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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Hits 1 to 20 of 521

_id ga9814
id ga9814
authors Gatarski, Richard
year 1998
title Evolutionary Banners, exploring a generative design approach
source International Conference on Generative Art
summary This working paper reports pre-mature findings from an ongoing research project that uses Genetic Algorithms (GAs) to automate the design of objects in the World Wide Web (WWW). Digital communications technology has on the business side been conceptualized as electronic commerce (E-commerce). Digitization implies a new cost structure for message design, test and implementation. One important problem regards the use and effectiveness of different means for E-commerce market communications. The purpose with the research presented here is to experiment with a particular use of GAs in E-commerce retailing. It is not to look for an optimal algorithm or fine-tune its parameters. This paper contributes with findings and a discussion of a new E-commerce possibility – evolutionary banner design The scientific aim is to explore the value of such an approach. As well as identify important issues. In a soon-to-be-realized implementation, the commercial aim will be to increase the sales volume for a specific product. In a sense the evolutionary banner works as an artificial art director. Still, a human director is needed to design the banner organism, its genetic code and related parameters. And of course to develop more creative uses of the approach presented below.
series other
email
more http://www.generativeart.com/
last changed 2003/08/07 17:25

_id 2a12
authors Burry, Mark and More, Gregory
year 1998
title Representation, Realism and Computer Generated Architectural Animation
source Cyber-Real Design [Conference Proceedings / ISBN 83-905377-2-9] Bialystock (Poland), 23-25 April 1998, pp. 241-249
summary This paper documents a simple architectural form which, but for computer generated animation, has no ready alternative explanatory process for its complex generation. The subject is a column in the nave of the Sagrada Familia Church in Barcelona conceived by Gaudí at the beginning of this century without the contemporary opportunities for animated design exploration. The column is based on a set of counter-rotating mutually interfering profiles. As the column gains height, the profiles increase in interference with each other resulting in an increasingly fluted cross section, a tendency towards the Doric Order. For most, however, there is no easy access to a plausible explanation of the inherent rationale for the column. Animating the generation of the column reveals a unique and concealed sublimation of natural patterns of growth. Animation aids an understanding of the effect of the fourth dimension on design itself by releasing a meaning of time from an otherwise inanimate object. Here animation is used to decipher one aspect of the mystery of Gaudí's design while strengthening another: the source and conceptual power of Gaudí to anticipate this phenomenon. Rather than trivialising this design mystery, the explanatory role of the animation enriches comprehension of the formal concept of mutation through displacement or an evolutionary design paradigm. The paper discuss the implications of this ability to show transition, translation and dislocation without delving too deeply into how the animation was made, nor indeed the subject which, after all, requires animation to fully represent its less tangible qualities.
series plCAD
email
last changed 2003/05/17 10:01

_id ga9802
id ga9802
authors Frazer, J.H.
year 1998
title MACROGENESIS: Generative Design at the Urban Scale
source International Conference on Generative Art
summary This is a reflective paper indicating key points in the author’s involvement in generative design. Selected work is summarised in a series of snapshots of key developments. More recent evolutionary work is explained more fully including the "Groningen Experiment" which applied generative ideas to an interactive city planning model for Groningen that enabled citizen interaction with a generative model. The project has now been relocated in the School of Design, the Hong Kong Polytechnic University where the work is being expanded into the realm of industrial design and graphics.
series other
email
more http://www.generativeart.com/
last changed 2003/08/07 17:25

_id abed
authors Frazer, John Hamilton and Tang, Ming Xi
year 1998
title Development of an Integrated Design System
doi https://doi.org/10.52842/conf.caadria.1998.473
source CAADRIA ‘98 [Proceedings of The Third Conference on Computer Aided Architectural Design Research in Asia / ISBN 4-907662-009] Osaka (Japan) 22-24 April 1998, pp. 473-482
summary The School of Design in the Hong Kong Polytechnic University is developing advanced computer-based design systems by integrating Artificial Intelligence and evolutionary computing techniques with CAD/CAAD systems. Applications embrace architectural and environmental design as well as interior, industrial, fashion, graphic, and photographic design. The integration of the design systems developed in these domains provides a good basis for building a virtual design studio in collaboration with leading design research centres and institutions around the world. This virtual design studio is intended as a powerful computational environment for the integration of Asian cultural values with modern interdisciplinary design technologies.
keywords AI, Generative Techniques, Evolutionary Techniques, Virtual Studio
series CAADRIA
email
more http://www.caadria.org
last changed 2022/06/07 07:50

