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	7135
authors	Arumi-Noe, F.
year	1996
title	Algorithm for the geometric construction of an optimum shading device
source	Automation in Construction 5 (3) (1996) pp. 211-217
summary	Given that there is a need to shade a window from the summer sun and also a need to expose it to the winter sun, this article describes an algorithm to design automatically a geometric construct that satisfies both requirements. The construct obtained represents the minimum solution to the simultaneous requirements. The window may be described by an arbitrary convex polygon and it may be oriented in any direction, and it may be placed at any chosen latitude. The algorithm consists of two sequential steps: first to find a winter solar funnel surface; and the second to clip the surface subject to the summer shading conditions. The article introduces the design problem, illustrates the results through two examples, outlines the logic of the algorithm and includes the derivation of the mathematical relations required to implement the algorithm. This work is part of the MUSES project, which is a long term research effort to integrate Energy Consciousness with Computer Graphics in Architectural Design.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

_id	78f0
authors	Cotton, J.F.
year	1996
title	Solid modeling as a tool for constructing solar envelopes
source	Automation in Construction 5 (3) (1996) pp. 185-192
summary	This paper presents a method for constructing solar envelopes in site planning using a 3D solid-modeling program. The solar envelope for a site is a mechanism for ensuring that planning regulations on the solar access rights of others are observed. In this application, solid modeling offers the advantage of being a general-purpose tool having the capability to handle sets of site conditions that are complex. The paper reviews the concept of solar envelopes and demonstrates the method of application of solar envelope construction to a site. Techniques for displaying the constraints on building sections imposed by a solar envelope are presented.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

_id	5a8d
authors	Kensek, K., Noble, D., Schiler, M. and Setiadarma, E.
year	1996
title	Shading Mask: a teaching tool for sun shading devices
source	Automation in Construction 5 (3) (1996) pp. 219-231
summary	Sun shading devices provide an opportunity for the designer to control natural lighting, ventilation, and solar gain, all of which provide a benefit to the overall building performance. Through sun path diagrams and shading masks, some of the effects of these solar controls can be demonstrated graphically. This paper describes , a computer program written to help designers understand the basic theory of solar control; generate sun path diagrams; design overhead, side, and eggcrate shading devices; calculate solar angles and shading masks; and provide case studies of actual buildings.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

_id	1162
authors	Malkawi, Ali and Jabi, Wassim
year	1996
title	Integrating Shadow Casting Methodology and Thermal Simulation
source	Proceedings of the Solar ‘96 Conference. Asheville, North Carolina: American Solar Energy Society, 1996, pp. 271-276
summary	This paper describes an experiment that integrates shadow casting methodology and thermal simulation algorithms developed by the authors. The 3D shadow procedures use a polyhedral representation of solids within a Cartesian space that allows for accurate casting of shadows. The algorithm is also capable of calculating surface areas of polygonal shadows of any arbitrary shape and size. The thermal simulation algorithms – using the Transfer Function Method (TFM) – incorporate the shaded area calculations to better predict solar heat gain from glazing based on transmitted, absorbed, and conducted cooling loads. The paper describes the use of a 3D computer model to illustrate the impact of the pattern and area of shading on the visual and thermal properties of building apertures. The paper discusses the objectives of this experiment, the algorithms used, and their integration. Conclusions and findings are drawn.
keywords	Shadow Casting Algorithms Energey Thermal Simulation
series	other
email
last changed	2002/03/05 19:51

