Re: [Caml-list] OpenGL and LWT

["Daniel Bünzli" <daniel.buenzli@erratique.ch>]

Le lundi, 17 mars 2014 à 14:39, Rich Neswold a écrit :
> On Mon, Mar 17, 2014 at 5:32 AM, Ivan Gotovchits <ivg@ieee.org (mailto:ivg@ieee.org)> wrote:
> > Unfortunately, I don't know how LabGL is organized.
>  
> Most OpenGL bindings (including LabGL) include 'libglut', which is a
> library that is bundled with OpenGL that opens a UI window with an
> OpenGL context in it. It would be nice to use this library because it
> hides these details (i.e. the same code runs on Unix and MacOSX and
> Windows.) Unfortunately, the way libglut works is you call main_loop()
> which never returns. Before calling main_loop(), you register
> callbacks for mouse and keyboard events. You can also register a
> callback for periodic timeouts. Lastly, there's a callback which gets
> called whenever the libglut main loop is "idle" (with unspecified
> latencies, frequency, or guarantees.)

I wouldn't use glut which is no longer bundled on osx, is quite limited in functionality and reclaims your main loop. Use SDL, it provides similar functionality to setup an OpenGL context in a platform independent way but it doesn't reclaim control on your main() which will make integration with lwt trivial. There is:  

http://ocamlsdl.sourceforge.net/home.html

I also wrote newer and lower level bindings that target SDL2, they are not released yet but are becoming stable see:

https://sympa.inria.fr/sympa/arc/caml-list/2013-12/msg00105.html

(the heisenbug on osx mentioned in that message can be solved see [1]).  

Best,

Daniel

[1] http://lists.ocaml.org/pipermail/ctypes/2014-February/000066.html