Relevant bibliographies by topics / Boundary representation (BRep)

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  3. Conference papers

Academic literature on the topic 'Boundary representation (BRep)'

Author: Grafiati
Published: 3 June 2025
Last updated: 31 July 2025

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Journal articles on the topic "Boundary representation (BRep)"

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VANĚČEK, GEORGE. "BREP-INDEX: A MULTIDIMENSIONAL SPACE PARTITIONING TREE." International Journal of Computational Geometry & Applications 01, no. 03 (1991): 243–61. http://dx.doi.org/10.1142/s0218195991000189.

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In this paper we present the Brep-index, a multidimensional space partitioning data structure that provides quick spatial access to the vertices, edges and faces of a boundary representation (Brep), thus yielding a single unified representation for polyhedral solids. We give an algorithm for the construction of the Brep-index and prove its correctness. We show that its size is Ω(v+e+f), where v, e, and f are the number of vertices, edges, and faces of the Brep. The lower bound can be achieved for some Breps by compressing the structure using simple rewrite rules. We then demonstrate robust poi
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Jones, Benjamin, Dalton Hildreth, Duowen Chen, Ilya Baran, Vladimir G. Kim, and Adriana Schulz. "AutoMate." ACM Transactions on Graphics 40, no. 6 (2021): 1–18. http://dx.doi.org/10.1145/3478513.3480562.

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Assembly modeling is a core task of computer aided design (CAD), comprising around one third of the work in a CAD workflow. Optimizing this process therefore represents a huge opportunity in the design of a CAD system, but current research of assembly based modeling is not directly applicable to modern CAD systems because it eschews the dominant data structure of modern CAD: parametric boundary representations (BREPs). CAD assembly modeling defines assemblies as a system of pairwise constraints, called mates , between parts, which are defined relative to BREP topology rather than in world coor
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Stella, Orozco, Formella Arno, A. Cadavid Carlos, Ruiz Salguero Oscar, and Osorno Maria. "Geometry and Topology-based Segmentation of 2-Manifold Triangular Meshes in R3." British Journal of Applied Science & Technology 21, no. 1 (2017): 1–14. https://doi.org/10.9734/BJAST/2017/32827.

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This manuscript reports a geometrical and a topological methods to segment a closed triangular 2-manifold mesh M R3. The mesh M does not self-intersect) and has no border (i.e. watertight. Geometrical and topological segmentation methods require a Boundary Representation (BRep) fromM. Building the BRep forM uniforms the triangle orientations, and makes explicit triangle and edge - counter edge adjacency. In the context of Reverse Engineering, the sub-meshes produced by the segmentation are subsequently used to fit parametric surfaces, which are in turn trimmed by the sub-mesh boundaries (formi
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Zhang, Haowei, Si Sun, Heqing Lu, and Ying Liu. "CONSTRUCTION AND APPLICATION OF BREP PHANTOM FOR CHINESE WOMEN OF CHILDBEARING AGE IN RADIATION PROTECTION." Radiation Protection Dosimetry 189, no. 4 (2020): 407–19. http://dx.doi.org/10.1093/rpd/ncaa056.

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Abstract The purpose of this study is to construct boundary representation (BREP) phantom for Chinese women of childbearing age, to estimate the external radiation dose and to analyze radiation protection scheme. The BREP phantom for Chinese women of childbearing age was constructed by image segmentation, 3D reconstruction, non-uniform rational B-spline surface construction and voxelization. The photon-irradiated organ absorbed dose-conversion coefficients (DCCK) of the three female specific organs and the photon effective dose-conversion coefficient (ECCK) were calculated by Monte-Carlo metho
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Li, Yuan, and Bo Wu. "Relation-Constrained 3D Reconstruction of Buildings in Metropolitan Areas from Photogrammetric Point Clouds." Remote Sensing 13, no. 1 (2021): 129. http://dx.doi.org/10.3390/rs13010129.

