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	41af
authors	Barnhill, Robert E.
year	1983
title	A Survey of the Representation and Design of Surfaces
source	IEEE Computer Graphics and Applications. October, 1983. vol. 3: pp. 9-16 : ill. includes bibliography
summary	The approach of devising robust surface methods applicable to arbitrarily located data was taken by the CAGD Group at the University of Utah. Adopting two broad classes of methods suitable for solving the problems (i.e., problems for which simplifying geometric assumptions cannot be made): (1) surface interpolants defined over triangles or tetrahedra and (2) distance-weighted interpolants. Interactive computer graphics was used to display surfaces for adequate visualization. Although some figures were given, it must be kept in mind that some 3-D medium, or at least motion, is necessary to understand surfaces
keywords	computational geometry, computer graphics, representation, curved surfaces, mathematics
series	CADline
last changed	2003/06/02 10:24

_id	6647
authors	Buxton, W., M.R. Lamb and Sherman, D. (et al)
year	1983
title	Towards a Comprehensive User Interface Management System
source	computer Graphics. July, 1983. vol. 17: pp. 35-42 : ill. includes bibliography
summary	A UIMS developed at the University of Toronto is presented. The system has two main components. The first is a set of tools to support the design and implementation of interactive graphics programs. The second is a run-time support package which handles interactions between the system and the user (things such as hit detection, event detection, screen updates, and procedure invocation), and provides facilities for logging user interactions for later protocol analysis. The design / implementation tool is a preprocessor, called MENULAY, which permits the applications programmer to use interactive graphics techniques to design graphics menus and their functionality. The output of this preprocessor is high- level code which can be compiled with application-specific routines. User interactions with the resulting executable module are then handled by the run-time support package. The presentation works through an example from design to execution in a step-by-step manner
keywords	software, user interface, management, computer graphics
series	CADline
last changed	2003/06/02 13:58

_id	sigradi2005_037
id	sigradi2005_037
authors	Maciel, Mario
year	2005
title	Interactive virtual art
source	SIGraDi 2005 - [Proceedings of the 9th Iberoamerican Congress of Digital Graphics] Lima - Peru 21-24 november 2005, vol. 1, pp. 37-41
summary	The interactivity presumes behavior action events exercised mutually between machines, between digital information and persons, between two or more persons, machines and digital information in real time. Nelson Max presented in Paris the first interactive landscape in 1983. The pioneer of scientific image was Ivan Sutherland, researcher of Massachusetts Institute of Technology (MIT). Another fundamental reference is Sonia Sheridan that invented a system where the user could modify the original image and visualize the result in real time. In Brazil, as well as in the outside, artists in assembly with scientists, see developing works computacionais with resorts of immersion and interatividade. Like this, in that search of new references, the text presents initially the main concepts about interactive virtual art and analyzes two important expositions: Emoção Art.Ficial 2.0 and Maior ou igual a 4D: computer art interactive. [Full paper in Portuguese]
series	SIGRADI
email
last changed	2016/03/10 09:55

_id	6015
authors	Sakurai, H. and Gossard, D.
year	1983
title	Solid Model Input Through Orthographic Views
source	Computer Graphics, Vol 17, No 3, July
summary	This paper describes the results of basic studies on procedures for creating solid models of component geometry from two-dimensional orthographic projections. An interactive graphic program was developed to allow the input of three orthographic views of a component geometry by digitizing from a drawing. The views may contain straight lines and circular arcs, solid or dashed. No restrictions are placed on the order or direction of lines and arcs in any view. Using an extension of the Wesley-Markowski procedure, the program constructs a three-dimensional solid model of the object. When the projections are ambiguous, multiple solid models are produced. The solid model may contain planar, cylindrical, conical, spherical and toroidal surfaces. Topological information of the solid model is sotred in a winged edge sturcture. Geometric information is stored as vertex coordinates and surface equations.
series	journal paper
last changed	2003/04/23 15:14

_id	8d59
authors	Andersen, J.M.
year	1983
title	CAD in Architectural Practice
source	Mechanical Engineering. July, 1983. pp. 48-54 : ill. includes a short bibliography
summary	A leading architecture/engineering firm has made use of in- house computer system since 1963. This paper discusses some special topics in using computers for the design of HVAC systems, and the process of implementing CAD in the HVAC engineering practice
keywords	computer graphics, HVAC, applications, practice, architecture
series	CADline
last changed	2003/06/02 13:58

