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Windows and Linux timing differences |  |
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Justin Agrell
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Source can be found:
https://github.com/quadcricket/legend-of-pandora/blob/master/source/common/source/main.c I've been trying to wrap up my old open source game to move on to my SDL2 project. I just got it working on Windows 7 and I've noticed the timing is noticeably off. Characters animate incorrectly, or move too slowly on Windows. I thought I implemented time-based movement correctly but it's likely I'm missing something simple. I use SDL_GetTicks() to record the length of each run cycle and then moving characters so many pixels (or changing key-frames) whenever so many milliseconds pass. Is there an adjustment I need to make to SDL? Do I just need to adjust my definitions for Windows? Is my code just wrong? Any help would be appreciated. -Justin _______________________________________________ SDL mailing list http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org |
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Windows and Linux timing differences | |
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Ryan C. Gordon
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If you're on SDL 2.0.3, there's a bug we fixed since: https://hg.libsdl.org/SDL/rev/7454bfce9202 Basically, we usually didn't use the high-resolution timer on Windows by accident, so simple timing scenarios where you should have had a 1ms resolution were out of whack by an order of magnitude. --ryan. _______________________________________________ SDL mailing list http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org |
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Windows and Linux timing differences | |
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Sik
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The amusing thing:
2015-12-01 2:44 GMT-03:00, Ryan C. Gordon:
"An existing hint lets apps that don't need the timer resolution changed avoid this, to save battery, etc, but this fixes several problems in timing, audio callbacks not firing fast enough, etc." With games (the most common use for SDL, I believe?) the battery saving issue is the exact opposite because the high resolution timer allows them to enter a sleep loop without risking a framerate drop (otherwise they have to resort to busy loops or the like which pushes their CPU usage to 100%). _______________________________________________ SDL mailing list http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org |
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