Cumincad : CUMINCAD Papers : Search Results

CumInCAD is a Cumulative Index about publications in Computer Aided Architectural Design
supported by the sibling associations ACADIA, CAADRIA, eCAADe, SIGraDi, ASCAAD and CAAD futures

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_id	2006_384
id	2006_384
authors	Koutamanis, Alexander
year	2006
title	Recognizing architectural representations
doi	https://doi.org/10.52842/conf.ecaade.2006.384
source	Communicating Space(s) [24th eCAADe Conference Proceedings / ISBN 0-9541183-5-9] Volos (Greece) 6-9 September 2006, pp. 384-391
summary	The paper presents an overview of mechanisms underlying architectural perception and recognition. These include both general perceptual principles and specific domain constraints. The former determine the objective identification of elements and relationships in any visual scene, while the latter make architectural styles recognizable even to perceivers without extensive acquaintance with architecture. This is because many of the architectural constraints underlying a style have a firm foundation in general principles.
keywords	Representation; recognition; perception; architectural style
series	eCAADe
email
last changed	2022/06/07 07:51

_id	ecaade2007_039
id	ecaade2007_039
authors	Koutamanis, Alexander
year	2007
title	Matching Representation to Perception
doi	https://doi.org/10.52842/conf.ecaade.2007.551
source	Predicting the Future [25th eCAADe Conference Proceedings / ISBN 978-0-9541183-6-5] Frankfurt am Main (Germany) 26-29 September 2007, pp. 551-558
summary	Visual representations play an important role in mobile architectural guides, especially with respect to the identification of buildings, i.e. matching internal representations to external ones (the documentation in the guide) and the perceived scene. By restructuring this documentation into networks of significant architectural entities and features a guide is enriched with flexible, economical means for supporting building identification under the typically variable conditions architectural travelers have to endure.
keywords	Mobile computing, architectural guide, representation, perception, recognition
series	eCAADe
email
last changed	2022/06/07 07:51

_id	ijac20108208
id	ijac20108208
authors	Koutamanis, Alexander
year	2010
title	W.J. Mitchell - In Celebration of An Approach
source	International Journal of Architectural Computing vol. 8 - no. 2, 223-231
summary	Among the founding fathers of architectural computing, the late W.J. Mitchell was arguably the one who managed to capture the imagination of the younger generations through overviews and insights that described the backgrounds and scope of the area in a way that was suitable for novices as well as people outside the area. Calling such overviews successful popularization is only part of the truth. More importantly, they formulate a coherent and comprehensive approach that allowed Mitchell to move between eras and contexts without loosing focus or sacrificing fundamental priorities. It is an approach that remains valid and usable, a source of inspiration and understanding for future generations in the area.
series	journal
last changed	2019/05/24 09:55

_id	49fc
id	49fc
authors	KOUZELEAS Stelios, SEMIDOR Catherine
year	2001
title	THE INFLUENCE OF THE SIMPLIFIED ARCHITECTURAL MODEL ON THE ACOUSTICAL SIMULATION RESULTS
source	17th International Congress on Acoustics, Proceedings : Vol. III - Architectural acoustics - Opera house acoustics - p. 46-47 – ISBN : 88-88387-02-1, 2-7 Septembre 2001, Rome, Italy
summary	The sometimes complex architectural shape of halls creates modelling difficulties as the simulation computing systems need plane surfaces. In order to approach a perfect shape of curved surfaces, a big number of facets is necessary. This poses, as a consequence, computer memory problems which is the case of the horse shoe shaped Opera House with its richly decorated columns, balconies, etc. This paper compares the acoustical measurement results and the calculation results of a computer simulation software applied on several models (from the most simple till the most complex ones) of the Grand Theatre of Bordeaux.
keywords	Acoustics simulation, CAD modeling, room acoustics, architectural model simplification
series	other
type	normal paper
email
more	http://ims-ism.nrc-cnrc.gc.ca/ica/proceedg.html
last changed	2005/10/24 19:59