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The complexity and variety of buildings and the defects of point cloud data are the main challenges faced by 3D urban reconstruction from point clouds, especially in metropolitan areas. In this paper, we developed a method that embeds multiple relations into a procedural modelling process for the automatic 3D reconstruction of buildings from photogrammetric point clouds. First, a hybrid tree of constructive solid geometry and boundary representation (CSG-BRep) was built to decompose the building bounding space into multiple polyhedral cells based on geometric-relation constraints. The cells th
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Huang, Ming, Xueyu Wu, Xianglei Liu, Tianhang Meng, and Peiyuan Zhu. "Integration of Constructive Solid Geometry and Boundary Representation (CSG-BRep) for 3D Modeling of Underground Cable Wells from Point Clouds." Remote Sensing 12, no. 9 (2020): 1452. http://dx.doi.org/10.3390/rs12091452.

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The preference of three-dimensional representation of underground cable wells from two-dimensional symbols is a developing trend, and three-dimensional (3D) point cloud data is widely used due to its high precision. In this study, we utilize the characteristics of 3D terrestrial lidar point cloud data to build a CSG-BRep 3D model of underground cable wells, whose spatial topological relationship is fully considered. In order to simplify the modeling process, first, point cloud simplification is performed; then, the point cloud main axis is extracted by OBB bounding box, and lastly the point cl
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Zankl, M., J. Becker, C. Lee, W. E. Bolch, Y. S. Yeom, and C. H. Kim. "Computational phantoms, ICRP/ICRU, and further developments." Annals of the ICRP 47, no. 3-4 (2018): 35–44. http://dx.doi.org/10.1177/0146645318756229.

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Phantoms simulating the human body play a central role in radiation dosimetry. The first computational body phantoms were based upon mathematical expressions describing idealised body organs. With the advent of more powerful computers in the 1980s, voxel phantoms have been developed. Being based on three-dimensional images of individuals, they offer a more realistic anatomy. Hence, the International Commission on Radiological Protection (ICRP) decided to construct voxel phantoms representative of the adult Reference Male and Reference Female for the update of organ dose coefficients. Further w
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Case, K., J. X. Gao, and N. N. Z. Gindy. "The Implementation of a Feature-Based Component Representation for CAD/CAM Integration." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 208, no. 1 (1994): 71–80. http://dx.doi.org/10.1243/pime_proc_1994_208_061_02.

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Recent research and development has the objective of increasing productivity and cost effectiveness by integrating many activities such as design, analysis, process planning, assembly planning and production planning which encompass the entire manufacturing planning and operational control aspects of a manufacturing enterprise. It has been recognized that a key to the integration lies in the determination of a representation scheme for products that can be interpreted for the various needs of these different applications. Geometric (solid) modellers were regarded by many researchers as the app
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Usmanov, Vjačeslav, Jan Illetško, and Rostislav Šulc. "Digital Plan of Brickwork Layout for Robotic Bricklaying Technology." Sustainability 13, no. 7 (2021): 3905. http://dx.doi.org/10.3390/su13073905.

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The trend of using modern technologies in the construction industry has been growing stronger recently, particularly in the fields of additive construction or robotic bricklaying. Therefore, specifically for the purpose of robotic bricklaying, we created a digital layout plan for robotic construction works. This article presents a universal methodology for creating a bricklaying plan for various variations of wall building systems. The method is based on the conversion of drawings from the BIM (Building Information Model) environment to the BREP (Boundary Representation) model through use of t
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Loeper, Yasmin, Markus Gerke, Ahmed Alamouri, Alexander Kern, Mohammad Shafi Bajauri, and Phillipp Fanta-Jende. "Visual localization in urban environments employing 3D city models." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVIII-2/W8-2024 (December 14, 2024): 311–18. https://doi.org/10.5194/isprs-archives-xlviii-2-w8-2024-311-2024.

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Abstract. Reliable pose information is essential for many applications, such as for navigation or surveying tasks. Though GNSS is a well-established technique to retrieve that information, it often fails in urban environments due to signal occlusion or multi-path effects. In addition, GNSS might be subject to jamming or spoofing, which requires an alternative, complementary positioning method. We introduce a visual localization method which employs building models according to the CityGML standard. In contrast to the most commonly used sources for scene representation in visual localization, s
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Dissertations / Theses on the topic "Boundary representation (BRep)"

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Sandqvist, Jonas. "Collision detection using boundary representation, BREP." Thesis, Umeå universitet, Institutionen för fysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-102531.

