Decaying Bounce

This expression allows you to “drop” a layer from the top of the screen and have it bounce in
the center of the comp as if tied to a string, with a bounce decay control.

After Effects 7
Useful things
Expressions

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First, create a small solid called “Control Layer” and hide it in the timeline. Add 3 Slider
Control effects, naming them “velo control”, “amplitude control” and “decay control”.
Suggested initial slider values for each are -200, -200 and 4 respectively.
Paste the expression below into the Position property of the layer you wish to bounce, and be
sure to set the layer's anchor point to the correct location, such as the bottom edge if dropping
from the top.
by Dan Ebberts & Steve Holmes

veloc = thisComp.layer("Control Layer").effect("velo control")("Slider");
amplitude = thisComp.layer("Control Layer").effect("amplitude control")("Slider");
decay = thisComp.layer("Control Layer").effect("decay control")("Slider");
y = amplitude*Math.cos(veloc*time)/Math.exp(decay*time);
value + [0,y]

(Min. Version: After Effects 7, Category: Useful things, Type: Expressions)

posted by MaxX on Jan 16, 2009

Lightwrap in After Effects

This brief tutorial covers the compositing technique of light wrapping.

After Effects CS4
Keying
Video-/Tutorials

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posted by jamie on Jan 13, 2012

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Lightwrap Preset

This is a preset that you can use on green screen footage or just general compositing.

After Effects CS5
Keying
Presets (ffx)

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posted by jamie on Jan 13, 2012

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3D Cube Creator

This script is used to create a 3d cube. You can later replace the different sides and spin the null around for easy animation.

After Effects CS3
3D
Scripts (jsx)

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posted by MicGyver on Nov 11, 2011

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Decaying Bounce

Related topics:

Lightwrap in After Effects

Lightwrap Preset

3D Cube Creator