• Adobe After Effects Expressions

  Opacity at camera- how to apply to per character 3d?

  Posted by Riccardo Sinti on April 20, 2012 at 5:06 pm

  I have a text layer where I am animating the letters with per-character 3d. I want to wipe them off sequentially using Y-rotation. I set Y-rotation to -180 and adjust the offset. Of course this just rotates the characters to their back side. So I add opacity to the animator. But I still see the back side of the text before it goes to zero opacity.
  I would like to apply this opacity expression somewhere so when each character turns away from the camera it disappears.
  if (toCompVec([0, 0, 1])[2] > 0 ) value else 0
  where would I apply this?

  Thanks

  Riccardo Sinti replied 14 years, 4 months ago 2 Members · 2 Replies
• 2 Replies

• 

  Juan Salvo

  April 24, 2012 at 5:15 am

  Instead of -180, why not -90?

  online editor | colorist | VFX | BD author

  https://JuanSalvo.com
• 

  Riccardo Sinti

  April 24, 2012 at 7:58 pm

  At 90° characters in the center of the comp are exactly perpendicular to the view but others at the edges are not and you would still see them at an angle. doing a full 180° rotation with an expression on opacity would insure that the back face of the character is not visible.

  Thank You

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