Down by the Lake

Exhibiting at Printed Electronics 2008

in
December 3, 2008
Printed Electronics 2008 Logo

I apologize for going a little quiet both here and on Twitter for the last couple of weeks. I've been preparing for the Printed Electronics USA 2008 conference, where I'll be exhibiting SonoPlot's Microplotter robots in booth 25. If you happen to be in San Jose at the show today, please stop by and say hello.

Molecules 1.3 submitted for review

in
November 12, 2008
Molecules icon

Earlier today, I submitted version 1.3 of Molecules for review in the iTunes App Store. The major new feature that this version adds is the ability to download custom molecular structures. For those of you who can't wait, the source code has been updated .

Again, I apologize for the delay in providing a new version. I'm working on a new iPhone application that I hope to unveil within the next couple weeks and it is taking most of my available time.

Read on for more information about this version.

Molecules in the Protein Data Bank newsletter

in
November 2, 2008
Molecules icon

Recently, I was given the opportunity to write an article about the educational applications of Molecules for the RCSB Protein Data Bank's fall newsletter. That article is now online, and I think it came out well. It's worth reading if you're interested in my thoughts about the scientific and educational applications of the iPhone / iPod Touch.

3-D rotation without a trackball

in
October 21, 2008
Trackball rotation sample

UPDATE 2: Perspective rendering has been added: see below for the details.
UPDATE: 3-D scaling using pinch gestures has been added: see below for the details.

Recently, Bill Dudney posted a sample iPhone application that used Core Animation and a concept called a trackball to rotate an object in 3-D space using a finger as input. I actually use a different method of rotation within Molecules, so I thought I'd modify his sample to use that rotation.

That modified example iPhone application can be downloaded here.

Read on for more detail on this rotation technique

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