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.
Approved for public release; distribution is unlimited.
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 ...
Observationally constrained modeling of sound in curved ocean internal waves: Examination of deep ducting and surface ducting at short range Duda, Timothy F.; Lin, Ying-Tsong; Reeder, D. Benjamin (Acoustical Society of America, 2011-09);A study of 400 Hz sound focusing and ducting effects in a packet of curved nonlinear internal waves in shallow water is presented. Sound propagation roughly along the crests of the waves is simulated with a three-dimensional ...
Gille, Sarah T.; Stevens, David P.; Tokmakian, Robin T.; Heywood, Karen J. (2001-02);Coherence analysis techniques are used to compare Southern Ocean wind forcing with Antarctic Circumpolar Current transport. Winds are derived from five different products: ERS winds that have been bin-averaged, weekly ...