_id 99f2
authors Gero, J.S.
year 1998
title Concept formation in design
source Knowledge-Based Systems 10(7-8): 429-435
summary This paper presents a computationally tractable view on where simple design concepts come from by proposing a paradigm for the formation of design concepts based on the emergence of patterns in the representation of designs. It is suggested that these design patterns form the basis of concepts. These design patterns once learned are then added to the repertoire of known patterns so that they do not need to be learned again. This approach uses the notion called the loosely-wired brain. The paper elaborates this idea primarily through implemented examples drawn from the genetic engineering of evolutionary systems and the qualitative representation of shapes and their multiple representations.
keywords Concept Formation, Pattern Emergence, Representation
series other
email
last changed 2003/04/06 09:00

_id ba1b
authors Schnier, T. and Gero, J.S.
year 1998
title From Frank Lloyd Wright to Mondrian: Transforming evolving representations
source I. Parmee (Ed.), Adaptive Computing in Design and Manufacture, Springer, London, pp. 207-219
summary If a computer is to create designs with the goal of following a certain style it has to have information about this style. Unfortunately, the most often used method of formal representations of style, shape grammars, does not lend itself to automated implementation. However, It has been shown how an evolutionary system with evolving representation can provide an alternative approach that allows a system to learn style knowledge automatically and without the need for an explicit representation. This paper shows how the applicability of evolved representation can be extended by the introduction of transformations of the representation. One such transformation allows mixing of style knowledge, similar to the cross-breeding of animals of different races, with the added possibility of controlling exactly what features are used from which source. This can be achieved through different ways of mixing representations learned from different examples and then using the new, combined representation to create new designs. In a similar manner, information learned in one application domain can be used in a different domain. To achieve this, either the representation or the genotype-phenotype transformation has to be adapted. The same operations also allow mixing of knowledge from different domains. As an example, we show how style information learned from a set of Mondrian paintings can be combined with style information from a Frank Lloyd Wright window design, to create new window designs. Also, we show how the combined style information can then be used to create three-dimensional objects, showing style features similar to the newly designed windows.
keywords Genetic Engineering, Learning
series other
email
last changed 2003/04/06 09:02

_id ga9805
id ga9805
authors Stebbing, Peter D.
year 1998
title There is a universal grammar for visual composition!
source International Conference on Generative Art
summary There appears to be little general concensus on what components should be taught on art and design courses in the university sector when introducing students to visual composition. The existing textbooks display a variety of approaches and material confirming this lack of consistency. This paper presents four closely related core components (contrast, rhythm, balance, and proportion) which the author proposes form a generative grammar for visual composition. These components appear not just to underlie art and design but also other areas of human expressive culture ranging across film, dance, sculpture and architecture etc. This visual grammar, or metagrammar, appears to have its biological origins before our evolutionary phase as a hunter/gatherer and appears to be universal.
keywords origins of order in the arts, organic form, visual grammar, epigenetic rules, core components: contrast, rhythm, balance and proportion, visual composition curriculum, art and design education.  
series other
email
more http://www.generativeart.com/
last changed 2003/08/07 17:25

_id ga9804
id ga9804
authors Tang, Ming Xi
year 1998
title An Artificial Intelligence Approach to Industrial Design Support
source International Conference on Generative Art
summary The process of Industrial Design extends from market analysis, conceptualization, form generation to performance prediction, engineering analysis and user analysis etc. This requires a wide range of design knowledge and techniques from different disciplines. Computer-based support to industrial design is limited because the majority of the CAD systems deal with only geometric models and representations. The recent advancement in generative techniques utilizing evolutionary computation methods provides an opportunity for the study of more creative and systematic ways of supporting the industrial design process. However, one of the problems associated with the existing generative techniques is the difficulty in evaluating a large number of solutions generated by a generative system. This paper addresses this problem by presenting a system framework for industrial design support through an integrated application of Artificial Intelligence techniques.
series other
email
more http://www.generativeart.com/
last changed 2003/08/07 17:25

