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Delta Time consistency

Discussion in '2020.2 Beta' started by hippocoder, Apr 16, 2020.

  1. hippocoder

    hippocoder

    Digital Ape

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    Could you please explain the DX11 deltaTime consistency bullet point? What does it mean and also what of Vulkan + DX12 + Other?

    Thanks :)
     
    hippocoder, Apr 16, 2020
    #1
    ROBYER1 and Peter77 like this.

  2. Tautvydas-Zilys

    Tautvydas-Zilys

    Unity Technologies

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    It's a direct follow up to this problem: https://forum.unity.com/threads/time-deltatime-not-constant-vsync-camerafollow-and-jitter.430339/

    Now when you run the player on DX11, Time.deltaTime will tell you the actual amount of time a frame has been on the screen, rather than the time difference between two points in our C++ codebase that executes on the CPU when VSync is enabled. This makes Time.deltaTime to not fluctuate unless your frame rate is missing vblanks.

    The fixes for this for other platforms/graphics APIs are coming too. I just can't tell you when :).
     
    Tautvydas-Zilys, Apr 16, 2020
    #2
    ROBYER1, Bastienre4, SugoiDev and 4 others like this.

  3. hippocoder

    hippocoder

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    Awesome, thanks!
     
    hippocoder, Apr 17, 2020
    #3

  4. Peter77

    Peter77

    QA Jesus

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    Is this considered a new feature of bug-fix? I'm asking, because I'm wondering if it gets back-ported to 2018.4 LTS and 2019 LTS.
     
    Peter77, Apr 17, 2020
    #4

  5. Tautvydas-Zilys

    Tautvydas-Zilys

    Unity Technologies

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    Tautvydas-Zilys, Apr 17, 2020
    #5
    Peter77 likes this.

  6. JoNax97

    JoNax97

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    I read the thread above, but just to be sure: Does this address the issue explained in this blog? If so, in what capacity?
     
    JoNax97, Apr 17, 2020
    #6

  7. Tautvydas-Zilys

    Tautvydas-Zilys

    Unity Technologies

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    I can't say it addresses it 100%, but it gets us 80-99% there depending on circumstances. I encourage you to give it a shot and try it out :).
     
    Tautvydas-Zilys, Apr 17, 2020
    #7
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  8. JoNax97

    JoNax97

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    Oh boy this is awesome. I've just finished reading the patch notes and the amount of fixes is huge. I will surely try the alpha as soon as I can.
    Thanks a lot!
     
    JoNax97, Apr 17, 2020
    #8

  9. rz_0lento

    rz_0lento

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    I'll just add a note here from that other thread that this feat hasn't landed on a7 yet. It should be on a8 whenever we get it though.
     
    rz_0lento, Apr 19, 2020
    #9
    Peter77 likes this.

  10. Enzi

    Enzi

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    A8 is out. Have you done any testing yet?
     
    Enzi, Apr 24, 2020
    #10

  11. hippocoder

    hippocoder

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    In the other thread, linked above, he posted charts. It doesn't matter if he did though, you want to do your own testing. Your situation isn't his.
     
    hippocoder, Apr 24, 2020
    #11