基于WebGL的开放BIM跨平台可视化方案研究

RESEARCH ON OPEN BIM CROSS-PLATFORM VISUALIZATION BASED ON WEBGL

当前工程中应用的基于C/S(Client/Server)架构的本地BIM可视化系统依赖于软件平台且网络负载大,无法通过浏览器实现资源共享。本文通过模型转化、数据轻量化、数据渲染、模型交互,设计了一种基于B/S(Browser/Server)架构的在线BIM可视化方案。针对基于IFC的BIM设计模型,将Revit几何体转化为参数化几何体,对参数化几何体进行三角化、轻量化处理,并对转换后以JSON格式存储的数据进行WebGL数据渲染,开发了一种基于WebGL的在线BIM可视化系统。该系统解决了BIM数据的轻量化和跨平台问题,实现了模型和建筑图的在线浏览和信息交互。最后通过实例验证了该系统的可行性和有效性。

The local BIM visualization system based on the C/S(Client/Server)architecture applied in the current project relies on the software platform and the network load is large,and resource sharing cannot be achieved through a browser.An online BIM visualization scheme based on the B/S(Browser/Server)architecture through the model transformation,data lightweight,data rendering,and model interaction was designed in this paper.Aiming at the IFC-based BIM design model,the Revit geometry was transformed into the parameterized geometry,the triangulated and lightweight processes were performed on the parametric geometry,and the WebGL data rendering was performed on the data stored in the JSON format after the conversion,enabling an online WebGL-based Development of BIM visualization system.This system solved the problem of light weight and cross-platform of the BIM data,and realized online browsing and information interaction of models and architectural drawings.Finally,an example was used to verify the feasibility and effectiveness of the system.