Design And Implementation Based On OPENGL Of 3D Sand Table System

With the development of digital image technology, there has been a three-dimensional image display technologies, especially geographic information has grown from a simple two-dimensional expression extended to the image representation of the demand of the three-dimensional aspects of three-dimensional computer graphics, geographical virtualization technology, and topographic informationFrom that point, an OpenGL-based electronic sand table management system.Practical application for the development of background, the current system the development of mature mainstream technology, combined with the C and OpenGl technology, design and develop a system of electronic sand table based on the C / S mode. In accordance with the requirements of software engineering, in-depth study of the electronic sand table technology digital geographic models and geographic data collection model based on, first on the development of system requirements analysis, system functional requirements, the system is divided into five functional modules data input module, the 3D scene display module, spatial analysis module, roaming interactive control module and the data output module, and detailed design, respectively. In the outline design of system architecture design, analysis and design of the key technologies of design and three-dimensional topography of the terrain visualization, design, real-time display. In the system implementation, including the development environment of choice, the main function module, the module key code. Finally Visual C and OpenGL development tools package, detailed real-time roaming the Windows platform, the system is good to achieve the needs of users, its overall performance to achieve the design goals of the system.Electronic sand table system can be achieved can not be done in the past sandbox, you can use the three-dimensional geographical data, terrain visualization system, the display of three-dimensional scene, space analysis and real-time features such as roaming, good practical value..