基于WebGL的静态切割单体化方法OA

Aiming at the common problem of insufficient interaction ability in large-scale real-scene 3D models generated by oblique photogrammetry technology,we systematically study the key technologies of individualization of real-scene 3D models and their imple-mentation paths on the Web side.By comparing and analyzing the technical characteristics of three types of mainstream individualization methods,it is found that the existing methods face common problems such as poor data compatibility,low computing efficiency,and weak interaction functions in the Web environment.Based on this,we propose a static individualization method of surface cutting based on WebGL,and construct a technical framework including four modules:model preprocessing,spatial index simplification,cutting parameter calculation,and interaction function integration.The Babylon.js 3D graphics engine is used to optimize model loading and rendering,and the model cutting operation is executed through the Web Workers multithreading technology.The geometric calculation efficiency is improved by combining with the spatial bounding box algorithm.Experiments show that on the premise of maintaining the UV coordinates and texture accuracy of the original model,the proposed method can support sub-second individualization processing in web environments,and reduce the memory occupation by 20%.By establishing the associated mapping between the attribute database of building components and the 3D model,interactive functions such as component-level attribute query,spatial measurement,and visual an-notation have been successfully achieved,and the cross-platform integration application of real-scene models and BIM data has been realized in the WebGIS platform,providing an extensible technical solution for the construction of the 3D digital foundation in the construction of new smart cities.