Fine-grained Web3D online visualization method for large-scale building scene

Abstract

The invention discloses a fine-grained Web3D online visualization method for a large-scale building scene, and the method comprises the steps: firstly, carrying out lightweight preprocessing in a model-level fine-grained mode and a file-level fine-grained mode in a BIM model lightweight preprocessing stage; secondly, in the network end pre-rendering and transmission scheduling processing flow, loading preprocessing, optimal initial viewpoint selection, visual increment list calculation, interestingness calculation, file packaging and the like are included; and finally, in a Web end multi-thread asynchronous loading and rendering process, firstly performing incremental downloading on visual component data in a scene through multiple threads, making online efficient analysis on a file package by a WebAssembly technology, then carrying out instantiation rendering by using reuse information of the component, and carrying out component loading and removal management by a cache scheduling mechanism based on interestingness. Through the process processing, a set of progressive lightweight online visualization solution for a large-scale BIM scene is completely realized.

Description

technical field [0001] The invention relates to the technical field of three-dimensional modeling and rendering, in particular to a fine-grained Web3D online visualization method for large-scale architectural scenes. Background technique [0002] Today, the "Internet +" technology is becoming more and more mature, and the "VR+" technology is beginning to rise. The demand for online display of 3D virtual scenes on mobile web browsers has emerged, and the online visualization of large-scale Web3D scenes has become more and more popular. For the field of construction, with the building informatization, Building Information Model (BIM) has become the mainstream technology in the development of construction and civil engineering informatization. The integration of BIM and Web3D visualization for mobile Internet has become an important research and application direction. [0003] However, the architectural model data is often very large, showing an explosive growth trend in recen...

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