_id 4942
authors Gardner, Brian M.
year 1998
title The Grid Sketcher: An AutoCAD Based Tool for Conceptual Design Processes
doi https://doi.org/10.52842/conf.acadia.1998.222
source Digital Design Studios: Do Computers Make a Difference? [ACADIA Conference Proceedings / ISBN 1-880250-07-1] Québec City (Canada) October 22-25, 1998, pp. 222-237
summary Sketching with pencil and paper is reminiscent of the varied, rich, and loosely defined formal processes associated with conceptual design. Architects actively engage such creative paradigms in their exploration and development of conceptual design solutions. The Grid Sketcher, as a conceptual sketching tool, presents one possible computer implementation for enhancing and supporting these processes. It effectively demonstrates the facility with which current technology and the computing environment can enhance and simulate sketching intents and expectations. One pervasive and troubling undercurrent, however, is the conceptual barrier between the variable processes of human thought and those indigenous to computing. Typically with respect to design, the position taken is that the two are virtually void of any fundamental commonality. A designer’s thoughts are intuitive, at times irrational, and rarely follow consistently identifiable patterns. Conversely, computing requires predictability in just these endeavors. Computing is strictly an algorithmic process while thought is not always so predictable. Given these dichotomous relationships, the computing environment, as commonly defined, cannot reasonably expect to mimic the typically human domain of creative design. In this context, this thesis accentuates the computer’s role as a form generator as opposed to a form evaluator. The computer, under the influence of certain contextual parameters can, however, provide the designer with a rich and elegant set of forms that respond through algorithmics to the designer’s creative intents. The software presented in this thesis is written in AutoLISP and exploits AutoCAD’s capacious 3D environment. Designs and productions respond to a bounded framework where user selected parametric variables of size, scale, proportion, and proximity, all which reflect contextual issues, determine the characteristics of a unit form. Designer selected growth algorithms then arbitrate the spatial relationships between the unit forms and their propagation through the developing design. While the Sketcher implements only the GRID as an organizational discipline, many other paradigms are possible. Within this grid structure a robust set of editing features, supported by the computer’s inherent speed, allows the designer to analyze successive productions while refining ever more complex solutions. Through creative manipulation of these algorithmic structures ideas eventually coalesce to formalize images that represent a given design problem’s solution set.

series ACADIA
email
last changed 2022/06/07 07:51

_id 0b03
authors Horváth, I., Vergeest, J.S.M., Broek, J.J., Rusák, Z. and De Smit, B.
year 1998
title Tool profile and tool path calculation for free-form thick-layered fabrication
source Computer-Aided Design, Vol. 30 (14) (1998) pp. 1097-1110
summary In several application fields, large sized, free-form objects of various soft materials are widely used. Available layered prototyping technologies cannot be applied forfabrication of these kinds of objects due to size limitations. The authors have developed a novel approach of layered manufacturing that is the most appropriate forphysical concept modeling. This paper presents the algorithms for geometrically-based modeling of the profile curve of the flexible blade tool. It also describes thealgorithm for direct slicing of the CAD model. The second part of the paper deals with the algorithms for slicing, tool positioning and tool path calculation. On thefront surfaces of the layers G2, quasi G1 continuity can be implemented at the transition from one layer to another. In the circumferential direction G0 continuityexists.
keywords Layered Manufacturing, Cutter Path Generation, Cutter Profiles, Hermite Interpolation
series journal paper
last changed 2003/05/15 21:33

_id 489a
authors Matthews, K., Duff, S. and Corner, D.
year 1998
title A Model for Integrated Spatial and Structural Design of Buildings
doi https://doi.org/10.52842/conf.caadria.1998.123
source CAADRIA ‘98 [Proceedings of The Third Conference on Computer Aided Architectural Design Research in Asia / ISBN 4-907662-009] Osaka (Japan) 22-24 April 1998, pp. 123-132
summary Recent advances in computer graphics and 3D user interfaces have enabled the emergence of 3D sketch modeling as a viable approach to architectural design, especially in the early schematic phase. This paper describes how a system can be built and used which integrates the capabilities of a good structural analysis system in the user-friendly working environment of a design-oriented modeling program. The structure of a building model as seen by finite element algorithms is a schematic idealization of the building's physical structure into nodes, elements, internal releases, boundary conditions, and loads. The more familiar architectural model used for design visualization represents spatial elements such as roofs, floors, walls, and windows. Rather than treat these models independently, the structural model can be defined in relation to the architectural as a virtual model with inherited common characteristics and additional relational and attribute information, using feature-based geometry data structures to organize topological intelligence in the spatial model. This provides the basis for synchronous modification of structural and architectural aspects of the design.
keywords Structural Design, Spatial Design, Design Integration, Human-Computer Interaction, Feature-Based Modeling, Finite Element Analysis, Geometric Inference
series CAADRIA
email
more http://www.caadria.org
last changed 2022/06/07 07:58

