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A Software Architecture for Modeling and Distributing
Virtual Environments
(1996)
These pages hold the thesis abstract, introduction chapter and conclusion
chapter. You can download a 2 Mb ZIP file of the whole thesis in PDF, here.
Abstract
Introduction chapter
Conclusion chapter
Abstract
The simulation of a Virtual Environment (VE) is an intensive process which is
severely limited if restricted to one machine. Through distribution it is
possible to increase the size and accuracy of the simulation, thus permitting
multiple users to interact with each other and the VE.
Existing distributed VE systems have been designed to target a specific level
of distribution. This level is dictated by the geographical distance over which
the systems must operate and the communications medium connecting them. The
system requirements on a tightly-coupled multiprocessor system are not the same
as those of a system operating over a Wide Area Network (WAN). Consequently, the
solution for any given level does not scale well to larger or smaller system
configurations.
VE modeling has its heritage in Computer-Aided Design (CAD) and has evolved
unchecked into its present state. As the amount of information required in a VE
increases, so the current modeling techniques and tools are put under added
stress to cope with the extra load. Most modeling techniques are driven by the
structure of the system upon which the model must execute, rather than capturing
the structure of the information it should represent.
This thesis questions the motives behind VE modeling, examines the problems
of distributing a VE and details the various solutions that have been employed.
An analysis of the methods used leads to the selection of techniques which may
be combined to provide a solution unified over all levels of distribution. The
proposed solution is also integrated with and actively supports the modeling
process, thus providing a powerful environment for VE designers and participants
alike.
The architecture of this system is presented complete with a description of a
prototype implementation that demonstrates the key aspects. The thesis concludes
with an evaluation of the prototype.
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