Gravity Sketch iOS Trailer from GravitySketch on Vimeo.
TWO YEARS AGO London startup Gravity showed off a wild concept for creating 3-D forms using augmented reality software. In the demo, a designer wearing AR glasses wielded an Arduino-connected pad and pen. As he drew on the plastic pad, his drawing appeared as a 3-D object that could be viewed and manipulated almost as though it was floating in air. The compelling concept hinted at how augmented (and virtual) reality could someday be as natural a creative tool as basic pen and paper.
Source: App Makes Designing in 3-D as Easy as Using Microsoft Paint