基于BIM+GIS的航道三维漫游系统设计与实现

针对航道工程空间分布特性,将广域航道工程划分成若干区域,利用分区域的三维场景数据组织技术进行动态调度,通过插件工具对BIM模型进行轻量化减面处理,减少人工减面工作量,并提出Unity加载GIS多源数据技术方法,解决了航道工程大体量BIM+GIS三维数据在Unity引擎中无法加载、渲染卡顿、人工轻量化模型工作量大等项目实际应用过程中的难题。同时利用Unity引擎开发漫游系统,使得超长航道BIM+GIS三维数据加载与高质量的漫游可视化效果兼得成为可能,对BIM技术在航道工程中的推广应用具有重要价值。

Design and implementation of three-dimensional waterway roaming system based on BIM + GIS

According to the spatial distribution characteristics of waterway engineering,wide-area waterway engineering is divided into several regions,and the dynamic scheduling is carried out by the data organization technology of three-dimensional scenes in different regions.Plug-in tools are employed for the surface reduction of building information modeling(BIM),which ease the workload of manual surface reduction.In addition,the technology of loading geographical information system(GIS)multi-source data by Unity is proposed to solve the problems in practical project applications,such as loading failure of large-scale three-dimensional BIM+GIS data of waterway engineering in Unity,sluggish rendering,and huge workload of making model lightweight manually.In addition,a roaming system is developed utilizing the Unity engine,which enables the loading of three-dimensional BIM+GIS data of super-long waterway and high-quality roaming visualization.The system is of great value to the promotion and application of BIM technology in waterway engineering.