_id	sigradi2023_108
id	sigradi2023_108
authors	Passos, Aderson, Jorge, Luna, Cavalcante, Ana, Sampaio, Hugo, Moreira, Eugenio and Cardoso, Daniel
year	2023
title	Urban Morphology and Solar Incidence in Public Spaces - an Exploratory Correlation Analysis Through a CIM System
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. 1655–1666
summary	The walkability of open spaces has been highlighted in current discussions about the production of designed environments in urban contexts (Matan, 2011). To contribute to this theme, this work selects the environmental comfort of open spaces as its element of study. The production of urban space was investigated, specifically in regard to urban morphology, understanding that city design directly influences environmental comfort (Jacobs, 1996). This work addresses the geographic context of low latitudes, specifically in hot and humid climate zones of Brazil, and, in this context, according to NBR 15220 (national performance standards), shading is one of the main comfort strategies, so solar incidence was the approached environmental phenomenon. Thus, this work presents a digital system that performs exploratory analysis on the correlations between urban form indicators and environmental performance indicators, specifically solar incidence. The method consists of three steps: urban form modeling (1), indicator measurement (2) and correlation analysis (3). In the first stage, different spatial sections of a city in Brazil were represented in the digital environment (1). This work’s implementation instrument is based on a City Information Modeling framework (Beirao et al., 2012). Visual Programming Interface (VPI) and Geographic Information Systems (GIS) tools were used, in addition to a Relational Database Management System (RDBMS). Then, for each urban clipping, the values of morphological indicators and the incidence of solar radiation were measured (2). Based on the values of the indicators, an exploration of their correlation was carried out by statistical methods (3). The results of the correlation analysis and their correspondent scatter plots are presented. Finally, possible applications of the results for the creation of prescriptive urban planning systems are discussed, seeking to promote a sustainable urban environment.
keywords	Urban planning, Environmental comfort, Walkability, Urban morphology, Statistical methods.
series	SIGraDi
email
last changed	2024/03/08 14:09

_id	af76
authors	Wong, Waycal C.H. and Will, Barry F.
year	1996
title	An Analysis of Using a Digital 3D Sundial as a Design and Decision Support Tool
doi	https://doi.org/10.52842/conf.caadria.1996.131
source	CAADRIA ‘96 [Proceedings of The First Conference on Computer Aided Architectural Design Research in Asia / ISBN 9627-75-703-9] Hong Kong (Hong Kong) 25-27 April 1996, pp. 131-141
summary	The rapid speed of computer development brings new technologies, and these advances require innovative investigations to apply them optimally in the field of architecture. Burkett (1984) demonstrated that computer graphics can ‘provide an excellent opportunity for exploring solar issues in building redesign’. With one of the latest computer technologies, the "hyper-model” environment, this research investigates how to environment can become an aid in the design and decision support area. The research first reviews the communication between the architect and the client as described by Salisbury (1990). The review indicates that an interactive 3D hypermedia paradigm, with quick response, fast data manipulation and 3D visualization, offers a better communication media between the architect and the client. This research applies the "hyper-model” environment to design and develop a new methodology in collecting, analyzing, and presenting solar data. It also endeavors to show the possibilities of using the environment in design process.
series	CAADRIA
last changed	2022/06/07 07:57

_id	62c0
authors	Barrallo, Javier and Iglesias, Alberto
year	1996
title	Cybersculpture
source	Approaches to Computer Aided Architectural Composition [ISBN 83-905377-1-0] 1996, pp. 35-43
summary	From the first artistic expressions of mankind, the Mathematics has influence the shapes and proportions presents in the different artistic disciplines. The coming of Abstract art and modern Mathematics at the beginning of the century supposed a complete renovation of the way of understand the relationship between Mathematics and Art, reinforced by the huge expansion of computers nowadays. Chaos Theory or Fractal Geometry constitute examples of this tendencies, that normally are expressed in the two dimensional plane. The idea of this work consists on the utilisation of a series of elements from the contemporaneous Mathematics to express them in an artistic way in the three dimensional space. The result is a family of objects that we have called CYBERSCULPTURES, due to their sculptural character and the fact that they have Internet as their virtual museum.
series	other
last changed	1999/04/08 17:16

_id	0dfb
authors	Bovill, C.
year	1996
title	Fractal Geometry in Architecture and Design
source	Design Science Collection, Harvard University, Boston
summary	My intention in this book was to explain the essence of fractal geometry to the design community. Many of the fractals can be drawn by hand and fractal rhythms for use in design can be derived from musical scores. This approach was taken to make the material more approachable. Much of the literature on fractal geometry is hidden behind computer programs or complex mathematical notation systems.
series	other
last changed	2003/04/23 15:14

