Swing Effect

[Serge Hamad]

Hi,

Try this from the genious Dan:
https://www.motionscript.com/expressions-lab-ae65/pendulum.html

Salut.
Serge

[Vince Becquiot]

Fantastic tip.

Thank you serge.

Cheers,

Vince

[Markofcain]

Many thanks for your help. This is exactly what I needed.

[Jason Brown]

It wasn’t working for me, but then I FINALLY figured out that it’s relevant to the location in the composition. This expression only works if your layer starts at the beginning of the composition

How do you do this if you need to do a pendelum swing a couple seconds into the layer?

[Dan Ebberts]

One way:


tStart = 2; // start at 2 seconds

t = time - tStart;
if (t > 0){
veloc = 7;
amplitude = 80;
decay = .7;
value + amplitude*Math.sin(veloc*t)/Math.exp(decay*t)
}else{
value
}


Dan

[Jason Brown]

Dan you are an absolutely amazing resource…thank you so much!

I ended up just precomping it and it moved on…but this is helpful.

Thanks again! 🙂

[Jason Brown]

[Dan Ebberts] “tStart = 2; // start at 2 seconds”

How do I apply frames into this math?

Also…I’m trying to flip the layers from basically 90 degrees to the camera…I’m doing this by manipulating transparency and layer start time to get it to look right…is there a better way, it doesn’t need to be exactly 90…I’m going to get into it with a quick dissolve.