Digital twin BIM model conversion and lightweight method and device

Abstract

The invention provides a digital twin BIM model conversion and lightweight method and device, and relates to the field of BIM. The method comprises the following steps: converting files exported by different model design software into a unified custom format file; converting a coordinate system of the three-dimensional model in the unified self-defined format into a three-dimensional coordinate system supported by a web engine; and splitting the three-dimensional model into key data, performing reduction optimization on the three-dimensional model according to the key data and the curvature value of the three-dimensional model, and writing geometric features, spatial topology and texture data of the optimized three-dimensional model into a tile format file. According to the method, the original huge model is reduced to about one fifteenth of the original model, the method is applied to the BIM field, the lightweight model can be widely applied to a web side and a mobile phone client side, and the production efficiency is improved; meanwhile, the LOD technology is added in the three-dimensional model reconstruction method, the pressure of system rendering is relieved, and system operation is smoother.

Description

technical field [0001] The invention relates to the field of BIM, in particular to a digital twin BIM model conversion and lightweight method and device. Background technique [0002] BIM technology has gradually become a new way and method of engineering design, construction, management and maintenance, and it has taken the lead in comprehensive application in the field of architectural engineering design. In addition to the design department, the follow-up related construction and operation and maintenance management around the design results have also begun to vigorously promote the related applications of BIM technology. However, through the BIM application in the design field, it can be found that the BIM model project is huge and the volume is huge, which poses a severe challenge to the computer performance of the subsequent application system. If you want to carry out BIM design and management applications smoothly, you need to purchase a high-end graphics workstatio...

AI Technical Summary

Problems solved by technology

However, through the BIM application in the design field, it can be found that the BIM model has a huge project and a huge volume, which poses a serious challenge to the computer performance of the subsequent application system

If you want to carry out BIM design and management applications smoothly, you need to purchase a high-end graphics workstation, which is costly, especially for applications on the network side. The real-time rendering of the network 3D scene model will appear stuck, the transmission speed is slow, and the experience interaction is poor. , there is an urgent need for new solutions, while ensuring the application advantages of BIM technology in design, construction, operation and maintenance, etc., by reducing the volume of the model (including reducing the number of points, surfaces, etc.), lightweight processing of the BIM model , to ensure the lightweight of the model

[0003] At present, there are many ways to reduce the weight of BIM models, such as deleting relevant vertices, folding patches, LOD, etc. If the simplification ratio is higher, the inner model is deleted and only the outer model is displayed. This simplification method The biggest problem is that the internal component information cannot be queried

On the basis of this simplification, some methods further optimize the peripheral patches, taking the periphery as a whole, and the model volume is further reduced, but attribute information is lost, and the value of BIM informatization cannot be realized.

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