• Adobe After Effects Expressions

  Exporting Motion Path keyframe data

  Posted by Ken De cooman on November 9, 2008 at 8:54 pm

  I’m working on a project between dance, video and architecture. I’m using Trapcode particular to draw a path/curve that’s following someone in the video. To do this I use a light as an emitter and keyframe it’s position throughout the video.

  The result is a curve that AE/Particular draws according to my “Light” position keyframes.

  Here’s the question: how do I export the (x,y,z) data of position of the light each fifth frame, so that I have all those positions in an array as follow example:
  (630,7 , 287,3 , -355,6)
  (634,5 , 256,7 , -356,9)
  (637,8 , 245,4 , -358,7)
  …

  And so on.

  Can I do this using expressions?
  (I could do it manually, but it would be such a lot of work… Really.)
  If I have them in an array I can use them in Rhino to go 3D.
  I’m using adobe CS 3 on macbook pro.

  Thanks so much for every lead that I can get…

  Ken

  Dan Ebberts replied 17 years, 8 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Dan Ebberts

  November 9, 2008 at 11:43 pm

  You could do it with a script. Another possibility would be to add this expression:

  value

  And then convert the expression to keyframes (Animation > Keyframe Assistant > Convert Expression to Keyframes). Then just select the property, Edit > Copy, and paste into a spreadsheet or text editor. Then you just need to figure out how to thin the data.

  Dan

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