| The combination of the software and hardware technology development, and make computer to realize vivid visual image to operating data gradually become possible. This paper is to study the basis of virtual reality technology to explore how to build up and study the optimization of virtual environment technology. First introduced the concept of virtual reality technology and the basic technical features of virtual reality technology, analysis the research on virtual reality technology status and progress about home and abroad, with 3DS Max Modeling and the OGRE rendering technology, to discuss and study the construction of the virtual scene technology and features of the scene. On the basis of the scene Model, use a series of technology, such as fast anti-aliased texture mapping, mesh simplification. For more complex situations the scene, need to Resolve the contradictions between realistic rendering and real-time rendering. In order to achieve optimal real-time rendering, use the streaming mode to achieve the transmission of the three-dimensional model in the network. Based on the analysis and summary, study the following areas:First, the three-dimensional virtual model is a realistic basis for the entire virtual scene. In this paper, three-dimensional model built in the 3DS environment, and then imported into the OGRE rendering environment to complete the work scene. In order to achieve realism in the visual, use the algorithm of regional sum table to eliminate jagged edges. At the same time for the problems about this algorithm, the improved algorithm to reduction jagged edges in the visual, and increase a certain shows rate of the model.Second, to solve the contradictions between realistic rendering and real-time rendering, in order to simplify the model used triangular mesh simplification algorithm based on half edge collapse. At the same time this simplification algorithm also prepared for the streaming in the realization of the model compression.Third, Analysis the 3DS file format and data structure of Three-dimensional model stored in the scene, design storage and management about the database. the BSP tree algorithm used to achieve effective management of the scene. In streaming, the proposed action based on the progressive side of the grid collapse compression and decompression algorithms, the model is transformed into the representation which will help the network transmission effectively and reduce the model space.Fourth, by analyzing the OGRE rendering engine management characteristics of the tree under the scene and rendering realistic images of the method, in Visual Studio 2005 programming environment into OGRE for rendering complete secondary development, implementation of several models built and the grid demo Simplify the presentation. Based on the streaming three-dimensional geometric model of communication in the service-oriented architecture, that is three layer, client, middle tier and database systems to achieve network transport. |
