In short, you need a very high frame rate to make it look smooth. 120 is a good number. I’ve tried on 4 different platforms, Flash, JavaScript, Processing and OpenFrameworks. Needless to say, OpenFrameworks can do it without a sweat. Javascript’s result is almost as good as OF in Firefox, Chrome and Safari (IE not tested). Flash looks good in stand alone player but failed miserably when embedded into browsers. Processing or Java did a bad job in this. It only renders somewhat OK in OPENGL mode but failed in all other modes. When it’s embedded into an Applet, it can’t even produce 60 fps.

Flash | Javascript | Processing | OpenFrameworks (Mac Download)

More details (Based on my own understanding. May not be true)

The problem is because the animation and the display screen have different frame rates. What’s worse, the animation doesn’t get rendered at a consistent frame rate. Which means even you set the animation’s frame rate as the same as the display you still won’t get a smooth scrolling because sometimes the animation is rendered a bit slower and some frames are dropped.

The story behind

As a web developer, I often need to resize images into a specific dimension to suit the website’s design. I used to resize images in Photoshop but I find it tedious to record actions again and again for different websites. Besides that, Photoshop is not cheap and not everyone has a (legal) copy. I tried some existing software but none of them satisfied me. Therefore, I decided to write one myself .

I’ve been searching and testing with many different platforms to develop it, C++, Java, Python and Perl. None of the above can achieve what I wanted, a single executable file without any extra libraries or dll files, no installation required. Finally I landed on PHP and I used bamcompile to generate an executable file. I still have troubles to get a Mac or Linux version of any PHP compiler to work. I may re-use my C++ code for Mac in the future and wrap it up as an .app.

By default, PS3 Eye is not supported by Windows or Mac OSX. Luckily there are drivers ready for you to grab. For PC, use this driver. For Mac OSX, use this driver.

To get PS3 Eye working for openframeworks in windows, you need to edit one line in file “ofVideoGrabber”. The solution is found in this thread, changing

bool bOk = VI.setupDevice(device, width, height);

into

bool bOk = VI.setupDevice(device, width, height, VI_COMPOSITE);

Remember to clean the project first and compile it to reflect the changes.

For Mac OSX, all you need to do is to copy “maccam.component” into “Library\QuickTime\”, no changes on the source code needed.

Enjoy!

Please be patient with my slow server. Thank you!

Download: PC & Mac

Download Here!

To work around the problem without touching 3D rotations, you can create an empty object3D as C and place it along vector BA and call A.lookAt(C). Vector BA can be calculated as {A.x-B.x, A.y-B.y, A.z-B.z} and the position for C should be {BA.x*1.1+A.x, BA.y*1.1+A.y, BA.z*1.1+A.z}. The number 1.1 is just an arbitrary number. Any number greater than 1 will do the trick.

I’ve done this piece of ugly thing as a demonstration and the source is here.