_id	213d
authors	Bernard, Yves and Dupagne, Albert
year	1983
title	Volume: a computer Program for building Modelisation and Manipulation
source	Proceedings of the International Conference eCAADe [European Computer Aided Architectural Design Education] Brussels (Belgium) 1983, pp. III.70-III.79
doi	https://doi.org/10.52842/conf.ecaade.1983.x.n2m
summary	We describe a computer program VOLUME for interactive 3D modelling of building which can be used in many problems (heat losses calculations, architectural evaluation, ...) where a geometric representation is required. The program is more than a tool to input a geometry: it is also a tool for design; manipulations are very easy and many design solutions can be tried. We then discuss about developments for improving the quality of that tool in the design process.
keywords	Computer Aided Design, 3D Modelling, Computer-user Interface, Evaluations
series	eCAADe
email
more	http://www.ulg.ac.be/lema/
last changed	2022/06/07 07:50

_id	60c5
authors	Gordon, William J.
year	1983
title	An Operator Calculus for Surface and Volume Modeling
source	IEEE Computer Graphics and Applications October, 1983. vol. 3: pp. 18-22 : ill. includes bibliography.
summary	This article briefly describes the mathematical techniques underlying surface and volume modeling techniques in current practice. The first part outlines what might be termed an operator calculus for the approximation and interpolation of functions of more than one independent variable. This operator calculus uses operator multiplication and Boolean addition to compound the linear operators associated with simple bivariate and multivariate interpolation/approximation schemes. The result is a distributive lattice of approximation operators. The other two sections of the article contain specific examples of how this operator calculus leads to practical techniques for sculptured surface and volume modeling
keywords	curved surfaces, representation, solid modeling, boolean operations
series	CADline
last changed	2003/06/02 13:58

_id	e663
authors	Hanna, Samir L., Abel, John F. and Greenberg, Donald P.
year	1983
title	Intersection of Parametric Surfaces by Means of Look-Up Tables
source	IEEE Computer Graphics and Applications. October, 1983. vol. 3: pp. 39-48 : ill. (some col.). includes bibliography
summary	The intersection curve between parametric surfaces is important in such computer-aided design and manufacturing functions as shape design, analysis of drawing, design of fillets, and computation of numerically controlled tooling paths. The algorithm presented here provides an adequately accurate mathematical representation of the intersection curve. It also provides a database to simplify such operations as hidden-surface removal, surface rendering, profile identification, and interference or clearance computations. Further the algorithm facilitates creating and changing a finite element mesh in the intersection region
keywords	parametrization, curves, curved surfaces, algorithms, intersection
series	CADline
last changed	2003/06/02 13:58

_id	e21e
authors	Kajiya, J.T.
year	1983
title	New techniques for ray tracing procedurally defined objects
source	Computer Graphics, 17 3, 91-102
summary	We present new algorithms for efficient ray tracing of three procedurally defined objects: fractal surfaces, prisms, and surfaces of revolution. The fractal surface algorithm performs recursive subdi- vision adaptively. Subsurfaces which cannot intersect a given ray are culled from further consideration. The prism algorithm transforms the three-dimensional ray-surface intersection problem into a two-dimensional ray-curve intersection problem, which is solved by the method of strip trees. The surface- of-revolution algorithm transforms the three-dimensional ray-surface intersection problem into a two-dimensional curve-curve intersection problem, which again is solved by strip trees.
series	journal paper
last changed	2003/04/23 15:50

_id	0f6e
authors	Kalay, Yehuda E.
year	1983
title	Modular Menu Mapping and Hit-Testing
source	1983? 17 p. : ill. includes bibliography
summary	This paper introduces a method called MODULAR MENU MAPPING, which rationalizes menu layout and trades menu hit-test time with a look up table, thereby reducing the cost of determining the menu box inclusion of the cursor to a single unit of time. To overcome the problem of space required to store the look-up table, a hybrid method called RUN-LENGTH ENCODING is introduced. It reduces the storage space requirements by substituting the two-dimensional look-up table with a linear vector. It does however, require some search, which is nevertheless still much cheaper then the full search of a non-mapped menu
keywords	user interface, computer graphics
series	CADline
email
last changed	2003/06/02 13:58

