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Date: Wed, 4 Mar 2009 15:38:22 +0200 From: "Mike Gorchak" Subject: Re: About QNX support in SDL 1.3 Here is another batch of patches. 1) Makefile.in - added SDL_opengles.h header as header to install. 2) configure.in - Added special define to detect Common Lite OpenGL ES library in case if Common library is not installed. Added check for clock_gettime in libc (in QNX it is in libc). 3) SDL_config.h.in - Added SDL_VIDEO_RENDER_OPENGL_ES and SDL_VIDEO_OPENGL_ES declarations for configure script autodetection. 4) SDL_opengles.h - Added GL_API definition if it is not defined. Added extension GL_OES_draw_texture because OpenGL ES Renderer uses it without declaration. Added GL_OES_vertex_buffer_object extension, which is supported under QNX OpenGL ES. Added GL_OES_single_precision extension. 5) To the test directory I've added building OpenGL ES test applications through the autotools suite. Was support for iPhone IDE building only.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 04 Mar 2009 15:10:47 +0000
parents 355632dca928
children
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<HTML
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>Time Examples</TITLE
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>Time Examples</H1
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>Time based game loop</H2
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>#define TICK_INTERVAL    30

static Uint32 next_time;

Uint32 time_left(void)
{
    Uint32 now;

    now = SDL_GetTicks();
    if(next_time &#60;= now)
        return 0;
    else
        return next_time - now;
}


/* main game loop */

    next_time = SDL_GetTicks() + TICK_INTERVAL;
    while ( game_running ) {
        update_game_state();
        SDL_Delay(time_left());
        next_time += TICK_INTERVAL;
    }&#13;</PRE
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