Re: [Caml-list] SDL2 bindings, testers and feedback welcome

[Anthony Tavener <anthony.tavener@gmail.com>]

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On Tue, Dec 17, 2013 at 11:54 PM, Erkki Seppala <flux@modeemi.cs.tut.fi>wrote:

>
> Well, I think that it may be a bit unrealistic to expect this kind of
> fork to get very popular. I think in most common SDL use cases people
> just don't care much about errors :(. (Ie. games: either work or they
> don't.)
>

I care about errors, but in practice the only functions I use which have
errors
of concern are during initialization. Once system resources are acquired,
I'm
mostly reading events and swapping buffers.

I'm translating a smaller project (mostly works, but for some reason my
controller
is not detected, so far -- works with sdlcaml/SDL1.2). Admittedly, dealing
with
`Error | `Ok was a bit annoying. A lot of functions I really don't care
much (getting
device names), so an abstraction which assigns on `Ok, or defaults on
`Error is
fine.

Something I'm not so keen on is that event types and event values aren't
constants I can pattern match on, so I have a lot of "| t when t = "...

  method process_event ev =
    match Sdl.Event.(get ev typ) with
    | t when t = Sdl.Event.key_down ->
      begin match Sdl.Event.(get ev keyboard_scancode) with
        | t when t = Sdl.Scancode.s -> thrustp <- {thrustp with z = 1.};
true
        | t when t = Sdl.Scancode.w -> thrustn <- {thrustn with z = 1.};
true

These are matchable constants in sdlcaml. With Tsdl, the constants are
brought in
as let-bindings... looks like Daniel has something nifty to make this a lot
easier
but I haven't looked into it yet.


Summary of parts tested and working for me:
 -window with opengl context
 -event handling: mouse and keyboard
 -grabbing and hiding cursor, also release and show

Next is figuring out why my game controller isn't detected, and maybe
plugging in
a joystick and another kind of controller too. First, time for some sleep.
:)

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