• Adobe After Effects Expressions

  Math for Making a Cylinder

  Posted by Tim Mathews on December 22, 2010 at 4:58 pm

  Hoping to find a formula for making a cylinder out of equi-width layers.
  Say, we have 60 layers and they’re all 10 pixels in width.

  How do you determine the angles each layer needs to be to make a complete cylinder?
  Also, how do you determine what the radius should be to keep the layers from overlapping?

  Thanks in advance for the help
  Tim

  Tim Mathews replied 15 years, 8 months ago 2 Members · 3 Replies
• 3 Replies

• 

  Chris Wright

  December 28, 2010 at 10:03 pm

  any Polygon angle
  Any Polygon n (n-2) × 180°
  https://www.mathsisfun.com/geometry/interior-angles-polygons.html

  any polygon side length
  distance from the center of the polygon to the midpoint of any side
  side=2atan(pi/n)

  distance from the center to a vertex
  side=2rsin(pi/n)

  https://www.mathopenref.com/polygonsides.html

  this is why we use 3D programs!

  https://technicolorsoftware.hostzi.com/
• 

  Chris Wright

  December 29, 2010 at 9:25 am

  here is a auto script panorama.
  https://aescripts.com/pt_panorama/

  https://technicolorsoftware.hostzi.com/
• 

  Tim Mathews

  January 4, 2011 at 6:11 pm

  Thanks Chris, I’ll give this a try. Sorry for such a long gap in response, I’ve been on vacation over the Holidays.

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