基于WebGL的BIM模型轻量化解决方案

BIM Model Lightweight Solution Based on WebGL

施工现场由于软硬件资源受限,BIM应用远落后于设计和运维等阶段。为解决BIM模型原始数据量大、数据交换难、渲染浏览慢等问题,在提取数据时进行拆分与压缩,在几何转换时采用降低几何数据大小的方式,进行渲染处理时,综合运用数据动态调用、多重层次细节、剔除算法及批量绘制等技术,降低资源消耗量、提升渲染效率,该BIM模型轻量化解决方案为施工阶段BIM应用提供图形引擎基础。

Due to the limited software and hardware resources,the level of BIM application in construction site is far behind that of building design and operation stage.Aiming at the problems of large amount of BIM original data,difficult data exchange and slow rendering browsing of BIM model,the data is split and compressed when extracting the data,the size of geometric data is reduced during geometric transformation,and technical means are comprehensively used,such as data dynamic call,multi⁃level detail,elimination algorithm,based on visibility and batch rendering to reduce resource consumption and improve rendering efficiency.This BIM lightweight scheme provides a practical graphic engine for BIM application.