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This thesis treats how to generate collision information for multibody simulations in AgX Dynamicswhere the geometries are described with the data structure boundary representation, BREP. BREP is adata structure that contains the exact mathematical description of each individual surface. To describecomplex surfaces exact and efficient non uniform rational basis spline, NURBS, is used and for trivialsurfaces like planes or spheres simpler equations is used. Since all surfaces in a BREP is described veryaccurate, the accuracy for the collision information can be set high without affecting the am
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Aronsson, Oskar, and Julia Nyman. "Boundary Representation Modeling from Point Clouds." Thesis, KTH, Bro- och stålbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-278543.

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Inspections of bridges are today performed ocularly by an inspector at arm’s lengths distance to evaluate damages and to assess its current condition. Ocular inspections often require specialized equipment to aid the inspector to reach all parts of the bridge. The current state of practice for bridge inspection is therefore considered to be time-consuming, costly, and a safety hazard for the inspector. The purpose of this thesis has been to develop a method for automated modeling of bridges from point cloud data. Point clouds that have been created through photogrammetry from a collection of i
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Dang, Quoc Viet. "Similarités dans des Modèles BRep Paramétriques : Détection et Applications." Phd thesis, Toulouse, INPT, 2014. http://oatao.univ-toulouse.fr/12154/1/Dang_quoc_viet.pdf.

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Dans cette thèse, nous identifions et exploitons des similarités partielles dans des objets 3D pour répondre à des besoins courants du domaine de la Conception Assistée par Ordinateur (CAO). De nouvelles méthodes sont introduites, d'une part pour détecter les similarités partielles, d'autre part pour utiliser ces similarités dans des applications spécifiques telles que l'édition de forme, la compression et l'indexation d'objets 3D. Grâce au développement des applications de la modélisation géométrique, ces modèles sont de plus en plus nombreux et sont disponibles à travers plusieurs modalités.
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Crozet, Sébastien. "Efficient contact determination between solids with boundary representations (B-Rep)." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAM089/document.

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Avec le développement de systèmes robotiques avancés et de tâches de téléopération complexes, le besoin pour la réalisation de simulations en amont des opérations sur les systèmes réels se fait de plus en plus ressentir. Cela concerne en particulier les tests de faisabilité, d’entrainement d’opérateurs humains, de planification de mouvement, etc. Ces simulations doivent généralement être réalisées avec une précision importante des phénomènes physiques, notamment si l’opérateur humain est supposé faire face aux mêmes comportements mécaniques dans le monde réel que sur la scène virtuelle. La dét
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Conference papers on the topic "Boundary representation (BRep)"

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Lou, Yunzhong, Xueyang Li, Haotian Chen, and Xiangdong Zhou. "BRep-BERT: Pre-training Boundary Representation BERT with Sub-graph Node Contrastive Learning." In CIKM '23: The 32nd ACM International Conference on Information and Knowledge Management. ACM, 2023. http://dx.doi.org/10.1145/3583780.3614795.

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Faas, Daniela, and Judy M. Vance. "BREP Identification During Voxel-Based Collision Detection for Haptic Manual Assembly." In ASME 2011 World Conference on Innovative Virtual Reality. ASMEDC, 2011. http://dx.doi.org/10.1115/winvr2011-5524.

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This paper presents a novel method to tie geometric boundary representation (BREP) to voxel-based collision detection for use in haptic manual assembly simulation. Virtual Reality, in particular haptics, has been applied with promising results to improve preliminary product design, assembly prototyping and maintenance operations. However, current methodologies do not provide support for low clearance assembly tasks, reducing the applicability of haptics to a small subset of potential situations. This paper discusses a new approach, which combines highly accurate CAD geometry (boundary represen
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Luu, Thu Huong, Christian Altenhofen, André Stork, and Dieter Fellner. "GraMMaCAD: Interactively Defining Spatially Varying FGMs on BRep CAD Models." In ASME 2022 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/detc2022-89552.

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Abstract Additive manufacturing (AM) has enabled control over heterogeneous materials and structures in ways that were not previously possible, including functionally graded materials (FGM). However, typical computer aided design (CAD) systems — mainly based on boundary representations (B-Rep) — are not built for modeling and representing spatially varying material information, which are the key features for designing FGM parts. While volumetric representations (V-Rep) such as tetrahedral or hexahedral meshes, trivariate splines or subdivision solids can hold the necessary FGM information, the
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