Virtual Reality on a WIM

1
Virtual Reality on a WIM

• Interactive Worlds in Miniature

2
WIM (Interactive Worlds in Miniature)
3
Problems

• Things cant be reached.
• Things hidden from view.
• Things beyond our sight and behind us.
• Things appear close to each other because they
  line up along our current line of sight.
• Single viewport
• Single scale (usually 11)

4
Previous Works

• Object Selection
• Object Manipulation
• Navigation

5
Object Selection

• Raycasting
• Selection cones

6
Object Manipulation

• Wares Bat
• Sachss 3-Draw
• Hinckleys work

7
Object Manipulation (cont)

• 3DM
• An immersive 3D drawing package
• Biers Toolglass and Magic Lenses

8
Navigation

• Darken
• Many important techniques but primarily 2D in
  nature. The WIM has extended some of these
  techniques into the third dimension.
• Fishers map cube
• http//www.artmuseum.net/w2vr/archives/Fisher/04a
  _VIEW.html

9
WIM System description

• Headmounted display (HMD)
• Clipboard
• Buttonball

10
WIM Interaction techniques
11
WIM Changing POV

• Seeing objects from different angles
• Pro
• remove or reduce occlusion
• improve the sense of immersion
• save the point of view in larger environment
• Con
• increase complexity
• requirement on framerate

12
WIM Object Selection

• To select objects out of physical arms reach
• Before
• Flying moving the camera
• WIM
• Select the object itself
• Select its proxy on the WIM

13
WIM Object Manipulation

• Direct manipulation
• WIM
• Scalelt1 far-reaching coarse-grained control
• Scalegt1 a three dimensional magnifying glass

14
WIM Navigation

• Before FLying
• WIM Reach into the WIM and pick himself up

15
WIM Update the immersive world

• Immediate update
• Either not desirable or impossible
• Post-facto
• Slow in/slow out animation (view point)
• Batch
• An explicit command of several changes

16
WIM Visualization

• Spatially locating and orienting the user
• Path planning
• History
• Measuring distance
• Viewing alternate representations
• Three-dimensional design

17
WIM Multiple WIMs

• Widely separated regions of the same environment
• Several completely different environments
• Worlds at different scales
• The same world with different applied to the
  representation
• The same world displayed at different points in
  time

18
WIM Multiple WIMs (cont)
19
WIM Interface

• Importance of Props
• Grasping gesture Physical Props
• Props
• The Clipboard Rotate, Pass between two hands
• The Button Ball
• Pen (2D) Button ball (3D)
• Two hand interaction
• Shape of Props

20
WIM Problems with props

• Fatigue
• Holding a physical clipboard
• Solution clutching mechanism
• Limitation of Solid Objects
• Physical pro gets in the way
• Solution ability to disengage the WIM

21
WIM Observation

• Design an office space
• User Reaction
• Arm fatigue is not a major problem.
• The weight of HMD was the only fatigue.
• Participants understood and like the clutching
  mechanism.
• Rotating the camera
• Intentional misregistration
• Selection by trolling

22
WIM Observation (cont)
23
CHIMP Chapel Hill Immersive Modeling Program

24
CHIMP
25
Questions?