MIME-Version: 1.0
From: Byron Nash <byronnash@gmail.com>
Date: Mon, 17 Sep 2012 16:05:09 -0400
Message-ID: <CANGV+5qdHYsNQ_0W4y7z26ot+-Bbs4mvvyK0A1rpwo2TPsL2sw@mail.gmail.com>
Subject: Calculating the size of a vector from camera view
To: After Effects Mail List <AE-List@media-motion.tv>
Content-Type: multipart/alternative; boundary=e89a8fb1f96e99b44904c9eb4b07

--e89a8fb1f96e99b44904c9eb4b07
Content-Type: text/plain; charset=ISO-8859-1

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))

--e89a8fb1f96e99b44904c9eb4b07
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

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>

--e89a8fb1f96e99b44904c9eb4b07--