Application Architecture
Apress eBooks · 2006
The application architecture consists of several components that are integrated in various ways depending on the specific deployment desired. Because the application is GIS based, any object in the world must be referenced to a geographic coordinate system. Figure 1 presents a high level view of the virtual world architecture that supports rapid deployment. Each component is discussed in more detail. Static Models The static models that are integrated into the world come from a variety of sources and requirements. Existing buildings and ground cover can be integrated as necessary to produce the desired detail. In some cases, custom construction of the models is necessary to meet the requirements for a particular case. In our work, several models may be reused with little or no modification in a broad class of applications. For example, the rules defining runway approach-departure surfaces are defined by standard parameters. Figure 2 shows a model used to visualize runway approach-departure and transitional surfaces. Models for buildings are frequently customized, although in many cases presentable models can be created with simple geometries painted with suitable images for the building sides. Terrain/Imagery