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Date: Mon, 17 Sep 2012 17:28:30 -0700
Message-ID: <CANL=31EbL3vCjax3rA9NjdE8v0qB_LrCPVzffPgtWwK1D3H=7Q@mail.gmail.com>
Subject: Re: [AE] Calculating the size of a vector from camera view
From: Darby Edelen <dedelen@gmail.com>
To: After Effects Mail List <AE-List@media-motion.tv>
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Your expression works well for me. Do the "pops" seem to occur randomly?

On Mon, Sep 17, 2012 at 1:05 PM, Byron Nash <byronnash@gmail.com> wrote:

> I am trying to get the 2D size of a vector in 3D space. I need to know how
> many pixels wide in 2D a null is as it moves around the comp. This seems to
> do something, but it is finicky and gives inconsistent results. My
> keyframes in the Z position are smooth, but the resulting length has
> strange "pops" in the value.
>
> N = thisComp.layer("3D Null");
> length(N.toComp(N.anchorPoint), N.toComp(N.anchorPoint+50))
>
>
>

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Your expression works well for me. Do the &quot;pops&quot; seem to occur ra=
ndomly?<br>
<br><div class=3D"gmail_quote">On Mon, Sep 17, 2012 at 1:05 PM, Byron Nash =
<span dir=3D"ltr">&lt;<a href=3D"mailto:byronnash@gmail.com" target=3D"_bla=
nk">byronnash@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail=
_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:=
1ex">

I am trying to get the 2D size of a vector in 3D space. I need to know how =
many pixels wide in 2D a null is as it moves around the comp. This seems to=
 do something, but it is finicky and gives inconsistent results. My keyfram=
es in the Z position are smooth, but the resulting length has strange &quot=
;pops&quot; in the value.=A0<br>



<div><br></div><div><div>N =3D thisComp.layer(&quot;3D Null&quot;);</div><d=
iv>length(N.toComp(N.anchorPoint), N.toComp(N.anchorPoint+50))</div></div><=
div><br></div><div><br></div>
</blockquote></div><br>

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