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data from nested compositions with Expressions
Hi everyone
I’ve got a 3d comp with a camera and a scene
it’s a street and I’ve got a poster on one of the walls
the comp is huge and I’ve scaled it down to fit a PAL size comp
i want to put a corner pin effect (or 4 expression point controls) on a solid that represents the poster on the wall
and i need to be able to link that data to a 2d layer outside the 3d scene so i can bake that data into keyframes and export it.i know it must have something do to with the fromComp/toComp expression
but i just can’t seem to figure it out…any ideas would be much appreciated
thanks in advance
Ariel -
2 Replies
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You’re using the 3D scene as a 2D layer in the Pal comp, right ?
First off, in the 3D-scene on your 3D-layer “wall” create 4 Point-selectors to locate the 4 corners of the poster.
Rename the point-controls to “C1” – “C4”In your Pal Comp the syntax to get the position of C1 will be:
precomp=thisComp.layer("3D scene").source;
wallLayer=precomp.layer("wall");// 2D position inside the ful res precomp:
C1_fulres=wallLayer.toComp(wallLayer.effect("C1")("Point"));// 2D position in this comp:
C1_pal=thisComp.layer("3D scene").toComp(C1_fulres);// 2D position on this layer:
fromComp(C1_pal);
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Thanks so much
I’ll give it a try ASAPAriel
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