Evolution Door is a 2012 development and Klemens Torggler's best known work. Unlike previous kinetic works, this object is only on one 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 with
two pivots — at the top and bottom — and consists of four triangular “flip-panels.” When movement is instigated, the four sections collapse in on themselves and rotate 90 degrees before straightening back up 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 with something like a piano hinge so that each square can fold as the door moves.
And 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