Processing Overview

John Resig has written a good overview of Processing. Processing is a data visualization language written in Java that has been compared favorably to Flash. I first saw the language a couple of years ago and was very interested in it, but haven't seen much on it until this.

Below is an excerpt from the post.

Processing is a data visualization programming language.

It has three components:

• The Processing language
• The Processing drawing API
• The implementation (in Java - can optionally pass the drawing API through to OpenGL).

The Processing Language and API

• Strictly typed
• Has classes, inheritance
• Includes a bunch of globally-accessible functions (the drawing API - very flat and PHP-like).

Basic Program Structure

Two core methods: setup() and draw()

• Very OpenGL-like
• draw() is called continually at a specific framerate (if none is specified then it goes as fast as possible)

Simple example: Drawing a continuous line with the mouse.

void setup() {
  size(200, 200);
  background(102);

}

void draw() {
  stroke(255);
  if(mousePressed) {

    line(mouseX, mouseY, pmouseX, pmouseY);
  }
}

You can read the full post here.

Processing is a very interesting language and I could see it being very useful for applications that need a better way to represent information than is available in browser rendering. If you have never seen Processing, then you should look at some of the examples in John's post.