The NAVE

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The NAVE

• Non-expensive Automatic Virtual Environment

Andy Quay Associate Director Digital Worlds
Institute University of Florida
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Holodeck

• A "smart" virtual reality system - a technology
  that combines the transporter, replicator, and
  holographic systems. The programs, projected via
  emitters within a specially outfitted but
  otherwise empty room, can create both "solid"
  props and characters as well as holographic
  background to evoke any vista, any scenario, and
  any personality -- all based on whatever real or
  fictional parameters are programmed.

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Holodeck
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Holodiction

• Literally, "holodeck addiction" -- the condition
  of preferring Holographic fantasies to reality

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NAVE - What is it?

• Non-expensive Automatic Virtual Environment
• multi-screen, multi-user, stereoscopic,
  multi-sensory virtual environment
• projected stereoscopic environment as an
  alternative to head-mounted displays

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NAVE The Room

• CSE room 413

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NAVE - Experience

• Provides the sense of being there
• Story
• Interactivity
• Senses aural, visual (, touch, smell)
• Not just a theater

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Our NAVE Features

• Multi-user
• Three screen environment
• Low cost
• Stereoscopic or mono
• Surround audio (5.1)
• Rumble
• Joystick (or any common device)

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NAVE Possible Improvements

• Senses
• Sensors
• Content

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Senses

• 3D sound
• Temperature
• Wind
• Touch
• Taste
• Smell

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Sensors

• Non-encumbering tracking
• Magnetic, Ultrasonic, Inertial, Visual
• Orientation trackers
• Positional trackers
• Wide area trackers
• Hybrid tracking

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Input

• Data Gloves
• Tactile input devices
• Haptic gloves
• The Phantom
• Haptic Pads
• Gaming devices
• Joystick
• Steering Wheel
• Game pad
• Visual
• Gaze
• Gesture

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Content

• Museum and cultural exhibits
• Entertainment
• Virtual heritage (UF history)
• Art installations
• Multisensory experiments
• Visualization
• Oil and gas planning
• Medicine
• Architecture
• Weather
• Virtual Sets

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Case Study Atlanta Olympics

• 1990 bid by city of Atlanta
• Hi-tech virtual tour of city
• Many IOC members had never been to Atlanta
• Most computer illiterate (phobia)
• Need to convey a sense of readiness and know-how

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Case Study Atlanta Olympics
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Case Study Atlanta Olympics

• Three screen projection display
• Multi-user
• Intelligent music
• Smart narration
• Interactivity - Touch model of GT campus
• Film/video
• Story based
• Customized experience for each user

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HOW TO VIEW A STEREOSCOPIC IMAGE Cross-Eye

• Cross your eyes so that your right eye sees the
  right image at the same time your left eye sees
  the left image.

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HOW TO VIEW A STEREOSCOPIC IMAGE Parallel View
Method

• Right eye is over the right image and your left
  eye is over the left image

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HOW TO VIEW A STEREOSCOPIC IMAGE Anaglyph Method

• Uses color to encode the right and left image
  pairs
• Special pair of glasses with color filters over
  each eye
• Sacrifices the color data and image intensity

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HOW TO VIEW A STEREOSCOPIC IMAGE Squished
Side-By-Side Method for Lenticular Displays

• Lens arrays to help guide the right and left
  images into the correct eye of the viewer
• Do not require the use of glasses
• Head must be in a specific location in order to
  view the image

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HOW TO VIEW A STEREOSCOPIC IMAGE Polarized 3D
Glasses

• Typically polarized lenses installed on two
  projectors
• Each lens polarizes at opposing 45 degree angles,
  same in the glasses
• Light waves can only pass through a polarized eye
  glass lens polarized at the same angle
• Light coming from the projector oriented at -45
  degrees will be seen by one eye, and the light
  coming from the other projector oriented at 45
  degrees will be seen by the other eye

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HOW TO VIEW A STEREOSCOPIC IMAGE Shutter Glasses

• Rapidly switch images on monitor between the
  right and left views
• Special pair of glasses must be used to view
  these images

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HOW TO VIEW A STEREOSCOPIC IMAGE Line Alternate
methods for Shutter Glasses

• Right and left images are interleaved on a
  line-by-line basis
• Resulting 3D image is flicker free since very
  high scan rates can be reached
• Special pair of glasses must be used to view
  these images

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Simple Virtual Environments (SVE) Toolkit

• a device-independent library that provides
  mechanisms and software tools for VE applications
• rapid prototyping of virtual worlds

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SVE Examples
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SVE Examples
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SVE Examples
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SVE
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SVE C Code Example

• include "sve.h"
• main (int argc, char argv)
• SVE_config config SVE_NORMAL
• SVE_init("Example1 (sve)", config, argc,
  argv)
• if (!SVE_loadWorld("example1.world"))
• printf("Error occured during
  SVE_loadWorld, exiting.\n")
• SVE_done()
• SVE_beginEventLoop()
• SVE_done()

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SVE Example World Description file

• Simple Virtual Object File Format version 2.0
• number of objects 1
• object name meadow
• primitives file plane.obj
• transformation matrix
• 1 0 0 0
• 0 1 0 0
• 0 0 1 0
• 0 -1 -1 1
• other attributes 0
• number of children 0

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SVE Example Object Description file

• Object File Example
• Simple Virtual Primitive File Format version 1.1
• number of components 5
• component 1 type light
• Data of component 1
• no of attributes
• 2
• color 1.0 1.0 1.0
• position 0.0 5.0 -10.0
• component 2 type polyhedron
• Data of component 2
• no of vertices
• 8
• vertices x y z
• 0 0 0
• 0 1.0 0
• 1.6 1.0 0

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Polytrans Translation Tool

• 3d model/NURBS/CAD/animation translation,
  optimization and viewing
• Converts every aspect of a 3d model, including
  all shading parameters, texture mapping
  coordinates, texture map information and (for
  selective converters) animation data
• http//www.okino.com/