I work at the Harvard lab mentioned in this article, and I wrote the software that was used to generate the header image. 3D printers are controlled in a langu

I work at the Harvard lab mentioned in this article, and I wrote the software that was used to generate the header image. 3D printers are controlled in a language called GCode (also used for CNC mills). I wrote a GUI that allows the end user to draw any path with a tablet (or mouse) and then have that converted to GCode. This enabled the researchers to print more complex objects, as they previously had to write their GCode by hand.