2020 Fiscal Year Final Research Report
Automatic Generation of detailed 3D Building Models for BIM (Building Information Model)
| Project/Area Number |
18K04523
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 23030:Architectural planning and city planning-related
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| Research Institution | Gifu Kyoritsu University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
沈 振江 金沢大学, 地球社会基盤学系, 教授 (70294543)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Keywords | 自動生成 / ３次元建物モデル / ３Ｄモデル / ＣＧ / ＧＩＳ / ＢＩＭ / 建物ポリゴン分割 / 動的3次元建物モデルの自動生成 |
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| Outline of Final Research Achievements |
Purpose: Architectural design world is experiencing a rapid shift from 2D CAD drawings to BIM 3D modellings. However, creating 3D models are labor-intensive. We aim at automatically generates 3D building models, based on building footprints (building polygons). The proposed system partitions building polygons into a set of quadrilaterals (quads) and rectifies them, placing rectangular roofs and box-shaped bodies on quads. This is done by quads’ vertices numbering by our labelling rule. Findings: By our labelling rule, it is possible for each quad to know which quad is adjacent to and which edge of the quad is adjacent to, resulting in finding ‘window and door available’ (WDA) walls. Originality: Our system implements polygon partitioning, rectification, adjacency clarification and 3D CSG (Constructive Solid Geometry) model generation, which has the advantage over the surface models generated by procedural modelling. They can be utilized for various engineering simulation.
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| Free Research Field |
コンピュータ科学、コンピュータ幾何学、ＣＧ、ＧＩＳ
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| Academic Significance and Societal Importance of the Research Achievements |
これまでの研究の「３次元建物モデルの自動生成」で独自に開発した、コンピュータ幾何学の分野となる「ポリゴンの分割手法」や「ストレートスケルトン手法による直線状骨格生成、及びポリゴンの単調増加(monotone)ポリゴンへの分割」を発展させて、電子地図上の建物境界線から、枝屋根や間取りの分割を行い、「建物枝部が分割された窓設置可能な壁が明確化された詳細な建物の３Ｄモデル」を自動生成することに成功した。 研究成果の学術的意義は、「コンピュータ幾何学の新しいアルゴリズム」を開発し、BIM普及の障害になっている多大な３Ｄモデル作成工数の削減に取り組んだことである。
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