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Forums Adobe After Effects Expressions Link position, rotation and scale of null to point x,y of effect param

  • Link position, rotation and scale of null to point x,y of effect param

  • Anmol Mishra

    October 30, 2021 at 12:49 pm

    I have an an effect that has an entry for Source – which is a point x,y param. The layer has been tracked and the motion applied to null object “Null 1”

    I have keyframes on Position, rotation, scale for “Null 1”

    What expression will capture the transform for Position, Rotation, Scale and apply it to the x,y co-ordinates of the Source – point parameter ?

  • Meng Zhiqun

    October 30, 2021 at 3:35 pm

    Besides the parent pickwhip method, if you open the dropdown for each of the transform properties, like position, you can see that each property has its own pickwhip, just like on the layer.
    pickwhip.jpgexpand image

    To link properties easily, you can click drag this pick whip to another property of another layer. Take note that this is not the parent pickwhip, but the pickwhip of the property itself.link.jpgexpand image

    After that, you can see that an expression will be generated. This is how to “parent” properties, instead of the layers itself. Hope this helps!expression.jpgexpand image

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