公路实时三维可视化系统构架

Framework of Real-time 3-D Visualization System of Highway

基于公路CAD研究成果以及计算机图形学领域的最新发展,提出高性能、高扩展性的公路实时三维可视化系统构架,讨论了地形原始数据的预处理、地表三维建模、道路三维建模、道路模型与地形模型的实时整合、景观及附属设施三维建模、高效的场景管理、地形层次细节模型等功能设计与软件实现技术,并采用设计模式设计了类之间的组织模型,利用C++和DirectX 9.0c开发了公路实时三维可视化原型系统。最后依托实际工程项目对原型系统进行了测试和验证,实现了实时三维可视化手段对公路设计过程的支持以及对设计成果进行实时评价的目的。

Based on the newest techniques of fields of highway CAD and computer graphic and the ideas which they coupled together, framework of highway real time visualization system with high performance and high expansibility was presented. The function modules design and implement techniques were discussed in detail including pre-processing terrain raw data, modeling of the 3-D earth surface, modeling of 3-D road, modeling of real-time merging 3-D terrain and road, modeling of 3-D landscape elements and attachments, highway efficiency scene management and detail model of terrain hierarchy. The prototype system was developed using C＋＋ and DirectX 9.0c which structures of the classes were organized according to object-oriented principle and design pattern. The prototype system was also tested and verified based on a real project. The result shows that the real time 3-D visual system can support the process of highway design and estimate the production in an intuitionistic and real-time way.