[haiku-3rdparty-dev] Creating a fast (60 fps or so) periodic timer
- From: Joseph Adams <joeyadams3.14159@xxxxxxxxx>
- To: haiku-3rdparty-dev@xxxxxxxxxxxxx
- Date: Fri, 18 Sep 2009 01:48:46 +0000
I'm porting a game of mine to Haiku, and I'm trying to have it update
quickly (e.g. 60 times per second) so as to produce a smooth
framerate. On the game's original platform (Ecere SDK), I created a
Timer object that would fire a handler function every 0.015 seconds.
The closest analogue I have found to this is the Pulse() handler.
Unfortunately, its granularity isn't sufficient, producing roughly 10
frames per second. I also tried a BMessageRunner:
game_timer = new BMessageRunner(this, new BMessage(GAME_TIMER), 15000, -1);
but the framerate is still the same. Note that the CPU usage stays low.
Ways that come to mind for me are:
1. Using the Media kit and BTimeSource
2. Creating a thread with a for loop to send the periodic messages
3. Having the update handler recursively invoke itself
4. Using an Application kit feature I overlooked
How can I get my update handler to trigger faster than the Pulse()
cutoff point (preferably without hogging all the CPU power unless the
computer is too slow)? Thanks!
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