Trying to create a lightpaint simulator with Processing (like the ones you'd do with a camera with the shutter open and some kind of light source). The result isn't really the best ever as the caps of the drawn lines overlap as they're continuously drawn and end up creating some undesired artifacts (barely seen on the compressed video), but it runs very smoothly - at around 60fps - and the result can still look pretty good.

Painted and captured in real time. Eventual frame drops are due to my HD struggling with fragmentation when saving the images.

Create your own! Full source and discussion (copy and paste the entire line):
processing.org/discourse/yabb_beta/YaBB.cgi?board=Programs;action=display;num=1213486518

July/2008