> >>
> >> this needs freeglut (not documented); I downloaded freeglut.dll and
> >> placed it in the windows\system32 directory. The error message
> remained.
> >>
> >> What is needed to let these programs terminate properly?
> >>
> 
> 
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