Processing - Programming language

Processing is a programming language created in 2001.

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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...

Tags: programming language
There are at least 78,037 Processing repos on GitHub
Early development of Processing happened in MIT
The Google BigQuery Public Dataset GitHub snapshot shows 5k users using Processing in 7k repos on GitHub
There are 53 Project Euler users using Processing
Explore Processing snippets on Rosetta Code
Processing appears in the TIOBE Index
GitHub supports syntax highlighting for Processing
processing.org was registered in 2003
See also: (11 related languages) Java, Logo, OpenGL, PostScript, C, JavaScript, Arduino Programming Language, Scala, Clojure, Lisp, Max

Example from hello-world:

size(128, 128);
background(0);
textAlign(CENTER, CENTER);
fill(255);
text("Hello World", width / 2, height / 2);

Example from the Hello World Collection:

// Hello world in Processing

println( "Hello world!" );

Example 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);
  background(0);
  noStroke();
}

void draw() {
  fill(204);
  triangle(18, 18, 18, 360, 81, 360);

  fill(102);
  rect(81, 81, 63, 63);

  fill(204);
  quad(189, 18, 216, 18, 216, 360, 144, 360);

  fill(255);
  ellipse(252, 144, 72, 72);

  fill(204);
  triangle(288, 18, 351, 360, 288, 360);

  fill(255);
  arc(479, 300, 280, 280, PI, TWO_PI);
}

Example 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("http://upload.wikimedia.org/wikipedia/commons/archive/1/1a/20130330152451!Blank_US_Map_(states_only).svg");
  smooth(); // Improves the drawing quality of the SVG
  noLoop();
}

void draw() {
  background(255);
  // 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
    state.disableStyle();
    // Set our own coloring
    fill(c);
    noStroke();
    // Draw a single state
    shape(state, 0, 0);
  }
}

Language features

Feature	Supported	Example	Token
Strings	✓	"Hello world"	"
MultiLine Comments	✓	/* A comment */	/* */
Line Comments	✓	// A comment	//
Comments	✓
Semantic Indentation	X