1. VIRTUAL REALITY Sagar.Khadabadi

2. 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”.

3. There are two important terms that must be mentioned when talking about VR: Telepresence Cyberspace.

4. VR TECHNOLOGY: Levels of immersion in VR systems Desktop VR Fish Tank VR Immersive systems

5. VR INPUT DEVICES Position and orientation tracking devices

6. 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

7. 3D Input Devices 3D Mice and Bats Gloves SpaceBall

8. Modeling, Interaction and Rendering CONSTRUCTION OF VIRTUAL WORLDS Data structures and modeling  Hierarchical scene database  Visibility pre computation (analysis)  Memory management

9. 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

10. RENDERING THE VIRTUAL WORLDS Eye-In-Sensor Sensor-In-Emitter Emitter-In-Room Room-In-World

11. VR OUTPUT DEVICES Visual displays Technology  CRT  LCD

12. VR visual output devices  3D glasses  Head Mounted Displays (HMD)

13. Surround Displays

14. Haptic displays Kinesthetic (force) feedback Tactile feedback

15. HUMAN FACTORS Visual perception characterization Field of view: Figure: Human field of view: (a) vertical, (b) horizontal

16. HUMAN FACTORS Visual Acuity Temporal Resolution Simulator Sickness  Latency and synchronization  Frame rate variations

17. FUTURE RESEARCH DIRECTIONS IN VR Ergonomics of visual displays Tracking technologies Computing power and rendering architectures User interfaces “Seamless” virtual environments

18. 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

19. QUESTIONS???

20. tHaNk yOu!!