This experimental work from around 2001 was part of a Year of the Artist residency at LUTCHI, the HCI section of Loughborough University's Computer Science department. There were no plans to exhibit it without creating a portable version from the original idea.
The code was written in C++, calling OpenGL and using Inventor libraries on a Silicon Graphics Onyx running IRIX. We considered porting it to a PC or OS X.
The EPROM infra-red sensors are simple binary switches - breaking a beam (white lines in the middle image) triggered a signal that our software converted to a live dynamic 3D visual representation of movement across the enclosed space.