Cydrop is a custom AIR application built for live digital drawing.
In its inaugural flight, we had two artists each designing the side of a Scion xB in front of a live audience. Each artist drew on their own canvas, and the outputs were projected onto either side of the car.
It is built in Flash Actionscript 3 as an AIR application that runs on Mac, Windows and Linux. It currently uses a Wiimote and infrared devices (IR pen, spray can) to perform its magic.