_id	2961
id	2961
authors	KOUZELEAS Stelios
year	2004
title	COMPUTATIONAL PROCESSES OF A HALL CAD MODELISATION FOR ACOUSTIC SIMULATION ACCORDING TO ACCEPTED GEOMETRY FORMAT VIA ACOUSTIC SOFTWARE
source	1st International Conference “From Scientific Computing to Computational Engineering” (IC-SCCE), 8-10 September 2004, Athens, Greece
summary	The acoustic computational simulation presents many advantages but at the same time there are some limits corresponding, among others, to the modelisation of the hall geometry. The integrated modelers of geometry of the halls in the acoustic simulation software are based especially on the programming code modelisation via text editors of coordinate points and not on the graphical modelisation, as the CAD software is. In cases of complex architectural shapes of halls, the majority of the acoustic simulation software imperatively needs to import a model from a CAD software. However, the modelisation of the geometry of the hall must take into account several criteria in order to run in an acoustic simulation software, and optimize the calculation results, such as the plane surfaces, the limited number of surfaces in some cases, the elimination of the unnecessary elements, the accepted geometry model format, etc. This paper explains the description and the particularities of three different modelisation processes of the Architectural School Amphitheater of Bordeaux in a CAD system in order to be adequate for acoustic simulation via acoustic software, such as ASCII, dxf and normals orientation model formats. It also presents computer automatization aspects of these processes integrated in a plate-form adaptable to a CAD system named “CAD-Acoustic.” These modelisation processes can also be a helpful tool during the architectural conception of the acoustic hall.
keywords	CAD modelisation process, Architectural acoustics, Acoustic simulation
series	other
type	normal paper
email
more	http://ic-scce.upatras.gr/
last changed	2005/10/25 09:47

_id	999e
id	999e
authors	KOUZELEAS Stelios
year	2004
title	APPLICATIONS OF ACOUSTIC AND GEOMETRIC SIMULATION OF HALLS WITH THE AID OF WITH THE AID OF ACOUSTIC SIMULATION PLATE-FORM ADAPTABLE IN A CAD SYSTEM. - (EFARMOGES AKOUSTIKHS KAI GEWMETRIKHS PROSOMOIOSHS AITHOUSWN ME TH BOHTHEIA PLATFORMAS AKOYSTIKHS PROSOMOIOSHS PROSARMOSMENHS SE SYSTHMA CAD)
source	Acoustics 2004, Hellenic Institute of Acoustics (HELINA), Aristotle University of Thessaloniki, 27-28 September 2004, Greece
summary	(pdf file in greek)- With the aid of the acoustic simulation plate-form named « CAD-Acoustic » which is developed in the context of PhD and adapted on the AutoCAD system, this paper presents the halls acoustic results (RT60) of Elmia (Sweden) and Opera of Bordeaux (France) in relation to acoustic measurements and results of other acoustic simulation software (Odeon, Epidaure). In parallel, it presents geometrical simulations of the modelised halls’ acoustic behavior, such as the 3D reflections of the acoustic rays from selected surface, the 3D view of the materials’ arrangements through surfaces’ coloring, the measurement of the selected absorbing / reflecting surfaces in m2 and the individual or massive absorption coefficients’ assignment to the surfaces. Finally, with the aid of « CAD-Acoustic » the acoustic results are compared in a graphic manner in relation to the ideal acoustic rates, a presentation which is a kind of an “ architectural translation of the acoustic results” taking into account several architectural elements.
keywords	CAD modeling, "CAD-Acoustic" software developement, Architectural acoustic simulation
series	other
type	normal paper
email
more	http://www.helina.gr/
last changed	2005/10/25 11:22

_id	a38d
id	a38d
authors	KOUZELEAS Stelios
year	2007
title	CONVERSION OF GPS DATA TO CARTESIAN COORDINATES VIA AN APPLICATION DEVELOPMENT ADAPTED TO A CAD MODELLING SYSTEM
source	2nd International Conference on Experiments/Process/System Modelling/Simulation & Optimization (2nd IC-EpsMsO), Athens, 4-7 July, 2007
summary	Nowadays, common methodologies in telegeoprocessing–telegeomonitoring use telecommunication means such as the GPS in order to transmit geographical coordinates to modelling and simulation systems. These 3D geodetic coordinates (φ, λ, h) can be used by modeling systems via specifics interfaces in order to proceed to real-time modelling of the remotely transmitted data. A previous published work describes a real-time remote 3D digitizing and modelling procedure via transmitted Global Positioning System (GPS) data from the field towards to a CAD system. However, these GPS data must be converted to adequate coordinate’s format (x, y, z) so that the CAD system can use them. This paper presents the computing development of a specific application adapted to a CAD modelling system permitting the conversion of the geodetic coordinates to cartesian coordinates. It presents the relation between geodetic and cartesian coordinates, the options of the final developed application and finally some schematic aspects of the computing process. The application development is realized in AutoCAD modelling system environment via special developed interface in Visual Basic (VBA) and Visual Lisp programming language. The aim of this work is to give the possibility to a CAD modelling system to “translate” and receive automatically geographical coordinates or to convert manually and selectively geodetic coordinates φ, λ, h to cartesian coordinates x, y, z.
keywords	Coordinates conversion ; CAD development ; GPS data ; CAD modelling and simulation
series	other
type	normal paper
email
more	http://www.epsmso.gr/2nd_EpsMsO_2007/Frame_page.htm
last changed	2007/10/19 17:48

