Apple has filed a patent for their Stylus which can write in mid-air and also in any surfaces. The stylus would allow the users to write or draw doodles in mid-air.
The patent application describes the pen, which can be tracked and monitored by multiple dedicated sensors at the tip or the pen is tracked by motion and orientation sensors, a camera or ” An electromagnetic-or-Sound Based Triangulation Scheme”. That could mean that the sensors would be mounted in your computer which would track the motion and monitor the position of the stylus in 3D-Space.
The can be used to write text or generate 3D drawings. For example, you can generate a 3D-cylinder in mid air and the live preview will be show up on your computer screen.
This sounds as a virtual versions of handled 3D printers or to be specific the 3D Doodler. A 3D Doodler is a pen which creates 3D objects by melting Plastics (basically it’s a handheld 3D-printer).
The patented stylus breaks the limitation for users working on a 2D plane. And gives them more freedom to work on a three dimensional space.
The patent was originally filed in July 2016, and published in late January 2018.