【作者】 关克平； 施朝健； 肖英杰； 杨神化；

【Author】 GUAN Ke-ping, SHI Chao-jian, XIAO Ying-jie, YANG Shen-hua (Merchant Marine College, Shanghai Maritime University, Shanghai 200135, China)

【机构】 上海海事大学商船学院；

【摘要】 船舶操纵模拟器已经广泛应用于港航设计论证中,针对通航评估模拟对三维视景系统的要求,提出了一套有效的三维视景建模流程,特别是研究了自然景物、岸上建筑、助航标志和水上船舶的数据库建模技术,对电子海图数据、数字高程模型(DEM)数据和工程设计数据进行有效处理以确保三维视景模型的精确度。介绍了整个数据库的融合技术,从而构建高逼真度的虚拟航海环境。采用面向对象与层次型相结合的三维数据结构建立视景数据库模型,利用层次细节(LOD)和动态物标数据管理技术提高视景显示的速度和灵活性。这套技术已经成功应用于10多项港航设计论证项目的实际研究中,取得了较好的效果。更多还原

【Abstract】 Shiphandling simulators are widely used in assessment of navigational safety of waterways and channels. According to the needs of three-dimensional vision in the simulation assessment, an effective procedure of 3D vision modeling was developed. Special techniques were investigated for constructing databases of natural scenes, buildings on land, navigational aids, and water surface vehicles. To ensure accuracy of the 3D data, attention was paid to proper processing of digital hydrographic data and digital elevation model data, as well as data of engineering designs. Methods of integrating these databases were introduced to construct complex navigational scenario with high fidelity, and an object oriented database model with hierarchical structure was built to allow level-of-detail rendering and flexible display of dynamic or moving objects. The technologies developed have been applied to more than ten practical projects and the successful results have been obtained.更多还原