From: Rachel Max <rachelmax@mac.com>
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Subject: [AE] distribute layers in Z space - but keep     "relative " positions
Date: Thu, 23 Jan 2014 16:00:59 -0800
References: <0089DBB3-F345-4EC9-8CF3-D0AC1DC8A934@me.com>
To: AE-List@media-motion.tv
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THANK YOU ALL AGAIN!

I love this list.

=E2=9D=A4

- Rachel


On Jan 23, 2014, at 3:53 PM, Chris Zwar <chris@chriszwar.com> wrote:

> Here's the expression I use - apply to a 3D layer's scale value, =
assuming your 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 //
>=20
> d=3Dlength(campos,lpos); // distance from layer to camera //
>=20
> xscl=3Dlscl[0];yscl=3Dlscl[1];zscl=3Dlscl[2];
> x=3D(d/zoom)*xscl;
> y=3D(d/zoom)*yscl;
> z=3D(d/zoom)*zscl;
>=20
> [x,y,z]
>=20
>=20
> Basically, the camera's lens is measured in pixels and called "zoom".  =
A layer will appear 100% of it's size (i.e. normal) when its distance =
from the camera is the same as the "zoom" value.
>=20
> That expression calculates the distance in world space, so not =
affected by parenting, and takes into account the scale values already =
applied to the layer.
>=20
> -Chris
>=20
> -----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 trick to affect the Z of a layer, but have it appear as if it =
hasn=E2=80=99t moved by scaling it and changing it=E2=80=99s position?
>=20
> I=E2=80=99ve been eyeballing it but that has to be an easier way or =
some math I can do.
>=20
> Thanks,
> Rachel
>=20
>=20
>=20
>=20
> +---End of message---+
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