_id	diss_kouzeleas
id	diss_kouzeleas
authors	Kouzeleas, S.
year	2002
title	DEVELOPMENT OF A HELP TOOL IN ARCHITECTURAL ACOUSTICS SIMULATION ADAPTABLE IN A MODELISATION CAD SYSTEM
source	Ph.D. Thesis, Order number 2642, University of Bordeaux 1, 2002, France
summary	The aim of the proposed research in this thesis is the rapprochement of the acoustical conception and simulation with the architectural conception in order to give the architect the means to appreciate and evaluate the acoustical results, facilitate his collaboration with the acoustician, and, finally, allow him to have a help base during his architectural conception for acoustical simulation. This is proposed by the realisation of a plate-form of help adaptable to an architectural modelisation C.A.D. program, integrating acoustical calculate motors, graphical modules and research developed. This research concerns the definition of different processes of modelisation and simplification of architectural models for acoustical simulation, the translation of the acoustical results in an architectural way, the integration of an architectural approach to the acoustical conception, and an acoustical integrated multimedia database.
keywords	architectural acoustics, acoustics simulation, acoustics conception, architectural
series	thesis:PhD
type	normal paper
email
last changed	2005/10/17 21:57

_id	2006_128
id	2006_128
authors	Kouzeleas, Stelios Th. and Kimon D. Papadimitriou
year	2006
title	Real-time remote 3D digitizing and modelling
doi	https://doi.org/10.52842/conf.ecaade.2006.128
source	Communicating Space(s) [24th eCAADe Conference Proceedings / ISBN 0-9541183-5-9] Volos (Greece) 6-9 September 2006, pp. 128-131
summary	This paper describes a procedure that feeds remotely a modelling system with geographical coordinates and the relative measurements taken in place in order to model dynamically new entities in real-time. The operation of this system is based on methodologies that are commonly used in telegeoprocessing – telegeomonitoring systems and its purpose is to simulate in real-time an existing environment using the captured measurements. The direct input of geographic data to the proposed system, which is adapted to a modelling environment (CAD or GIS), triggers the creation of new 3D entities in real-time (points, linear or area features), as it could be done with a traditional tablet digitizer. Simultaneously, the proposed system represents thematically the properties of the modelling entities (according to the measured values) over a 3D mesh. The aim of the suggested system is the remote registration of additional spatial information, their adequate treatment and adjustment via special developed interfaces, including their representation via developed software which is applied in the AutoCAD environment because of its programming development support and its use by a variety of engineers.
keywords	Real-time modelling; Digitizing; Cartographic simulation; GIS
series	eCAADe
email
last changed	2022/06/07 07:52

_id	ecaade2020_201
id	ecaade2020_201
authors	Kovaøík, David, Tsikoliya, Shota, Vaško, Imrich, Sviták, Daniel and Fri?riksson, ?órbergur
year	2020
title	Vibrant Formations - Geometries and dynamic material systems
doi	https://doi.org/10.52842/conf.ecaade.2020.1.281
source	Werner, L and Koering, D (eds.), Anthropologic: Architecture and Fabrication in the cognitive age - Proceedings of the 38th eCAADe Conference - Volume 1, TU Berlin, Berlin, Germany, 16-18 September 2020, pp. 281-288
summary	The project Vibrant Formations presents a series of experiments based on the research of the behavior of granular materials. The experiments shown in the paper are seen as a link between native material geometries and designed geometries. The project perceives granular materials as an intelligent matter capable of creating distinct patterns and actively responding to the environment they are placed in. This attitude towards material positions the project in an opposition to standard 3D printing technologies, where materials are seen as a proto-matter that acquires its properties and capabilities first after being formed into computed geometries and 3D printed shapes. The project Vibrant Formations explores material properties of different granular materials and processes and materializes their behavior. It works with the phenomenon called "granular segregation" to achieve specific objects connected to material logic which resemble frozen, digitally simulated particle systems. The material properties found in the research are further utilized. The process of granular segregation is investigated and material geometries replaced by fabricated geometries. This leads to a semi-automatised interlocking system capable of assembling and disassembling.
keywords	granular material; material behaviour; self-assembly; material assembly
series	eCAADe
email
last changed	2022/06/07 07:52

