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Pendulum Dance in AE expression
I enjoyed watching this video about simple harmonic motion so I decided to use a spare beat this afternoon to build the system in After Effects.
It’s a fairly stripped down system, ideal pendulums not physical, so no damping or decay. Built it with z-depth and a camera, but swap to front-view or turn the camera off for the Ortho projection (also very pretty).
Most of the controls are bound to sliders in the Pin layer, including color randomizer, z-depth control, max amplitude, start at max vs. zero and some other stuff i can’t quite remember right now.
If you want to modify the ball size, just delete Balls2-15, modify the solid size on ball 1, and then re-duplicate up to 15. If you don’t mess with anything else, it should reconnect itself properly to its designated string.
String1-15 and Ball1-15 use index order (or index+expression) to determine their relationships to each other, so if you add a new layer at the top of the comp, the expressions will break until you re-order them and then return them to index 1-30 (and re-activate the expressions).
Have fun, go wild. Do cool stuff.
AE Project File:
SimpleHarmonicPendulums_v001.aep (515kb, AE CS6)Gratitude: Dan Ebbert, Creative Cow, Wikipedia
Music: Slick Cat by Carol Kaye and Joe Pass
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