• Adobe After Effects

  infinity

  Posted by Damani on January 8, 2007 at 4:58 pm

  Hello all< I wanted to know how I can use particular and draw a looping infinity symbol with expressions. I have particular drawing a infinity symbol using key frames, but I need to do it using expressions. Any ideas on the script my trig is very rusty. Thanks all

  Colin Braley replied 19 years, 6 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Colin Braley

  January 8, 2007 at 6:57 pm

  All you need to do is add this expression to the XY Emitter Position property:

  //Begin Expression
  amp = 200; // change this to adjust overall size
  startPos = [360 , 270]; //adjust this to move infinity sign
  freq = 5; // adjust to make drawing of sign faster
  //–
  x = amp * Math.sin( time * freq);
  y = amp * Math.sin( time * 2 * freq);
  [x , y] + startPos
  //End expression

  It might be helpful to link things like startPos and freq to sliders so you can adjust them more easily.

  ~Colin

Reply to this Discussion! Login or Sign Up