Open type BIM cross-platform online visualization method based on WebGL

A cross-platform, open technology, applied in the direction of network data browsing optimization, image data processing, special data processing applications, etc., can solve the problems of heavy network load, unfriendly cross-platform compatibility, etc., to achieve maximum collaboration and information realization The effect of sharing

Active Publication Date: 2019-11-05
ZHONGBEI UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the deficiencies in the existing technology, solve the problems of excessive network load and unfriendly cross-platform compatibility in the existing BIM visualization process, the present invention provides a A cross-platform online visualization method for open BIM based on WebGL

Method used

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  • Open type BIM cross-platform online visualization method based on WebGL
  • Open type BIM cross-platform online visualization method based on WebGL
  • Open type BIM cross-platform online visualization method based on WebGL

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Embodiment Construction

[0045] An open BIM cross-platform online visualization method based on WebGL, comprising the following steps:

[0046] 1) Model conversion: Revit design model is converted into a lightweight BIM model;

[0047] S11. Traverse and analyze the entity information of the data segment of the IFC model file. The data segment information includes information such as the position, geometric performance, material, and basic attributes of each component of the building model;

[0048] Each entity in the data segment is expressed through attributes. The entity here refers to each # statement in the model file, including ObjectPlacement export attributes, Representation export attributes, HasAssociations anti-attributes, and IsdefinedBy anti-attributes.

[0049] S12. Analyzing the entity statement pointed to by the exported attribute of ObjectPlacement to obtain the location information of the building model component;

[0050] S13. Analyzing the entity statement pointed to by the derived...

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Abstract

An open type BIM cross-platform online visualization method based on WebGL comprises the following steps of traversing IFC file data segment entity information, and obtaining all objects forming a building model; obtaining all data information associated with the object by quoting and inheriting the relationship; carrying out geometric data processing on an object with geometric information, obtaining geometric information of a Revit geometry, carrying out calculation of geometric data, local coordinates and a matrix, and converting the Revit geometry into a parameterized geometry; conductingtriangularization processing on the surface of the parameterized geometry through a triangulation method, and finally converting the parameterized geometry into a triangular geometry; further carryingout lightweight processing on the triangular geometries, classifying all the triangular geometries according to the principle of dividing the members with the same geometrical shape and different positions into the same kind of members, and setting geometrical identifiers for the same kind of members; performing webGL data rendering.

Description

technical field [0001] The invention relates to the technical field of building information model visualization, in particular to an open BIM cross-platform online visualization method based on WebGL. Background technique [0002] BIM (Building Information Modeling) technology is a 3D digital technology applied to the whole process management of construction projects. It uses a common data format throughout the life cycle to create and collect all relevant information of the project and establish an information model for information coordination. Become the basis for project decision-making and a resource platform for information sharing. With the rapid development of the Internet and the maturity of HTML5 / WebGL technology, the construction of BIM visualization in the browser will broaden the application space of BIM technology. [0003] The commonly used BIM technology today is local BIM based on C / S architecture, which requires participants to use specific software progra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F16/957G06T17/20
CPCG06F16/957G06T17/20
Inventor 薛建英宁澎阎超刘洋廖金鹏张翼飞孟繁敏
Owner ZHONGBEI UNIV
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