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IF / ELSE scale expression
Hello Guys!
I got two layers in a composition BARGRAPH and SHAPE10
I am making the BARGRAPH grow from 0% to 100% on the y-axis (scale) over different amounts of time.
As it grows, I want some shapes to pop-up on the screen when the scale reaches, on the y-axis ,for example 10%, 20%, 30%….
So, when the BARGRAPH y-scale reaches 10%, I want to link it to the SHAPE10 scale, so the SHAPE10 scale will grow from 0% to 100%. The movement needs to last something like half a second, so it will not just appear on the screen.
I know I need to apply on the SHAPE10 scale, something like this:
if(thisComp.layer(“BARGRAPH”).transform.scale[1]>10) 100 else 0;
But I know it is not right and I need to work on the dimensions, arrays and everything…
I have no idea how to make it work, i’ve been working with motion design for 5 years, but expressions are really hard for me.
Thanks in advance!
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3 Replies
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you would need to have a way to determine what time the bargraph layer’s y-scale hits 10%.
if you used 2 linear keyframes for the bargraph scale animation, you can calculate the time it would reach 10% (or any percentage)…
try this:
target = thisComp.layer("BARGRAPH");
trigger = 10; // value in %
minScale = 0; // value in %
maxScale = 100; // value in %
dur = .5; // value in seconds
tStart = target.scale.key(1).time + ( trigger / 100 ) * ( target.scale.key(2).time - target.scale.key(1).time );
if ( target.scale[1] > trigger ) s = linear( time, tStart, tStart + dur, minScale, maxScale) else s = 0;
[ s, s ]
if you are using ease keyframes, it will be tougher….Kevin Camp
Art Director
KCPQ, KZJO & KRCW -
Thanks Kevin, but I think that will not work for me. ☹
I’m only working with 2 linear keyframes to make the y-scale go from 0% to 100%, but I think I can make it easier for you guys to help me.
I only need the SHAPE10 layer to appear on the screen when the BARGRAPH yscale reaches >10%.
I cant work with time or duration, because I need to apply this in many different comps with many different durations by just adjusting the linear keyframes.I would like to adjust the linear keyframes on the BARGRAPH and make the SHAPE10 layer appear automatically when the yscale is more than 10% (and be able to apply it to other percentages and other layers).
Thaks in advance!
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If you want it to just appear when it goes above 10, your expression was fine. You just need to apply it to shape10 opacity.
if(thisComp.layer(“BARGRAPH”).transform.scale[1]>10) 100 else 0;
Otherwise I’m confused on what you are trying to do.
“I only need the SHAPE10 layer to appear on the screen when the BARGRAPH yscale reaches >10%.”
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