• Adobe After Effects Expressions

  Multiple IF statements syntax question

  Posted by Joel Bellagamba on September 19, 2017 at 9:48 pm

  Can anyone help with some IF statement syntax? No errors are shown, but this just doesn’t seem to work, to control whether an object comes in from left, top, right or bottom based on a slider (1-4):

  if (comp("ObjectControl").layer("Control").effect("Direction")("Slider")==1) {
horiz=3050}
if (comp("ObjectControl").layer("Control").effect("Direction")("Slider")==3) {
horiz=-3050}
if (comp("ObjectControl").layer("Control").effect("Direction")("Slider")==2) {
vert=2550}
if (comp("ObjectControl").layer("Control").effect("Direction")("Slider")==4) {
vert=-2550}
else{
horiz=0
vert=0
}

  [easeOut(time,inPoint,inPoint+1, value[0]+horiz, value[0]),ease(time,inPoint,inPoint+1,value[1]+vert,value[1])]

  I’m sure it’s the IF statements, as using:

  horiz=3050;
vert=2250;
[easeOut(time,inPoint,inPoint+1, value[0]+horiz, value[0]),ease(time,inPoint,inPoint+1,value[1]+vert,value[1])]

  achieves a result, albeit just one of the four I need.

  Mahdi Mehrabi replied 5 years, 1 month ago 4 Members · 5 Replies
• 5 Replies

• 

  Kevin Camp

  September 19, 2017 at 11:09 pm

  i think you want to use else if… but you’re also missing some semicolons at the end of each line.

  if (comp("ObjectControl").layer("Control").effect("Direction")("Slider")==1) horiz=3050;
else if (comp("ObjectControl").layer("Control").effect("Direction")("Slider")==3) horiz=-3050;
else if (comp("ObjectControl").layer("Control").effect("Direction")("Slider")==2) vert=2550;
else if (comp("ObjectControl").layer("Control").effect("Direction")("Slider")==4) vert=-2550;
else{
horiz=0;
vert=0;
}

  [easeOut(time,inPoint,inPoint+1, value[0]+horiz, value[0]),ease(time,inPoint,inPoint+1,value[1]+vert,value[1])]

  Kevin Camp
  Art Director
  KCPQ, KZJO & KRCW
• 

  Dan Ebberts

  September 19, 2017 at 11:19 pm

  I think I’d do it like this:

  
horiz=0;
vert=0;
d = comp("ObjectControl").layer("Control").effect("Direction")("Slider").value;
if (d==1) horiz=3050
else if (d==3) horiz = -3050
else if (d==2) vert = 2550
else if (d==4) vert = -2550;
offset = easeOut(time,inPoint,inPoint+1, [horiz,vert],[0,0]);
value + offset


  Dan
• 

  Joel Bellagamba

  September 20, 2017 at 8:17 am

  Many thanks, Dan. This code worked a treat!

  Simon
• 

  Joel Bellagamba

  September 20, 2017 at 8:20 am

  Thanks for taking a look, Kevin.

  This gave me an expression error, unfortunately. Though, Dan has supplied a re-write (below) which works.

  Simon
• 

  Mahdi Mehrabi

  March 26, 2021 at 10:36 am

  Hello there

  I want to use multiple if with a checkbox controller. when the first checkbox is checked, first if works.

  for the second checkbox, I have another if statement.

  and finally, for the third checkbox, I will have another if statement.

  How can I do this kind of expression?

Reply to this Discussion! Login or Sign Up