Method and system for lightening BIM model

Abstract

The invention discloses a method and a system for lightening a BIM (Building Information Modeling). The method comprises the following steps: reading component data in a BIM file through Revit software; the method is characterized by comprising the following steps: S1, attribute information lightweight: traversing components one by one, recording and analyzing the attribute information of the components, and expressing the attribute information of all the components as a digital serial number ID set for mapping and a character string dictionary table; storing in a component database; s2, geometric information lightweight: traversing the components one by one, and extracting a point set of outer frame polygons of surfaces forming the components; dividing all the components into a regular space geometry set and an irregular space geometry set; s3, classifying the regular space geometry set, and further dividing the regular space geometry set into a regular polygon pull-up geometry set and a regular cylinder set; and S4, classifying irregular space geometry sets, and further dividing the irregular space geometry sets into same space geometry sets and different space geometry sets.

Description

technical field [0001] The invention belongs to the technical field of building information model processing, and in particular relates to a method and system for reducing the weight of a BIM model. Background technique [0002] BIM (Building Information Modeling) technology is a digital tool applied to engineering design, construction and management. Through the integration of building data and information models, it can be shared in the whole life cycle of project planning, operation and maintenance. and transmission, so that engineering and technical personnel can correctly understand and efficiently respond to various building information, and provide a basis for collaborative work for the design team and all construction entities including construction and operation units. important role in terms of duration. Citing the definition of BIM from the National BIM Standard (NBIMS), the definition consists of three parts: (1) BIM is a digital representation of the physical a...

AI Technical Summary

Problems solved by technology

For example, the modification of the pipeline can be completed by modifying the center point coordinates and radius of the two circular faces of the pipeline; the shape of the regular geometry can be directly modified by modifying the shape of the geometry; the modification of the non-regular geometry can be completed by setting the offset , and if the above scheme needs to change the component information and geometric shape, the data must be re-exported in the Revit software, which takes more time

The LOD solution is just that the Revit software sets different fineness, the output GLTF format file size is different, there is no optimization method at the WEBGL display level, computers with different performances are all loaded with the same set of data, and display optimization strategies cannot be provided

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