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Custom animation classes?

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  • J Offline
    J Offline
    jsprenkle
    wrote on last edited by
    #1

    I'm interested in doing some sophisticated physics based animations of QML elements.
    I know I can perform the motion calculations to predict the path of the objects then use a PathAnimation object.
    This is fine unless I have to change the simulation during the animation.

    Can anyone offer any hints on how to write a custom animation class?
    If I implemented that I could incrementally calculate motion instead of having to predict / interrupt / predict.

    Thanks

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    • J Offline
      J Offline
      jsprenkle
      wrote on last edited by
      #2

      After a bit more review it appears the PathAnimation will not work. It animates the position of the item but can't be applied to any arbitrary property. (You can't use a path animation to control rotation).

      So it really looks like I have to implement a custom animation class to get what I want.

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      • X Offline
        X Offline
        Xander84
        wrote on last edited by
        #3

        Hi, you may be able to extend the classes QAbstractAnimation or QPropertyAnimation and use it in QML. I haven't tried that myself but it should work I guess, take a look at the code at "qtbase/src/corelib/animation":https://qt.gitorious.org/qt/qtbase/source/db14f5fd605904965402042d656c73fc65fb6615:src/corelib/animation

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        • J Offline
          J Offline
          jsprenkle
          wrote on last edited by
          #4

          Thank you Xander. Hopefully it's easier to understand/refactor than to just re-invent!

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