_id	698a
authors	Liang, You-Dong and Barsky, Brian A.
year	1983
title	An Analysis and Algorithm for Polygon Clipping
source	Communications of the ACM November, 1983. vol. 26: pp. 868-877 : ill. includes bibliography.
summary	(This is one of the two standard algorithms for clipping. The other is the Sutherland-Hodgman reentrant algorithm). The process of polygon clipping is analyzed and the understanding gained thereby forms the foundation of a very direct algorithm. Each edge of the input polygon is considered to be a vector and is then extended to be a line of infinite extent. The boundary line segments of the clip window are extended in a similar fashion to become boundary lines. The intersection points of an extended edge with the boundary lines are identified as entry or exit points. It is observed that these entry and exit points can be used to characterize the visibility status of the edge. Not only might the edge have a visible segment, but it can also induce the inclusion in the output polygon of a vertex at a corner of the clip window called a turning vertex. To quantify the visibility conditions, the edge is written in parametric form. The possible contributions (including nil) that can be provided to the output polygon by a particular edge are established. This analysis is then embedded in an algorithm. An arbitrary example input polygon is given and the output of the algorithm is shown. The execution time for this example using this algorithm is measured to be half of what is required by the standard Sutherland-Hodgman reentrant polygon clipping algorithm
keywords	polygons, clipping, algorithms, computer graphics
series	CADline
last changed	2003/06/02 13:58

_id	e806
authors	Maver, T.W.
year	1987
title	The New Studio: CAD and the Workstation - State of the Art
source	Architectural Education and the Information Explosion [eCAADe Conference Proceedings] Zurich (Switzerland) 5-7 September 1987.
doi	https://doi.org/10.52842/conf.ecaade.1987.x.g1r
summary	This presentation draws on three main sources: (i) reportage of the ATHENA project at MIT, (ii) the experience of the author as a Professor of CAAD, (iii) the work of the eCAADe on the social impacts of CAAD. // Project ATHENA was introduced to MIT in May 1983 as an experiment in the potential uses of advanced computer technology throughout the University curriculum. By the end of the project a network of about 2000 high performance graphics workstations - supplied mainly by IBM and DEC - will have been installed; about half of MIT's $20 million investment is being devoted to the development of new applications software for teaching across almost all the academic Departments, including Architecture.
series	eCAADe
email
last changed	2022/06/07 07:50

_id	e0d1
authors	Mollaert Marijke
year	1983
title	Interactivity and Graphics as a Support for the Design of Cable Nets and Trusses
source	Proceedings of the International Conference eCAADe [European Computer Aided Architectural Design Education] Brussels (Belgium) 1983, pp. IV.26-IV.41
doi	https://doi.org/10.52842/conf.ecaade.1983.x.l4u
summary	This paper deals with an important aspect concerning the quality of a computer aided design (CAD) program, namely the human-computer interface. To fix the ideas,the user interface of FORCE, a program for the design and visualisation of cable nets and trusses, is considered The new design of this user interface was necessary to support an easy extension of the dialogue, both alpha-numerical and graphical. The new approach includes a separation of the interaction procedures and the application modules.
keywords	CAD, Human-computer Interface
series	eCAADe
email
more	http://wwwtw.vub.ac.be/ond/arch/pages/marijke
last changed	2022/06/07 07:50

_id	20d4
id	20d4
authors	Sequin, Carlo H. and P.S. Strauss
year	1983
title	UNIGRAFIX
source	ACM IEEE Design Automation Conference Proceedings (20th : 1983 : Miami Beach, Florida). pp. 374-381 : ill. includes bibliography.
summary	UNIGRAFIX is a three-dimensional graphics modeling environment that runs under the UNIX operating system. It comprises a terse, human-readable descriptive language that allows scene files of complex objects to be created with little overhead. These scenes can be used as input to a set of UNIGRAFIX programs which can be run either as separate functional units, or from within the interactive UNIGRAFIX environment. Programs are available to transform and illuminate the scene descriptions and to display them in a variety of styles on various output devices. The built-in hidden-face and hidden-line elimination routines use a scan- line algorithm which makes strong use of scan-line coherence as well as object coherence.
series	CADline
type	normal paper
last changed	2005/10/05 07:42

