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Processing == Java + Extra Utilities Processing Adds: Drawing functions

Processing == Java + Extra Utilities Processing Adds: Drawing functions Text and font manipulations Image and video 3D transformations Keyboard interaction An editor …. Best way to see what Processing becomes is to generate a Java program and compare File | Export

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Processing == Java + Extra Utilities Processing Adds: Drawing functions

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  1. Processing == Java + Extra Utilities Processing Adds: • Drawing functions • Text and font manipulations • Image and video • 3D transformations • Keyboard interaction • An editor • …

  2. Best way to see what Processing becomes is to generate a Java program and compare • File | Export • Look in generated applet folder

  3. What's different? • Import of core Processing libraries • Import of numerous Java libraries • Encapsulation of code in subclass of PApplet • Explicit visibility – public, private … • Number format changes if (random(1.0) < 0.5) -> if (random(1.0f) < 0.5f) • color data types are converted to int • Some functions are changed numbers = int(snumbers); -> numbers = PApplet.parseInt(snumbers); • Added public static void main() {…

  4. The smallest program in Processing println("Hello World!"); All Java programs start with at the special function … public static void main() { … The equivalent program in Java. class HelloWorldApp { public static void main(String[] args) { // Display the string. System.out.println("Hello World!"); } } This must be added to the generated Java program

  5. PApplet • The top-level class in Processing • The class in which all your Processing code goes • Implements most of Processing's core behavior • Way down the Java hierarchy • java.lang.Object • ↘ java.awt.Component • ↘ java.awt.Container • ↘ java.awt.Panel • ↘ java.applet.Applet • ↘ processing.core.PApplet http://processing.googlecode.com/svn/trunk/processing/build/javadoc/core/processing/core/PApplet.html

  6. Nearly all of Java is available from Processing http://download.oracle.com/javase/6/docs/api/

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