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#REDIRECT [[Processing#Processing.js]] |
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{{Infobox software |
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| name = Processing.js |
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| logo = |
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| author = [[John Resig]] |
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| developer = Processing.js team |
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| released = {{initial release|2008}} |
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| latest release version = 1.3.0 |
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| latest release date = {{release date|2011|8|24}} |
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| latest preview version = |
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| latest preview date = |
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| programming language = [[JavaScript]] |
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| status = Active |
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| genre = [[Web application framework]] |
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| license = [[MIT License|MIT]] |
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| website = http://processingjs.org/ |
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| size = {{Nowrap|61 [[Kilobyte|KB]] (gzipped)}} / {{Nowrap|209 KB (production)}} / {{Nowrap|754 KB (development)}} |
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}} |
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'''Processing.js''' is a [[JavaScript]] port of [[Processing (programming language)|Processing]], a programming language designed to write visualizations, images, and interactive content. It allows web browsers to display animations, visual applications, games and other graphical rich content without the need for a [[Java Applet]] or [[Flash plugin]]. |
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{{r from merge}} |
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Processing.js uses JavaScript to render 2D and 3D content on the HTML [[canvas element]], and is supported by browsers that have implemented this element (Currently the latest versions of Mozilla [[Firefox]], [[Opera (web browser)|Opera]], [[IE9]], [[Safari (web browser)|Safari]] and [[Google Chrome]]). |
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{{r to section}} |
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The development of Processing.js was picked-up by students at [[Seneca College]] after its initial release on 2008. A team of students finished the port of Processing.js, fixing more than 900 bugs, shipping 12 releases, and creating a vibrant community in the process. The project was done through a partnership between the [[Mozilla Foundation]] and [[Seneca College]], led by David Humphrey, Al MacDonald, and Corban Brook. The students continue to maintain the project today. |
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==Use== |
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The Processing.js syntax is almost identical to that of the Processing language, a <code>setup()</code> function is used to define general visualization properties like canvas size, frame rate and other variables, and the <code>draw()</code> function controls the behavior of each frame in the animation. |
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The Processing.js library can be included in the head section of a web page as a single JavaScript file: |
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<source lang="html4strict"> |
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<html> |
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<head> |
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<script type="text/javascript" src="processing.js"></script> |
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</head> |
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</source> |
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A <code>canvas</code> element is declared inside the body, with a <code>data-processing-sources</code> attribute, specifying the location of an external file holding the Processing code: |
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<source lang="xml"> |
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<canvas data-processing-sources="example.pde"></canvas> |
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</source> |
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Any extension can be used in the external file, for example the .pde extension used by the Processing language sketch files. |
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<source lang="javascript"> |
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/* example.pde */ |
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// The statements in the setup() function |
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// execute once when the program begins |
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void setup() |
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{ |
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size(200, 200); // Sets the canvas size to 200 by 200 pixels |
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stroke(255); // Set line drawing color to monochrome white |
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frameRate(30); // Set up draw() to be called 30 times per second |
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} |
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float y = 100; |
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// The statements in draw() are executed until the |
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// program is stopped. The function is called as many |
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// times per second as the frameRate. If no explicit |
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// rate is set, this is 45 times per second. |
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void draw() |
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{ |
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background(0); // Set the background to monochrome black |
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y = y - 1; |
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if (y < 0) { y = height; } |
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line(0, y, width, y); // draw a horizontal line at height y |
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} |
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</source> |
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==References== |
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{{Refbegin}} |
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*{{citation |
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| first1 = Andrew |
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| last1 = Glassner |
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| title = Processing for Visual Artists: How to Create Expressive Images and Interactive Art |
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| date = August 9, 2010 |
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| edition = 1st |
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| publisher = A K Peters/CRC Press |
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| pages = 955 |
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| isbn = 1568817169 |
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| url = http://www.crcpress.com/ecommerce_product/product_detail.jsf?isbn=9781568817163 |
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}} |
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*{{citation |
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| first1 = Casey |
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| last1 = Reas |
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| first2 = Ben |
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| last2 = Fry |
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| title = Getting Started with Processing |
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| date = June 17, 2010 |
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| edition = 1st |
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| publisher = Make |
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| pages = 208 |
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| isbn = 144937980X |
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| url = |
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}} |
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*{{citation |
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| first = Joshua |
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| last = Noble |
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| title = Programming Interactivity: A Designer's Guide to Processing, Arduino, and Openframeworks |
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| date = July 21, 2009 |
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| edition = 1st |
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| publisher = [[O'Reilly Media]] |
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| pages = 736 |
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| isbn = 0596154143 |
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| url = http://oreilly.com/catalog/9780596154141/ |
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}} |
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*{{citation |
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| first = Kostas |
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| last = Terzidis |
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| title = Algorithms for Visual Design Using the Processing Language |
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| date = May 11, 2009 |
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| edition = 1st |
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| publisher = [[John Wiley & Sons|Wiley]] |
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| pages = 384 |
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| isbn = 0470375485 |
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| url = http://www.wiley.com/WileyCDA/WileyTitle/productCd-0470375485.html |
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}} |
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*{{citation |
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| first1 = Casey |
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| last1 = Reas |
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| first2 = Ben |
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| last2 = Fry |
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| first3 = John |
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| last3 = Maeda |
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| title = Processing: A Programming Handbook for Visual Designers and Artists |
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| date = September 30, 2007 |
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| edition = 1st |
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| publisher = The MIT Press |
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| pages = 736 |
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| isbn = 0262182629 |
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| url = http://mitpress.mit.edu/catalog/item/default.asp?ttype=2&tid=11251 |
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}} |
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*{{citation |
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| first = Ben |
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| last = Fry |
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| title = Visualizing Data |
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| date = January 11, 2008 |
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| edition = 1st |
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| publisher = [[O'Reilly Media]] |
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| pages = 382 |
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| isbn = 0596514557 |
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| url = http://oreilly.com/catalog/9780596514556/ |
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}} |
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*{{citation |
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| first = Ira |
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| last = Greenberg |
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| title = Processing: Creative Coding and Computational Art (Foundation) |
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| date = May 28, 2007 |
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| edition = 1st |
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| publisher = friends of ED |
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| pages = 840 |
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| isbn = 159059617X |
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| url = http://friendsofed.com/book.html?isbn=159059617X |
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}} |
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*{{citation |
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| first = Daniel |
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| last = Shiffman |
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| title = Learning Processing: A Beginner's Guide to Programming Images, Animation, and Interaction |
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| date = August 19, 2008 |
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| edition = 1st |
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| publisher = Morgan Kaufmann |
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| pages = 450 |
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| isbn = 0123736021 |
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| url = http://www.learningprocessing.com/ |
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}} |
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{{Refend}} |
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==External links== |
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* [http://processingjs.org/ Official Website] |
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* [http://wiki.mozilla.org/Education/Projects/ProcessingForTheWeb Processing for the Web (POW) project] |
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[[Category:Free development toolkits and libraries]] |
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[[Category:JavaScript libraries]] |
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[[fr:Processing.js]] |
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Latest revision as of 23:58, 22 September 2022
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