Advanced search Recent papers Author index Keyword index Browse by series Help Desk About

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
PDF papers
References

Hits 1 to 11 of 11

Reformat results as: short   short into frame   detailed   detailed into frame  

_id 5cf4
id 5cf4
authors Barrionuevo, Luis F.
year 2004
title LOS "SPIROSPACES"
source Proceedings of the Fourth International Conference of Mathematics & Design, Special Edition of the Journal of Mathematics & Design, Volume 4, No.1, pp. 179-187.
summary This paper deals with “Spirospaces”. These are a conversion to the third dimension of the two dimensional geometric entities called “Spirolaterals”.

Abelson, Harold, diSessa and Andera (1968) gave the first rules concerning Spirolaterals. To obtain a Spirolateral from a set of straight lines, the first of them must be one unit long and the following must be incremented one unit at each step, at the same time that they turn in a constant direction. Odds (1973) establish the variation of the rotation direction, either to the left or the right. However, he did not give a mathematical relation able to calculate open Spirolaterals. Krawczyk (2001) developed a computer program that generates Spirolaterals following the method suggested by Abelson. These are Spirolaterals obtained by enumeration without a predictive mathematical formula. Krawczyc went farther proposing Spirolaterals based in curved lines. He pointed out that there are a variety of spirolateral forms that have architectural potentiality. Following this, the architectural potentiality of Spirolaterals is the basis of this paper.

To take advantage of that potentiality a computer program was implemented to generate spatial configurations based in Spirolaterals. When a third dimension is given to the Spirolaterals they become Spirospaces. These new entities need spatial and design parameters to be useful for architectural purposes. Barrionuevo and Borsetti (2001) gave results about that work establishing the concept of Spirospaces.

The aim of this paper is to describe a work directed to improve rules and procedures concerning Spirospaces. It is expected that these procedures governed by the proposed rules can be employed as tools during the early steps in the architectural design process.

In this work some aspects concerning Spirospaces are considered. First, Spirolaterals are presented as the predecessors of Spirospaces. Second, Spirospaces are defined, together with their structural parameters. Architectural modeling is studied at the light of two special elements of the Spirospaces: Interstitial spaces and Object spaces. Next, a computer program is presented as the appropriate tool to model configurations having architectural potentiality. Finally, the results obtained running the computer program are analyzed to determine their possible use as architectural forms. Several graphic illustrations are presented showing steps going from the exploration of spatial alternatives to the selection of a specific configuration to be developed.