_id 2557
authors Reisig, W.
year 1998
title Elements of Distributed Algorithms: Modeling and Analysis with Petri Nets
source Springer Verlag, Berlin
summary A variety of distributed algorithms are presented and proven correct in this book. A (Petri net based) technique to model and to analyze distributed algorithms is coincidently presented. This technique focusses on local states, independent actions, and synchronization of distributed threads of control. This book's scope is modest, as it sticks to a choice of small and medium size distributed algorithms. Compositionality, stepwise refinement, interface specification, abstraction, etc., are not covered. Nevertheless, this book's claims are ambitious: Just as PASCAL-like programming structures and Hoare-style proof techniques appear optimal for a wide class of sequential algorithms, this book's formalism is suggested to be optimal for a wide class of distributed algorithms. Particular preliminary knowledge is not assumed in this text, besides basics in formal concepts and a general intuitive understanding of computer science. The text provides a basis for university courses and can help the practitioner to design distributed algorithms. The hurried reader may just study the pictures.
series other
last changed 2003/04/23 15:14

_id ddss9814
id ddss9814
authors Van Raes, N., Cornelis, B. and Donney, J.P.
year 1998
title Decision Support for Improving Public Transport Network
source Timmermans, Harry (Ed.), Fourth Design and Decision Support Systems in Architecture and Urban Planning Maastricht, the Netherlands), ISBN 90-6814-081-7, July 26-29, 1998
summary When dealing with accessibility in a public transport network, isochronous maps are the common rule. Those maps are based on shortest distance algorithms run over simple or simplified networks. This contribution aims at representing the actual spatial distribution of the public transport offer in order to improve the usefulness to the urban community and to predict the evolution of the network according to the expected development of the agglomeration. The study combines the street (walking distance)and public transportation (buses) networks. The analyses rely on timetables and road maps completed by the public transportation company (TEC). Moreover, it makes use of built-up areas derived from satellite imagery. The processing requires raster- as well as vector-based procedures which have been achieved notably with the IDRISI software. Nevertheless the implementation of the decision rule relies on an original routine written by the authors. The area of interest concerns a part of the agglomeration of Ličge (Belgium), including two secondary poles, highlighting their relation with the centre of the city and with each other. First the paper presents the typology of the public transport routes. Then the methodology elaborated for each transportation type is analysed; the shortestdistance routes and their alternatives are extracted and combined within a raster process. The obtained results and their operationality are finally presented and the paper concludes with possible improvements of the methodology.
series DDSS
last changed 2003/08/07 16:36

_id ad5b
authors Chu, K.
year 1998
title Genetic Space
source A.D.: Architects in Cyberspace II, vol.68, no.11-12, pp.68-73
summary The twentieth century is the century of convergence. No other century has witnessed the development and profusion of new ideas as the twentieth century, and no other century has experienced the range and scope of events that transpired globally to the extent as this century. Various historical formations and discoveries, unleashed by the Enlightenment, have profoundly changed and transformed the course of human civilization and lead to the maturation of the idea of modernity in this century. With two years left to the start of the next millennium, we are experiencing the effects of modernity that have channeled powerful innovations into the dawn of a new era that could lead, potentially, beyond modernity. More than anything, it signals one of the major premises of the enlightenment to radicalize the substance of nature through the substance of reason and, thereby, altering the modality of the cultural universe of humanity into a genuine cosmopolitical concept. The synthesis of energy, matter and information into a three-parameter system of explanation has created conditions that allow us to think the unthinkable and extend our imagination to the limits of the conceivable. Modernity, from a metaphysical standpoint, brings to light the concept of a transcendental reason that aims to clarify the conditions of possibility for reason as an apriori given. As a consequence, it paved the way for a systemic constitution of a cosmic concept of reason that partakes in the arrival of alien intelligence and one that seems destined to project itself into an ontological domain of its own making. If modernity is an unfinished project, as claimed by some, its program is, nonetheless, being transformed into a cosmogenetic principle where synthesis is the pre-eminent outcome of a return to a second nature, i.e., a transcendent concept of nature. Even though the transcendental dialectic of critical reason is directed towards the timeless unity of the unconditioned, the genitive logic implicit within cosmic reason, itself a form of recursive self-propelling intelligence, appears to be animated by a projective force capable of engendering and pro-creating in the evolutionary sense of the term.
series other
last changed 2003/04/23 15:50