_id	8e02
authors	Brown, A.G.P. and Coenen, F.P.
year	2000
title	Spatial reasoning: improving computational efficiency
source	Automation in Construction 9 (4) (2000) pp. 361-367
summary	When spatial data is analysed the result is often very computer intensive: even by the standards of contemporary technologies, the machine power needed is great and the processing times significant. This is particularly so in 3-D and 4-D scenarios. What we describe here is a technique, which tackles this and associated problems. The technique is founded in the idea of quad-tesseral addressing; a technique, which was originally applied to the analysis of atomic structures. It is based on ideas concerning Hierarchical clustering developed in the 1960s and 1970s to improve data access time [G.M. Morton, A computer oriented geodetic database and a new technique on file sequencing, IBM Canada, 1996.], and on atomic isohedral (same shape) tiling strategies developed in the 1970s and 1980s concerned with group theory [B. Grunbaum, G.C. Shephard, Tilings and Patterns, Freeman, New York, 1987.]. The technique was first suggested as a suitable representation for GIS in the early 1980s when the two strands were brought together and a tesseral arithmetic applied [F.C. Holdroyd, The Geometry of Tiling Hierarchies, Ars Combanitoria 16B (1983) 211–244.; S.B.M. Bell, B.M. Diaz, F.C. Holroyd, M.J.J. Jackson, Spatially referenced methods of processing raster and vector data, Image and Vision Computing 1 (4) (1983) 211–220.; Diaz, S.B.M. Bell, Spatial Data Processing Using Tesseral Methods, Natural Environment Research Council, Swindon, 1986.]. Here, we describe how that technique can equally be applied to the analysis of environmental interaction with built forms. The way in which the technique deals with the problems described is first to linearise the three-dimensional (3-D) space being investigated. Then, the reasoning applied to that space is applied within the same environment as the definition of the problem data. We show, with an illustrative example, how the technique can be applied. The problem then remains of how to visualise the results of the analysis so undertaken. We show how this has been accomplished so that the 3-D space and the results are represented in a way which facilitates rapid interpretation of the analysis, which has been carried out.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

_id	7b57
authors	Chase, Scott Curland
year	1996
title	Modeling Designs with Shape Algebras and Formal Logic
source	University of California
summary	A formal, hierarchical model of shape, spatial relations and non-spatial properties is presented, constructed from first principles of geometry, topology and logic. The combination of the two major paradigms used here, shape algebras and logic, is one which has been largely unexplored. The underlying interest is the development of generalized design modeling systems in which the components may be used for a variety of synthesis and recognition problems. The algebras of shape described by Stiny have been shown to be useful in the generation and analysis of designs. The generality of their representations, their non-reliance upon predetermined structure, and their use in combination provide a richness of expression lacking in more traditional representations. The use of formal logic as a specification tool for modeling spatial relations is investigated here. Logic has proven itself useful as a programming and specification tool, providing advantages over traditional procedural programming methods. Among those is the ability to specify the knowledge to be encapsulated in a model without the need to specify data manipulation procedures. It is argued that specification in logic provides a natural method of development. The model is developed by extending the formalisms of shape algebras with the use of logic to make more precise, generalized, parametric definitions of shape and spatial relations than has been previously possible. The value of such a model is demonstrated by the use of these generalized spatial relations for solving typical problems in the fields of geographic information systems and architecture. The advantages of the representations used over more traditional 'kit-of-parts' models is also illustrated.
series	thesis:PhD
email
last changed	2003/02/12 22:37

_id	9a0d
authors	Debevec, P.E., Taylor, C.J. and Malik, J.
year	1996
title	Modeling and rendering architecture from photographs: a hybrid geometry- and image-based approach
source	SIGGRAPH'96, New Orleans, Louisiana
summary	We present a new approach for modeling and rendering existing architectural scenes from a sparse set of still photographs. Our modeling approach, which combines both geometry-based and imagebased techniques, has two components. The first component is a photogrammetricmodelingmethodwhich facilitates the recovery of the basic geometry of the photographed scene. Our photogrammetric modeling approach is effective, convenient, and robust because it exploits the constraints that are characteristic of architectural scenes. The second component is a model-based stereo algorithm, which recovers how the real scene deviates from the basic model. By making use of the model, our stereo technique robustly recovers accurate depth from widely-spaced image pairs. Consequently, our approach canmodel large architectural environmentswith far fewer photographs than current image-based modeling approaches. For producing renderings, we present view-dependent texture mapping, a method of compositing multiple views of a scene that better simulates geometric detail on basic models. Our approach can be used to recover models for use in either geometry-based or image-based rendering systems. We present results that demonstrate our approach's ability to create realistic renderings of architectural scenes from viewpoints far from the original photographs.
series	other
last changed	2003/04/23 15:50

