地铁BIM模型Web端轻量化策略及加载优化方法研究

基金项目: 国家重点研发计划项目（2022YFC3005203）

Web lightweight strategy and loading optimization method for subway BIM model

1.
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu　611756, China
2.
School of Information Science and Technology, Southwest Jiaotong University, Chengdu　611756, China
3.
Guangzhou Metro Design & Research Institute Co. Ltd., Guangzhou　510010, China

摘要: 地铁BIM（Building Information Modeling）模型具有体量大、构件重复率高、外形规整等特点，针对其Web端模型加载、渲染效率低下，易导致浏览器卡顿、页面崩溃等问题，提出地铁BIM模型Web端轻量化策略及加载优化方法。验证表明，采用恰当的模型轻量化手段可显著减少复杂建筑模型的面片数量，降低模型存储消耗，结合视锥体剔除算法，能够有效提高渲染帧率与用户交互流畅度。
- BIM /
- 模型轻量化 /
- 视锥体剔除 /
- Web3D渲染 /
- 地铁设计
Abstract: The Building Information Modeling (BIM) model for subway buildings has the characteristics of large volume, high component repetition rate, and regular appearance. Aiming at the low efficiency of its Web side model loading and rendering, which could easily lead to browser jams, page crashes, and other issues, this paper proposed a subway BIM model Web side lightweight strategy and load optimization method. Experiments show that using appropriate model lightweight methods can greatly reduce the number of patches in complex architectural models, reduce model storage consumption, and combine visual cone culling algorithms to effectively improve rendering frame rate and user interaction fluency.
- Building Information Modeling (BIM) /
- lightweight of model /
- frustum culling /
- Web3D rendering /
- subway design

图 1 广州地铁某车站5个典型专业的BIM模型

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图 2 地铁BIM模型缓存IndexDB的数据组织

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图 3 模型本地加载缓存流程

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图 4 视锥体包围球俯视图

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图 5 基于包围球的构件剔除流程

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图 6 数据加载优化对比

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图 7 视锥体剔除渲染方法对比

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表 1 地铁线路不同专业BIM模型体量对比

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表 2 客户机与服务器平台配置

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