It is expected that the described computer program could be employed as a design aid tool. As the operation of the program generates a variety of spaces able to dwell architectural objects, it eases the search of configurations suitable to specific functions. The results obtained have the possibility of being exported to computer graphic applications able to add materials, lights and cameras.
keywords Spirolaterals, Spirospaces, architectural spaces, interstitial spaces, objectual spaces
series other
type normal paper
email
last changed 2005/04/07 15:34
_id 2005_723
id 2005_723
authors Norman, Richard
year 2005
title Digital Color as a Paradigm for 3D Modeling
doi https://doi.org/10.52842/conf.ecaade.2005.723
source Digital Design: The Quest for New Paradigms [23nd eCAADe Conference Proceedings / ISBN 0-9541183-3-2] Lisbon (Portugal) 21-24 September 2005, pp. 723-728
summary Johannes Itten wrote in the 1920’s that seven distinct possibilities exist for the contrast of color: “Each (is) unique in character and artistic value, in visual, expressive and symbolic effect...together these constitute the fundamental resource of color design” Itten (1973). In either the digital world or in the world of painting, there has never been a more profound statement about color arrangement. Of Itten’s seven contrasts, the contrast of hue, value, and saturation, taken together have become a standard description of digital color today. As most projects reach the final stage of presentation, color selection becomes a possible paradigm for their development. It is customary to leave the selection of color to the end of a project — if time permits, then the colors are changed to make the project “appear better”, otherwise the selection of color is put in a pile of “good intentions” — overlooked. Proposed here is an alternative, a method of selecting color “up front”. Student projects are used to illustrate just how a building, or even a group of buildings may be better illustrated if one bases a presentation on a successful and understood work of art. The use of a painting as a source of color is proposed as a specific way of working. Most libraries contain an abundance of examples. The web, too, has many paintings; painters generally have more experience at putting colors together than architects and usually do not mind if their color ideas are borrowed, Done right, the result can be a happy merger of idea, emotion, and color, providing another paradigm for studying digital modeling.
keywords Color ; Painting ; Itten ; Design
series eCAADe
email
last changed 2022/06/07 07:59
_id 6559
authors Barrionuevo, Luis F. and Borsetti, Ricardo
year 2001
title LA POTENCIALIDAD ESPACIAL DE LOS "SPIROLATERALS" EN LA ARQUITECTURA (The Spacial Potential of the "Spirolaterals" in Architecture)
source SIGraDi biobio2001 - [Proceedings of the 5th Iberoamerican Congress of Digital Graphics / ISBN 956-7813-12-4] Concepcion (Chile) 21-23 november 2001, pp. 74-76
summary “Spirolaterals” (Odds, 1973) are mathematical entities created by drawing a set of lines, the first at a unit length, then each additional line increasing by a value of certain longitude while turning a constant or variable direction. (Krawczyk, 2000) The objective of this work is to propose the use of spirolaterals as a geometric support to produce preliminary alternatives for architectural layouts. A computation program is implemented to demonstrate the automatic production of spatial spirolaterals: spirospace, and images of results are exposed.
series SIGRADI
email
last changed 2016/03/10 09:47
_id 4489
authors Blinn, J.F.
year 1977
title Models of light reflection for computer synthesised pictures
source Computer Graphics, 11 2, 192-198
summary Bui-Tuong Phong published his illumination model in 1973, in the paper titled "Illumination for Computer-Generated Images". Phong's model is a local illumination model, which means only direct reflections are taken into account. Light that bounces off more than one surface before reaching the eye is not accounted for. While this may not be very realistic, it allows the lighting to be computed efficiently. To properly handle indirect lighting, a global illumination method such as radiosity is required, which is much more expensive. In addition to Phong's basic lighting equation, we will look at a variation invented by Jim Blinn. Blinn changed the way specular is calculated, making the computations slightly cheaper. Blinn published his approach in his paper "Models of Light Reflection for Computer Synthesised Pictures" in 1977.
series journal paper
last changed 2003/04/23 15:14
_id 6509
authors Blinn, J.F.
year 1978
title Simulation of Wrinkled Surfaces
source Computer Graphics 12 3. 286-292
summary Computer generated shaded images have reached an impressive degree of realism with the current state of the art. They are not so realistic, however, that they would fool many people into believing they are real. One problem is that the surfaces tend to look artificial due to their extreme smoothness. What is needed is a means of simulating the surface irregularities that are on real surfaces. In 1973 Ed Catmull introduced the idea of using the parameter values of parametrically defined surfaces to index into a texture definition function which scales the intensity of the reflected light. By tying the texture pattern to the parameter values, the texture is guaranteed to rotate and move with the object. This is good for showing patterns painted on the surface, but attempts to simulate rough surfaces in this way are unconvincing. This paper presents a method of using a texturing function to perform a small perturbation on the direction of the surface normal before using it in the intensity calculations. This process yields images with realistic looking surface wrinkles without the need to model each wrinkle as a separate surface element. Several samples of images made with this technique are included.
series journal paper
last changed 2003/04/23 15:14
_id c7e9
authors Maver, T.W.
year 2002
title Predicting the Past, Remembering the Future
source SIGraDi 2002 - [Proceedings of the 6th Iberoamerican Congress of Digital Graphics] Caracas (Venezuela) 27-29 november 2002, pp. 2-3