_id	5e49
authors	Deering, Michael F.
year	1996
title	HoloSketch: A Virtual Reality Sketching/Animation Tool Special Issue on Virtual Reality Software and Technology
source	Transactions on Computer-Human Interaction 1995 v.2 n.3 pp. 220-238
summary	This article describes HoloSketch, a virtual reality-based 3D geometry creation and manipulation tool. HoloSketch is aimed at providing nonprogrammers with an easy-to-use 3D "What-You-See-Is-What-You-Get" environment. Using head-tracked stereo shutter glasses and a desktop CRT display configuration, virtual objects can be created with a 3D wand manipulator directly in front of the user, at very high accuracy and much more rapidly than with traditional 3D drawing systems. HoloSketch also supports simple animation and audio control for virtual objects. This article describes the functions of the HoloSketch system, as well as our experience so far with more-general issues of head-tracked stereo 3D user interface design.
keywords	Computer Graphics; Picture/Image Generation; Display Algorithms; Computer Graphics; Three-Dimensional Graphics and Realism; Human Factors; 3D Animation; 3D Graphics; Graphics Drawing Systems; Graphics Painting Systems; Man-Machine Interface; Virtual Reality
series	other
last changed	2002/07/07 16:01

_id	ddssar9610
id	ddssar9610
authors	Fahmy, A.B. and Vakalo, E.-G.
year	1996
title	A conceptual framework for deriving and analyzing the geometric structures of orthogonal architectural compositions in plan
source	Timmermans, Harry (Ed.), Third Design and Decision Support Systems in Architecture and Urban Planning - Part one: Architecture Proceedings (Spa, Belgium), August 18-21, 1996
summary	This paper introduces a conceptual framework for the analysis and generation of the underlying geometry of orthogonal architectural compositions in plan. The proposed framework has three interrelated objectives: (1) to allow the systematic analysis and derivation of the geometric structures of orthogonal architectural compositions in plan, (2) to describe the spatial relations among their constituent elements, and (3) to enumerate the morphological operations involved creating these relations. It comprises of a grammatical formalism and two data structures. The grammatical formalism allows the systematic derivation and analysis of the geometric structures of architectural compositions in plan. The first data structure is a table that enumerates the rules used to derive and/or analyze geometric structures and the sequence of their application. The second data structure is a binary tree that represents the spatial relations between the shapes produced during these processes.
series	DDSS
last changed	2003/08/07 16:36

_id	e212
authors	Faltings, Boi and Sun, Kun
year	1996
title	FAMING: supporting innovative mechanism shape design
source	Computer-Aided Design, Vol. 28 (3) (1996) pp. 207-216
summary	A popular saying claims that `innovation is 1% inspiration and 99% perspiration'. In this paper, we present a method for automating most of the perspiration involved in innovative design. We restrict our attention toinnovative design processes which can be structured into three steps: discovery of a new technique, understanding it, and generalising it to fit the problem at hand. The method we developed automates theunderstanding and generalisation phases which involve most of the perspiration.We present the FAMING system which demonstrates the method for the design of part shapes in 2D elementary mechanisms, also called kinematic pairs. We believe that the results are generalisable to otherdomains with similar characteristics, in particular any problem where geometry plays an important role.
keywords	Intelligent CAD, Qualitative Reasoning, Case-Based Reasoning
series	journal paper
last changed	2003/05/15 21:33

