[sdl_omap.git] / docs / html / guidetimeexamples.html

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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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e14743d1	1	<HTML
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	4	>Time Examples</TITLE
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71	><DIV
72	CLASS="SECT1"
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74	CLASS="SECT1"
75	><A
76	NAME="GUIDETIMEEXAMPLES"
77	></A
78	>Time Examples</H1
79	><P
80	></P
81	><DIV
82	CLASS="SECT2"
83	><H2
84	CLASS="SECT2"
85	><A
86	NAME="AEN412"
87	></A
88	>Time based game loop</H2
89	><P
90	><PRE
91	CLASS="PROGRAMLISTING"
92	>#define TICK_INTERVAL 30
93
94	static Uint32 next_time;
95
96	Uint32 time_left(void)
97	{
98	Uint32 now;
99
100	now = SDL_GetTicks();
101	if(next_time <= now)
102	return 0;
103	else
104	return next_time - now;
105	}
106
107
108	/* main game loop */
109
110	next_time = SDL_GetTicks() + TICK_INTERVAL;
111	while ( game_running ) {
112	update_game_state();
113	SDL_Delay(time_left());
114	next_time += TICK_INTERVAL;
115	} </PRE
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