虚拟现实技术下的城市景观仿真系统建构

Construction of urban landscape simulation system under virtual reality technology

为了解决传统系统平台应用中存在的开放性差、技术实现难度较大、成本投入较大等技术弊端,提出基于虚拟现实技术建构城市景观仿真系统的设计新思路。分析系统建设关键技术,包括三维城市景观可视化、虚拟现实技术,提出城市景观仿真系统建设总构思,并分析景观三维仿真及其规划。建立城市景观三维模型库,运用OSG渲染、实现漫游、场景优化等技术,成功构建并实现了基于虚拟现实技术的城市景观仿真系统。该系统能够实现摄影测量、GIS、可视化、海量数据处理、虚拟现实技术等多技术集成,从而让用户能够设计的系统,更真切地感受空间设计的合理性,以及规划方案可行性,真正为城市在下一阶段的规划及可持续发展,提供可靠的现代化技术保障。

A new design philosophy of constructing urban landscape simulation system based on virtual reality technology is proposed to solve the technological disadvantages of poor openness,difficulty in technology realization and high cost investment in the traditional system platform application.The key technologies of system construction,including 3D urban landscape visualization and virtual reality technology,are analyzed,the general conception of urban landscape simulation system construction is proposed,and the 3D landscape simulation and planning are analyzed.The 3D model library of urban landscape is established,and the urban landscape simulation system based on virtual reality technology is successfully constructed and implemented by means of the OSG rendering technology,roaming,scene optimization and other technologies.The system can realize multi⁃technology integration,such as photogrammetry,GIS,visualization,mass data processing and virtual reality technology,which allows user to use the designed system to more real feel the space design rationality and planning feasibility.It provides reliable modern technical support for the next stage of urban planning and sustainable development.