_id	ecaade2024_230
id	ecaade2024_230
authors	Fekar, Hugo; Novák, Jan; Míèa, Jakub; Žigmundová, Viktória; Suleimanova, Diana; Tsikoliya, Shota; Vasko, Imrich
year	2024
title	Fabrication with Residual Wood through Scanning Optimization and Robotic Milling
doi	https://doi.org/10.52842/conf.ecaade.2024.1.025
source	Kontovourkis, O, Phocas, MC and Wurzer, G (eds.), Data-Driven Intelligence - Proceedings of the 42nd Conference on Education and Research in Computer Aided Architectural Design in Europe (eCAADe 2024), Nicosia, 11-13 September 2024, Volume 1, pp. 25–34
summary	The project deals with the use of residual wood of tree stumps and roots through scanning, optimization and robotic milling. Wood logging residue makes up to 50 percent of the trees harvested biomass. (Hakkila and Parikka 2002). Among prevailing strategies is leaving residue on site, and recovering residue for bioenergy. (Perlack and others 2005). The project explores the third strategy, using parts of the logging residue for fabrication, which may reduce the overall amount of wood logging volume. Furthermore approach aims for applying residue in its natural form and taking advantage of specific local characteristics of wood (Desch and Dinwoodie 1996). The project applies the strategy on working with stump and roots of an oak tree. Due to considerations of scale, available milling technics and available resources, chosen goal of the approach is to create a functioning chair prototype. Among the problems of the approach is the complex shape of the residue, uneven quality of wood, varying humidity and contamination with soil. After cleaning and drying, the stump is scanned and a 3D model is created. The 3D model od a stump is confronted with a 3D modelled limits of the goal typology (height, width, length, sitting surface area and overal volume of a chair) and topological optimization algorithm is used to iteratively reach the desired geometry. Unlike in established topological optimization proces, which aims for a minimal volume, the project attempts to achieve required qualities with removing minimal amount of wood. Due to geometric complexity of both stump and goal object, milling with an 6axis industrial robotic arm and a rotary table was chosen as a fabrication method. The object was clamped to the board (then connected to a rotary table) in order to provide precise location and orientation in 3D space. The milling of the object was divided in two parts, with the seating area milled in higher detail. Overall process of working with a residual wood that has potential to be both effective and present aesthetic quality based on individual characteristics of wood. Further development can integrate a generative tool which would streamline the design and fabrication proces further.
keywords	Robotic arm milling, Scanning, Residual wood
series	eCAADe
email
last changed	2024/11/17 22:05

_id	5273
authors	Gortib, Sreenivasa R. and Srirama, Ram D.
year	1996
title	From symbol to form: a framework for conceptual design
source	Computer-Aided Design, Vol. 28 (11) (1996) pp. 853-870
summary	This paper presents the design of a software framework for conceptual design. It develops an approach to mapping an evolving symbolic description of design into a geometric description. The distinct elements ofthe symbol-form mapping are: (a) deriving spatial relationships between objects as a consequence of the functional relationship; (b) instantiating alternative feasible solutions subject to these relationships; and (c)presenting the evolving descriptions of geometry. Computational support for each of these elements is provided within a conceptual design framework. The paper presents components of the framework, explicitlyidentifies interactions between these components, and explains how these interactions are developed into an integrated framework. It presents the rationale for the design decisions made in the framework. Anexample is presented to clarify the approach adopted. The applicability of the approach is then discussed.
keywords	Conceptual Design, Symbol-Form Mapping, Knowledge-Based Systems, Knowledge Representation, Constraint Satisfaction
series	journal paper
last changed	2003/05/15 21:33

_id	6237
authors	Kiechle, Horst
year	1996
title	CONSTRUCTING THE AMORPHOUS
source	Full-Scale Modeling in the Age of Virtual Reality [6th EFA-Conference Proceedings]
summary	Constructing the Amorphous entails the ongoing research into a concept which aims to develop a new understanding for Art, Design and Architecture within society. Rigid, reductivist and confrontational methods based on static geometry, prejudice and competition are to be replaced by dynamic, interdisciplinary and integrative models. In his current art practice the author simulates existing architectural spaces whose interior are re-designed into sculpted environments, based on creative irregularity rather than idealised geometry. All the computer simulated “soft” environments can be realised on an architectural scale as temporary installations with the curved surfaces approximated through planar polygons cut from sheet materials. Within this framework the Darren Knight Gallery Project represents the most recently example. The paper discusses furthermore various 3D modeling options, such as standard CAD representations, high quality rendered video walk-throughs, VRML models and physically produced, full-scale models, made of corrugated cardboard. The cost and equipment requirements necessary for full-scale modeling in cardboard are outlined.
keywords	VRML, CAD, 3D Modeling, Model Simulation, Real Environments
series	other
type	normal paper
email
more	http://info.tuwien.ac.at/efa/
last changed	2004/05/04 14:40

