Trigger a animation using a checkbox

[Dan Ebberts]

Try this:


n = 0;
p = thisComp.layer("On/Off Switch").effect("Checkbox Control")("Checkbox");
if (p.numKeys > 0){
n = p.nearestKey(time).index;
if (p.key(n).time > time) n--;
}
if (n > 0 && p.key(n).value)
time - p.key(n).time
else
0


Dan

[George Henderson]

That totally did the trick.
Now would it be possible to get the same result using a wiggle instead of keyframing the Ball comp?

By that I mean having ‘wiggle(.5,5)’ on the On/Off checkbox.

Thanks!

[Dan Ebberts]

I haven’t tried this, but it will probably look like this:


p = thisComp.layer("On/Off Switch").effect("Checkbox Control")("Checkbox");
if (p.value){
gotit = false;
t = time;
while (t >= 0){
if (! p.valueAtTime(t)){
gotit = true;
break;
}
t -= thisComp.frameDuration;
}
if (gotit) time-t else 0;
}else
0


Dan

[George Henderson]

I just want to confirm that both methods worked.
A million thanks Mr. Ebberts 🙂

[George Henderson]

Hello,
As far as I can tell ‘thisComp.frameDuration’ tells it to play the animation from frame 0 all the way to the end.
Is it possible to hold the animation at a certain frame?
Say if the animation is 50 frames, can it play 0 to 42 and hold on frame 42?

I could just cut down the animation to 42 frames, but once the checkbox is set to ‘off’ it’ll reset back to 0 on time remap.

I would like to hold frame 42 while the checkbox is off.

Thanks!

p = thisComp.layer("On/Off Switch").effect("Checkbox Control")("Checkbox");
if (p.value){
gotit = false;
t = time;
while (t >= 0){
if (! p.valueAtTime(t)){
gotit = true;
break;
}
t -= thisComp.frameDuration;
}
if (gotit) time-t else 0;
}else
0

[Dan Ebberts]

Try replacing this:

if (gotit) time-t else 0;

with this:

if (gotit) Math.min(time-t,framesToTime(42)) else 0;

Dan

[George Henderson]

It does hold on the 42nd frame of the animation, but once the checkbox is disabled, it resets back to the first frame.

*I updated the project file with the latest code.

4326_checkboxv2.aep.zip

Thanks!

[Sander Van dijk]

hallo,

Any idea how to make this animate from frame 42 to 0 again once the trigger is switched off again?

Thanks!

p = thisComp.layer("On/Off Switch").effect("Checkbox Control")("Checkbox");
if (p.value){
gotit = false;
t = time;
while (t >= 0){
if (! p.valueAtTime(t)){
gotit = true;
break;
}
t -= thisComp.frameDuration;
}
if (gotit) Math.min(time-t,framesToTime(42)) else 0;
}else
0

[Irma Crusat]

did you ever find a solution? i am stuck with the same problem. 4 years later 🙂

[Ido Shor]

Just wanted to say, this is a G-R-E-A-T expression Dan.

Keep on your holy work 😉