Accession Number : ADA274942


Title :   NPSNET-IV: A Real-Time, 3D Distributed Interactive Virtual World


Descriptive Note : Master's thesis Jul 91-Sep 93,


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA


Personal Author(s) : Young, Roy D


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a274942.pdf


Report Date : Sep 1993


Pagination or Media Count : 74


Abstract : The problems addressed by this research are to develop a new NPSNET simulator to allow simulations with any simulator that complies with the Distributed Interactive Simulation (DIS) protocol; to provide a more realistic simulation by maximizing the use of the Silicon Graphics Inc. (SGI) Reality Engine; and to provide for future extensions to the system. The approach taken for this research was to develop a DIS based simulator. To provide greater realism, Performer, a 3-D toolkit made by SGI was used to take advantage of its multiprocessing management capabilities, real-time scene management, and other rapid rending tools. To enhance the systems extensibility, C++ object classes were used to encapsulate entity behaviors and user inputs. The result of this work is the NPSNET-IV simulation system. This system uses the DIS protocol to interact with other heterogeneously developed simulators as was demonstrated in a week long simulation between NPSNET-IV and two different simulation systems written by the Air Force Institute of Technology. Performer's direct access to the Reality Engine hardware and real-time scene management allows integration of more realistic models and higher rates of movement in the virtual world. The extensibility of the system is enhanced through the use of C++ objects, which was proven by the addition of a submersible vehicle type to the simulation. NPSNET, DIS, Real-time, 3D, Visual simulation, Network, Distributed, Performer, Autonomous forces, Interactive, Virtual world, Stereo graphics.


Descriptors :   *REAL TIME , *INTERACTIVE GRAPHICS , COMPUTERIZED SIMULATION , SIMULATORS , INPUT , SIMULATION , TOOLS , RATES , TIME , INTEGRATION , APPROACH , SUBMERSIBLES , VEHICLES , WORK , MULTIPROCESSORS , ACCESS , GRAPHICS , ENGINES , SILICON , ADDITION , THREE DIMENSIONAL , THESES , AIR , AIR FORCE , MANAGEMENT , MODELS , NETWORKS


Subject Categories : Computer Programming and Software


Distribution Statement : APPROVED FOR PUBLIC RELEASE