_id ad62
authors Klaus, R. and Urbaniak, A.
year 1998
title Safety algorithms for excavator engine control
source Automation in Construction 7 (5) (1998) pp. 391-400
summary The diesel engine without load and speed controller is a nonlinear astatic object. The torque and moment of internal friction (the diesel engine without load and governor) cross in the field of the engine's destruction (the speed limit was exceeded). Hence, the diesel engine is equipped with a speed governor. The main task of the governor is to counteract exceeding of the speed limit. We did a research on the engine with an injection pump wherein the conventional centrifugal governor was replaced by the microprocessor controller. This is because using a large number of electronic elements microcontroller has smaller reliability in comparison with mechanical governors. In order to protect the engine from the results of the controller's defect, we invented a safety system. The system guarantees the controlled stoppage of the engine's work in dangerous states. Information in this article are presented concerning protection and self-diagnostics of SW 400 engine control system that makes use of DP535 controller with Siemens 80C535 microcontroller. The presented control system is successfully tested in an excavator.
series journal paper
more http://www.elsevier.com/locate/autcon
last changed 2003/05/15 21:22

_id 094b
authors O´Rourke, J.
year 1998
title Computational Geometry in C
source Cambridge: Cambridge University Press
summary The first edition of this book is recognised as one of the definitive sources on the subject of Computational Geometry. In fact, O'Rourke has a long history in the field, has published many papers on the subject and is responsible for the computer graphics algorithms newsgroup which is where all computer geometers meet to discuss their ideas and problems. Typical problems discussed include how a polygon can be represented, how to calculate its area, how to detect if two polygons intersect and how to calculate the convex hull of a polygon. This leads onto more complex issues such as motion planning and seeing if a robot is able navigate from point x to point y without bumping into objects. The algorithms for these (and other) problems are discussed and many are implemented. In addition, many of the ideas are also discussed from the point of view of three and more dimensions. The only disappointment is that many problems are posed as questions at the end of the chapters and, as far as I could see, you cannot get the answers in the forms of a lecturer's supplement. This is fine in academia but not a lot of use for the commercial world. Due to the range of problems that incorporate computational geometry this book cannot be expected to answer every problem you might have. You will undoubtedly need access to other textbooks but I have been using the first edition of this book for many years and the second edition is a welcome addition to my bookshelf. If I was only allowed one computational geometry book then it would undoubtedly be this one.
series other
last changed 2003/04/23 15:14

_id 66c1
authors Scott, Sam
year 1998
title Feature Engineering for a Symbolic Approach to Text Classification
source University of Ottawa Computer Science
summary Most text classification research to date has used the standard 'bag of words' model for text representation inherited from the word-based indexing techniques used in information retrieval research. There have been a number of past attempts to find better representations, but very few positive results have been found. Most of this previous work, however, has concentrated on retrieval rather than classification tasks, and none has involved symbolic learning algorithms. This thesis investigates a number of feature engineering methods for text classification in the context of a symbolic rule-based learning algorithm. The focus is on changing the standard 'bag of words' representation of text by incorporating some shallow linguistic processing techniques. Several new representations of text are explored in the hopes that they will allow the learner to find points of high information gain that were not present in the original set of words. Representations based on both semantic and syntactic linguistic knowledge are defined and evaluated using the RIPPER rule-learning system. Two major corpora are used for evaluation: a standard, widely-used corpus of news stories, and a new corpus of folk song lyrics. The results of the experiments are mostly negative. Although in some cases the new representations are at least as good as the bag of words, the improvements in quantitative performance that were hoped for do not materialize. However, the results are not entirely discouraging. The syntactically defined representations may enable the learner to produce simpler and more comprehensible hypotheses, and the semantically defined representations do produce some real performance gains on smaller classification tasks that for various reasons fail to scale up to larger tasks. Some ideas are offered as to why the new representations fail to produce better results, and some suggestions are made for continuing the research in future.
series thesis:MSc
last changed 2003/02/12 22:37