_id	ecaade2015_140
id	ecaade2015_140
authors	Kowal, Slawomir; Koszewski, Krzysztof, Slyk, Jan and Wrona, Stefan
year	2015
title	Parametric Methods in Reconstruction of the Medieval Proto-Town in Pultusk, Poland
doi	https://doi.org/10.52842/conf.ecaade.2015.1.695
source	Martens, B, Wurzer, G, Grasl T, Lorenz, WE and Schaffranek, R (eds.), Real Time - Proceedings of the 33rd eCAADe Conference - Volume 1, Vienna University of Technology, Vienna, Austria, 16-18 September 2015, pp. 695-700
summary	This paper describes methods, processes and the outcome of the reconstruction in the medieval wooden settlement complex in Pultusk, Poland. It is the result of the interdisciplinary cooperation between architects from Warsaw University of Technology and archaeologists from Regional Museum of Pultusk. They have undertaken the research issues of information exchange and knowledge-building processes in the digital environment. Main issues were related to the methods of computer reconstruction in architectural and urban scale, which enable alternative narrative threads. To achieve this, parametric techniques were adopted and the 'Pultusk Recontructor' application was developed in Grasshopper. The interaction between architects and archaeologists over hypotheses and alternatives was supported in urban scale by 'Rapid Reconstruction Modular Model'. This 3D printed urban model, consist of segments which can be simultaneously exchanged. It became not only a substrate for scientific debate, but also may serve an education role for the permanent Museum exhibition.
wos	WOS:000372317300075
series	eCAADe
email
more	https://mh-engage.ltcc.tuwien.ac.at/engage/ui/watch.html?id=21013e32-702a-11e5-99b6-d34246563b4e
last changed	2022/06/07 07:51

_id	kozlov02_paper_eaea2007
id	kozlov02_paper_eaea2007
authors	Kozlo, Dmitri
year	2008
title	Topological Method of Construction of Point Surfaces as Physical Models
source	Proceedings of the 8th European Architectural Endoscopy Association Conference
summary	The shape of architectural objects in general can be treated as an envelope – a two dimensional surface embedded into three dimensional space. We directly perceive only the surface as a synthesis of sequential “photo snaps” – the two dimensional imprints on a retina – a concave screen inside of our eyes. In 15th century Italian architect and theorist L. B. Alberti claimed that the architecture consists in the outlines and the structure (lineamenta et structura in the original Latin text). The visible shape (outlines) exists only because a directly not perceived structure determines it. Like Alberti, the modern mathematical theories of form distinguish the shape as an exterior surface and the form itself as an internal structure. This subtle difference becomes a very important subject in the relationship between a virtual and a physical model in the studies of architectural endoscopy.
keywords	topology, manifold, knots, point surface, physical model
series	EAEA
email
more	http://info.tuwien.ac.at/eaea
last changed	2008/04/29 20:46

_id	8ca1
authors	Kozlowsky Jan and Sliwinsky, Jacek
year	1996
title	CAD is Creative
source	CAD Creativeness [Conference Proceedings / ISBN 83-905377-0-2] Bialystock (Poland), 25-27 April 1996 pp. 163-167
summary	There is an avalanche increase in number of architectonic offices in which the CAD technique is a medium used in the process of projecting. Ways of using CAD programs and computers are the personal matter of every user. The problem we faced was how to use it in creative work. The most interesting moment in process of projecting is the time when the set of lines on computer screen changes in mind into the real architectonic object. The form generated on the screen is new and inspire to farther, this time creative search. We must say that CAD technique let us achieve creativity during projects which means that ability to projects of new things and that state increase together with the increase of using this tool and we consider the claim that CAD may be used in a creative way.
series	plCAD
last changed	1999/04/09 15:30

