Virtual reality (VR) enables users to interact with complex data and environments, often used in entertainment, medicine, manufacturing, and education. Key developments in VR technology include head-mounted displays, input and output devices, and various immersive applications. While VR presents innovative opportunities for interaction, challenges such as usability issues and side effects remain prevalent.

2. WHAT IS VIRTUAL REALITY?
• “Virtual Reality is a way for humans to
visualize, manipulate and interact with
computers and extremely complex data.”
• Virtual reality is often sometimes called as
Synthetic Environment, Cyberspaces Artificial
Reality, Simulators Technology, etc.

3. VIRTUAL REALITY: STEPS OF
DEVELOPMENT
1. HMD—helmets
2. BOOM—BinocularOmni-Orientation Monitor
3. CAVE—CAVE Automatic Virtual Environment
4. 3D VIDEO Eyewear
5. Input devise, Output Devise
6. Hardware
7. Software

4.  Immersive
 Non - immersive
-> Augmented
-> Text-based
 Desktop (Window on a World)
 Video Mapping
Telepresence
Mixed Reality

5. Applications
 Entertainment
– More vivid
– Move exciting
– More attractive
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6. Applications (Cont’d)
 Medicine
Practice performing surgery.
Perform surgery on a remote patient.
Teach new skills in a safe, controlled environment.
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7. Applications (Cont’d)
 Manufacturing
– Easy to modify
– Low cost
– High efficient
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8. Applications (Cont’d)
 Education & Training
– Driving simulators.
– Flight simulators.
– Ship simulators.
– Tank simulators.
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9. Early Uses
Late 1960’s (the main players
in history)
• U.S. military radar system
& NASA
• Ivan Sutherland’s
“Sketchpad” for designers
• Flight simulators
• That cool headgear returns!

10. Current Uses
• Virtual reality war
zone stress reliever
• VR treatment with
kids
• Movie
entertainment
• Video game
entertainment

11. • Training
– Military
• Microsoft flight sim?
– Scholarly
– Medical
– Construction
– Law Enforcement
– Lots more….

12.  Interaction with the environment.
 User interface.
 user can see and even feel the shaped surface under
his/her fingertips.
 Flight simulators and games.
 CAD/CAE
 Biomedical Engineering the projects mentioned are
use of virtual reality for viewing of X-RAY's and MRI‘s.
 Rendering and 3-D lighting, modeling for resource
management.

13. New technologies have also revealed new problems.
VR in medical treatment is going through some growing
pains.
There are limitations with VR devices as well in regards
to usability.
lack of standardization of hardware and protocols
Most troublesome are the side effects it can induce, like
disorientation, dizziness and nausea.
People often find navigating in 3-D spaces and
performing actions in free space extremely difficult.
practical problems in spatial cognition research

14. Future of VR?
• Future only bound by technological advance
– Nanotechnology?
– Implants?
• U. Washington already researching:
– Retina image screening
– Nervous system implanting (EEG and EMG)
• Unmanned Flight
– Gulf War…

15. Summary
 Visualization of complicated, large data is helpful
for understanding and analysis.
 VR offers us a new way to interact with
computer.
 VR enables us to experience the virtual world
that is impossible in real world.
 VR is changing our life, eventually VR will
increasingly become a part of our life.
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18. Virtual reality Modeling Language (VRML)
Most exciting is the ongoing development
of VRML on the World Wide Web. In
addition to HTML (Hypertext Markup
Language), that has become a standard
authoring tool for the creation of home
pages, VRML provides three-dimensional
worlds with integrated hyperlinks on the
Web. Home pages become home spaces.

19. Characteristics Of VRML
• Not a programming language like c++ or java
• Descriptive (rather than procedural) like HTML
• File formats contains human readable and editable ASCII
text