NPSNET: environmental effects for a real-time virtual world battlefield simulator
Corbin, Daniel P.
Zyda, Michael J.
Pratt, David R.
MetadataShow full item record
The Computer Science Department at the Naval Postgraduate School in Monterey, California has developed a low-cost real-time interactive simulation system using the Distributed Interactive Simulation (DIS) Protocol, known as NPSNET, that works on commercially available Silicon Graphics IRIS workstations. The DIS protocol has provisions for an environmental effects Protocol Data Unit (PDU), but effects of a changing environment have not been implemented to use it. Furthermore, this lack of environmental effects reduces the realism of the simulations, such as NPSNET, that use the DIS protocol. The challenge in implementing environmental effects such as smoke, dust and the passage of time is to develop a model that users perceive as realistic, but is computationally cheap enough to be used in real-time applications. It is the lack of environmental effects, usable in interactive simulations, that we attempt to solve. This thesis focuses on creating a library of visually realistic environmental effects for NPSNET that includes smoke, flames, clouds, lightning, the passage of time and night observation devices. The algorithms were initially derived from physical models, but were found to be too computationally intensive to be used in a real-time application. Thus, it was necessary to simplify the model by depending mainly on visual realism over physical models in creating the effects presented here. The result is a library of environment effects that are both 'visually accurate' and usable in real-time applications.
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Showing items related by title, author, creator and subject.
Bradley, Douglas A. (Naval Postgraduate School (U.S.)Program for Culture and Conflict Studies, 2011-04-22);"In 1867, Secretary of State William Seward purchased Alaska securing America's place with Russia, Norway, Denmark, and neighboring Canada as an Arctic nation. Though criticized as 'Seward's Ice Box,' in short time, Alaska ...
Chu, P.C.; Fan, C.W. (Preprints.org, 2020);Underwater wireless optical communications (UWOC) have attracted considerable attention in recent years as an alternative means for acoustic communication. However, optical path loss of light propagation from attenuation ...
Chu, P.C.; Fan, C.W. (SPIE, 2019);Optical detection systems have the potential to get around some limitations of acous- tic detection systems, especially with increased fleet and port security in noisy littoral waters. Identification of environmental effects ...