VIRTUAL REALITY System that enables one or more users to move and react in a computer-simulated...
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Transcript of VIRTUAL REALITY System that enables one or more users to move and react in a computer-simulated...
VIRTUAL REALITY
System that enables one or more users to move and react in a computer-simulated
environment.
Various types of devices allow users to sense
and manipulate virtual objects much as they would
real objects. This natural style of interaction
gives participants the feeling of being immersed in the
simulated world. Virtual worlds are created by
mathematical models and computer programs.
Virtual reality systems use special interface devices to immerse users in a simulated world. This user is wearing a head-mounted display (HMD) and gloves. The image on the screen is the image the user sees
on the screens inside the HMD.
Interface Devices
Virtual reality simulations differ from other
computer simulations in that they require special
interface devices that transmit the sights, sounds, and sensations
of the simulated world to the user. These devices also
record and send the speech and movements of the participants to
the simulation program.
Interface Devices
The HMD or the Head-Mounted Display
Using this information, a computer recalculates images of the virtual world—a slightly different view for each eye—to match the direction in which the user is looking, and displays these images on the HMD.
Interface Devices
The haptic interfaceRelays the sense of touch and other physical sensations in
the virtual world, is the least developed and perhaps the most challenging to create. Currently, with the use of a glove and position tracker, the computer locates the user's hand and measures finger movements.
Development and Uses
In recent years, virtual-reality devices have improved
dramatically as the result of various technological advances.
Computers now are more powerful, have a higher memory
capacity, are smaller, and cost less than in the past.
These developments have made it possible for scientists
to develop virtual-reality simulations.
Development and Uses
Therapists use VR to treat sufferers of child abuse
and people who are afraid of heights.
Muscular dystrophy patients can learn to use a
wheelchair through virtual reality.
Surgeons may use VR to plan and practice an
operation on a virtual patient rather than a real person.
Development and Uses
Architects could take clients on a virtual tour of
a new house before it was built.
VR could be used to train the operators of aircraft
and other complicated machinery.
Development and Uses
• Network VR simulations could enable people in many
different locations to participate together in teleconferences,
virtual surgical operations, or simulated military training
exercises.