Mar 15, 2017 Adobe After Effects Expression Cheat Sheet Table Of Contents Globals Contextual Variables Objects Project Composition Object Properties & Functions Functions Time Conversion Locating Project Elements Tips & Tricks Set Size And Position Of Shape To Text Add Interlacing Jitter. How to apply the bounce expression in After Effects? Animate your property with at least 2 linear keyframes. Alt-click on the property and paste the expression below. Change amp, freq and decay variables to modify the bounce. The index expression isn’t rocket science, but it is nevertheless an incredibly powerful tool in After Effects. Essentially the index expression returns a value based on the layers position in the timeline. For example, a the 4th layer in a timeline will return a value of 4. Linear is an interpolation method. The expression lets you represent values in a variety of different ways, which Jake says “is key to making custom controls” in After Effects. Bartlett explains the structure and functionality of the expression and walks through a couple of examples showing how it can work. Ukramedia’s Sergei Prokhnevskiy.

Wiggle X or Y axis only in After Effects CC

This guide has everything you need to know about simple scripts to wiggle in X or Y direction only in Adobe After Effects. Keep reading…

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About X axis and Y axis

What is X axis and Y axis? Let’s look at the X and Y axis example image below. The red axis below is the X axis. The green axis below is the Y axis. Another name is an X and Y graph:

Let’s start with how to wiggle only in the X-axis first (only X!):

The Easy Expression to add to Position, for wiggle in X axis only (the red axis above) is:
x = transform.position[0]; y = transform.position[1]; w = wiggle(2,100); [w[0],y];
In the example expression above, 2 is the amount on wiggles per second, 100 is the maximum wiggle value in the X axis.

Here are some alternative, tried and tested wiggle X or Y axis only (see green and red axis above) expressions you can use:

wiggle only in X (horizontal)

This is the expression for position to wiggle X only:
org=value; temp=wiggle (5,50); [temp[0],org[1]];
Shorthand (short version):
[wiggle(5,50)[0],position[1]]

Wiggle only in Y (vertical)

This is the expression for position to wiggle Y only:
org=value; temp=wiggle (5,50); [org[0],temp[1]];
Shorthand (short version):
[position[0],wiggle(5,50)[1]]

Now you know how to create a wiggle expression in After Effects for only X or Y direction! Hopefully, you found this page about how to wiggle in x or y-axis only helpful.

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Here are some more more articles and pages:

SOFI K – Fall Back Down (Music Video)
Anders Sundstedt Portfolio
Start or stop wiggle at specific time
After Effects Eye Blink Expression
Animating a head-bob in After Effects
How to lock the position of a mask in After Effects
Moving anchor point to center of content in After Effects
Exporting Photoshop Animation To After Effects & Looping Forever
Replace and Reconnect a PSD file in After Effects
Bring Back SHIFT KEY For Proportional Transform in Photoshop 2020
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Great after effects expressions.

Circle Fun

This generates perfect circular motion centered around the original position of the layer. I recommend that you map the radius and
cycle inputs to Expresso sliders, and the phase input to an Expresso angle.

Apply this expression to the position of the layer

radius = 75; // the radius of the circle
cycle = 1; // number of seconds to complete a circle; higher value = slower
if(cycle 0){cycle = 0.001;} //avoids a “divide by zero” error
phase = 27; // initial angle in degrees from bottom
reverse = 1; // 1 for ccw, -1 for cw
x = Math.sin( reverse * degrees_to_radians(time * 360 / cycle + phase));
y = Math.cos(degrees_to_radians(time * 360 / cycle + phase));
add(mul(radius, [x, y]), position)

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Track a Child

This expression is designed to track the position of a layer that has been parented to one or more layers.
Use the expression below on the position property that you wish to animate, changing the name “Child” to match the neame of the
layer you wish to track. For instance, if you wat to use write-on to track the position of a layer called “moon”,

apply this expression
to the “brush position” property of the write-on filter, and change “child” to “moon”.

c = this_comp.layer(“child”);
c.to_comp(c.anchor_point)

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Adjustable Position Wiggle

Use this expression as an interactive, keyframeable Wiggler.

Apply it to the position of the layer you wish to wiggle.

wigfreq = 3; //wiggle frequency
wigamt = 30; //wiggle amount
wigdetail = 3; //detail of noise
position.wiggle(wigfreq, wigamt, wigdetail)

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After Effects Expression Linear Position