• Adobe After Effects Expressions

  Multiplane expression added manually does not work

  Posted by David Cabestany on March 18, 2014 at 9:49 pm

  I’m using this expression to create a multiplane expression on my comp:

  camZoom = 2666.6667; distance = position[2] + camZoom; scale * (distance / camZoom);

  When I add it using a script named PSDto3D that I found at motion graphics exchange the expression works fine, however when I revise it to

  camZoom = thisComp.layer(“Camera 1”).transform.position[2]*-1;
  distance = position[2] + camZoom;
  scale * (distance / camZoom);

  which is basically the same, the objects are displaced also in x and y as soon as I start dragging them in z space. The scale works fine according to the expression but there multiplane effect is not achieved, everything moves in a very obvious way.

  Can anybody tell me why the second variation doesn’t work?
  Thanks.

  camZoom = 2666.6667; distance = position[2] + camZoom; scale * (distance / camZoom);

  camZoom = thisComp.layer("Camera 1").transform.position[2]*-1;
distance = position[2] + camZoom;
scale * (distance / camZoom);


  David Cabestany replied 12 years, 5 months ago 2 Members · 4 Replies
• 4 Replies

• 

  Dan Ebberts

  March 19, 2014 at 12:19 am

  It seems to work fine as long as the layer’s anchor point is on the camera’s z axis. If you have it off-axis, I would think you would need a position expression as well, to keep the layer on the camera’s line of sight that passes through the anchor point.

  Dan
• 

  David Cabestany

  March 19, 2014 at 12:29 am

  Thanks Dan.

  You mean having the layer’s anchor point “aligned” to the camera’s z axis on its point of interest?
• 

  Dan Ebberts

  March 19, 2014 at 1:22 am

  Yes, so the layer’s anchor point will be in the center of the camera’s view.
• 

  David Cabestany

  March 19, 2014 at 3:10 pm

  Thanks a lot again

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