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	c044
authors	Heisserman, J. and Woodbury, R.
year	1993
title	Generating languages of solid models
source	Proceedings of Second ACM/IEEE Symposium on Solid Modeling and Applications, pp. 103-112
summary	This paper explores the automatic generation of solid models based on a grammatical paradigm. It presents a formalism, boundary solid grammars, for this purpose. Boundary solid grammars allow complex geometric conditions and operations to be expressed using a logical reasoning mechanism, the construction of powerful rules, and the description of grammars for generation of solid models that is appropriate for a variety of design domains. The formalism is well suited to computer implementation, and we demonstrate a prototype interpreter.
series	other
last changed	2003/04/23 15:50

_id	ca14
authors	Gavin, Lesley
year	1993
title	Generative Modelling and Electronic Lego
doi	https://doi.org/10.52842/conf.ecaade.1993.x.q8a
source	[eCAADe Conference Proceedings] Eindhoven (The Netherlands) 11-13 November 1993
summary	This paper shows work exemplifying the further extent of computer capabilities in the field of design. The work stems from a belief that for computers to be used effectively within the architectural profession their utility must stretch far beyond the process of description of geometric data, but be incorporated in the fundamental roots of design: that of conceptual design. Computers can be used to access the knowledge we have and then formulate this knowledge into a working language of design. Computers can be used to generate space and form in accordance with any relationship the designer may choose to set. This allows them to be used from the very conception of design. It is only by working from the very beginning, the very basis of the design of a building that we can fully develop the integration of computers in the construction industry. The work undertaken sets out primarily to explore one of the ways computers could be used in the field of architectural design. In recognition that an important byproduct of any design search is the enhanced understanding of the problem itself, the work was directed towards a particular project. This allowed each stage of thought to be to be considered as it arose and subsequently incorporated into the design model. The work does not attempt to automise the design process but simply tries to explore some of the opportunities offered by computers and see if they can be easily incorporated into the design process offering design solutions that may not otherwise have been considered. The exploration resulted in a simple design process model that incorporates the more accessible and useful aspects of computer technology.
keywords	Generative Modelling, Rule Based Form, Random Factors, Shape Grammars
series	eCAADe
email
last changed	2022/06/07 07:50

_id	4203
authors	Fraser, Michael
year	1993
title	Boundary Representation in Practice
doi	https://doi.org/10.52842/conf.acadia.1993.173
source	Education and Practice: The Critical Interface [ACADIA Conference Proceedings / ISBN 1-880250-02-0] Texas (Texas / USA) 1993, pp. 173-185
summary	There is an essential contradiction between the making of buildings or built environments in a threedimensional modeler and the graphic control of this process. Three-dimensional modeling is a constructive activity, in which solids are assembled as they would be in an actual structure; it benefits the designer. Presentation and documentation, on the other hand, are prescriptive activities that direct some of the construction and all the visualization and criticism of the proposal; they benefit the user and builder. A building while being designed can be visualized and criticized from its solid model, and the model can take a variety of forms depending on its part): computer-based, drawn in orthographic or perspective projection, constructed of cardboard or wood, or described narratively by means of text, programmatic data, performance model or animation. However, practicing architecture is the process of recording and communicating the decision making process and the contractual obligations that result. In actual practice, in contrast to the designer directed ideal, more participants are brought in sooner at the beginning of a project and with more publicity, which in turn means keeping more, not fewer, records. As the profession evolves, records of the string of design decisions will become more automated, more carefully structured and more retrievable. More buildings will be "tracked" and exposed to review in this way because public environmental sensitivity will improve. The communication between a single designer and his own thoughts will become less and less important.
series	ACADIA
last changed	2022/06/07 07:50

