基于云渲染的三维BIM模型可视化技术研究
Research on cloud rendering based 3D BIM model visualization techniques

摘要 利用BIM（Building Information Modeling）技术进行工程建设的精细化管理需要实现三维BIM模型的在线展示及交互操作.传统的三维图形可视化技术虽然能够实现模型展示，但存在模型文件格式兼容性差，对终端设备硬件要求高，缺少必要的交互功能等问题.针对这些问题进行系统分析，提出了一套基于云渲染技术的三维BIM模型可视化解决方案.其中包括源模型文件轻量化转换技术，基于HOOPS的图形引擎开发技术，以及基于云渲染的大体量模型浏览器展示和交互技术.通过系统研发实现了主流建模软件Revit、Catia、Microstation、Tekla模型源文件的轻量化转换，以及基于云渲染的图形引擎系统，并在北京至张家口铁路工程建设项目中进行了验证.
Abstract：The use of BIM for fine engineering project management requires online display and interaction of 3D BIM models. Although traditional 3D graphics visualization technology can display models, there are still some problems such as poor compatibility of the model file format, high hardware requirements of devices and lack of necessary interactive functions. In order to solve these problems a cloud rendering based 3D BIM model visualization solution is proposed. The solution includes BIM model lightweight conversion technology, HOOPS based graphics engine development technology, cloud rendering based large model display and interactive technology. Through the research and development of the system, BIM models designed using Revit, Catia, Microstation, Tekla etc. are converted into lightweighted formats, and a cloud rendering based graphics engine system is developed and verified in Beijing to Zhangjiakou railway project.