Re: [Caml-list] OpenGL and LWT

[Richard Neswold <rich.neswold@gmail.com>]

> On Mar 17, 2014, at 9:05 AM, Daniel Bünzli <daniel.buenzli@erratique.ch> wrote:
> 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.

The SDL libraries look much better to use. Thanks for the suggestion!

Sorry, though. I'm still not fully understanding how to interface the two. I see that, in SDL, I can call Tsdl.Sdl.wait_event to block and wait for events to get posted. But in what context should I call this function? In my LWT environment, this would block the entire application. Lwt.Async threads would also do that. I could use 'detach' to use an OS thread, but then I'm back to the same problem as libglut: a secondary thread needs to communicate with the main LWT environment which itself can't make SDL calls since the secondary thread "owns" the SDL context.

I could have an Lwt thread call Sdl.poll_event and then go to sleep if no events were available, but I'm trying to make this driven by events and not resort to polling, if possible.

I must be missing some detail in getting these libraries to work together trivially. Sorry for my misunderstanding.

--
Rich