_id	acadia16_140
id	acadia16_140
authors	Nejur, Andrei; Steinfeld, Kyle
year	2016
title	Ivy: Bringing a Weighted-Mesh Representations to Bear on Generative Architectural Design Applications
doi	https://doi.org/10.52842/conf.acadia.2016.140
source	ACADIA // 2016: POSTHUMAN FRONTIERS: Data, Designers, and Cognitive Machines [Proceedings of the 36th Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA) ISBN 978-0-692-77095-5] Ann Arbor 27-29 October, 2016, pp. 140-151
summary	Mesh segmentation has become an important and well-researched topic in computational geometry in recent years (Agathos et al. 2008). As a result, a number of new approaches have been developed that have led to innovations in a diverse set of problems in computer graphics (CG) (Sharmir 2008). Specifically, a range of effective methods for the division of a mesh have recently been proposed, including by K-means (Shlafman et al. 2002), graph cuts (Golovinskiy and Funkhouser 2008; Katz and Tal 2003), hierarchical clustering (Garland et al. 2001; Gelfand and Guibas 2004; Golovinskiy and Funkhouser 2008), primitive fitting (Athene et al. 2004), random walks (Lai et al.), core extraction (Katz et al.) tubular multi-scale analysis (Mortara et al. 2004), spectral clustering (Liu and Zhang 2004), and critical point analysis (Lin et al. 20070, all of which depend upon a weighted graph representation, typically the dual of a given mesh (Sharmir 2008). While these approaches have been proven effective within the narrowly defined domains of application for which they have been developed (Chen 2009), they have not been brought to bear on wider classes of problems in fields outside of CG, specifically on problems relevant to generative architectural design. Given the widespread use of meshes and the utility of segmentation in GAD, by surveying the relevant and recently matured approaches to mesh segmentation in CG that share a common representation of the mesh dual, this paper identifies and takes steps to address a heretofore unrealized transfer of technology that would resolve a missed opportunity for both subject areas. Meshes are often employed by architectural designers for purposes that are distinct from and present a unique set of requirements in relation to similar applications that have enjoyed more focused study in computer science. This paper presents a survey of similar applications, including thin-sheet fabrication (Mitani and Suzuki 2004), rendering optimization (Garland et al. 2001), 3D mesh compression (Taubin et al. 1998), morphin (Shapira et al. 2008) and mesh simplification (Kalvin and Taylor 1996), and distinguish the requirements of these applications from those presented by GAD, including non-refinement in advance of the constraining of mesh geometry to planar-quad faces, and the ability to address a diversity of mesh features that may or may not be preserved. Following this survey of existing approaches and unmet needs, the authors assert that if a generalized framework for working with graph representations of meshes is developed, allowing for the interactive adjustment of edge weights, then the recent developments in mesh segmentation may be better brought to bear on GAD problems. This paper presents work toward the development of just such a framework, implemented as a plug-in for the visual programming environment Grasshopper.
keywords	tool-building, design simulation, fabrication, computation, megalith
series	ACADIA
type	paper
email
last changed	2022/06/07 07:58

_id	b42c
authors	Piccolotto, M. and Rio, O.
year	1996
title	A computer-based teaching tool for structural design
source	Automation in Construction 5 (3) (1996) pp. 233-242
summary	In this paper we will discuss the importance of computer-based simulation tools for the education of architects and civil engineers. We present our efforts to develop a program for the simulation of structures (CASDET). CASDET forms a microworld for planar structures. The program enables students to compose structures and to experiment interactively the effects of different geometry and load configurations. It tries to identify the proposed structure and controls its stability. Upon request of the student, it also processes displacements, internal forces (moments, shear forces, etc.) and reaction forces on supports. The students can then visualise the desired information by interacting directly with the structure or its members of interest. We present different methods with which students can visualise the results of their actions and discuss their implications in the educational context.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:23

_id	5764
authors	Stouffs, R. and Krishnamurti, R.
year	1996
title	On a query language for weighted geometries
source	O. Moselhi, C. Bedard and S. Alkass (eds.), Third Canadian Conference on Computing in Civil and Building Engineering, Canadian Society for Civil Engineering, Montreal, pp. 783–793
summary	Computational design relies on effective models of geometry, for the creation of (geometries of) design artifacts and the querying of the characteristics of these (geometries). In the search for appropriate solid models, there is a consensus - namely, a solid model has to be complete - that is, the corresponding representations are "adequate for answering arbitrary geometric questions algorithmically''. However, this statement becomes more difficult to qualify as users and, in particular, designers pose new questions that go beyond geometry and require other information to be included. Current CAD systems tend to focus on the representation of design artifacts, and on the tools and operations for the creation and manipulation of these representations. Techniques for querying are mostly added as afterthoughts, constrained by the data representation system and methods. Yet, querying a design is as much an intricate aspect of the design process as is the creation or manipulation thereof. In this paper, we explore the foundation of a query language that allows for a rich body of queries, using both geometric and non-geometric data, and incorporating spatial rules as a syntactical expression for pattern matching on geometries.
series	other
email
last changed	2003/04/23 15:50

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