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Help => General => Topic started by: replicant on November 02, 2011, 10:34:05 am

Title: Window lag messing with data using timers
Post by: replicant on November 02, 2011, 10:34:05 am

When you select the window, hold it and drag it around, the application freezes. This is fine except for data which uses sf::Clock or GetFrameTime().

I have a background which moves stars across the screen using GetFrameTime(). Once they go off screen, The main loop moves them back to the starting side.

Looks like this normally.
(http://iforce.co.nz/i/pva0zyif.ssp.png)

However if you freeze the window, the timer still increases which results in them all instantly moving off screen and this ruins the background.

After freezing the window.
(http://iforce.co.nz/i/thdfjln0.t3u.png)

Is there anyway I can pause sf::Clock before freezing the application and then unpause upon unfreezing? or any other way around this? do I need to use threads?

SFML-2.0-512a7c6
Windows 7 64b
ATI Radeon HD 4850

Title: Window lag messing with data using timers
Post by: Laurent on November 02, 2011, 10:51:15 am

There are several solutions to this problem:
- use Thor (http://www.bromeon.ch/thor/) clocks, they can be paused
- never reset the position of the stars, apply a modulo only when you display them to make them fit in the window
- ignore huge frame times (> 1 sec)

Nice intro screen, by the way :)

Title: Window lag messing with data using timers
Post by: replicant on November 02, 2011, 11:45:07 am

Quote from: "Laurent"

There are several solutions to this problem:
- use Thor (http://www.bromeon.ch/thor/) clocks, they can be paused
- never reset the position of the stars, apply a modulo only when you display them to make them fit in the window
- ignore huge frame times (> 1 sec)

Nice intro screen, by the way :)

Thanks.  :)

Going to look into Thor and the second solution is interesting, I did think of the third but it seemed a bit hackish to me.