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Expression bounce help
I’m quite new to expressions and need a little help.
I’m using the following to add a little bounce to an animation:
t=time-key(2).time;
if (t<0){
value;
}else{
veloc = 18;
amplitude = 60;
decay = 6;
y = amplitude*Math.cos(veloc*t)/Math.exp(decay*t);
value+[0,0,y];
}Which starts the bounce on the second keyframe, does anyone know how i can modify it so the object bounces on every keyframe I add?
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4 Replies
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Try this:
n = 0;
if (numKeys > 0){
n = nearestKey(time).index;
if (key(n).time > time){
n–;
}
}
if (n == 0){
value
}else{
t = time – key(n).time;
veloc = 18;
amplitude = 60;
decay = 6;
y = amplitude*Math.cos(veloc*t)/Math.exp(decay*t);
value+[0,0,y];
}Dan
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Plese forgive my intrusion but what attribute does one enter this into, position? I know very little about expressions but I try to use them when I can. I just can’t figure out where to put this.
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Yes, this would be for position property of a 3D layer. The bounce will be in the z direction. If you wanted it to bounce a 2D layer in the y direction, you would just change this:
value+[0,0,y];
to thie:
value+[0,y];
Hope that helps.
Dan
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Thanks a lot!
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