_id	ddss9202
id	ddss9202
authors	Koutamanis, A. and Mitossi, V.
year	1993
title	Architectural computer vision: Automated recognition of architectural drawings
source	Timmermans, Harry (Ed.), Design and Decision Support Systems in Architecture (Proceedings of a conference held in Mierlo, the Netherlands in July 1992), ISBN 0-7923-2444-7
summary	Computer vision offers the ability to transform digitized drawings into documents that can be used with computer systems. Recognition of digitized drawings can occur at the levels of (a) geometric elements, (b) building elements, and (c) spatial articulation. The last two levels apply not only to digitized images but also to computer-produced ones. The enormous burden placed on the user for inputting and manipulating CAD drawings suggests that automated recognition can add to the capabilities of CAD by making the computer more flexible with respect to inputting design information and more responsive to the actual concerns of the designer.
series	DDSS
last changed	2003/08/07 16:36

_id	855a
authors	Liew, B.K., Mathur, K., Tan, C.L., Tham, H.C., Teh, H.C., Loe, K.F., Heah, K.L.
year	1993
title	PARADISE: An Intelligent CAD System architecture
source	The Int. Journal of Construction IT 1(3), pp.1-24
summary	This paper presents the architecture of an intelligent CAD system called PARADISE. The motivation is in addressing the lack in architectural computing that has to do with intelligent assistance of design at the early stages. A schema for representing and integrating design knowledge and graphical data called the Design Model (DM) is presented. Following which, work done in developing the CAD-based front end of PARADISE called the graphic subsystem (PGS) is described. The emphasis is at providing tools which facilitate the creation and manipulation of form and spaces at early design stages. We then describe the functionalities of our geometric reasoner (PGS) is described. The geometric reasoner is responsible for all reasoning between the syntax of design drawings and its related semantics. We highlight, in particular, the reasoning of implicit spaces.
series	journal paper
last changed	2003/05/15 21:45

_id	48ee
authors	Paoluzzi, A., Pascucci, V. and Vicentino, M.
year	1993
title	PLASM Functional Approach to Design: Representation of Geometry
source	CAAD Futures ‘93 [Conference Proceedings / ISBN 0-444-89922-7] (Pittsburgh / USA), 1993, pp. 127-141
summary	PLASM (the Programming Language for Solid Modeling) is a solid-modeling-oriented design language strongly inspired by the functional language FL. In a PLASM environment, every geometrical object is generated by evaluating a suitable language expression which produces a polyhedral solid model. The language adopts a dimension-independent approach to geometry representation and algorithms. The generated objects are always geometrically consistent since the validity of geometry is guaranteed at a syntactical level. In fact (a) each well-formed expression is obtained by proper composition of well-formed subexpressions; (b) the evaluation of a well-formed (and polyhedrally typed) expression produces a valid solid model. In this paper, the representation scheme used in the language is given and some language scripts are shown and discussed.
keywords	Computer-Aided Architectural Design, Variational Geometry, Design Language, Geometric Design, Geometric Modeling, Functional Programming, Complexes, Polyhedra, Convex Cells
series	CAAD Futures
last changed	1999/04/07 12:03

