Using loop expressions in conjunction with other expressions

[Seymour Frost]

Hello! Is there any way to use a loop expression on a property that already has an expression on it? The problem I came across was in building a simple rig that used an expression on the scale property to maintain the volume of an object. But then, when I went to put an loopOut() expression on this property, it would not loop.

on scale:

var x = value[0];

var xFactor = (100 – x);

var y = 100 + xFactor;

[x, y];

and then to loop the set of keyframes I made, regardless of whether I needed to move the keyframes in the comp:

loopIn() + loopOut() – value;

I’ve tried redefining the value as the returned array from the first part of the code, but that didn’t work. I thought that the loop expressions simply read the value of the keyframes that were set, and thus wouldn’t be impacted by any expressions making calculations on every frame. Am I just fundamentally misunderstanding something?

Thanks!

[Dan Ebberts]

I think you just need to stick the result of your loop calculation into a variable and use that instead of value in the other part of your expression, like this:

val = loopIn() + loopOut() - value;
x = val[0];
xFactor = (100 - x);
y = 100 + xFactor;
[x, y];

[Seymour Frost]

Thanks so much, Dan! That, of course, worked brilliantly.