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- 91-07/unc.at.siggraph
-
-
- The Computer Science Department at UNC-Chapel Hill will be a major
- exhibitor at Siggraph 91's "Tomorrow's Realities Gallery" next week
- in Las Vegas. If you attend Siggraph, you are invited to stop by
- the booth. This article describes the demo procedures, the demos,
- and the equipment at UNC's booth.
-
- =====================================================================
- == D E M O P R O C E D U R E ==
- =====================================================================
-
- Siggraph has approved several demos, which are described briefly in
- the next section. Each demo lasts about four minutes, so we will
- have a ticket dispenser to avoid generating long lines. Take a ticket,
- mill around the showroom floor, and return in time to hear your number
- called. If ticket-holders before you miss their turn, your number
- will be called sooner; as a result, there is no guarantee which
- particular demo you will get. The gallery hours during Siggraph are
- indicated in the schedule below.
-
- 9 10 11 Noon 1 2 3 4 5 6 7 8
- Sun 7/28 ------
- Mon 7/29 ----------------------------
- Tue 7/30 -------------------------------
- Wed 8/01 -------------------------
- Thu 8/02 -------------------------------
- Fri 8/03 ----------------
-
- The basic plan of the demos is simple. You don the head-mounted
- display. As you turn your head or move about, the scene you see
- changes to present an illusion of reality. You might use a 3d input
- device to interact with the virtual environment. And you might hear
- audio feedback depending on where you are in that environment.
-
- There will be handouts available with details about the demos and
- the machinery. If you read them first, you can spend more of your
- demo time using the application, and less time needing help.
-
- =====================================================================
- == D E M O S ==
- =====================================================================
-
- Radiation Therapy Treatment Planning
-
- A virtual patient lies on a virtual table. You can see through
- the patient's torso to the tissues beneath, and can grab and
- emplace radiation beams so that they destroy malignant cells
- without hurting healthy ones.
-
- Flying Through Molecules
-
- This demo gives you and atom's-eye view of several molecules.
- You can fly around them at variable rates of speed.
-
- 3dm: A Two-Person Modeling System
-
- You share this environment with a trained user who, as the expert
- modeller, builds 3-dimensional objects that you can explore. The
- modeller selects tools from an iconic virtual menu in order to
- create and edit objects.
-
- Mountain Bike
-
- A physical bicycle acts as an input device for this application.
- As you pedal the bike, you ride through a virtual landscape
- furnished with several animated surprises.
-
- Virtual Pilot
-
- You fly over an endless textured landscape, navigating by looking
- in the direction you want to go.
-
- Architectural Walkthrough
-
- Using a treadmill as the input device, you walk through a house.
- This demo features audio cues, illumination by radiosity, and
- many textured surfaces in order to enhance realism.
-
- Another version of this demo uses a prototype tracking system
- (more details below) to let you explore a single room.
-
- =====================================================================
- == E Q U I P M E N T ==
- =====================================================================
-
- Pixel-Planes 5
-
- Pixel-Planes 5 is a custom graphics multicomputer. It consists
- of a host, dozens of graphics processors (GPs), and several
- pixel-oriented renderers, communicating over a ring network.
-
- Each GP (an i860) typically transforms and clips a portion of a
- database of 3-D objects, and sends instructions to the renderers.
- Each renderer is an array of 128x128 SIMD pixel processors with
- local memory. They execute instructions of the form
-
- [instruction, ABCDEF],
-
- where the processor for the pixel at screen-location (x,y) applies
- the instruction to the quadratic Ax + By + C + Dx^2 + Exy + Fy^2.
- A renderer can illuminate, shade, texture, and z-buffer a primitive
- at all its pixels in parallel.
-
- Existing applications demonstrate interactive radiosity,
- interactive volume-rendering, interactive procedural textures,
- interactive Mandelbrot and Julia sets, and Phong-shaded polygonal
- models tranformed and rendered at over 2 million polygons per
- second.
-
- Head-Mounted Display
-
- The head-mounted display is a piece of headgear with two TV
- screens, one for each eye. With a 3-D input device mounted on
- it, this display can show images that move as you move, creating
- the illusion that you are in a virtual world that the graphics
- engine renders. Current research at UNC has spawned another
- method of tracking the position and orientation of the headgear:
- the "Head-Tracker." This technology uses infrared emitters placed
- overhead, and multiple sensors on the headgear. The result is
- a larger physical volume of space that the user can move about
- in, and less lag in computing the user's position and orientation.
-
- ----------------------------------------------------------------------
- Disclaimer: This article is not an official publication of the
- University of North Carolina, nor of the Department of Computer
- Science.
-
- comp.graphics.research Administrivia to: graphics-request@scri1.scri.fsu.edu
-
-
- --
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