_id	cf2011_p170
id	cf2011_p170
authors	Barros, Mário; Duarte José, Chaparro Bruno
year	2011
title	Thonet Chairs Design Grammar: a Step Towards the Mass Customization of Furniture
source	Computer Aided Architectural Design Futures 2011 [Proceedings of the 14th International Conference on Computer Aided Architectural Design Futures / ISBN 9782874561429] Liege (Belgium) 4-8 July 2011, pp. 181-200.
summary	The paper presents the first phase of research currently under development that is focused on encoding Thonet design style into a generative design system using a shape grammar. The ultimate goal of the work is the design and production of customizable chairs using computer assisted tools, establishing a feasible practical model of the paradigm of mass customization (Davis, 1987). The current research step encompasses the following three steps: (1) codification of the rules describing Thonet design style into a shape grammar; (2) implementing the grammar into a computer tool as parametric design; and (3) rapid prototyping of customized chair designs within the style. Future phases will address the transformation of the Thonet’s grammar to create a new style and the production of real chair designs in this style using computer aided manufacturing. Beginning in the 1830’s, Austrian furniture designer Michael Thonet began experimenting with forming steam beech, in order to produce lighter furniture using fewer components, when compared with the standards of the time. Using the same construction principles and standardized elements, Thonet produced different chairs designs with a strong formal resemblance, creating his own design language. The kit assembly principle, the reduced number of elements, industrial efficiency, and the modular approach to furniture design as a system of interchangeable elements that may be used to assemble different objects enable him to become a pioneer of mass production (Noblet, 1993). The most paradigmatic example of the described vision of furniture design is the chair No. 14 produced in 1858, composed of six structural elements. Due to its simplicity, lightness, ability to be stored in flat and cubic packaging for individual of collective transportation, respectively, No. 14 became one of the most sold chairs worldwide, and it is still in production nowadays. Iconic examples of mass production are formally studied to provide insights to mass customization studies. The study of the shape grammar for the generation of Thonet chairs aimed to ensure rules that would make possible the reproduction of the selected corpus, as well as allow for the generation of new chairs within the developed grammar. Due to the wide variety of Thonet chairs, six chairs were randomly chosen to infer the grammar and then this was fine tuned by checking whether it could account for the generation of other designs not in the original corpus. Shape grammars (Stiny and Gips, 1972) have been used with sucesss both in the analysis as in the synthesis of designs at different scales, from product design to building and urban design. In particular, the use of shape grammars has been efficient in the characterization of objects’ styles and in the generation of new designs within the analyzed style, and it makes design rules amenable to computers implementation (Duarte, 2005). The literature includes one other example of a grammar for chair design by Knight (1980). In the second step of the current research phase, the outlined shape grammar was implemented into a computer program, to assist the designer in conceiving and producing customized chairs using a digital design process. This implementation was developed in Catia by converting the grammar into an equivalent parametric design model. In the third phase, physical models of existing and new chair designs were produced using rapid prototyping. The paper describes the grammar, its computer implementation as a parametric model, and the rapid prototyping of physical models. The generative potential of the proposed digital process is discussed in the context of enabling the mass customization of furniture. The role of the furniture designer in the new paradigm and ideas for further work also are discussed.
keywords	Thonet; furniture design; chair; digital design process; parametric design; shape grammar
series	CAAD Futures
email
last changed	2012/02/11 19:21

_id	4abb
authors	Carlson, Christopher
year	1993
title	Describing Spaces of Rectangular Dissections via Grammatical Programming
source	CAAD Futures ‘93 [Conference Proceedings / ISBN 0-444-89922-7] (Pittsburgh / USA), 1993, pp. 143-158
summary	For the description of design spaces, grammatical programs offer several advantages over conventional grammars: (1) they integrate rewrite rules with more general non-deterministic functions, (2) they permit a range of programming styles from purely declarative to purely procedural, (3) they can describe spaces Of constrained, parametric designs, and (4) they permit design space descriptions to be developed modularly. We demonstrate these features of grammatical programming by way of a simple example that generates spaces of rectangular dissections.
keywords	Generative Systems, Grammars, Design Spaces, Functional Logic Programming
series	CAAD Futures
last changed	1999/04/07 12:03

