DOI QR코드

DOI QR Code

IFC-based Data Structure Design for Web Visualization

IFC 기반 웹 가시화를 위한 데이터 구조 설계

  • 이대진 (인하대학교 정보통신공학과) ;
  • 최원익 (인하대학교 정보통신공학과)
  • Received : 2016.10.21
  • Accepted : 2017.01.17
  • Published : 2017.03.15

Abstract

When using IFC data consisting of STEP schema based on the EXPRESS language, it is not easy for collaborating project stakeholders to share BIM modeling shape information. The IFC viewer application must be installed on the desktop PC to review the BIM modeling shape information defined within the IFC, because the IFC viewer application not only parse STEP structure information model but also process the 3D feature construction for a 3D visualization. Therefore, we propose a lightweight data structure design for web visualization by parsing IFC data and constructing 3D modeling data. Our experimental results show the weight reduction of IFC data is about 40% of original file size and the web visualization is able to see the same quality with all web browsers which support WebGL on PCs and smartphones. If applied research is conducted about the web visualization based on IFC data of the last construction phase, it could be utilized in various fields ranging from the facility maintenance to indoor location-based services.

IFC 국제표준 규격은 EXPRESS 언어기반의 STEP 스키마 구조로 기술되어 있으므로 BIM 협업에 참여하는 주체자들이 BIM 모델링 형상정보를 공유하는데 접근성이 용이하지 않음을 확인할 수 있었다. IFC 내에 정의된 BIM 모델링 형상정보를 검토하기 위해서는 데스크탑 PC에 IFC 뷰어 어플리케이션을 설치하여 STEP 구조를 파싱하고 3D 가시화를 위한 형상구성 처리를 해야 하기 때문이다. 따라서 IFC 정보모델을 파싱하여 완전한 3D 모델링 형태의 정보구조로 변환하여 web 클라이언트에서 가시화가 용이하도록 경량화 데이터 구조로 설계하였으며, 실험결과 약 40%의 감량효과가 나타났으며, PC에서 스마트폰에 이르기까지 WebGL을 지원하는 모든 web browser에서 동일한 품질의 3D 렌더링 결과를 확인할 수 있었다. 시공 프로세스가 끝난 후 완성된 IFC 데이터를 기반으로 web 표준에 관한 응용연구를 진행한다면 일반 건축물의 유지관리에서 실내공간 위치기반 서비스에 이르는 여러 분야에 활용이 가능할 것이다.

Keywords

Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)

References

  1. Eastman, C. M., Jeong, Y. S., Sacks, R., & Kaner, I., "Exchange model and exchange object concepts for implementation of national BIM standards," Journal of Computing in Civil Engineering, Vol. 24, No. 1, pp. 25-34, 2009. https://doi.org/10.1061/(ASCE)0887-3801(2010)24:1(25)
  2. Choi, Don Chool, Shin, and Hye Mi, "A study on BIM-based information IFC4 standard format converter technology," Korea Science & Art Forum 19, pp. 669-677, 2015. (in Korean) https://doi.org/10.17548/ksaf.2015.03.19.669
  3. Laakso, Mikael, and A. O. Kiviniemi, "The IFC standard: A review of history, development, and standardization, information technology," ITcon, Vol. 17, No. 9, pp. 134-161, 2012.
  4. Kymmell, Willem, "Building Information Modeling: Planning and Managing Construction Projects with 4D CAD and Simulations," McGraw Hill Professional, 2007.
  5. buildingSMART International Modeling Support Group, "IFC 2x Edition 3 Model Implementation Guide," buildingSMART International Modeling Support Group, 2009.
  6. Barkmeyer, E. A., and Joshua Lubell(2000), "XML representation of EXPRESS models and data," Proc. of XML Technologies and Software Engineering workshop(Toronto), [Online]. Available: http://www.mel. nist.gov/msidlibrary/doc/xse2001.pdf (downloaded 2016, Oct. 11)
  7. The STEP Standard - ISO 10303, [Online]. Available: http://www.steptools.com/library/standard/step_1.html (downloaded 2016, Oct. 11)
  8. Alun Evans, Marco Romeo, Arash Bahrehmand, Javi Agenjo, Josep Blat, "3D graphics on the web: A survey," Computers & Graphics Vol. 41, pp. 43-61, Jun. 2014. https://doi.org/10.1016/j.cag.2014.02.002
  9. Marion, Charles, and Julien Jomier, "Real-time collaborative scientific WebGL visualization with WebSocket," Proc. of the 17th international conference on 3D web technology, pp. 47-50, 2012.
  10. Compare browsers, WebGL - 3D Canvas graphics [Online]. Available: http://caniuse.com/#feat=webgl, downloaded Oct. 21, 2016.
  11. Andreas Anyuru, "Professional WebGL Programming: Developing 3D Graphics for the Web," WROX, 2012.
  12. KHRONOS WebGL Specification - Context Creation [online]. Available: https://HYPERLINK "http://www.khronos.org/registry/webgl/specs/1.0/"\l"2.1"www.khronos.org/registry/webgl/specs/1.0/#2.1 (downloaded 2016, Aug.4)
  13. Meng Gai Peking, Guoping Wang, "Indoor3D: A WebGL based open source framework for 3D indoor maps visualization," Web3D '15 Proceedings of the 20th International Conference on 3D Web Technology, pp. 181-187, 2015.