Processing Language

Fun Approach to Learning
Creative Computer Programming
Oleh: Ismail Adha Kesuma, S.Kom

 Processing adalah bahasa pemrograman dan
lingkungan untuk pemrograman (development
environment) yang bersifat open source untuk
memprogram gambar, animasi, dan suara.
(www.processing.org)
ismailadha@rocketmail.com

 It is especially good for someone studying or working
in a visual field, such as graphic design, painting,
sculpture, architecture, film, video, illustration, web
design, and so on.
 The language has been used to create various data
visualization and installation art pieces
 But most often you just see people playing with it
 creating complex and beautiful pictures and
animations.

 The Processing software runs on the Mac, Windows, and
GNU/Linux platforms.
 With the click of a button, it exports applets for the Web or
standalone applications for Mac, Windows, and
GNU/Linux.
 Graphics from Processing programs may also be exported
as PDF, DXF, or TIFF files and many other file formats.
 Future Processing releases will focus on faster 3D graphics,
better video playback and capture, and enhancing the
development environment.
 Some experimental versions of Processing have been
adapted to other languages such as JavaScript,
ActionScript, Ruby, Python, and Scala; other adaptations
bring Processing to platforms like the OpenMoko, iPhone,
and OLPC XO-1.

 Multi-platform: Any program runs on Windows, Mac OS,
or Linux.
 Secure: Allows high-level cryptography for the exchange of
important private information.
 Network-centric: Applications can be built around the
internet protocols.
 Dynamic: Allows dynamic memory allocation and
memory garbage collection.
 International: Supports international characters.
 Performance: Provides high performance with just-in-
time compiles and optimizers.
 Simplicity: Processing is easier to learn than other
languages such as a C, C++, or even Java.

 In 1967, the Logo programming language was developed by
Daniel G. Bobrow, Wally Feurzeig, and Seymour Papert.
 With Logo, a programmer writes instructions to direct a turtle
around the screen, producing shapes and designs.
 John Maeda’s Design By Numbers (1999) introduced
computation to visual designers and artists with a simple, easy to
use syntax.
 While both of these languages are wonderful for their simplicity
and innovation, their capabilities are limited.
 Processing, a direct descendent of Logo and Design by Numbers ,
was born in 2001 in the “ Aesthetics and Computation ” research
group at the Massachusetts Institute of Technology Media Lab.
 It is an open source initiative by Casey Reas and Benjamin Fry,
who developed Processing as graduate students studying with
John Maeda.

 Casey and Ben began developing Processing in the fall of 2001,
releasing early alpha versions of the software soon after.
 In April 2005, they released the beta version for Processing 1.0 &
over 125,000 people have had downloaded the Processing
software.
 Many leading universities around the world have begun
including Processing in their digital arts curriculum, including
- Parsons School of Design
- Bandung Institute of Technology, Indonesia
- Helsinki University
- Royal Danish Academy of Fine Arts, Copenhagen
- School of the Art Institute of Chicago
- University of Washington
- Elisava School of Design, Barcelona
- (and many, many others).

 Tens of thousands of companies, artists, designers, architects,
and researchers use Processing to create an incredibly diverse
range of projects.
 Design firms such as Motion Theory provide motion graphics
created with Processing for the TV commercials of companies
like Nike, Budweiser, and Hewlett-Packard.
 Bands such as R.E.M., Radiohead, and Modest Mouse have
featured animation created with Processing in their music
videos.
 The University of Washington's Applied Physics Lab used
Processing to create a visualization of a coastal marine
ecosystem as a part of the NSF RISE project.
 The Armstrong Institute for Interactive Media Studies at
Miami University uses Processing to build visualization tools
and analyze text for digital humanities research.

