Processing is an actively used programming language created in 2001. Processing is an open source computer programming language and integrated development environment (IDE) built for the electronic arts, new media art, and visual design communities with the purpose of teaching the fundamentals of computer programming in a visual context, and to serve as the foundation for electronic sketchbooks. The project was initiated in 2001 by Casey Reas and Benjamin Fry, both formerly of the Aesthetics and Computation Group at the MIT Media Lab. In 2012, they started the Processing Foundation along with Daniel Shiffman, who joined as a third project lead. Read more on Wikipedia...

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Example code from the Hello World Collection:

// Hello world in Processing

println( "Hello world!" );

Example code from Linguist:

 * Shape Primitives. 
 * The basic shape primitive functions are triangle(),
 * rect(), quad(), ellipse(), and arc(). Squares are made
 * with rect() and circles are made with ellipse(). Each 
 * of these functions requires a number of parameters to 
 * determine the shape's position and size. 

void setup() {
  size(640, 360);

void draw() {
  triangle(18, 18, 18, 360, 81, 360);

  rect(81, 81, 63, 63);

  quad(189, 18, 216, 18, 216, 360, 144, 360);

  ellipse(252, 144, 72, 72);

  triangle(288, 18, 351, 360, 288, 360); 

  arc(479, 300, 280, 280, PI, TWO_PI);

Example code from Wikipedia:

PShape usa;
PShape state;
String [] Obama  = { "HI", "RI", "CT", "MA", "ME", "NH", "VT", "NY", "NJ",
	 "FL", "NC", "OH", "IN", "IA", "CO", "NV", "PA", "DE", "MD", "MI",
	 "WA", "CA", "OR", "IL", "MN", "WI", "DC", "NM", "VA" };

String [] McCain = { "AK", "GA", "AL", "TN", "WV", "KY", "SC", "WY", "MT",
	 "ID", "TX", "AZ", "UT", "ND", "SD", "NE", "MS", "MO", "AR", "OK",
	 "KS", "LA" };

void setup() {
  size(950, 600);
  // The file "Blank US Map (states only).svg" can be found at Wikimedia Commons
  usa = loadShape("!Blank_US_Map_(states_only).svg");
  smooth(); // Improves the drawing quality of the SVG

void draw() {
  // Draw the full map
  shape(usa, 0, 0);
  // Blue denotes states won by Obama
  statesColoring(Obama , color(0, 0, 255));
  // Red  denotes states won by McCain
  statesColoring(McCain, color(255, 0, 0));
  // Save the map as image
  saveFrame("map output.png");

void statesColoring(String[] states, int c){
  for (int i = 0; i < states.length; ++i) {
    PShape state = usa.getChild(states[i]);
    // Disable the colors found in the SVG file
    // Set our own coloring
    // Draw a single state
    shape(state, 0, 0);

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Last updated August 9th, 2020

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