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Thread: Efficient way to plot fast forward in replay mode

  1. 31st March 2015, 16:23 #1
    vinothrajendran
    vinothrajendran is offline Novice
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    Default Efficient way to plot fast forward in replay mode

    I have a task to implement replay functionality with Qwtplot...I am able to plot start , stop , pause....but with fast forward option, my curve is not plotting fast... i believe my plotting code takes time to process ...... I use QDirectPainter for curve plotting....

    Is there any solution ......
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  2. 31st March 2015, 20:04 #2
    Uwe
    Uwe is offline Expert
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    Default Re: Efficient way to plot fast forward in replay mode

    Decouple the sample rate from the plot refresh rate. It is not necessary to have faster more updates, than what a human eye can accept. IMHO for a growing curve 10fps should be good enough.

    A different question is how to find the most performant update strategy. But this usually depends on the charactistics of your plot - something I don´t know.

    Uwe
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