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Forums Adobe After Effects Expressions expression blues – i need some tutorials or idiot guides step by step

  • expression blues – i need some tutorials or idiot guides step by step

  • graham smith

    October 29, 2009 at 12:51 pm

    hi im having some seriously annoying learning curves with expressions

    i have found an expression for something that i think i will be able to apply to an animation.

    the animation is done (easy)

    but im just ot gettign expressions at all, ive wasted numerous days just getting messages and sometimes throwing things around my flat, its that annoying im almost at the point of giving up but thats not the way
    i am.

    i need some blow by blow tutorial advice to make this work i think.

    i understand the way it works the name in the expression for comp / layer / etc.

    here is the problem.

    im trying to create something where an arm is connected to a body (simple parenting) but what id
    like to do is move that little sucker around in 3d space and have his arms wave around, not randomly
    but id like to have the arms moving as the body does (as if they are just loose and following the movement
    of the body) but id like to apply a delay so if the body suddenly goes left then darts right, the arms follow
    the body the same kind of way but 2 – 3 frames later (or before) or what ever value i decide.

    a script____
    i have this that i found on the internet (below) i think its form Dan Ebberts

    i copy and paste it in and obviously i get a error because some bits of the script are not right.
    the bits i need to change for my comp / layer settings are not right at all, and as much as i try
    to link and name things relevant im not getting anything that works.

    ive looked all over the internet for expression tutorials, it pretty crazy stuff and i have not found any tutorials for scripting
    i think i need something that spells it out for me, i mean ive got examples from many sites including this clever guy Dan Ebberts.

    i just dont know what to replace and work out how to adjust it, im not actually sure if this script is what i need, i think it is
    as in the second line it mentions a reference to the layer its takign the info from, is that correct?

    someone pls help me ive got some cool ideas but im just stuck in keyframe land at the moment.
    if anyone is in london, id really like to hear from you and maybe i could get some tips and advice or sometihng,
    this is seriously stumping my creativity 🙁 not good

    pls pls

    delay = 5; //number of frames to delay

    d = delay*thisComp.frameDuration*(index - 1);
    thisComp.layer(1).transform.xRotation.valueAtTime(time - d)

  • John Cuevas

    October 29, 2009 at 2:50 pm

    After reading/viewing many of the tutorials on this website(and really having trouble doing anything beyond simple) I moved on to this: After Effects Expressions===

    Great book, really will help you move on from simple to complex and the thought process on creating them. And Mr. Ebberts helped the author write it, so it’s got that going for it.

    Johnny Cuevas, Editor

  • graham smith

    October 29, 2009 at 2:53 pm

    i will look out for it, thanks

    life is breathtaking!

  • Todd Kopriva

    October 29, 2009 at 3:43 pm

    I suggest starting with the “Expression basics” section of After Effects Help and the resources that it points to.

    As with any programming language, the best way to learn is often to use, dissect, and tweak examples. The “Expression examples” section includes many examples and links to many more. You’ll also find many examples linked to in context from the respective sections of the “Expression language reference” section.

    Todd Kopriva, Adobe Systems Incorporated
    putting the ‘T’ back in ‘RTFM’ : After Effects Help on the Web
    If a page of After Effects Help answers your question, please consider rating it. If you have a tip, technique, or link to share—or if there is something that you’d like to see added or improved—please leave a comment.

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