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How to use animation curve in Flipbook player? Curve is ignored all the time

Discussion in 'Visual Effect Graph' started by sergiusz308, Feb 10, 2020.

  1. sergiusz308

    sergiusz308

    Joined:
    Aug 23, 2016
    Posts:
    198
    Hi there, so I have flipbook blend for output node and flipbook player for update node.

    If flipbook player set to constant frame rate - it works.

    If I pick a curve though - it always shows first frame, no matter what curve I create it always shows first frame.

    upload_2020-2-11_0-35-47.png

    In this example curve is descending, but it makes no difference

    upload_2020-2-11_0-37-20.png

    Whatever I put there - always first frame is displayed until particle dies.

    Thanks,
    S.
     
    sergiusz308, Feb 10, 2020
    #1

  2. ThomasVFX

    ThomasVFX

    Unity Technologies

    Joined:
    Jan 14, 2016
    Posts:
    45
    This seems pretty suspicious indeed. I haven't been able to reproduce your issue in the latest 7.2.0 package. If you can, could you file a bug to us using the bug reporter so we can investigate on your file?

    Thank you
     
    ThomasVFX, Feb 12, 2020
    #2

  3. sergiusz308

    sergiusz308

    Joined:
    Aug 23, 2016
    Posts:
    198
    @ThomasVFX I'll try to reproduce it with 7.2.0 and will update here - thanks for replying!
     
    sergiusz308, Feb 13, 2020
    #3

  4. VladVNeykov

    VladVNeykov

    Unity Technologies

    Joined:
    Sep 16, 2016
    Posts:
    550
    Hi @sergiusz308 ,
    Is the curve set to a range of 0 to 1? If so, based on your screenshot, the flipbook size is 2x2, so the curve should probably go from 0 to 4 to get all the frames.

     

    Attached Files:

    VladVNeykov, Feb 24, 2020
    #4

  5. McDev02

    McDev02

    Joined:
    Nov 22, 2010
    Posts:
    661
    I can confirm that! My 6x6 sheet I had to set the last point to (1, 36).
    Although there is an issue, when I for example change the first point to (0,24) It will still start with frame 1 but starts to loop at the end. So t = 1 will not be Frame 36, but 23 potentially, while t=0 it uses frame 0.

    Also when you set (0,36) and (1,0) you get ta rather better result than when using (0,0) and (1,36). I don't get how this functions...
     
    Last edited: Mar 20, 2020
    McDev02, Mar 20, 2020
    #5

  6. JulienF_Unity

    JulienF_Unity

    Unity Technologies

    Joined:
    Dec 17, 2015
    Posts:
    306
    The curve in the flipbook player does not specify the frame index but the frame rate at a given time.

    If you want to specify the frame index from particle life time you need to use a Set TexIndex From Curve block instead. Basically manipulating texIndex attribute directly which specifies the current frames to use
     
    JulienF_Unity, Mar 20, 2020
    #6
    FlightOfOne likes this.