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Activity Forums Adobe After Effects Expression needed to make y value of a null object progressively increase

  • Expression needed to make y value of a null object progressively increase

    Posted by Jacob Giacometti on March 26, 2022 at 10:48 pm

    Bonjour,

    This seems so simple that I hope I’m not going to get banned for asking it, but I’ve seriously been searching for 40 minutes !

    I’d just like to do the end credits of my film using an expression, pulling a null object up (the one all the parts of the credits are attached to), on the y axis, at a customisable speed.

    That’s all. Is there an expression for that ?

    Merci 🙏🏻

    Jacob Giacometti replied 4 years, 1 month ago 2 Members · 3 Replies
  • 3 Replies
  • Jacob Giacometti

    March 26, 2022 at 10:54 pm

    Let me clarify that I have come across the expression time*-100 to make it scroll up on the y axis. However this put the null object completely out of the screen and I’m not able to define its normal starting point. 😳 Because Y value is now under control of the expression.

  • Filip Vandueren

    March 27, 2022 at 12:23 pm

    I’m not sure I follow, but how can you have it both ways ? Either the Null moves at a customisable speed, and that will take it off screen sooner or later, or it doesn’t move…

    Or maybe it could be as simple as:

    value+ [0, time * -100];

    which means you can still reposition the Null (also when it’s offscreen by scrubbing the value in the timeline), and it moves up at 100px/s

  • Jacob Giacometti

    March 27, 2022 at 3:00 pm

    Hey ! Yessss that is exactly what I meant !

    I don’t mind the null going off screen, I just needed to be able to position its starting point, which wasn’t possible with just time*-100, start point would be fixed somewhere.

    Your expression solved exactly what I needed, thank you so much. 🙏🏻

    Let me go follow your youtube channel or some account with your work to thank you, if you have any !

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