view applet, download source

Above is a new Box2D Processing example that demonstrates two key aspects of working with Box2D:

1) Though tempting as it may be, you cannot set the location manually of an object in the Box2D world and expect the physics to continue to work. Box2D doesn’t understand teleportation (which is the equivalent of telling an object to disappear and then reappear at a different pixel). Rather, if you want to move an object manually, you can attach a joint to the object and tug it around. This way, you control its motion and yet it still lives within the world of Box2D physics. The example demonstrates how this is done with a MouseJoint. The object moves according to an perlin noise algorithm (unless the mouse is pressed in which case it follows the mouse).

2) The example also demonstrates how to use Box2D’s ContactListener to know when objects have collided. The circles turn red when they encounter the square.

It’s my intention to eventually add this example with further explanation to the Box2D tutorial.

Building off of last week’s Box2D and Processing post, I have now posted a short tutorial about the physics package in toxiclibs. The force directed graph example is a simplified version of toxi’s wonderful fidgen project.

Link: http://www.shiffman.net/teaching/nature/toxiclibs/

I’m pleased to announce I’ve published a first draft of a tutorial about using Box2D in Processing.

Tutorial: http://www.shiffman.net/teaching/nature/box2d-processing/
Google code repository: http://code.google.com/p/pbox2d/

I’m struggling here to figure out whether I’m (a) creating a Processing Box2D library or (b) simply creating a tutorial and set of examples piggybacking off of JBox2D. For now, I’m doing a little bit of both. The library is just a few helper functions, but the examples require you to dig into actual Box2D code. These examples aren’t nearly as comprehensive as what you’ll find in the JBox2D demos. It’s my goal, however, to make the material accessible and easy to use. Hopefully, with some feedback and more time, I’ll be able to publish a more sophisticated library and thorough suite of example. Who knows, maybe no one will ever need any of my previous Nature of Code tutorials any more!

Next up, I’m planning on creating a few simple examples that use the fantastic and awe-inspiring toxiclibs.

For anyone who missed it, here’s a video of the 2009 Big Screens show at IAC. Thanks to Lina Giraldo for editing it together, and a great group of student volunteers who did the shooting.

It seems like every day I hear about another Processing book being published (or soon to be published). Joshua Noble’s recent book includes Processing along with openFrameworks and Arduino: Programming Interactivity: A Designer’s Guide to Processing, Arduino, and Openframeworks. Processing for Visual Artists is another new book I know little about, but am excited to check out. And I’m particularly thrilled for the upcoming Getting Started with Processing. An inexpensive, short beginner’s guide is a big gaping hole in the landscape of Processing books and this book should fill it nicely. It’s really what I imagined Learning Processing: A Beginner’s Guide to be, but the book ballooned a bit into a more comprehensive beginner textbook. Hopefully Casey and Ben’s new book can introduce a lot of new people to Processing.

Finally, Ira Greenberg’s new book The Essential Guide to Processing for Flash Developers recently came out. And if you didn’t notice, I wrote the forward! Which, strangely enough, means that my name is somehow on the cover along with Ira’s. Which is pretty crazy considering that I only wrote a few short paragraphs.

Oh and I still am working on a The Nature of Code book, with more PDF chapters to be available soon!

Please RSVP to: itp.rsvp@nyu.edu

More info here: http://itp.nyu.edu/bigscreens2009/

ITP recently celebrated its 30th anniversary with a weekend of events and activities compressing the entire ITP experience into 3 days. Saturday culminated with a gala event at IAC, celebrating the launch of the Red Burns Scholarship Fund. I worked with a group of ITP students and staff to develop content displayed on IAC’s 120 by 12 foot video wall. Everything you see below was made with Processing and the most pixels ever library.

Thanks to amazing and dedicated group who pulled all of this off (under an incredibly tight and stressful timetable): Xiaoyang Feng, Meredith Hasson, Juri Imamura, Brian Kim, Matt Parker, Jeremy Rotsztain, Tim Szetela, Carolina Vallejo, Elie Zananiri.

The videos are just slices of the original 8160×768 pixel design (as seen in the flickr screenshots). Hopefully I can find some nice images or video from the actual event to post here soon as well.

ITP 30th Anniversary Timeline Documentation from shiffman on Vimeo.

ITP 30th Anniversary Timeline Documentation from shiffman on Vimeo.

ITP 30th Anniversary Floorplan Documentation from shiffman on Vimeo.

ITP 30th Anniversary Tweets Documentation from shiffman on Vimeo.

Yesterday, Rhizome published a short interview I conducted with Casey Reas and Ben Fry about the past, present, and future of Processing.

First, a hearty thank you to Golan Levin who did a tremendous job planning and organizing the mind-bending experience. Some highlights:

Oxford Project Part III — Thanks to the ever ebullient Ira Greenberg and Miami University for sponsoring (and the Studio for Creative Inquiry @ CMU for giving us space), we were able to convene before the main festivities began to give Processing a push towards some number past 1.0. Stay tuned for exciting improvements in Processing’s video and OPENGL libraries as well as to the IDE itself.

Saturday was a day full of workshops. In the morning, I attempted to teach an entire semester of ICM in under three hours, followed by an afternoon mix of topics related to physics simulation and image processing.

Sunday was the day to end all days with the lineup of speakings including lead developers of the languages / environments: Alice, Pure Data, Scratch, Hackety Hack, Processing, Max/MSP/Jitter, vvvv, ExtendScript, and openFrameworks. Some highlights within highlights here were Luke Dubois’ demo of “what is known in the biz as random atonal crap” and Sebastian Oschatz’s boy band metaphor for multi-screen setups (one that I really need to take a look at more closely as we develop “most pixels ever” at ITP.) Videos of all the Sunday talks will eventually be posted at vimeo/artandcode.

On Monday, I was lucky to have the chance before heading home to catch the work of Casey Reas and Marius Watz at the Pittsburgh Center for the Arts.

Of course, all of this was really just an excuse for a nice group photo.

 

 

This is long overdue, here are some photos and video from my class’ winter show on the IAC video wall. Six of the projects were made in Processing, three in openFrameworks, and three were pre-rendered video projects (synced using openFrameworks).

Big Screens ITP Show at IAC from shiffman on Vimeo.