Re: [Mesa3d-users] problem writing a mesa/X11 game

[Brian P. <br...@pr...>]

Dave Morse wrote:
> 
> Dave Morse writes:
>  > I'm experiencing some bad behavior in a game I'm writing.
>  >
>  > My problem is that if Mesa draws my scene faster than 30 Hertz then I
>  > never get any x events.  So as far as my client can tell, the mouse never
>  > moves again.
>  >
>  > All other applications recieve X events normally.
>  >
>  > If I comment out the Mesa drawing code, then I get X events normally.
>  >
>  > During the locked times, top reports that X is consuming 90% cpu time.
>  >
>  > My machines are K6/450 and PII/333 running software mesa 3.3 beta.
>  >
>  > Can someone explain why X is so studiously ignoring the event sending half
>  > of its job, in favor of the rendering half?
>  >
>  > Any ideas for a solution?
> 
> I should also mention that this is a second pass at implementing the
> game.  The first pass was single-player, no network code, its main loop
> looked like:
> 
> while (1) {
>   check_x_events();
>   update_game_state();
>   draw_window();
> }
> 
> The new version has a client and a server communicating through udp
> packets, and the client loop looks like:
> 
> while (1) {
>   select( ...X_Windows, UDP... ) /* block for any input */
>   if (FD_ISSET( X_Windows ))
>     {
>       check_x_events();
>       send_mouse_position_to_server();
>     }
>   if (FD_ISSET( UDP ));
>     {
>       read_game_state();
>       draw_window();
>     }
> }
> 
> The simpler prototype loop had no problems getting X events.


I have no idea what check_x_events() is doing, but I think that
should probably consume all pending events, not just one at a time.

-Brian