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positioning a video between 2 null objects

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Jonachan Chainy
positioning a video between 2 null objects
on Jan 29, 2017 at 12:32:20 am

it says it all right there ^^^ but here's some more details.

i needed lines to shoot around a tracked area, and found a video of this:





(not a link)

so, i tried it, and had some trouble because i need to do the same thing, but without the beam effect because i have my own mp4 file of an animated line.
how do i use tracking, null objects, and expressions do do this?

thanks for the quick response
(im still at an introduction level for expressions, so take it easy, but am experienced with everything else, like basic compositions, tracking, utilizing parenting, etc...)

-jon


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Dave LaRonde
Re: positioning a video between 2 null objects
on Jan 30, 2017 at 1:43:00 am

Do it and don't use the Beam effect. Pretty darn simple.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Emre Anil
Re: positioning a video between 2 null objects
on Jan 30, 2017 at 11:20:11 am

If you just need the center point of 2 Null Objects:


n1 = thisComp.layer("Null 1").transform.position;
n2 = thisComp.layer("Null 2").transform.position;
pX = (n1[0] + n2[0]) / 2;
pY = (n1[1] + n2[1]) / 2;
[pX, pY]


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Jonachan Chainy
Re: positioning a video between 2 null objects
on Jan 30, 2017 at 11:00:48 pm

that did the job, thanks.


-jon


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