IFCCompressor: A content-based compression algorithm for optimizing Industry Foundation Classes files

Sun, Jing; Liu, Yu‐Shen; Gao, Ge; Han, Xiaoguang

doi:10.1016/j.autcon.2014.10.015

Cited by 35 publications

(19 citation statements)

References 13 publications

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“…Section Rigid Body Transformation Estimation) analyses and improves the affected models. Simultaneously, the affected models are also processed using the Solibri IFC Optimizer (Solibri Inc. 2015) as well as the IFCCompressor (Sun et al 2015). The processed models are compared against the original model, against the models processed by the existing optimizers, and against a prototype shared model.…”

Section: Resultsmentioning

confidence: 99%

“…While the exact method is corporate secret, Pazlar & Turk (2007) have empirically determined, that the Solibri Ifc Optimizer merges equivalent data and updates corresponding references. Instead, Sun et al (2015) published an open-source solution called IFCCompressor, which produces similar results and which works independently of a certain IFC schema. For both solutions, it can be noticed that a kind of flyweight pattern is reproduced from duplicated instances.…”

Section: Related Workmentioning

confidence: 99%

“…When passing multiple import and export stages, several reports (Backas 2001;Fischer and Calvin 2002;Bazjanac 2002;Pazlar and Turk 2006) have observed that it can lead to an unmanageable amount of data. Amongst other reasons, including adding unused instances, Sun et al (2015) demonstrated that the bloat is mainly driven by producing redundant geometries for identical types of building elements, such as windows, doors, or columns. Because in BIM models data integrity is of crucial importance, it is supposed that many IFC software neglect the demand of model efficiency.…”

Section: Introductionmentioning

confidence: 99%

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Removing duplicated geometries in IFC models using rigid body transformation estimation and flyweight design pattern

2018

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Background: The digital process of Building Information Modeling (BIM) involves the creation and modification of CAD-based building models. The complexity of such models has been increasing steadily within the last few years. BIM Models are usually being exchanged using open and standardized data formats. In this context, the Industry Foundation Classes (IFC) are widely used. Therefore, software vendors provide interfaces for dealing with the IFC format. To obtain a high level of data integrity, however, IFC elements are often managed as completely distinct entities, which can result in the creation of multiple copies of identical pieces of information. Since the trend to provide web-based solutions for BIM applications is also becoming increasingly important, especially the conflict between available resource consumption and suitable response times must be considered. Although existing optimization algorithms can reduce the size of an IFC file by analyzing its structure syntactically, there is still the gap to detect identical pieces of geometries that are syntactically distinct. Also, when subsequently merging such geometries, the available sharing concepts must be questioned. Methods: The contribution of this paper is twofold. On the one hand, we propose an algorithm to retrospectively detect identical geometries by estimating the rigid body transformation. On the other hand, we outline and evaluate the available possibilities for sharing geometries within the IFC data model. The so-called flyweight pattern is applied to provide and maintain the appropriate reuse of identical information.

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Section: Resultsmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Removing duplicated geometries in IFC models using rigid body transformation estimation and flyweight design pattern

2018

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“…Specifically, industry foundation classes (IFC) is an open and neutral data format specification for BIM [2,3] that describes building and construction industry data and facilitates interoperability between BIM applications. IFC files can be imported or exported through most *Correspondence: liuyushen@tsinghua.edu.cn 1 School of Software, Tsinghua University, Beijing 100084, China 2 Beijing National Research Center for Information Science and Technology (BNRist), Beijing 100084, China Full list of author information is available at the end of the article market-leading BIM software [4]. Recently, studies developed various IFC-based approaches and applications (e.g., refs.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, studies developed various IFC-based approaches and applications (e.g., refs. [4][5][6][7][8][9]).…”

Section: Introductionmentioning

confidence: 99%

Dynamically loading IFC models on a web browser based on spatial semantic partitioning

Liu

et al. 2019

Vis. Comput. Ind. Biomed. Art

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Industry foundation classes (IFC) is an open and neutral data format specification for building information modeling (BIM) that plays a crucial role in facilitating interoperability. With increases in web-based BIM applications, there is an urgent need for fast loading large IFC models on a web browser. However, the task of fully loading large IFC models typically consumes a large amount of memory of a web browser or even crashes the browser, and this significantly limits further BIM applications. In order to address the issue, a method is proposed for dynamically loading IFC models based on spatial semantic partitioning (SSP). First, the spatial semantic structure of an input IFC model is partitioned via the extraction of story information and establishing a component space index table on the server. Subsequently, based on user interaction, only the model data that a user is interested in is transmitted, loaded, and displayed on the client. The presented method is implemented via Web Graphics Library, and this enables large IFC models to be fast loaded on the web browser without requiring any plug-ins. When compared with conventional methods that load all IFC model data for display purposes, the proposed method significantly reduces memory consumption in a web browser, thereby allowing the loading of large IFC models. When compared with the existing method of spatial partitioning for 3D data, the proposed SSP entirely uses semantic information in the IFC file itself, and thereby provides a better interactive experience for users.

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A Survey About BIM Interoperability and Collaboration Between Design and Construction

Sattler

Lamouri

Pellerin

et al. 2021

Service Oriented, Holonic and Multi-Agent Manufacturing Systems for Industry of the Future

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IFCCompressor: A content-based compression algorithm for optimizing Industry Foundation Classes files

Cited by 35 publications

References 13 publications

Removing duplicated geometries in IFC models using rigid body transformation estimation and flyweight design pattern

Removing duplicated geometries in IFC models using rigid body transformation estimation and flyweight design pattern

Dynamically loading IFC models on a web browser based on spatial semantic partitioning

A Survey About BIM Interoperability and Collaboration Between Design and Construction

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