 Tool Processing bisa didownload di:
http://processing.org/download/
(for windows 59,6 Mb)
- Format filenya berekstensi *.zip
 Extract file program (boleh di-extract di direktori
mana pun).
 Karena program ini dibangun dengan bahasa Java,
maka sebelumnya user sudah meng-install Java
Development Kit (JDK). Disarankan untuk
menggunakan JDK versi 6 ke atas.
 Untuk memulai, jalankan file processing.exe

Menu
Toolbar
Tabs
Text Editor
Message Area
Text Area
Untuk
keterangan lebih
jelas, user bisa
mempelajari
beberapa
kegunaan PDE
seperti menu
File, Edit,
Sketch,Tools, dan
Help.
Pada menu:
Help ->
Environtment

 Dalam Processing struktur program dapat
dibuat dalam tiga tingkat kompleksitas:
- Mode Statik.
- Mode Aktif.
- Mode Java.

 Mode Statik digunakan untuk membuat gambar
statik.
 Contoh berikut menggambar sebuah segi empat
kuning di layar.
size(200, 200);
background(255);
noStroke();
fill(255, 204, 0);
rect(30, 20, 50, 50);

 Mode Aktif menyediakan bagian setup() opsional yang
akan berjalan ketika program mulai berjalan.
 Bagian draw() akan berjalan selamanya sampai
progam dihentikan.
 Contohnya menggambar segi empat yang mengikuti
posisi mouse (disimpan dalam variabel mouseX dan
mouseY).

• Contoh segi empat yang mengikuti posisi mouse
void setup() {
size(200, 200);
rectMode(CENTER);
noStroke();
fill(255, 204, 0);
}
void draw(){
background(255);
rect(width-mouseX, height-mouseY, 50, 50);
rect(mouseX, mouseY, 50, 50);
}

 Mode ini memungkinkan menulis program Java secara
lengkap.
 Salah satu caranya adalah dengan mengimport
Processing library (lokasinya: Processing-
1.1libcore.jar) ke dalam tool program Java itu sendiri.
Misalnya bisa menggunakan tool NetBeans.
 Misalkan ingin juga mengintegrasikan dengan
OpenGL library, user juga dimungkinkan untuk meng-
import-nya ke dalam tool program Java tersebut.
Lokasinya:
- Processing-1.1librariesopengllibraryopengl.jar
dan
- Processing-1.1librariesopengllibraryjogl.jar

Contoh program yang diintegrasikan dengan Netbeans
package letsp5;
import processing.core.*;
public class Main extends PApplet{
public Main(){
}
public static void main(String[] args) {
PApplet.main(new String[] {"letsp5.Main"});
}
public void setup(){
// Set the size of the window
size(200,200);
}
public void draw(){
background(255);
// Body
stroke(0);
fill(175);
rectMode(CENTER);
rect(mouseX,mouseY,50,50);
}
} ismailadha@rocketmail.com

 Untuk mode statik sangat direkomendasikan bagi
pemula.
 Untuk mode aktif, dianjurkan agar struktur penulisan
kode program lebih terstruktur dan rapi.
 Untuk mode Java, diperuntukkan bagi Java advance
programmer.

 User bisa mempelajari perintah-perintah bahasa
Processing secara lengkap pada menu:
Help -> Reference
 Atau bisa membaca buku-buku berikut ini:
- “Learning Processing - A Beginner’s Guide to
Programming Images, Animation, and Interaction” by
Daniel Shiffman.
- “Processing - A Programming Handbook for Visual
Designers and Artists” by Casey Reas & Ben Fry.
- “Algorithms for Visual Design Using the Processing
Language” by Kostas Terzidis.
- “Processing Creative Coding and Computational Art” by
Ira Greenberg.

 Dapat mengaplikasikan dasar-dasar teori komputasi
grafis dengan cepat dan mudah tanpa harus
mempelajari bahasa pemrograman dari awal.
 Bisa diterapkan untuk Pengolahan Citra Digital.
 Bisa dijadikan sebagai alat percobaan, dasar
pemodelan, dan sketsa grafis sebelum
diimplementasikan ke dalam project sebenarnya.
 Dapat meningkatkan skill komputasi grafis.
 Bisa diintegrasikan dengan pemrograman Java.
 Sebagai wadah untuk menyalurkan bakat seni dan
imajinasi.

 Kunjungi: http://processing.org/
 Forum umum & daftar koleksi hasil karya dari
beberapa Universitas di dunia:
http://www.openprocessing.org/collections/

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