Rearch On 3D Terrain Creation Based On Vision Sense Using Component

With the development of computer graphics technology, 3D figure of terrain has more advantageous than plane map. Visualization and building technology of 3D terrain is one of hot topics in computer graphics research.3D terrain creation method based on vision sense is one of the new ideas of terrain imitation field. It has the characteristics of visualization, non-program and graphics operation. It doesn't depend on real data measured but the vision conception of the user, who only need clicking the mouse to build the 3D scene interactively.This paper analyses in detail the building technology of 3D terrain nowadays, and implementation of interactive 3D terrain building technology based on visual sense. It implements the idea of 3D terrain building from part to whole, with the driving of user's visual sense. Because of the number of relative fields of terrain imitation is great, with the large number of using field, one program, edited as a whole, is incredible in the future of system maintenance and expand. Integrated with the latest development of 3D terrain, such as GIS based on real data and component technology, this paper implements the 3D terrain creation based on vision sense using component. With researching of COM program, how to combine the former program with COM technology is discussed. This paper presents the system frame and solution for each component structure. Descriptions of the solution progress of 3 key problems are listed.The following work has been done in this paper: First, this paper analyses in detail the technology idea of the interactive 3D terrain building technology based on visual sense. With the 3 characteristics of this new technology mentioned before, a visualization building system of 3D terrain is been constructed, using component. Different functions of operation modules are partitioned and encapsulated in ActiveX component form. The inner functions and communications have been designed and stored in Dlls. They represent their properties and methods using interfaces and make the program easy for development. In this system, different operation module functions are partitioned properly. Mouse clicking, retouching operations,object warehouse and mapping store have been defined again. All of those implementations have been proved to be useful to the coming development of the whole system.With the further research on 3D terrain visualization, expansibility and flexibility of 3D terrain creation have been expressed well. The 3D terrain that is built by this component system is applied widely to territory programming, military electronic sand table etc.