_id	53da
authors	Carlson, Christopher
year	1993
title	Grammatical programming : an algebraic approach to the description of design spaces
source	Carnegie Mellon University
summary	The intuitiveness of spatial grammars makes them an attractive method of describing spaces of design. But grammars suffer from several inadequacies that limit their usefulness in design practice: (1) they cannot describe spaces of parametric, constrained designs, (2) they provide no control mechanisms for sequencing sets of rules, (3) they provide no 'subroutines' for dealing with complexity, and (4) they do not accommodate transformation mechanisms other than the rewrite rule. All of these inadequacies my [sic] be remedied by embedding grammars in a larger framework of nondeterministic functional programming, a paradigm we call 'grammatical programming.' In grammatical programs, rewrite rules are obtained from arbitrary nondeterministic functions by means of a 'rewrite closure' operator. Both rules and the designs they operate upon may be parametric and have attached constraints, permitting grammatical programs to describe spaces of parametric, constrained designs. Rewrite rules, and more generally, nondeterministic functions, are combined into compound functions by means of the operators of a control algebra, which provides functional composition, union, iteration, and a type of negation called 'failure.' The resulting modularity permits design space descriptions to be constructed, tested, and debugged piecewise, and to draw upon libraries of standard, debugged grammatical components. We begin this dissertation with an informal introduction to grammatical programming. We then give a formal, implementation-independent semantics of grammatical programs similar to the semantics of stratified logic programs. We discuss the implementation of a prototype compiler/interpreter and present case studies of the use of the prototype in describing spaces of rectangular dissections and a style of early Gothic traceries. We conclude with a discussion of lessons learned from the case studies and an agenda of further research necessary to make grammatical programming a useful tool in design practice.
series	thesis:PhD
last changed	2003/02/12 22:37

_id	63a9
authors	Hellgardt, Michael
year	1993
title	Architectural Theory and Design Grammars
doi	https://doi.org/10.52842/conf.ecaade.1993.x.i6u
source	[eCAADe Conference Proceedings] Eindhoven (The Netherlands) 11-13 November 1993
summary	The idea of artificial brains and artificial intelligence (AI) has been subject to criticism. The objection of J. Searle, for instance, which has been published in 1984 and which was partially directly addressed to one of the centres of AI, the Carnegie Mellon University in Pittsburgh, is mainly based on two points: (1) interactions between physiological and mental functions, and (2) the intentionality and context-relatedness of meaning. - With an emphasis on architectural design, this paper is about the second point, because the problem of meaning is a neuralgic point in the discussion of "artificial intelligence in design" (AID). Technical parameters are incompatible with mechanisms of meaning in any field of artistic, cultural or non-technical expression. This point, that is the relation between acts of meaning and acts of technical problem-solving and, connectedly, the relation between technological and architectural design, has been widely ignored in the discussion on AID. The development seems to be dominated by the tacit assumption that architecture can be articulated and generated purely in technical and formal terms of information processing beyond the field of architecture itself. Design and shape grammars have become a well established field in the discussion of AID, also with respect to architecture. But questions of architectural history and theory are touched on only incidentally and not sufficiently in this discussion. The problem is not, in other words, simply to include more or less unrelated cases of architecture, or architectural concepts -even if these are famous ones, such as Laugier's original hut for instance but to establish structural relations between arguments of architectural theory and arguments of AID.
series	eCAADe
email
last changed	2022/06/07 07:50

_id	4a5f
authors	Liu, Yu-Tung
year	1993
title	Recognizing Emergent Subshapes in Design Problem Solving: A Connectionist Investigation
doi	https://doi.org/10.52842/conf.acadia.1993.131
source	Education and Practice: The Critical Interface [ACADIA Conference Proceedings / ISBN 1-880250-02-0] Texas (Texas / USA) 1993, pp. 131-139
summary	Human problem-solving behavior has been modelled as a search through the space as defined as problem states, within which earlier states move to subsequent ones by applying rules in the human mind until the goal state is found. This cognitive model of problem-solving has been broadly accepted and has become dominant in both cognitive psychology and artificial intelligence (AI). In the field of computeraided architectural design (CAAD), search models are also widely used for solving design problems, although various foci of design knowledge are differently represented by shape grammars, graphs, and knowledge-based systems using predicate logic for different purports. In design search, design evolves from one state to another by exhaustively or heuristically applying proper rules. Each rule application involves, first, pattern-matching the antecedent of a rule to the current state and, second, transforming the matched portion of that state into the consequence of the rule. However pattern-matching techniques of current CAAD systems are still limited. In current CAAD systems, only those two squares can be dealt with by patternmatching for further development. However, a human designer can effortlessly recognize not only those two but other emergent subshapes, for example a smaller square in the middle where the two squares overlap and two L-shapes in the corners. Therefore a human designer can thoroughly deliberate all these alternatives before making a decision. In other words, human designer is capable of restructuring shapes in terms of emergent subshapes in any step of designing.
series	ACADIA
email
last changed	2022/06/07 07:59

