Virtual reality: A virtual environment (VE) is a digital space in which a user’s movements are tracked and his or her surroundings rendered, or digitally composed and displayed to the senses, in accordance with those movements.

2.  A virtual environment
(VE) is a digital space in
which a user’s
movements are tracked
and his or her
surroundings rendered,
or digitally composed
and displayed to the
senses, in accordance
with those movements.

3.  VR is able to immerse you in a computer-generated
world of your own making: a room, a city, the interior
of human body With VR, you can explore any
uncharted territory of the human imagination.
 Immersive VR.
 Augmented Reality.
 Through The Window.
 Mirror World or 2nd
Person VR.

4.  Immersive virtual reality provides an immediate,
first-person experience. In immersive VR, the user is
placed inside the image; the generated image is
assigned properties which make it look and act real
in terms of visual perception.

5.  A variation of immersive virtual reality is
Augmented Reality where a see-through layer of
computer graphics is superimposed over the real
world to highlight certain features and enhance
understanding.

6.  With this kind of system, the user sees the 3-D world
through the 'window' of the computer screen and
navigates through the space with a control device
such as a mouse.

7.  It is also known as 2nd Person VR. Mirror Worlds
(Projected Realities) provide a second-person experience
in which the viewer stands outside the imaginary world,
but communicates with characters or objects inside it.

8.  There are 3 types of VR Applications.
 Perambulation
 Synthetic Experience
 Realization

9.  This involves walking or flying sort of thing in the
Virtual world. For example, a person is walking
through a building. Here, the users are mostly
interested in observing aspects not in interactions.
Users may focus on moving objects in the Virtual
Environment.

10.  These allow participants to safely and cheaply practice
skills which are dangerous as well as expensive in the
real world to develop like perform surgery, learn flying
aircrafts, operate a plant control room etc. A participant
learns how to perform actions by participating them with
the hands.

11.  These allow us to see and graphically manipulate
context dependent data in a 3-D world. VR allows the
participant to reach out in the virtual world and
manipulate data representations e.g. foreign currency,
inventory of items etc, as they are the real objects.

12.  Head-Mounted Display (HMD)
 A Helmet or a face mask providing the visual
and auditory displays.
 Use LCD or CRT to display stereo images.
 May include built-in head-tracker and stereo
headphones

13.  Binocular Omni-Orientation Monitor (BOOM)
 Head-coupled stereoscopic display device.
 Uses CRT to provide high-resolution display.
 Convenient to use.
 Fast and accurate built-in tracking.

14.  Cave Automatic Virtual Environment (CAVE)
 Provides the illusion of immersion by projecting
stereo images on the walls and floor of a room-
sized cube.
 A head tracking system continuously adjust the
stereo projection to the current position of the
leading viewer.

15.  Data Glove
• Outfitted with sensors on the fingers as well as an
overall position/orientation tracking equipment.
• Enables natural interaction with virtual objects by
hand gesture recognition.

16.  Control Devices
• Control virtual objects in 3 dimensions.

17.  Virtual Reality is also
used in Medicine,
Manufacturing,
Education Training etc.
 Medicine
 Practice performing
surgery.
 Perform surgery on a
remote patient.
 Teach new skills in a
safe, controlled
environment.

18.  Manufacturing
• Easy to modify
• Low cost
• High efficient

19.  Education & Training
• Driving simulators.
• Flight simulators.
• Ship simulators.
• Tank simulators.

20.  Desktop Computers equipped with visualization
packages and simple interface devices are far from
being an optimal solution for data presentation and
manipulation. VR promises more intuitive way of
interaction. The first attempts to apply VR as a
visualization tool were architectural walkthrough
systems.

21.  VRML (Virtual Reality Modeling Language)
• Standard language for interactive simulation
within the World Wide Web.
• Allows to create "virtual worlds" networked via
the Internet and hyperlinked with the World
Wide Web.
• Aspects of virtual world display, interaction and
internetworking can be specified using VRML
without being dependent on special gear like
HMD.
• VR models can be viewed by Netscape or
Google chrome with a browser plug-in.

22.  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.