• Adobe After Effects Expressions

  Trim Path end value controlled by camera Z

  Posted by Peter Zeet on October 5, 2012 at 12:21 am

  Hi!
  the question….
  …first, the elements I have (there are some more elements, but not important here):
  1.cam
  2.null to control the cam
  3.shape layer with a curvy path (like a long long road), and Trim Paths set both Start and End to 0.

  At certain point, the camera flies to the infinite Z, and I want the Trim Path`s End value goes from 0 to a value controled by the camera`s Z movement (or maybe the null wich controls the camera), so you are like a bird flying and watching the road growing at your feet.
  No matter where in Z you are, that End value will always be close to you so you can see the road`s end border…
  (My explanation is awful, but I think you get the picture)

  I tried tweaking a bit that “Fade opacity of a 3D layer based on distance from camera” expression, but not getting great results (mainly because at certain point that X value increases more than the camera Z movement and the road grows at 100%)

  Many thanks!

  Peter Zeet replied 13 years, 10 months ago 1 Member · 0 Replies
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