Processing 1.0 - Processing Discourse - processing on the iphone

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processing on the iphone (Read 15390 times)

processing on the iphone
May 31^st, 2008, 1:14pm

I was as impressed with the Processing.js implementation by John Resig as everyone else. And I naturally looked into the code to figure out how he had managed to do it. As he explains on his site, its all built around the browser canvas-object, and specifically the CanvasRenderingContext2D -object.

http://www.whatwg.org/specs/web-apps/current-work/multipage/section-the-canvas.html#canvasrenderingcontext2d

I had a look at the specification for the context object and the methods that Processing.js are using and realized that there were only about 8-10 methods needed.

So, I downloaded the JavaScript engine SpiderMonkey from Mozilla. With some inspiration from the Jiggy-project I configured and compiled it for the iphone. Then hooked it up with Processing.js, and wrote my own version of the context-object using OpenGL ES.

During this process I had to rewrite parts of Processing.js in ObjC for performance reasons.

Results? A hack of processing running on the iPhone with reasonable speed. I have uploaded a short video on youtube here: http://www.youtube.com/watch?v=0UN2iYrZmEY

Examples shown are StoringInput, BouncyBubbles (changed to use iphone accelerometer) and Substrate.

I will not be able to publish the code at the moment since it is built using apple code that is under NDA. Furthermore, it is really a hack, and would not be ready to meet the real world. Many things are not complete and the visual output is similar but not the same as in "real" Processing.

mattias ljungström

watz

Re: processing on the iphone
Reply #1 - Jun 1^st, 2008, 6:47am

Impressive. Would've been even nicer if it was the actual Java-based Processing and not the Javascript version. I made a MIDP applet for Nokia Trend Labs last year. I considered using Mobile Processing, but it was easier to use pure Java with Nokia's mobile device emulator.

The iPhone would be an attractive delivery platform indeed, I'm looking forward to what kind of art-related hacks will come out of the public SDK. Apparently, Sun has vowed to put Java on the iPhone, let's keep our fingers crossed.

marius watz // unlekker // code & form // Generator.x

v8media YaBB Newbies Offline Posts: 3 WA	Re: processing on the iphone Reply #2 - Oct 11^th, 2008, 3:32am Just curious if the specific code you were using is still under NDA? Or if it's possible to share now? Definitely fun stuff! Ian

julienb YaBB Newbies Offline Posts: 25	Re: processing on the iphone Reply #3 - Oct 24^th, 2008, 10:36am any informations about mobile.processing on iPhone ?

Oni YaBB Newbies Offline Posts: 6	Re: processing on the iphone Reply #4 - May 7^th, 2009, 5:08am Would it not be a reasonable idea to recreate the API in objective C using the methods as they exist now? On a jailbroken iPhone, you can indeed install Java and all the libs needed. But i doubt one could take advantage of the GPS, the Tilting and all the other fun thigns you'd want to do using the hacked Java API

Oni YaBB Newbies Offline Posts: 6	Re: processing on the iphone Reply #5 - May 7^th, 2009, 5:10am It seems that theres plenty of nice things on the default API such as OpenGLES and CoreGraphics. Would it be possible to re-create processing using these libraries and making a move from Java completely?

Stephen Williams YaBB Newbies Offline Posts: 39 Graz, Austria	Re: processing on the iphone Reply #6 - Jun 28^th, 2009, 3:05am It seems that with the XMLVM project it should be possible to cross compile Processing into Objective C for the IPhone. I'm not sure how the reflection in PApplet will be handled but compiling a Swing app using PGrapics should be doable.
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degafolio YaBB Newbies Offline Posts: 3 Barcelona	Re: processing on the iphone Reply #7 - Jul 20^th, 2009, 1:43pm nice job!

MORPHOCODE YaBB Newbies Offline Posts: 7	Re: processing on the iphone Reply #8 - Aug 3^rd, 2009, 9:31am It will be great to have processing on iPhone An Objective C port sounds good to me.

theta YaBB Newbies Offline Posts: 3	Re: processing on the iphone Reply #9 - Oct 18^th, 2009, 3:59pm Noob-question - What would be the process for porting processing.org libraries to Objective-C?
	The best way to predict the future is to invent it

PhiLho YaBB Moderator Offline Posts: 4190 Near Paris (France)	Re: processing on the iphone Reply #10 - Oct 19^th, 2009, 2:38am You would need to do a complete rewrite... Either using the source code as it is available (can be useful for some algorithms like filter() ones), or just doing like many Processing implementations, taking the API and rewriting it.

RobotGrrl YaBB Newbies Offline Posts: 3	Re: processing on the iphone Reply #11 - Dec 29^th, 2009, 9:47am Can the code be posted now, so others can play with it? (The NDA was lifted ages ago...)

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