_id	e4c3
authors	Saggio, Antonino
year	1993
title	Hypertext, Solid Modeling, and Hierarchical Structures in Formal Architectural Analysis
source	CAAD Futures ‘93 [Conference Proceedings / ISBN 0-444-89922-7] (Pittsburgh / USA), 1993, pp. 289-309
summary	The paper presents computer reconstructions of unbuilt projects relevant to the history of Italian rationalism together with the potential and limits of three CAAD environments. While an evaluation is provided for each one, a more detailed attention is devoted to hierarchical structures because of their capability to capture knowledge, to support further investigations, and to provide new insights into architecture. A model built in this environment allows simultaneously (1) the analysis and reconstruction even of a complex project at the size of a personal computer; (2) the simulation and test of different material, crucial in the case of restoration or in the case of incomplete and uncertain original project data; (3) the critical analysis (but also the co-presence of the different project alternatives of design phases) through the reading at the various level of the hierarchy; and (4) free investigation on the structure of data that can support new critical hypothesis and insights that were not anticipated at the moment of project creation.
keywords	Hypertext, Solid Modeling, Hierarchical Structures, Giuseppe Terragni, Italian Modern Architecture
series	CAAD Futures
last changed	1999/04/07 12:03

_id	87d2
authors	Serrano, J.G., Coll, J., Melero, J.C. and Burry, Mark
year	1993
title	The Need to Step Beyond Conventional Architectural Software
doi	https://doi.org/10.52842/conf.ecaade.1993.x.v0u
source	[eCAADe Conference Proceedings] Eindhoven (The Netherlands) 11-13 November 1993
summary	The Sagrada Familia Church has appointed two groups of consultants to assist the translation of Gaudi's 1:10 scaled models of the nave into coherent information from which to build. One team has been undertaking the static analysis of the nave roof vault structure and the other the study of the complexities of Gaudi's composition in order to provide full-scale production templates and models for the walls. Both teams had begun using the same basic CAD package and both have had to move onto high-end and very expensive solid-modelling software normally used by mechanical engineers and vehicle designers. Both groups are collaborating together with different accents despite an improbable geographical separation. The original problem, one of intersecting ruled-surfaces accurately to reflect the geometries of the surviving fragments of the original models, has led to surprising possibilities which were not anticipated at the outset. Currently the potential of parametric variation and associative geometries are being investigated as a mirror for some of the intuitive design process and finite element analysis is being considered as a means of interactively analysing the structural implications for each study. The software being used also has a powerful ray-tracing module; rather than being simply a tool to produce eye-catching 'realistic' renderings it has proved to be invaluable in allowing the computer user to understand the spatial complexities of the components being studied. This paper discusses the merits of an architecture so demanding (despite having been designed at the beginning of this century) that it requires the most costly equipment in today's market and it will consider the proposition that in ordinary circumstances, an architecture too complex to be described using basic CAD tools is an architecture beyond our reach. The interdisciplinary nature of the diverse and powerful modules within the software referred to will be used to contest this proposition using the presence of both teams in schools of architecture as evidence.
series	eCAADe
last changed	2022/06/07 07:50

