- Adventure games, MUD/MOO
Textually
described virtual worlds where the user perceives the virtual environment
through mental images based on the words read (like reading a novel).
- Desktop
3D virtual
environment graphically displayed on a desktop computer monitor.
- Projected
3D environment
projected onto a screen. Enables a single user to demonstrate concepts to a
group of people. A CAVE(tm), where several sreens are used to surround the user
with images, is the most advanced form of projected VR in use today.
- Semi-immersive
Most advanced
flight, ship and vehicle simulators are semi-immersive. The cockpit, bridge, or
driving seat is a physical model, whereas the view of the world outside is
computer-generated (typically projected).
- Immersive
3D environment
seen through a head-mounted display (HMD). In a completely immersive system the
user feels part of the environment (experiences a feeling of 'presence'). The
user has no visual contact with the physical world.
- Distributed Virtual Environments
Any of the
above, where there are multiple users present in the world. Sometimes called
'shared worlds'.
- Telepresence
Control remote
devices by mimicking actual events in the physical world as they happen. Useful
for performing operations in hazardous environments or where it is otherwise
inconvenient to be present in person.
- Augmented reality
Combining the
physical and virtual worlds, typically to annotate the physical world or to
provide missing information. For example, to recreate the view that an operator
of an aircraft would have seen if it had not been foggy.
(Credits to Micheal Louka:
http://www.ia.hiof.no/~michaell/home/vr/vrhiof98/whatisvr/What8.html)
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