_id e336
authors Achten, H., Roelen, W., Boekholt, J.-Th., Turksma, A. and Jessurun, J.
year 1999
title Virtual Reality in the Design Studio: The Eindhoven Perspective
doi https://doi.org/10.52842/conf.ecaade.1999.169
source Architectural Computing from Turing to 2000 [eCAADe Conference Proceedings / ISBN 0-9523687-5-7] Liverpool (UK) 15-17 September 1999, pp. 169-177
summary Since 1991 Virtual Reality has been used in student projects in the Building Information Technology group. It started as an experimental tool to assess the impact of VR technology in design, using the environment of the associated Calibre Institute. The technology was further developed in Calibre to become an important presentation tool for assessing design variants and final design solutions. However, it was only sporadically used in student projects. A major shift occurred in 1997 with a number of student projects in which various computer technologies including VR were used in the whole of the design process. In 1998, the new Design Systems group started a design studio with the explicit aim to integrate VR in the whole design process. The teaching effort was combined with the research program that investigates VR as a design support environment. This has lead to increasing number of innovative student projects. The paper describes the context and history of VR in Eindhoven and presents the current set-UP of the studio. It discusses the impact of the technology on the design process and outlines pedagogical issues in the studio work.
keywords Virtual Reality, Design Studio, Student Projects
series eCAADe
email
last changed 2022/06/07 07:54

_id ddss9801
id ddss9801
authors Achten, Henri and Leeuwen, Jos van
year 1998
title A Feature-Based Description Technique for Design Processes: A Case Study
source Timmermans, Harry (Ed.), Fourth Design and Decision Support Systems in Architecture and Urban Planning Maastricht, the Netherlands), ISBN 90-6814-081-7, July 26-29, 1998
summary In order to develop appropriate tools for decision support in design processes, it is necessary to found them on an understanding of design. Analytical techniques of design processes that have a direct relationship with tool development can enhance design support systems development. The paper focuses on a design support system in the VR-DIS research program. The aim of this research program is to develop insight in the architectural design process and to establish design tools for architectsworking in Virtual Reality. The basic approach for data modelling in VR in this research is based on an extension of the Feature Based Modelling paradigm taken from design in mechanical engineering. The computer model of the design in the system is a Feature-based model. This paper describes design processes in terms of changes in the Feature-based model of the design. For this purpose, a case of a house design is used. Drawings in the conceptual design phase up to the preliminary design phase arestudied. Each state of the drawings is described in terms of a Feature-model. Particular design actions such as creation of spaces, definition of architectural elements, and changes during the design process can be expressed in terms of changes in the Feature-model. Because of the use of Features, the changes can be formalised in the VR-DIS system. The description in terms of Features offers an analytical toolthat leads to a functional brief for design support tools. The paper ends with a discussion of implications and future work.
series DDSS
last changed 2003/11/21 15:15

_id 6433
authors Agranovich-Ponomarieva, E. and Litvinova, A.
year 1998
title The "Real Space - Cyberspace" Paradigm
source Cyber-Real Design [Conference Proceedings / ISBN 83-905377-2-9] Bialystock (Poland), 23-25 April 1998, pp. 141-145
summary In a chain of "real - perceived - imagined space" the computer reduces to a uniform model of only real and imagined space. It cannot undertake man's function or it cannot build the perception model. However, perception assumes physiological perception, psychological estimation and understanding, and emotional ho-experience. For a person the seizing of space during perception is constructing temporary spatial images and their development. The communicative relations of the person with environment are established during revealing internal and external structural communications and the interior represents the message, unwrapped in space and perceived in time. The real space is formed under influence of the sum of conceptual restrictions. The character of these restrictions depends on a super idea, a type of an initial situation, character of installations and on social-cultural stereotypes of the author. Without this stage transition to real architectural object is impossible. Result of activity of an architect at this stage becomes creation hypothetical cyberspace, with its own peculiarities and laws.
series plCAD
last changed 1999/04/08 17:16

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