_id	ddss9203
id	ddss9203
authors	Smeets, J.
year	1993
title	Housing tenancy, data management and quality control
source	Timmermans, Harry (Ed.), Design and Decision Support Systems in Architecture (Proceedings of a conference held in Mierlo, the Netherlands in July 1992), ISBN 0-7923-2444-7
summary	This paper deals with housing tenancy, data management and quality control. The proposed method is focused on quality characteristics of housing estates in view of rentability risks. It entails a cycle of registration, analysis and implementation of measures. The starting point is the behaviour of the housing consumer in a market-oriented context. The model is framed within theories of strategic management and marketing. Systematic registration and evaluation of consumer behaviour, by means of a set of relevant process and product indicators, can yield relevant information in the four phases of the rental process: orientation, intake, dwelling and exit. This information concerns the way in which the dwelling (characterized by product indicators) fits the needs of the consumer. The systematic analysis of the process and product indicators during the phases of the rental process makes a 'strength-weakness analysis' of housing estates possible. The indicators can be presented in aggregated form by way of a 'rentability index. The 'strength-weakness analysis' steers the intervention in the quality characteristics of housing estates. The possibilities for readjustment, however, are different. The quality control system is not only an early warning system, but also has several other functions: evaluation, planning and communication. The method described here lays a solid foundation for a decision-support system in the area of housing tenancy.
series	DDSS
last changed	2003/08/07 16:36

_id	7fe0
authors	Castleman, Kenneth R.
year	1993
title	Digital image processing
source	California Institute of Technologie
summary	Digital image processing has experienced explosive growth over the past two decades. Public awareness has increased by way of video games, digital video special effects used in the entertainement industry, as well as articles in the mainstream press. However, the most significant impact of digital image processing in the 90s will be in the area of applications of real world problems. To help readers keep pace, author Kenneth R. Castleman concentrates on those techniques that have proven most useful in practice. Part I presents several important concepts that can be developed without detailed mathematical analysis for a basic understanding. Part II addresses techniques that rely more on mathematics and eaborates analytically on certain concepts introduced in Part I. Part III covers specific application aread that are particularly in industry, science, and medicine. Contents: Preface; Images and Digital Processing; Digitizing Images; Digital Image Display; Image Processing Software; The Gray Level Histogram; Point Operations; Algebraic Operations; Geometric Operations; Filter Design; Wavelet Transformations; Image Restorations; Image Compression; Three Dimensional Image Processing; Appendices; Index.
series	other
last changed	2003/04/23 15:14

_id	db3b
authors	Faugeras, O.
year	1993
title	Three-dimensional computer vision, a geometric viewpoint
source	MIT press
summary	This monograph by one of the world's leading vision researchers provides a thorough, mathematically rigorous exposition of a broad and vital area in computer vision: the problems and techniques related to three-dimensional (stereo) vision and motion. The emphasis is on using geometry to solve problems in stereo and motion, with examples from navigation and object recognition.
series	other
last changed	2003/04/23 15:14

_id	5df5
authors	Fournier, A., Gunawan, A. and Romanzin, C.
year	1993
title	Common Illumination between Real and Computer Generated Scenes
source	Proceedings Graphics Interface '93, pp. 254-262, 1993
summary	The ability to merge a real video image (RVI) with a computer- generated image (CGI) enhances the usefulness of both. To go beyond "cut and paste" and chroma-keying, and merge the two images successfully, one must solve the problems of common viewing parameters, common visibility and common illumination. The result can be dubbed Computer Augmented Reality (CAR). We present in this paper techniques for approximating the common global illumination for RVIs and CGIs, assuming some elements of the scene geometry of the real world and common viewing parameters are known. Since the real image is a projection of the exact solution for the global illumination in the real world (done by nature), we approximate the global illumination of the merged image by making the RVI part of the solution to the common global illumination computation. The objects in the real scene are replaced by few boxes covering them; the image intensity of the RVI is used as the initial surface radiosity of the visible part of the boxes; the surface reflectance of the boxes is approximated by subtracting an estimate of the illuminant intensity based on the concept of ambient light; finally global illumination using a classic radiosity computation is used to render the surface of the CGIs with respect to their new environment and for calculating the amount of image intensity correction needed for surfaces of the real image. An example animation testing these techniques has been produced. Most of the geometric problems have been solved in a relatively ad hoc manner. The viewing parameters were extracted by interactive matching of the synthetic scene with the RVIs. The visibility is determined by the relative position of the "blocks" representing the real objects and the computer generated objects, and a moving computer generated light has been inserted. The results of the merging are encouraging, and would be effective for many applications.
series	other
last changed	2003/04/23 15:50

