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In order to make users feel immersive in an interactive visual
simulation system, both of the visual render and user input
must be completed in real-time. As the complexity of the virtual
scene increase and the realism of the virtual environment is
requested by the user, the demand of high performance computing
for virtual environment is become very important. Such as
supercomputers or special purpose computers are often used. But
these computers are expensive. As the evolution of the computer,
both PC and workstation have gaining more power with less cost.
Hence, we can connect several PCs and workstations via LAN to
form a distributed high-speed computing environment to meet the
requirement of real-time visual simulation. Based upon this
concept, several distributed real-time computing environment
have proposed over this years. Such as division's dVS, MIT's
VETT and SICS's DIVE ..etc. All of them allow multi-user, but
confined in UNIX-based OS or special machines. In this paper, we
propose a distributed run-time environment which use PCs or
workstations that run WIN32-based OS and also, with the help of
DIS(distributed interactive simulation) a multi-user virtual
environment can be achieve. PNs theory allows a system to
be modeled by a mathematical representation. Timed Petri net(
TPN) is another kind of PNs. Recently, TPN is widely used to
analyze the performance of distributed computing systems and it
is very useful to model parallel and distributed systems. We use
the properties of TPNs to model the real-time visual simulation
to find the parallel , conflict tasks relation among these
tasks. These tasks are then partition into a set of logic
processes(LPs), which are distributed among networked
distributed machines. Also, Job Dispather and Communication
Interface are designed to communicate and synchronize these
distributed LPs.
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