The
Evolution Door is a 2012 development and Klemens Torggler's best-known work. Unlike his previous kinetic works, this object remains on a single level and unfolds into a third dimension as it moves.
Klemens Torggler's The Evolution Door
The Evolution Door is connected to the door frame by
two pivots — at the top and bottom — and consists of four triangular “flip-panels.” When movement is initiated, the four sections collapse in on themselves and rotate 90 degrees before straightening back into a rectangle.
Door opening process
The door consists of two square sections, each divided in half along the diagonal. The diagonals are where two triangular panels meet, connected by a mechanism resembling a piano hinge so that each square can fold as the door moves.
Each part of the rectangle of the door must be square; in other words, the door's width must be half of the door's height.
(...)
The whole code of this is
here
Klemens Torggler's door implemented, each viewport of Rhino