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  74. >Time Examples</A
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  84. >Time based game loop</A
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  88. CLASS="PROGRAMLISTING"
  89. >#define TICK_INTERVAL    30
  90.  
  91. Uint32 TimeLeft(void)
  92. {
  93.     static Uint32 next_time = 0;
  94.     Uint32 now;
  95.  
  96.     now = SDL_GetTicks();
  97.     if ( next_time <= now ) {
  98.         next_time = now+TICK_INTERVAL;
  99.         return(0);
  100.     }
  101.     return(next_time-now);
  102. }
  103.  
  104.  
  105. /* main game loop
  106.  
  107.     while ( game_running ) {
  108.         UpdateGameState();
  109.         SDL_Delay(TimeLeft());
  110.     } </PRE
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