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Activity Forums Adobe After Effects 3d stroke expression for particle world. Attaching one null to another null.

  • 3d stroke expression for particle world. Attaching one null to another null.

    Posted by Richard Garabedain on December 1, 2014 at 11:46 pm

    Ive got it all set up properly. My particles are attached to a null in x,y and z space just fine. But i wanted to attach that null to another null and spin around it. Trying to make christmas tree effect.

    My problem is when i attach the particle control null to the roationtal null, my particles are now way off course. They still follow the null but are way off on position. I could have sworn ive done this before. But i cant get it to work now.

    Michael Szalapski replied 11 years, 5 months ago 2 Members · 2 Replies
  • 2 Replies
  • Richard Garabedain

    December 2, 2014 at 12:41 am

    I have not animated anything yet. Everything is the center of the comp.

  • Michael Szalapski

    December 2, 2014 at 5:02 pm

    If you’re trying to get something in AE to follow a layer, it’s no problem. However, if that layer then becomes parented to something else, you need to use the toWorld expression otherwise it’s looking at the parented values.

    The expression would look something like:
    L = thisComp.layer("Child Null");
    L.toWorld(L.anchorPoint)

    Where Child Null is the name of the layer you want the particles to follow. It’s easiest just to pickwhip that line after the = symbol.

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