• Adobe After Effects Expressions

  Scale Effect?

  Posted by Elaan Dak on July 31, 2011 at 12:48 pm

  Sorry I’m asking the same question again, but I still don’t know how to do it.
  The thing is that I got the effect I want but the objects is getting outside the camera view, how can I modify the code to offset the objects go to the center, I mean toward the camera in Z axis?
  This is now:

  

  And I’m looking to have this result:

  

  And this is the AE file:

  https://www.box.net/shared/rugaib41hs3a6tjp7om9

  Thanks in advance.

  Elaan Dak replied 14 years, 9 months ago 2 Members · 5 Replies
• 5 Replies

• 

  Dan Ebberts

  July 31, 2011 at 5:07 pm

  Try this:

  
mouse_layer = thisComp.layer("mouse layer");
beginScale = 100;
endScale = 1500;
beginDistance = 40;
endDistance = 0;

  w = thisComp.width;
p0 = value + 30;
camPos = [w/2,thisComp.height/2,-50/36*w];
v = normalize(camPos-p0);
dis = length(position, mouse_layer.position);
val = ease(dis, beginDistance, endDistance, endScale, beginScale);
p0 + v*val


  If you had a camera in the comp, you would use its position instead of the calculated position.

  I wasn’t sure what the +30 is for, but I stuck it in there.

  Dan
• 

  Elaan Dak

  August 1, 2011 at 7:45 am

  Thank you Dan, its working nice.

  One more thing is that all the objects are following the same Z distance, it should be also calculated according to where that object X position is (close or far from the camera), So the object on the very left and the very right should move a longer Z than the one in the center.

  I tried to add this.x to each object’s (endScale) but I ended with that the very right crosses the most distance.

  Thanks again.
• 

  Dan Ebberts

  August 1, 2011 at 1:31 pm

  I don’t have time to test it, but try this:

  mouse_layer = thisComp.layer("mouse layer");
beginScale = 100;
endScale = 1500;
beginDistance = 40;
endDistance = 0;
w = thisComp.width;
p0 = value + 30;
camPos = [w/2,thisComp.height/2,-50/36*w];
m = length(camPos,p0)/camPos[2];
v = normalize(camPos-p0);
dis = length(position, mouse_layer.position);
val = ease(dis, beginDistance, endDistance, endScale*m, beginScale);
p0 + v*val


  Dan
• 

  Elaan Dak

  August 7, 2011 at 1:54 pm

  Thanks guys, you are amazing..

  Everything is fine unless that is goes in the opposite way not toward the camera as it was before..

  

  What value I should add a (-) to?

  This is the current code:

  mouse_layer = thisComp.layer("mouse layer");

  beginScale = 0;
  endScale = 2100;
  beginDistance = 600;
  endDistance = 0;

  w = thisComp.width;
  p0 = value + 30;
  camPos = [1440,540,-2240];
  m = length(camPos,p0)/camPos[2];
  v = normalize(camPos-p0);
  dis = length(position, mouse_layer.position);
  val = ease(dis, beginDistance, endDistance, endScale*m, beginScale);
  p0 + v*val

  Thanks Dan..
• 

  Elaan Dak

  August 7, 2011 at 10:17 pm

  I tried on the camera, and the Z but still not.

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