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Adding Overshoot expression to Scale expression
Hello, please, is there any way I could add this overshoot expression above to my scale expression below
try {
amp = effect(“Scale – Overshoot”)(“ADBE Slider Control-0001”) / 2.5, freq = effect(“Scale – Bounce”)(“ADBE Slider Control-0001”) / 20, decay = effect(“Scale – Friction”)(“ADBE Slider Control-0001”) / 20, n = 0, 0 < numKeys && (n = nearestKey(time)
.index, key(n)
.time > time && n–), t = 0 === n ? 0 : time – key(n)
.time, 0 < n ? (v = velocityAtTime(key(n)
.time – thisComp.frameDuration / 10), value + v / 100 * amp * Math.sin(freq * t * 2 * Math.PI) / Math.exp(decay * t)) : value;
} catch (e$$4) {
value = value;
}
Scale Expression
function easeInOutCubic(t, tMin, tMax, value1, value2){
b = value1;
c = value2-b;
d = tMax-tMin;
t = tMin < tMax ? thisLayer.linear(t,tMin,tMax,0,d) : thisLayer.linear(t,tMin,tMax,d,0);
t /= d/2;
if (t <1) return c/2*Math.pow(t,3) + b;
t -= 2;
return c/2*(Math.pow(t,3) + 2) + b;
}
duration = .47;
start=[0,0,0];
destination = [100,100,100];
exit = [0,0,-0];
middle = (inPoint+outPoint)/2;
v = time < middle ? easeInOutCubic(time,inPoint,inPoint+duration,start,destination) : easeInOutCubic(time,outPoint-duration,outPoint,destination,exit);
Thank you
Regards,
Obed
replied 1 year, 9 months ago 2 Members · 8 Replies
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8 Replies
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I don’t think it will work, because your easeInOut expression has zero velocity at the end of the ease, and overshoot depends on incoming velocity.
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Hi Dan,
Ok. Please is there any way I could add it to the inPoint only?
Regards,
Obed
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I’m not sure I understand what you mean, but an easeInOut has zero velocity at both ends, so I’m guessing no.
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Please, I am trying to scale from 0 to 100 instead of keyframe, then overshoot and maintain 100 until layer outPoint goes back to 0.
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Ok, Dan.
Thank you.
Regards,
Obed
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Hello Dan,
I tried modifying your scalar bounce expression by adding outPoint to it, where the outPoint and the inPoint have the same value. However, the overshoot failed to work. Is there any possible way to do this? Thank you. :
freq = 3;
decay = 5;
t = time – inPoint;
startVal = [0,0];
exit =[0,0]
endVal = [effect(“Slider Control”)(“Slider”),effect(“Slider Control”)(“Slider”)];
dur = 0.1;
if (t < dur){
linear(t,0,dur,startVal,endVal);
}else{
amp = (endVal – startVal)/dur;
w = freq*Math.PI*2;
endVal + amp*(Math.sin((t-dur)*w)/Math.exp(decay*(t-dur))/w);
}
middle = (inPoint+outPoint)/2;
v = time < middle ? easeIn(time,inPoint,inPoint+dur,startVal,endVal) : easeOut(time,outPoint-dur,outPoint,endVal,exit);
v
Regards,
Obed
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What is it exactly that you want to happen? It’s not clear to mean from what you’ve described so far…
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