Wheel

Basic algebra is used to create a realistic wheel animation.

Discussed at: Ranges of Values
Project files: Macintosh / Windows

Interpolation Methods

Simple project to illustrate the differences between the four interpolation methods provided by After Effects: linear(), ease(), ease_in() and ease_out().

Discussed at: Interpolation Methods
Project files: Macintosh / Windows

Scroll Project

Simple use of the linear() interpolation method to emulate an interface-style scroll bar.

Discussed at: Interpolation Methods
Project files: Macintosh / Windows

Distance Based Blur and Scale

Expression controlling Fast Blur based on the proximity of a control layer. Same basic expression also applied to layer's scale parameter, for a different effect.

Discussed at: Distances and Lengths
Project files: Macintosh / Windows

Trigonometric Functions Demo

Demonstration of the relative values of the three 'core' trigonometric functions: sine, cosine and tangent. Drag a layer to specify an angle, and see the corresponding trigonometric values.

Discussed at: Graphs: sine, cosine and tangent
Project files: Macintosh / Windows

Circular Motion

Simple expression showing how to move a layer in a circle, using basic trigonometry.

Discussed at: Circular Functions
Project files: Macintosh / Windows

Circular Placement

Demonstation of a 'step-and-repeat' technique using an expression to position layers in a circle.

Discussed at: Circular Functions
Project files: Macintosh / Windows

Spring

Demonstrates of Simple Harmonic Motion, as it applies to a spring-like animation. Variations on this basic animation illustrate frequency and amplitude, as well as wave addition and multiplication.

Discussed at: Simple Harmonic Motion; Frequency and Amplitude; Adding, Multiplying Waves
Project files: Macintosh / Windows

Point At

Applying the inverse trigonometric function arctangent to find the angle of a vector (in this case, the vector between two positions).

Discussed at: Inverse Functions
Project files: Macintosh / Windows