From: "Byron Nash" Received: from mail-qg0-f46.google.com ([209.85.192.46] verified) by media-motion.tv (CommuniGate Pro SMTP 6.1.0) with ESMTPS id 5797662 for AE-List@media-motion.tv; Fri, 24 Jul 2015 01:59:32 +0200 Received: by qgii95 with SMTP id i95so4034147qgi.2 for ; Thu, 23 Jul 2015 17:04:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type; bh=jEMGqw+QsANggRX1uCRK2tNGIAGGRIJCxO+ipE0yi18=; b=qP87OC26UbZNCDpTiraTE5QqzOjkOqMYVPrfhwZCO1i0Z9uW+WkoTtEkXw/dKjjcwK toPD5BK3Lw/ml7YIBY4aaWXiP6T7+NFAPWoVHIzGM9FWGvzn1TVaWQ4iSEFxo4heB+7Y oZQ90Gu9+uPg7sq0/c9fmYlxeXe9gWo2scZvOYlvTsTdKM9B3Mn2ffq1Z9UI8cwzZf8W UGAUbE/9SoeQUCrqNQHOE4AmYdY7JxUqU3m6xQSzDzU+DsJGWglWwwnC/5iuIvYGusNW GtL0BnlVtu08bejTgtmCODUOKgAIw3ZWmuXYcfd3L+fH1mnLWcX0lJBbhZg1bjYPixqk td0Q== X-Received: by 10.55.52.71 with SMTP id b68mr15865806qka.66.1437696281016; Thu, 23 Jul 2015 17:04:41 -0700 (PDT) MIME-Version: 1.0 Received: by 10.140.92.245 with HTTP; Thu, 23 Jul 2015 17:04:21 -0700 (PDT) In-Reply-To: References: Date: Thu, 23 Jul 2015 20:04:21 -0400 Message-ID: Subject: Re: [AE] 3 points to establish a plane To: After Effects Mail List Content-Type: multipart/alternative; boundary=001a1146c7721fff83051b93c022 --001a1146c7721fff83051b93c022 Content-Type: text/plain; charset=UTF-8 Perfect! I was trying to look up the equations but couldn't get it right. Thanks! On Thu, Jul 23, 2015 at 7:30 PM, Walter Soyka wrote: > I keep meaning to add this to my 3d-layer-tools script, but I posted the > expressions to do this here: > > https://forums.creativecow.net/thread/2/1053700 > > You may need to translate to world space or vectors depending on what > parenting you have going on, but that should get you started. > > w. > On Jul 23, 2015 6:27 PM, "Byron Nash" wrote: > >> What's the math to determine a plane based on three nulls in 3D space? >> I'd like to replicate the functionality of the built in tracker and be able >> to select three nulls and get a layer that sits on that plane in space. I >> figure it can be done with expressions and the pointAt() function but I'm >> not sure how to get the 3rd dimension. >> >> Thanks >> Byron >> > --001a1146c7721fff83051b93c022 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Perfect! I was trying to look up the equations but couldn&= #39;t get it right. Thanks!

On Thu, Jul 23, 2015 at 7:30 PM, Walter Soyka <AE-L= ist@media-motion.tv> wrote:

I keep meaning to add this to my 3d-layer-tools script, but= I posted the expressions to do this here:

https://forums.creativecow.net/thread/2/1053700

You may need to translate to world space or vectors dependin= g on what parenting you have going on, but that should get you started.
=

w.

On Jul 23, 2015 6:27 PM, "Byron Nash" = <AE-List@me= dia-motion.tv> wrote:
What's the math to determine a plane based on= three nulls in 3D space? I'd like to replicate the functionality of th= e built in tracker and be able to select three nulls and get a layer that s= its on that plane in space. I figure it can be done with expressions and th= e pointAt() function but I'm not sure how to get the 3rd dimension.
Thanks
Byron

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