Research on Lightweight Method of Ancient Building Information Model Based on WebGL

Ru Wang,Jia He,W Qin,V Yepes,L Wang

doi:10.1051/e3sconf/202016504008

Ru Wang, Jia He + Show 3 more

Open Access

https://doi.org/10.1051/e3sconf/202016504008

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Abstract

Aiming at the large amount of component data in the 3D dynamic display of the ancient building BIM model, which caused difficulties in information exchange during the protection of the ancient building, a lightweight method of the ancient building BIM model combining with WebGL and IFC standards was proposed. Using WebGL technology to extend the 3D visualization method of BIM models of ancient buildings, providing new technical support for the protection and research of ancient buildings. First define the JSON intermediate file, design the Revit-JSON data interface, make the model support .html and .js format, and improve the visual display method of the web side; use JavaScript to directly call the JSON interactive program of the underlying GPU to improve the web-side rendering effect of the model; Three.js framework realizes the display and interaction of 3D models of ancient buildings on the Web. Taking a typical ancient building as an example to carry out experiments, the method in this paper can reduce the storage volume by more than 70% on the basis of ensuring that the model information is complete, and has a good rendering effect in the browser. The experimental results verify the effectiveness and feasibility of the method.

Highlights

Ancient architecture is an important part of traditional historical culture, a witness to history, and a carrier of culture
Wang Ru et al used graphic database to store data and related information of ancient buildings, and built an information model of ancient buildings in Ming and Qing Dynasties based on BIM Technology[2].Xu Zhao et al Proposed a research analysis method of building information model visualization based on WebGL and IFC[3]
The IFC standard is widely used in the data exchange format research of building information models[6-7]

Summary

Introduction

Ancient architecture is an important part of traditional historical culture, a witness to history, and a carrier of culture. Wang Ru et al used graphic database to store data and related information of ancient buildings, and built an information model of ancient buildings in Ming and Qing Dynasties based on BIM Technology[2].Xu Zhao et al Proposed a research analysis method of building information model visualization based on WebGL and IFC[3]. The existing research focuses only on the application of WebG L technology itself [4-5], ignoring the interactive function of BIM model. This paper is mainly to realize the visualization of BIM models of ancient buildings on the Web and to provide new technical means for the protection of ancient buildings. The visualization of BIM model of ancient buildings mainly includes two aspects: model file conversion and model re-interaction on the web side

Model file format conversion

Findings

Conclusion