A Network Design Architecture for Distribution of Generic Scene Graphs
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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Sharing a common view while collaborating in networked virtual environments is complex. The SOFT project examines a new approach using generic scene graphs as a bus, for graphics distribution. This thesis as part of the SOFT project examines network architecture for distribution of generic scene graphs. We design and implement the network architecture with a centralized Java server. This server provides scalability, persistence, reliability, and latecomer support. The server provides interoperability and can support any SSGs on any platform. The extraction of information from the network layer is implemented in two ways. In the first, we use Javas inherent serialization mechanisms in the second, we use the Dial a Behavior DaBP protocol. We empirically test the servers overhead with both network mechanisms. We have concluded that using DaBP significantly reduces the servers overhead by a factor of six but only for less than 50,000 packets. Moreover, the use of DaBP provides implementation flexibility because data format can change dynamically without requiring recompilation. Finally, DaBP, while promising, must mature and be shown to reduce overhead for large number of packets before it is ready to be incorporated into the final architecture solution for SOFT.
- Computer Systems