Java 3d And Distributed Virtual Environments To Build

3D geographic information system has become a hot research content. Because the 3D-spatial data are more complex and there are more complex spatial relationships between 3D-spatia entities, so the research about 3D-gis is difficult. The improving of computer processing capacity and the computer network promote the integration of 3D-GIS and network, resulting in a three-dimensional network of GIS, and distributed virtual environment.This paper illustrates the concepts and theories related with virtual environment, including distributed virtual environment, virtual geographic environment, and the network distributed virtual environment framework, and distributed virtual environment and virtual geography. Then papers discussed Java3D basic theory, basic scenes structure, a virtual world, the geometric modeling and the movements modeling based on Java3D. This paper illustrates mainly how built a large-scale complex virtual environment with Java3D and DEM data, particularly discussed how to use Java3D achieve LOD(Level of Detail) model, how to construct a triangular network, how to control real-timely the virtual environment with mouse and Keyboard. This paper will demonstrate the virtual environment construction method based Java3D and DEM data through an application.The six chapters of this paper will design the distributed virtual environment's framework based on Java3D, client/server structure and TCP/IP agreement, introduced the construction pattern of complex 3D object and the flow of data in the distributed virtual environment, and tested it with real Dem data in the end.