Webvis_bim: Real Time Web3d Visualization Of Big Bim Data

With the rapid development of Building Information Modeling (BIM) and web3D technology, interactive visualization of big BIM data is very essential in industry. In this paper, Industry Foundation Classes (IFC) format is specially analyzed and we have found that it is usually big volume, complicated compositions and loose organizations, it is almost impossible to visualize big BIM data in real-time on Web browsers. To realize this challenging task, (1) big IFC data is lightweighted effectively via semantic cues and voxelization shape descriptor by removing unnecessary data redundancies; (2) each big building product is divided into exterior product and interior product; (3) incremental Frustum of Interest (FOI) based scene management is proposed for progressive loading big BIM scenes through Internet to realize real time rendering large scale BIM scene on Web browsers. The experimental results show our proposed method cannot only reduce the redundancies of big BIM data greatly, but also do visibility culling of complex BIM scenes exactly and efficiently. We successfully realize real-time visualization of complex BIM scenes on Web browsers.