Basic demonstrations of how Processing works, from the Processing.org web site. All of the following demos were written by Casey Reas and Ben Fry unless otherwise stated.
Structure
Statements and Comments
Coordinates
Width and Height
Setup and Draw
No Loop
Loop
Redraw
Functions
Recursion
Recursion 2
CreateGraphics
Form
Points and Lines
Shape Primitives
Simple Curves
Pie Chart
Vertices (Note: Canvas can't do all styles of curved vertex.)
Triangle Strip (Note: Only normal triangles are drawn.)
Bezier
Bezier Ellipse
Data
Variables
Integers and Floats
True/False
Characters and Strings (Firefox 3)
Datatype Conversion
Variable Scope
Control
Iteration
Embedded Iteration
Conditionals 1
Conditionals 2
Logical Operators
Math
Increment/Decrement
Operator Precedence
Modulo
Distance 1D
Distance 2D
Sine
Sine and Cosine
Sine Wave
Additive Wave
Polar to Cartesian
Arctangent
Graphing 2D Equation
Random
Double Random
Noise 1D
Noise 2D
Noise 3D
NoiseWave
Typography
Letters (Firefox 3)
Words (Firefox 3)
Image
Displaying
Background Image
Pointillism
Transparency
Sprite
Alphamask (Note: Canvas can't alpha-blend properly.)
CreateImage
Color
Hue
Saturation
Brightness
Color Wheel
Reading
Creating
Relativity
Linear Gradient
Transform
Translate
Scale
Rotate
Triangle Flower
Arm
Input
Mouse 1D
Mouse 2D
MousePress
Mouse Signals
Easing
Constrain
Storing Input
Mouse Functions
Keyboard
Keyboard Functions
Milliseconds
Clock
Arrays
Array
Array 2D
Array Objects
Objects
Objects
Multiple Constructors
Composite Objects (Note: Canvas can't do all styles of curved vertex.)
Inheritance
Neighborhood
Web
Embedded Links