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Date: Fri, 21 Sep 2012 12:12:06 -0400
Message-ID: <CAKkmcE-vCFFHP0u6q-MtA6peNUmf8Ge3HEgxsUGhcABgnbP0wg@mail.gmail.com>
Subject: Re: [AE] Auto-Orient flipping/twisting
From: Bill Hinkson <bill.hinkson@gmail.com>
To: After Effects Mail List <AE-List@media-motion.tv>
Content-Type: multipart/alternative; boundary=0016e6dbe86456160304ca3880de

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Hey Byron,

I wonder if you're running into gimbal lock. I seem to remember having a
similar issue and reorienting with nulls.

On Fri, Sep 21, 2012 at 11:53 AM, Byron Nash <byronnash@gmail.com> wrote:

> I just tried this expression in place of the Auto-Orient and it is still
> flipping.
>
> lookAt(position, position.valueAtTime(time - thisComp.frameDuration))
>
>
>
>
> On Fri, Sep 21, 2012 at 11:45 AM, Byron Nash <byronnash@gmail.com> wrote:
>
>> I'm getting twisting on my Auto-Orient 3D layers. But I don't have an
>> expression on the position of the object. It's mostly happening when the
>> layer goes vertical. Anyone run into this?
>>
>> Byron
>>
>>
>>
>


-- 
bill hinkson
animator & designer
http://billhinksondesign.com

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Hey Byron,<br><br>I wonder if you&#39;re running into gimbal lock. I seem t=
o remember having a similar issue and reorienting with nulls.<br><br><div c=
lass=3D"gmail_quote">On Fri, Sep 21, 2012 at 11:53 AM, Byron Nash <span dir=
=3D"ltr">&lt;<a href=3D"mailto:byronnash@gmail.com" target=3D"_blank">byron=
nash@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">I just tried this expression in place of the=
 Auto-Orient and it is still flipping.=A0<div><font face=3D"courier new, mo=
nospace"><br>
</font></div><div><font face=3D"courier new, monospace">lookAt(position, po=
sition.valueAtTime(time - thisComp.frameDuration))</font><div class=3D"im">=
<br>

<br><br><br><div class=3D"gmail_quote">On Fri, Sep 21, 2012 at 11:45 AM, By=
ron Nash <span dir=3D"ltr">&lt;<a href=3D"mailto:byronnash@gmail.com" targe=
t=3D"_blank">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;padd=
ing-left:1ex">


<div><div>I&#39;m getting twisting on my Auto-Orient 3D layers. But I don&#=
39;t have an expression on the position of the object. It&#39;s mostly happ=
ening when the layer goes vertical. Anyone run into this?<div>

<br></div><div>Byron<br>

<div><br></div><div><br></div></div>
</div></div></blockquote></div><br></div></div>
</blockquote></div><br><br clear=3D"all"><div><br></div>-- <br>bill hinkson=
<br>animator &amp; designer<br><a href=3D"http://billhinksondesign.com">htt=
p://billhinksondesign.com</a><br>

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