_id	sigradi2023_55
id	sigradi2023_55
authors	Koçer Özgün, Feyza Nur and Alaçam, Sema
year	2023
title	Understanding the User Interfaces Through Spatial Metaphors
source	García Amen, F, Goni Fitipaldo, A L and Armagno Gentile, Á (eds.), Accelerated Landscapes - Proceedings of the XXVII International Conference of the Ibero-American Society of Digital Graphics (SIGraDi 2023), Punta del Este, Maldonado, Uruguay, 29 November - 1 December 2023, pp. 1573–1584
summary	This study focuses on spatial metaphors in digital interfaces that designers use in their modeling processes. When designers themselves perform an action by using a digital tool, they often make spatial inferences without realizing it, with the help of their mental models and established modeling experiences. In order to trace these implicit spatial metaphors, the spatial metaphors used by the designers were discussed through their verbal expressions. Within the scope of the pilot case study, the participants told each other the 3D models given to them verbally, and the other participant made the 3D model simultaneously with the narrative. The metaphors that the participant in the role of the narrator used with the intention of making a spatial description allowed the participant in the role of the modeler to build spatial relations. This study, which has the potential to provide a spatial framework for interfaces in the future, is a step toward designing new user interface metaphors.
keywords	Spatial metaphors, User interface, UI metaphors, Modeling process, Human-computer interaction
series	SIGraDi
email
last changed	2024/03/08 14:09

_id	9c76
authors	Krawczyk, Robert J.
year	2001
title	More curved spirolaterals
source	Mathematical Connections In Art, Music, and Science
summary	Spirolaterals are square spirals constructed of straight lines of increasing length. This paper investigates methods that can be used to transform their straight line turns into curves. From the tens of thousands of possible spirolaterals which have been found, that are all closed, with and without reversed turns, a series of artworks is developed showing possible curving methods: curve fitting, splines, inversion, antiMercator and circular transformations, along with hypocycloid and epicycloid curves. These transformations are implemented using CAD methods and custom software. A series of parameters are discussed which generate a variety of artwork.
series	other
email
last changed	2003/04/23 15:50

_id	ecaade2015_271
id	ecaade2015_271
authors	Kreutzberg, Anette
year	2015
title	Conveying Architectural Form and Space with Virtual Reality
doi	https://doi.org/10.52842/conf.ecaade.2015.1.117
source	Martens, B, Wurzer, G, Grasl T, Lorenz, WE and Schaffranek, R (eds.), Real Time - Proceedings of the 33rd eCAADe Conference - Volume 1, Vienna University of Technology, Vienna, Austria, 16-18 September 2015, pp. 117-124
summary	The purpose of this study was to explore the user experience of non-specialists viewing and navigating in an architectural native (Revit) BIM model in Virtual Reality (VR) with a head mounted display (HMD). The perceived sense of presence as well as the quality of vision and total VR experience was examined and also compared with standard computer screen display. The study shows that conveying architectural form and space to non-specialists can be done with reasonable good results with the use of present time real-time rendered BIM models in VR even if the HMD is not calibrated individually. The study also shows that development of VR hardware and real-time render software as well as the practical use must be further developed to fully utilize the VR potential.
wos	WOS:000372317300013
series	eCAADe
email
more	https://mh-engage.ltcc.tuwien.ac.at/engage/ui/watch.html?id=7d2df70c-702c-11e5-a756-67dba6a9858a
last changed	2022/06/07 07:51

_id	ecaade2016_057
id	ecaade2016_057
authors	Kreutzberg, Anette
year	2016
title	High quality Virtual Reality for Architectural Exhibitions
doi	https://doi.org/10.52842/conf.ecaade.2016.2.547
source	Herneoja, Aulikki; Toni Österlund and Piia Markkanen (eds.), Complexity & Simplicity - Proceedings of the 34th eCAADe Conference - Volume 2, University of Oulu, Oulu, Finland, 22-26 August 2016, pp. 547-554
summary	This paper will summarise the findings from creating and implementing a visually high quality Virtual Reality (VR) experiment as part of an international architecture exhibition. It was the aim to represent the architectural spatial qualities as well as the atmosphere created from combining natural and artificial lighting in a prominent not yet built project. The outcome is twofold: Findings concerning the integration of VR in an exhibition space and findings concerning the experience of the virtual space itself. In the exhibition, an important aspect was the unmanned exhibition space, requiring the VR experience to be self-explanatory. Observations of different visitor reactions to the unmanned VR experience compared with visitor reactions at guided tours with personal instructions are evaluated. Data on perception of realism, spatial quality and light in the VR model were collected with qualitative and quantitative methods at two different occasions and setups after the exhibition, both showing a high degree of immersion and experience of reality.
wos	WOS:000402064400055
keywords	Virtual Reality; Oculus Rift; GearVR; Exhibition display
series	eCAADe
email
last changed	2022/06/07 07:51