_id	5e6f
authors	Fudos, Ioannis
year	1993
title	Editable Representations for 2D Geometric Design
source	Purdue University
series	thesis:MSc
email
last changed	2003/02/12 22:37

_id	f485
authors	Kolarevic, Branko Radomir
year	1993
title	Geometric Relations as a Framework For Design Conceptualization
source	Harvard University, Graduate School of Design
summary	This study introduces geometric relations as a framework for design conceptualiza-tion-its key premise is that nothing is more fundamental in design than formation and discovery of relationships. The study attempts to establish a formal model for the development of a dynamic computer based graphic environment for design conceptualization that can recognize, record and maintain geometric design relations, merge "depictive" and "propositional", explicit and implicit in design, and provide a qualitatively different way to explore shape, dimension, and geometric organization. The study presents an approach to this task of formalization, and explores some of the fundamental issues pertinent to the subject, such as computability and applicability to the task of designing.Specifically, the study explores a relational description of shapes based on the concept of regulating or construction lines as an explicit formulation of a strategy to form generation and creative discovery, and proposes a lexicon of geometric relations to serve as a basis for composition. It hypothesizes that the construction lines can become much more useful and interesting when they are used not just as a rigid skeleton, but to regulate the behavior of a drawing and to maintain its essential structure as its parts are manipulated. As a consequence, designers could structure the behavior of the object being designed under future transformations; drawings could become seman-tically charged and could be manipulated in a semantically sophisticated fashion.The first chapter places the issue in the broader context by arguing that designers form implicit relational models of their designs. This contention is supported by introducing some of the relevant literature on mental imagery. Second chapter introduces design relations and in particular geometric relations, as a focal point of this study. A dynamic computer -based graphic context for design conceptualization is presented and evalu-ated in the next two chapters and conclusions are drawn. In the third chapter, the model's computability is demonstrated and evaluated through ReDRAW, a limited implementation of a relations based graphic system. In the fourth chapter, the model's applicability in design conceptualization is discussed and supported by examples.
series	thesis:PhD
email
more	http://www.gsd.harvard.edu/academic/asp/ddes/thesis_titles.html
last changed	2003/02/12 22:37

_id	af46
authors	Lue, Q.
year	1993
title	Computer aided descriptive geometry
source	Vienna University of Technology
summary	The main aim of this thesis is the creation of a software package for descriptive geometry. Why there is a need for such a descriptive geometry software? In descriptive geometry the ability of space perception is trained by solving spatial problems graphically with the use of a few constructions: Hence the solution of each problem consists of two parts: 1) 3D-part: After analyzing the spatial problem it is cleared how to proceed step by step in space. 2) 2D-part: Due to the basic rules of descriptive geometry for each step of the solving strategy the corresponding 2D-construction has to be carried out graphically. By use of CAD-DG the 2nd part can be replaced again by a 3D-part: Each step is solved using the basic routines offered in the menu. That means that each step is solved analytically but instead of any output of numbers the solution is immediately displayed in the main views on the screen. Therefore the user neither needs to apply formulas of analytic geometry nor has to take care of any coordinates. He still works directly with geometric objects in a graphic representation
keywords	Descriptive Geometry; Computer Graphics; Education; Interactive Graphic Software Package; Programming Technique; Educational Software
series	thesis:PhD
more	http://www.arcs.ac.at/dissdb/rn020701
last changed	2003/02/12 22:37

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