summary Charlas Magistrales 2There never has been such an exciting moment in time in the extraordinary 30 year history of our subject area, as NOW,when the philosophical theoretical and practical issues of virtuality are taking centre stage.The PastThere have, of course, been other defining moments during these exciting 30 years:• the first algorithms for generating building layouts (circa 1965).• the first use of Computer graphics for building appraisal (circa 1966).• the first integrated package for building performance appraisal (circa 1972).• the first computer generated perspective drawings (circa 1973).• the first robust drafting systems (circa 1975).• the first dynamic energy models (circa 1982).• the first photorealistic colour imaging (circa 1986).• the first animations (circa 1988)• the first multimedia systems (circa 1995), and• the first convincing demonstrations of virtual reality (circa 1996).Whereas the CAAD community has been hugely inventive in the development of ICT applications to building design, it hasbeen woefully remiss in its attempts to evaluate the contribution of those developments to the quality of the built environmentor to the efficiency of the design process. In the absence of any real evidence, one can only conjecture regarding the realbenefits which fall, it is suggested, under the following headings:• Verisimilitude: The extraordinary quality of still and animated images of the formal qualities of the interiors and exteriorsof individual buildings and of whole neighborhoods must surely give great comfort to practitioners and their clients thatwhat is intended, formally, is what will be delivered, i.e. WYSIWYG - what you see is what you get.• Sustainability: The power of «first-principle» models of the dynamic energetic behaviour of buildings in response tochanging diurnal and seasonal conditions has the potential to save millions of dollars and dramatically to reduce thedamaging environmental pollution created by badly designed and managed buildings.• Productivity: CAD is now a multi-billion dollar business which offers design decision support systems which operate,effectively, across continents, time-zones, professions and companies.• Communication: Multi-media technology - cheap to deliver but high in value - is changing the way in which we canexplain and understand the past and, envisage and anticipate the future; virtual past and virtual future!MacromyopiaThe late John Lansdown offered the view, in his wonderfully prophetic way, that ...”the future will be just like the past, onlymore so...”So what can we expect the extraordinary trajectory of our subject area to be?To have any chance of being accurate we have to have an understanding of the phenomenon of macromyopia: thephenomenon exhibitted by society of greatly exaggerating the immediate short-term impact of new technologies (particularlythe information technologies) but, more importantly, seriously underestimating their sustained long-term impacts - socially,economically and intellectually . Examples of flawed predictions regarding the the future application of information technologiesinclude:• The British Government in 1880 declined to support the idea of a national telephonic system, backed by the argumentthat there were sufficient small boys in the countryside to run with messages.• Alexander Bell was modest enough to say that: «I am not boasting or exaggerating but I believe, one day, there will bea telephone in every American city».• Tom Watson, in 1943 said: «I think there is a world market for about 5 computers».• In 1977, Ken Olssop of Digital said: «There is no reason for any individuals to have a computer in their home».The FutureJust as the ascent of woman/man-kind can be attributed to her/his capacity to discover amplifiers of the modest humancapability, so we shall discover how best to exploit our most important amplifier - that of the intellect. The more we know themore we can figure; the more we can figure the more we understand; the more we understand the more we can appraise;the more we can appraise the more we can decide; the more we can decide the more we can act; the more we can act themore we can shape; and the more we can shape, the better the chance that we can leave for future generations a trulysustainable built environment which is fit-for-purpose, cost-beneficial, environmentally friendly and culturally significactCentral to this aspiration will be our understanding of the relationship between real and virtual worlds and how to moveeffortlessly between them. We need to be able to design, from within the virtual world, environments which may be real ormay remain virtual or, perhaps, be part real and part virtual.What is certain is that the next 30 years will be every bit as exciting and challenging as the first 30 years.
series SIGRADI
email
last changed 2016/03/10 09:55
_id ef80
authors Knuth, Donald E.
year 1973
title Fundamental Algorithms
source The Art of Computer Programming. 2nd. ed. 634 p. : some ill. Addison- Wesley Series in Computer Science and Information Processing Reading, Mass.: Addison Wesley Pub. Co., 1973. vol.1: includes index.
summary -- This vol. is part of 7 vol. set. CADLINE has vol.1 and 3. Introduces basic concept in algorithms and information structure with exercises. Requires some knowledge in programming, techniques and computer jargon
keywords algorithms, education, data structures
series CADline
last changed 2003/06/02 10:24
_id sigradi2009_748
id sigradi2009_748
authors Leite, Denivaldo Pereira; Rafael Cunha Perrone
year 2009
title Inventory of Modern Arquitecture Virtual Reconstruction of Public Buildings at Santo André, São Bernardo do Campo e São Caetano do Sul [Inventory of Modern Architecture: Virtual reconstruction of public buildings at Santo André, São Bernardo do Campo e São Caetano do Sul (1960 – 1973)]
source SIGraDi 2009 - Proceedings of the 13th Congress of the Iberoamerican Society of Digital Graphics, Sao Paulo, Brazil, November 16-18, 2009
summary The object of this research, is identify and quantify the Public Architecture of some cities near form the city of São Paulo (Santo André, São Bernardo do Campo e São Caetano do Sul), during the years of 1960 till 1973. This research looks to realize a documental reference for new researchs, and to help in process of preservation, and the most important, give a new value to the buildings studied in this work. In the case and period studied, the documentatin is very important, because shows, in general lines, a production that is part of what is called “Arquitetura Brutalista Paulista”.
keywords virtual reconstruction; Modern Arquitecture; ABC paulista region
series SIGRADI
email
last changed 2016/03/10 09:54
_id e206
authors Nicolo, V. and Piccini, M.
year 1973
title Interactive Curve Fitting
source Amsterdam, London: North-Holland Pub. Co., 1973? pp. 427-437 : ill. includes bibliography
