Lightweighting for Web3D visualization of large-scale BIM scenes in real-time

摘要: Semantics-guided lightweighting is proposed to reduce the amount of data processing in front end by removing redundant and creating an IFC Lightweight Scene Graph (IFC_LSG).Double-Layered Sparse Voxel (DLSV) for indexing improve access efficiency real-time Web3D building visualization.Incremental Frustum Interest (I-FOI) manage scene combining rendering pipeline current index. Display Omitted As a result informatization construction, Building Information Modeling (BIM) has now become core technology smart construction. We present Web3D-based solution visualization large-scale BIM scenes, considering redundancy, semantics, parameterization under limited resources network bandwidth web browsers. Taking Industry Foundation Classes (IFC) as input format, we firstly conduct semantics-guided operation on raw scenes repetitive objects parameterizing swept surfaces. Secondly, extract exterior products from buildings visibility culling construct Double-Layered index based sparse voxelization. Thirdly, integrate above two together into new structure named Incremental real-time. Our experiments demonstrate that: (1) with semantics information, our method able significantly redundancy scenes; (2) DLSV supports progressive loading facilitates indoor/outdoor efficiently; (3) I-FOI introduces frustum incremental-driven mechanism or unloading resource consumption.