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Same expression works in one comp but not in the others
I have a main comp (“footage strip”) with 4 nested comps named set1, set2, set3, and set4; each has a marker at different times.
Inside each “Set” comp there is a few layers, one of which needs to fade in when the markers in the outer comp layers are passed, for that I added this expression to the opacity:
c=comp(“footage strip”);
l= c.layer(thisComp.name);
s=l.marker.key(1).time;
d=comp(“footage strip”).layer(“xp”).effect(“fd”)(“Slider”);
ease(time,s,(s+d),0,100);
The problem is that it works as expected on Set1 but it does nothing on the remaining three, there is no error warning, it just stays at 0 after the markers are passed on each layer in the top comp.
I tried replacing thisComp.name with the index for each layer (which defeats the purpose of the expression anyway) and didn’t work either.
Thanks in advance for your help.
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7 Replies
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Just a hunch that the ones that don’t work also don’t start at time=0 in the “footage strip” comp.
If that’s the case, try this:
c=comp("footage strip");
l= c.layer(thisComp.name);
s=l.marker.key(1).time;
d=comp("footage strip").layer("xp").effect("fd")("Slider");
s -= l.startTime;
ease(time,s,(s+d),0,100); -
This works great, as always thanks a lot!
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Hey Da, any chance you can explain this line a little more in detail?
s -= l.startTime;
looks like part of a conditional statement but is not quite, I’m not clear on what is doing or how
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It just subtracts the layer’s start time from the marker time, to compensate for the layer not starting at time = 0.
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but why the = sign? wouldn’t it work just by typing s-l.startTime?
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s -= l.startTime;
is equivalent to this:
s = s - l.startTime;
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I learned something new today. Thanks!
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