summary Interactive curve fitting is one of the main problems met when trying to fulfill the task of converting the description of the shape of a car body model into a computer compatible form. The solution proposed by Bezier has gained wide attention and acceptance mainly because of the idea of relating the shape of the curve to a polygon that mimics the curve itself. It is noted that the degree to which the polygon mimics the associated curve decreases as the number of points of inflexion, sharp bends or other odd behaviors require higher order polygons. Some solutions proposed by other authors to overcome this problem are briefly discussed and a contribution to the problem is given
keywords curves, Bezier, algorithms
series CADline
last changed 2003/06/02 13:58
_id cf2011_p018
id cf2011_p018
authors Sokmenoglu, Ahu; Cagdas Gulen, Sariyildiz Sevil
year 2011
title A Multi-dimensional Exploration of Urban Attributes by Data Mining
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. 333-350.
summary The paper which is proposed here will introduce an ongoing research project aiming to research data mining as a methodology of knowledge discovery in urban feature analysis. To address the increasing multi-dimensional and relational complexity of urban environments requires a multidisciplinary approach to urban analysis. This research is an attempt to establish a link between knowledge discovery methodologies and automated urban feature analysis. Therefore, in the scope of this research we apply data mining methodologies for urban analysis. Data mining is defined as to extract important patterns and trends from raw data (Witten and Frank, 2005). When applied to discover relationships between urban attributes, data mining can constitute a methodology for the analysis of multi-dimensional relational complexity of urban environments (Gil, Montenegro, Beirao and Duarte, 2009) The theoretical motivation of the research is derived by the lack of explanatory urban knowledge which is an issue since 1970’s in the area of urban research. This situation is mostly associated with deductive methods of analysis. The analysis of urban system from the perspective of few interrelated factors, without considering the multi-dimensionality of the system in a deductive fashion was not been explanatory enough. (Jacobs, 1961, Lefebvre, 1970 Harvey, 1973) To address the multi-dimensional and relational complexity of urban environments requires the consideration of diverse spatial, social, economic, cultural, morphological, environmental, political etc. features of urban entities. The main claim is that, in urban analysis, there is a need to advance from traditional one dimensional (Marshall, 2004) description and classification of urban forms (e.g. Land-use maps, Density maps) to the consideration of the simultaneous multi-dimensionality of urban systems. For this purpose, this research proposes a methodology consisting of the application of data mining as a knowledge discovery method into a GIS based conceptual urban database built out of official real data of Beyoglu. Generally, the proposed methodology is a framework for representing and analyzing urban entities represented as objects with properties (attributes). It concerns the formulation of an urban entity’s database based on both available and non-available (constructed from available data) data, and then data mining of spatial and non-spatial attributes of the urban entities. Location or position is the primary reference basis for the data that is describing urban entities. Urban entities are; building floors, buildings, building blocks, streets, geographically defined districts and neighborhoods etc. Urban attributes are district properties of locations (such as land-use, land value, slope, view and so forth) that change from one location to another. Every basic urban entity is unique in terms of its attributes. All the available qualitative and quantitative attributes that is relavant (in the mind of the analyst) and appropriate for encoding, can be coded inside the computer representation of the basic urban entity. Our methodology is applied by using the real and official, the most complex, complete and up-to-dataset of Beyoglu (a historical neighborhood of Istanbul) that is provided by the Istanbul Metropolitan Municipality (IBB). Basically, in our research, data mining in the context of urban data is introduced as a computer based, data-driven, context-specific approach for supporting analysis of urban systems without relying on any existing theories. Data mining in the context of urban data; • Can help in the design process by providing site-specific insight through deeper understanding of urban data. • Can produce results that can assist architects and urban planners at design, policy and strategy levels. • Can constitute a robust scientific base for rule definition in urban simulation applications such as urban growth prediction systems, land-use simulation models etc. In the paper, firstly we will present the framework of our research with an emphasis on its theoretical background. Afterwards we will introduce our methodology in detail and finally we will present some of important results of data mining analysis processed in Rapid Miner open-source software. Specifically, our research define a general framework for knowledge discovery in urban feature analysis and enable the usage of GIS and data mining as complementary applications in urban feature analysis. Acknowledgments I would like to thank to Nuffic, the Netherlands Organization for International Cooperation in Higher Education, for funding of this research. I would like to thank Ceyhun Burak Akgul for his support in Data Mining and to H. Serdar Kaya for his support in GIS.
keywords urban feature analysis, data mining, urban database, urban complexity, GIS
series CAAD Futures
email
last changed 2012/02/11 19:21
_id 6b90
authors Elson, Mark
year 1973
title Concepts of Programming Languages
source xii, 333 p. : ill. Chicago: Science Research Associates, Inc., 1973
summary Includes bibliography: p. [317]-325 -- (The SRA Computer Science Series). The primary purpose is of this paper is to study the important structural characteristic of various prominent high-level languages. The first part provides a brief, informal introduction to a cross-section of prominent languages that are latter drawn upon for illustration. The second and third parts provide an analysis of language features. They differ from each other in the degree of generality of the concepts discussed. The appendices provide ancillary information ranging from elementary automata theory to language-syntax description to compilation techniques
keywords programming, languages, theory, practice
series CADline
last changed 1999/02/12 15:08

No more hits.

HOMELOGIN (you are user _anon_557560 from group guest) CUMINCAD Papers Powered by SciX Open Publishing Services 1.002