Sliding, rotating, automatic, hinged. We thought we had a pretty firm grasp on the types of doors that exist in the world. How wrong we were.
"I can't stop watching this door open and close," wrote i09 Friday. We second that.
Dubbed the "Evolution Door," the clever geometric structure made its YouTube debut last June. (Watch the video below.) At the time, Torggler described his invention as a "flip-panel door." The artist has also said that the door has "soft edges" (for wayward fingers) and is "absolutely safe."
The "Evolution Door" is just one of several unorthodox doors designed by Torggler. All his doors are "based on rotating squares," his website reads, adding: "The special construction makes it possible to move the door sideways without the use of tracks. This technical trick opens up new applications for the door."
Watch a video of Torggler's "Evolution Door" in action here: