Todd Margolis

Virtual Reality Installations

"Virtual reality promises a kind of transcendence of the limits of physical reality."
-Frank Biocca, Taeyong Kim, Mark R. Levy: Communication in the Age of Virtual Reality

Virtual Reality Installations


Role: Research Programmer

Varrier is a head-tracked autostereo virtual reality display. Varrier was developed as a part of our efforts to create a "freer VR" experience; one that affords users an effective sense of immersion without the burden of special glasses, wires or controllers where you can simply walk into a room and be fully immersed in an interactive 3D world.

In the Varrier method, a virtual barrier screen is created simulating the physical barrier screen and placed in the virtual world in front of the projection plane. An off-axis perspective projection of this barrier screen, combined with the rest of the virtual world, is projected from at least two viewpoints corresponding to the eye positions of the head-tracked viewer.

My role as a research programmer working on Varrier at Electronic Visualization Laboratory (EVL) was to co-create the initial varrier algorithm with Dan Sandin. I wrote most of the first software applications to test and use the Varrier system. I also had a lead role in developing the single display and 35 panel tiled display hardware prototypes. Additionally, I assisted with writing grant applications and reviews to help fund the project.

The Varrier system was created by EVL at UIC with support of the NSF, DoE and NTT


Linked Media


Cylindrical Varrier - Autostereoscopic Tiled Display


SIGGRAPH 2005, Los Angeles, CA

IEEE VR 2004, Chicago, IL

SPIE Photonics West '01, San Jose, CA