VIRTUAL REALITY

Sagar.Khadabadi

Introduction

• The very first idea of it was presented by Ivan Sutherland in 1965: “make that (virtual) world in the window look real, sound real, feel real, and respond realistically to the viewer’s actions”.

There are two important terms that must be mentioned when talking about VR:

• Telepresence

• Cyberspace.

VR TECHNOLOGY: Levels of immersion in VR systems

• Desktop VR

• Fish Tank VR

• Immersive systems

VR INPUT DEVICES

• Position and orientation tracking devices

The most important properties of 6DOF trackers,to be considered for choosing the right device for the given application are:

• Update Rate • Latency • Accuracy • Resolution • Range

3D Input Devices

• 3D Mice and Bats• Gloves

• SpaceBall

Modeling, Interaction and Rendering

CONSTRUCTION OF VIRTUAL WORLDS

• Data structures and modeling

Hierarchical scene database Visibility pre computation (analysis) Memory management

INTERACTING WITH VIRTUAL WORLDS

• Interaction paradigms in 3D

• Camera control Eyeball in hand Scene in hand

• Navigation Hand directed Gaze directed Physical controls Virtual controls

VR OUTPUT DEVICES

Visual displays• Technology

CRT LCD

VR visual output devices

3D glasses

Head Mounted Displays (HMD)

Surround Displays

Haptic displays

• Kinesthetic (force) feedback

• Tactile feedback

HUMAN FACTORS

Visual perception characterization

• Field of view:

Figure: Human field of view: (a) vertical, (b) horizontal

HUMAN FACTORS

• Visual Acuity

• Temporal Resolution

Simulator Sickness Latency and synchronization Frame rate variations

FUTURE RESEARCH DIRECTIONS IN VR

• Ergonomics of visual displays

• Tracking technologies

• Computing power and rendering architectures

• User interfaces

• “Seamless” virtual environments

References• Atlantis: Atlantis VR Systems.

http://vr-atlantis.com/vr_systems_guide/vr_systems_list2.html

• F. Brooks Jr., P. Hubbard, R. Pausch, A. van Dam: Research Frontiers in Virtual Reality.

• M. Gigante: Virtual Reality: Definitions, History and Applications. “Virtual Reality Systems”, Academic-Press, ISBN 0-12-22-77-48-1

• J. Isdale: What is Virtual Reality?ftp://ftp.u.washington.edu/public/virtualworlds/papers/whatisvr.txt

• http://www.nta.no/telektronikk/4.93.dir/Loeffler_C_E.html

QUESTIONS???

tHaNk yOu!!