Dorian Miller

1
Virtual Reality Quest

• Dorian Miller
• Comp 239 Dec 16, 2002

2
Walking in large areas

• Walking natural way to explore area
• Lab space smaller than virtual environment
• Versaille, Hall of Mirrors
• Appreciate large spaces by walking

3
Redirected walking

• Requirements
• Predetermined path
• _at_ Waypoints person distracted rotates head

4
Virtual guide

• Dragon avatar as guide
• Interaction extinguish fire
• Guides person along path
• Occupies person at way points

5
Lessons Learned

• Designing virtual environments
• Avatars
• Visual
• Audio

6
Virtual Guide

• Avatar guide meets RDW requirements
• Guide person along predetermined path
• Person engaged, rotate world unnoticed
• Interaction distracts person
• Exploit to make modifications
• Sensitive balance to focus persons attention

7
Design virtual environment

• Reference points provide orientation
• Useful after distraction of guide

Gateway marks start
8
Audio immersion

• Audio enhances experience
• Fierceness of dragon enforced by sound
• Fire, movement, roar
• Audio prevents person hearing real world sound

9
Implementation

• Redirected walking rotation
• Control of guide avatar

10
Rotating virtual world

• Rotate about persons head
• M T(-x,-y,-z)R(0,0,r)T(x,y,z)

y
Person (x,y,z)
z
x
11
Redirected walking rotation

• Transform between world (X) virtual (U)
  coordinates M and M-1
• New M
• New Inverse M

X U MT(1)R() T(2)
T(1) 1R()-1T(2) -1M-1X U
12
Control of guide avatar

• State Machine for guides path
• Ensure smooth path between state transitions
• Jumpy Avatars break presence

Physical lab
Time limit
Rotate _at_ lab top
Stop
top
Touch dragon
Finish rotate
Dragon at dest.
Time limit
(start) Follow straight path
start
Finish
Stop
Touch dragon
13
Virtual Reality Quest

• Dorian Miller
• Comp 239 Dec 16, 2002

14
Project development

• Spatial audio system for blind navigation
• UNC campus environment
• Navigation of campus environment
• RDW on campus
• RDW on campus with distractions
• RDW with avatars (in fairy tale world)

15
Guide

• Consistent interactive experience
• Same interaction when
• Moving along path
• Rotating

Virtual space
Lab space