BIM model pipeline center line extraction method and device

Abstract

The invention provides a BIM model pipeline center line extraction method and device, and the method comprises the steps of extracting the edge of each pipeline in a BIM model, carrying out the cutting of the edges according to an included angle between any two edges with the same end point, and enabling a polygon formed by the cut edges to serve as the candidate section of each pipeline; performing plane approximation on the candidate sections, obtaining the maximum offset distance of plane approximation, and if the maximum offset distance is smaller than a preset threshold value, taking thecandidate sections as the sections of all the pipelines; and according to the center and the normal direction of the section of each pipeline, obtaining the center line of each pipeline. According tothe invention, the center line of the BIM model pipeline component can be accurately extracted, so that data compression of the pipeline component is realized, the graph of the pipeline component is concise and harmonious, and the operation efficiency of BIM application software is improved.

Description

technical field [0001] The invention relates to the technical field of BIM (Building Information Modeling, building information model) data processing, and in particular to a method and device for extracting a BIM model pipeline centerline. Background technique [0002] At present, digital buildings are playing an increasingly important role in daily life. A notable feature of digital architecture is the 3D model of the building involved. The amount of data is extremely large, and the problem is more prominent in chemical factories and super buildings with many 3D pipelines. [0003] The large volume of 3D models of construction pipelines leads to low operating efficiency of application software such as BIM construction, and is also one of the reasons why construction software graphics are not concise and harmonious. In this case, converting the Mesh triangle surface of the pipeline 3D model into a line model is a way to solve the data compression of the 3D pipeline model ...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method and device for extracting the center line of a BIM model pipeline, which is used to solve the defects that the three-dimensional model of the building pipeline in the prior art causes complex and disharmonious building graphics, and the operation efficiency of the BIM application software is low, and realizes the BIM model pipeline. Centerline extraction, compressed BIM model pipeline data

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