BIM model surface reduction method based on vertex normal angle calculation

An angle calculation and model technology, applied in calculation, 3D modeling, instruments, etc., to achieve the effect of reducing the number and high degree of automation

Pending Publication Date: 2022-05-31
SHANGHAI TUNNEL ENGINEERING RAILWAY TRANSPORTATION DESIGN INSTITUTE
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] With the application and advancement of BIM technology, more and more large-scale engineering projects use BIM to promote the refined management of the project throughout the life

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  • BIM model surface reduction method based on vertex normal angle calculation
  • BIM model surface reduction method based on vertex normal angle calculation
  • BIM model surface reduction method based on vertex normal angle calculation

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Embodiment Construction

[0027] Below in conjunction with the accompanying drawings, the features of the present invention and other related features will be described in further detail by embodiments, so as to facilitate the understanding of those skilled in the same industry:

[0028] Example: as figure 1 , 2 As shown in , 3, this embodiment specifically relates to a BIM model surface reduction method based on vertex normal angle calculation, the BIM model surface reduction method optimizes triangular facet data and vertex data for a large-scale BIM model through a mathematical algorithm, Fundamentally reduce the number of triangles and vertices of the BIM model, and complete the lightweight processing of BIM model data, which includes the following steps:

[0029] (1) Through the public API of each BIM software, use a unified method to analyze and extract the data of the BIM model, and obtain the underlying data of the BIM model, including non-geometric data and geometric data, of which the non-ge...

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Abstract

The invention discloses a BIM (Building Information Modeling) surface reduction method based on vertex normal angle calculation, which is characterized in that triangular patch data and vertex data optimization is carried out on a large BIM through a mathematical algorithm, the number of triangular patches and the number of vertexes of the BIM are reduced fundamentally, and lightweight processing of BIM data is completed. The method has the advantages that effective and invalid surface patch and vertex data can be calculated and distinguished according to the original vertex and surface patch data of the BIM model and the lightweight level of the original vertex and surface patch data, and the effective and invalid surface patch and vertex data are automatically and reasonably processed, so that invalid model primitives are removed, the number of geometric elements of the model is reduced, and the efficiency is improved. The method has the advantages of high automation degree, difficulty in making mistakes, high processing speed and the like.

Description

technical field [0001] The invention belongs to the technical field of BIM, and in particular relates to a BIM model surface reduction method based on vertex normal angle calculation. Background technique [0002] With the application and advancement of BIM technology, more and more large-scale engineering projects use BIM in the whole life cycle to promote the refined management of the project. However, due to the limitation of software and hardware resources, the rapid loading and application of BIM models for large-scale engineering projects It has always been a pain point in the industry. Therefore, there is an urgent need for those skilled in the art for a method that can quickly load the BIM model and complete the lightweight processing of model data. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a BIM model surface subtraction method based on vertex normal angle calculation based on the shortcomings of the above-mentioned prio...

Claims

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Application Information

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IPC IPC(8): G06T17/00
CPCG06T17/00
Inventor 刘思铖辛佐先孟柯王燕峰施平望裴芳琼汲小涛姚晔俊
Owner SHANGHAI TUNNEL ENGINEERING RAILWAY TRANSPORTATION DESIGN INSTITUTE
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