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Trigger Mr. Ebbert’s Squash and Stretch?
I notice that in Dan Ebbert’s expression, the Squash and Stretch motion is triggered at the start of the layer. But the layers that I need to squash and stretch need to do so at various points of the animation and splitting them would be far too tedious (several layers each with a mask, all of them parented to a Null which is controlling the scale and motion).
Is there a way to trigger it using a slider or something? I’m trying to avoid keyframing the animation because it doesn’t look as smooth.
Thanks in advance.
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4 Replies
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Here is an expression for having a marker trigger Dan’s squish and squash. Put the expression on Scale. (Copy the expression, Alt-Click the Scale stopwatch, Paste):
n = 0;
if (marker.numKeys > 0){
n = marker.nearestKey(time).index;
if (marker.key(n).time > time){
n–;
}
}if (n == 0){
value;
}else{
max_dev=20; // max deviation in pixels
spd=35; //speed of oscillation
decay=10; //how fast it slows down
t = time – marker.key(n).time;
s = max_dev*Math.sin(spd*(t))/Math.exp(decay*t);
value + [s,s];
}So wherever you place a marker you’ll get the old squish and squash. Hit the asterisk (*) key on the numeric pad to drop a marker wherever you are on the timeline.
There are other ways to trigger expressions, but this is easy and very flexible.
Note: No marker, no squish and squash. Five markers give five squish and squashes.
Also if you’re talking a diferent expression, just drop that in below the }else{.
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Perfect! Thanks a lot!
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Wow, very very usefeul. Thank you so much for this.
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It sounds really simple, however, nothing happened when I pasted the scale expression and added a marker. Can you post a screen grab of an example that I may use as a reference?
Thanks
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