Subject: Re: [AE] distribute layers in Z space - but keep     "relative " positions
References: <list-5356068@media-motion.tv>
From: Rob Birnholz <absolutemotion@birnholz.com>
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Date: Thu, 23 Jan 2014 21:20:54 -0500
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Sender:  Rob Birnholz <absolutemotion@birnholz.com>

This is great-- thanks Chris

Rob Birnholz
Absolute Motion Graphics, Inc.=20
Longwood, Florida
www.absolutemotiongraphics.com

(sent from a mobile device)

On Jan 23, 2014, at 6:53 PM, "Chris Zwar" <chris@chriszwar.com> wrote:

> Here's the expression I use - apply to a 3D layer's scale value, assuming y=
our camera is called "Camera 1"
>=20
> campos=3DthisComp.layer("Camera 1").toWorld([0,0,0]); // camera position /=
/
> zoom=3DthisComp.layer("Camera 1").cameraOption.zoom; // camera zoom //
> lpos=3DthisLayer.toWorld(thisLayer.anchorPoint); // layer position //
> lscl=3DthisLayer.transform.scale; // layer scale //
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> d=3Dlength(campos,lpos); // distance from layer to camera //
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> xscl=3Dlscl[0];yscl=3Dlscl[1];zscl=3Dlscl[2];
> x=3D(d/zoom)*xscl;
> y=3D(d/zoom)*yscl;
> z=3D(d/zoom)*zscl;
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> [x,y,z]
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> Basically, the camera's lens is measured in pixels and called "zoom".  A l=
ayer will appear 100% of it's size (i.e. normal) when its distance from the c=
amera is the same as the "zoom" value.
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> That expression calculates the distance in world space, so not affected by=
 parenting, and takes into account the scale values already applied to the l=
ayer.
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> -Chris
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> -----Original Message-----
> From: Rachel Max [mailto:rachelmax@mac.com]
> Sent: Friday, January 24, 2014 10:16 AM
> To: 'After Effects Mail List'
> Subject: [AE] distribute layers in Z space - but keep &quot;relative&quot;=
 positions
>=20
> Hi again, in the vein of the anamorphic illusions - is there a script or t=
rick to affect the Z of a layer, but have it appear as if it hasn=E2=80=99t m=
oved by scaling it and changing it=E2=80=99s position?
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> I=E2=80=99ve been eyeballing it but that has to be an easier way or some m=
ath I can do.
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> Thanks,
> Rachel
>=20
>=20
>=20
>=20
> +---End of message---+
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