• Adobe After Effects Expressions

  Changing values to percentages

  Posted by Lukasz Pason on March 11, 2010 at 7:48 pm

  Would this be interpolation methods?

  I’m trying to say that 0-20 = 0-100% as well as 0-160 = 0-100%. How is this done?

  Motion Designer / DJ / Father
  http://www.lukaszpason.com
  http://www.krop.com/lukasz

  Lukasz Pason replied 16 years, 1 month ago 3 Members · 8 Replies
• 8 Replies

• 

  Lukasz Pason

  March 11, 2010 at 8:01 pm

  I think I got it.

  opacityController = thisComp.layer("Soundkey 01").effect("Sound Keys")("Output 1") ;

  if ((opacityController > 0) & (opacityController < 20)) {

  ease(opacityController, 0, 60);
}else{ 0; }

  Motion Designer / DJ / Father
  http://www.lukaszpason.com
  http://www.krop.com/lukasz
• 

  Darby Edelen

  March 12, 2010 at 1:09 am

  You’ve got the right idea, but I’m confused about the way you’ve done it.

  ease() should expect fourth and fifth arguments. Are you not getting errors with the above expression? This is the way I would do it:

  
opacityController = thisComp.layer("Soundkey 01").effect("Sound Keys")("Output 1");

  ease(opacityController, 0, 20, 0, 100);


  The above should work if you’re trying to stretch numbers in the range 0-20 to 0-100.

  Darby Edelen
• 

  Lukasz Pason

  March 12, 2010 at 6:40 pm

  How about this? Is this only responding to an input of 20 through 50 and adjusting the opacity from 0 to 60?

  opacityController = thisComp.layer("Soundkey 01").effect("Sound Keys")("Output 1");

  if ((opacityController >20) && (opacityController < 50)) {

  easeIn(opacityController, 20, 60, 0, 60);
  easeOut(opacityController, 20,60,60,0);

  }else{ 0; }


  Motion Designer / DJ / Father
  http://www.lukaszpason.com
  http://www.krop.com/lukasz
• 

  Dan Ebberts

  March 12, 2010 at 7:09 pm

  Maybe this is what you’re after:

  opacityController = thisComp.layer(“Soundkey 01”).effect(“Sound Keys”)(“Output 1”);

  if (opacityController < 50) ease(opacityController, 20, 50, 0, 60) else 0; Dan
• 

  Lukasz Pason

  March 12, 2010 at 8:03 pm

  Thanks Dan! Ill check this out! My solution kinda worked. I need to take a math class. I never made it past algebra and it seems like some of the more complex stuff is going to really make my head go bananas. Thanks for your help!

  Motion Designer / DJ / Father
  http://www.lukaszpason.com
  http://www.krop.com/lukasz
• 

  Lukasz Pason

  March 12, 2010 at 8:09 pm

  What about this?

  opacityController = thisComp.layer("Soundkey 01").effect("Sound Keys")("Output 1") ;

  easeIn(opacityController, 120,140,0,40);
easeOut(opacityController, 120,140,0,40);


  Motion Designer / DJ / Father
  http://www.lukaszpason.com
  http://www.krop.com/lukasz
• 

  Dan Ebberts

  March 12, 2010 at 8:20 pm

  If you do that, the easeIn() won’t have any effect – easeOut() will control everything. ease(opacityController, 120,140,0,40) will give you ease at both ends. Is that what you’re after?

  Dan
• 

  Lukasz Pason

  March 12, 2010 at 8:26 pm

  hhhhmmmmmm….
  It is what I am after, but it seemed like my way looked different. Let me take a peak into it again. Thanks Dan

  Motion Designer / DJ / Father
  http://www.lukaszpason.com
  http://www.krop.com/lukasz

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