_id	b796
authors	Krishnamurthy, B.K., Tserng, H.-P., Schmitt, R.L., Russell, J.S., Bahia, H.U. and Hanna, A.S.
year	1998
title	AutoPave: towards an automated paving system for asphalt pavement compaction operations
source	Automation in Construction 8 (2) (1998) pp. 165-180
summary	Asphalt pavement density from roller compaction is a crucial factor in ensuring satisfactory pavement performance. Proper and uniform compaction of the pavement mat is essential in achieving the desired final compacted density. There is a necessity to investigate existing pavement construction practices, and provide more cost-effective modifications to the current scenario. Automation of the paving operation can increase the efficiency and quality of the operation, lead to reductions in overall project costs and time, and enhance pavement life. A system can be developed through algorithmic planning and real-time guidance strategies, and the development of a semi-automated path-planning and real-time guidance system that aims towards automating the paving operation. This system accepts relevant paving project inputs, generates appropriate path plans for the compactor, performs a graphical visualization of the generated path plan, and offers real-time guidance capabilities using Global Positioning Systems (GPS) technology. This system, named AUTOPAVE (v1.0), was developed in Microsoft Visual Basic™ programming language and offers a user-friendly and interactive graphical interface. The proposed new system will incorporate state-of-the-art GPS technology to standardize paving operations that are more amenable to rigorous quality control, and can result in considerable reductions in cost and time involved in asphalt pavement construction projects. This system was tested on several actual paving projects, and many operational issues related to the functioning of the system were successfully overcome.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

_id	ecaade2018_178
id	ecaade2018_178
authors	Kroc, Tomasz and Walczak, Bartosz M.
year	2018
title	GIS Technologies Implementation Based on The EU Directive Inspire - A case study of the Pabianice city
doi	https://doi.org/10.52842/conf.ecaade.2018.1.489
source	Kepczynska-Walczak, A, Bialkowski, S (eds.), Computing for a better tomorrow - Proceedings of the 36th eCAADe Conference - Volume 1, Lodz University of Technology, Lodz, Poland, 19-21 September 2018, pp. 489-496
summary	This paper presents the experience of implementating GIS technologies at a county town urban planning department. The necessity to implement GIS technology is partly dictated by the requirements of the INSPIRE Directive. The discussed case provides valuable information about the problems and challenges that cities have in Poland, while performing their obligations under the directive. The process of preparing the necessary geographical database corresponding to existing planning documents raises many legal and technical problems. The presented case illustrates the whole process associated with the preparation of digitization and publication of urban plans. At the same time, it is worth to see the numerous benefits that the city obtains after publishing GIS data. Attention should also be paid to the further development of GIS and the chances of their use, especially in urban centers.
keywords	INSPIRE; GIS technologies implementation; urban planning; sharing geographic dates
series	eCAADe
email
last changed	2022/06/07 07:52

_id	a87a
authors	Kroszynski, U.I., Palstorem, Bj. and Trostmann, E. (et al)
year	1989
title	Geometric Data Transfer Between CAD Systems : Solid Models
source	IEEE Computer Graphics and Applications September, 1989. vol. 9: pp. 57-71 : ill. includes bibliography.
summary	The CAD/CAM community is showing great interest in the development of data exchange standards. This article highlights some aspects of the work accomplished during the first phase of the ESPRIT project CAD1. Part of this work has resulted in a specification for the exchange of solid models, as well as in some pilot implementations of processors based on this specification. This work also contributes to the efforts of the International Standards Organization (ISO) in developing the Standard for the Exchange of Product Model Data (STEP). The authors present a summary of the CAD1 approach, addressing the structure of neutral files for solids, entities, and attributes supporting three kinds of representations; facilities for the transfer of parametric designs; referencing library components; and other general mechanisms. Also is described the current state of the specification and processor implementations. An example of a CAD1 neutral file is included. Results from cycle and intersystem solid model transfer tests are presented, showing the practicality of the CAD1 proposal. B-rep model transfer results are discussed in some detail. Finally, the authors outline the relationship of this work with standardization
keywords	communication, solid modeling, standards, STEP, B-rep
series	CADline
last changed	2003/06/02 14:42

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