Bowman’s
Design Guidelines
·
After numerous
experiments using different combinations from his proposed taxonomy Bowman
derives the following guidelines for
developing user interaction in a VE:
·
General
o
Natural metaphors
may not be the most effective
o
Provide redundant
interaction techniques
·
Travel Techniques
o
For simple
movement, target based locomotion is simplest
o
Avoid the use of
teleportation; use smooth movement
o
Steering
techniques can lead to disorientation; context information should be provided
o
Limit the degrees
of freedom where possible to reduce cognitive overload
·
Selection
Techniques
o
Use ray-casting
for speedy selection of remote objects
o
Make sure object
selection allows appropriate object manipulation
o
Maximise
perceived size of objects
·
Manipulation
Techniques
o
Limit the degrees
of freedom if possible
o
Allow direct
manipulation with a Virtual Hand
o
Avoid frequent
scaling of the environment
o
Use aides for
depth manipulation