LOFTING-BASED SHAPE SIMPLIFICATION OF BUILDING MODELS USING VOXELIZATION
Takashi Michikawa1, Tomohiro Fukuda2 and Nobuyoshi Yabuki3
1) Dr. Eng., Assist. Prof., Center for Environmental Innovation Design for Sustainability, Osaka University, Suita, Osaka, JAPAN.
2) Dr. Eng., Assoc. Prof., Department of Sustainable Energy and Environmental Engineering, Osaka University, Suita, Osaka, JAPAN.
3) Ph.D., Prof., Department of Sustainable Energy and Environmental Engineering, Osaka University, Suita, Osaka, JAPAN.
Abstract: This paper presents a method for simplifying polygon data created from building information modeling (BIM) data. BIM data contain not only the external appearance, but also internal structures such as stairs and interior walls. Our method is to remove these structures while preserving the external appearance. The main idea of this method is to use voxelization of the polygon data to remove internal structures. Simplified polygons are reconstructed by lofting the contours of the intersections. Then, redundant contours are culled to reduce the number of polygons. This paper demonstrates that several examples of buildings with complicated structures can be well simplified.
Keywords: Polygon data, Surface simplification, BIM data, Voxelization, Lofting, Similarity analysis
Takashi Michikawa, Tomohiro Fukuda, and Nobuyoshi Yabuki. “LOFTING-BASED SHAPE SIMPLIFICATION OF BUILDING MODELS USING VOXELIZATION.” In Proceedings of International Conference on Civil and Building Engineering Informatics (ICCBEI 2015), 103. Tokyo, Japan, 2015.