_id	abb6
authors	Woodbury, Robert F. and Glass, Gregory John
year	1983
title	VEGA : A Geometric Modelling System
source	11 p. : ill. December, 1983. DRC- 48-04-83. includes bibliography
summary	VEGA is an interactive geometric modelling system which has been developed at Carnegie-mellon University primarily for education in architecture and the arts. Its educational use is twofold: first as a medium for description and manipulation of form to aid in creative work and second as a base package of procedures that may be used by advanced architecture students in the creation of specialized modelling packages. VEGA is written in PASCAL. There are versions of VEGA currently running on VAX 11/780 computer under the UNIX and VMS operating systems. VEGA has been designed to run on a stand-alone personal computer. Currently VEGA is being converted to run on Sun Microsystems and PERQ machines. VEGA is used in the undergraduate curriculum of the School of Architecture at Carnegie-Mellon University. Its primary use to date has been as a means to introduce geometric modelling to architecture students who have minimal computer experience. VEGA may be viewed as a complete geometric modelling package or as a programming aid for development of special purpose geometric modelling programs. To date, one such specialized system, a robot arm design package, has been created as a student project. The development of the VEGA system is continuing. Current areas of interest include the development of more powerful geometric operations on polyhedra, parametric shapes and assemblies, instancing of sub- assemblies, user definition of primitive shapes and an interactive macro language for the manipulation of form
keywords	assemblies, user interface, modeling, polyhedra, CAD, education, architecture, geometric modeling, solid modeling
series	CADline
email
last changed	2003/06/02 13:58

_id	808b
authors	Wyleczuk, Rosanne, Meyer, Lynn and Babcock, Gigi
year	1983
title	The Transfer of University Software for Industry Use
source	ACM IEEE Design Automation Conference Proceedings (20th : 1983 : Miami Beach, Florida). pp. 756-760. includes bibliography
summary	Computer-aided engineering software is generated in abundance in educational institutions. As a major source of design automation software, universities have a lot to offer: a progressive research environment; a seemingly inexhaustible supply of software engineers in the form of undergraduates, graduate engineers, and professors; and a no-risk, multi- disciplinary design lab for experimentation. For these reasons, university software is being widely sought for use in production/commercial environments. This paper examines the interface between industry and the universities during the transfer of design automation software. A printed circuit board router, a graphics subroutine library, and a circuit simulation program are used to illustrate issues arising from the technology transfer. Guidelines to increase the likelihood of success in such transfers of software are provided
keywords	industry, engineering, software, CAE, education, technology, communication
series	CADline
last changed	2003/06/02 13:58

_id	2387
authors	Akin, Omer, Baykan, Can D. and Rao, Radha D.
year	1983
title	Searching in the UNIX Directory
source	December, 1983. 19 p. : ill., tables. includes bibliography
summary	The structure of the directory space and subjects search behaviors in the UNIX operating system environment are examined. Protocol analysis with two subjects and survey of the contents of the directory space of all users of E-VAX and X-VAX systems in the Architecture and Computer Science Systems at Carnegie Mellon University were conducted. Depth first search characterized both the organization of the directories and the behavior of the subjects. Single step as opposed to multiple step traversal of the directory tree was also prevalent in the subject`s behaviors. Recommendations for system friendliness, in term of reusability, orientation, robustness, and consistency are developed
keywords	UNIX, user interface, protocol analysis
series	CADline
email
last changed	2003/06/02 13:58

_id	21d8
authors	Balas, Egon and Toth, Paolo
year	1983
title	Branch and Bound Methods for the Traveling Salesman Problem
source	December, 1983, 65 p. : ill., tables. Includes bibliography
summary	This paper reviews the state of the art in enumerative solution methods for the traveling salesman problem (TSP). The introduction (Section 1) discusses the main ingredients of branch and bound methods for the TSP. Sections 2,3 and 4 discuss classes of methods based on three different relaxation of the TSP: the assignment problem with the TSP cost function, the 1-tree problem with a Lagrangean objective function, and the assignment problem with a lagrangean objective function. Section 5 briefly reviews some other relaxations of the TSP, while section 6 discusses the performance of some state of the art computer codes. Besides material from the literature, the paper also includes the results and statistical analysis of some computational experiments designed for the purposes of this review
keywords	relaxation, branch-and-bound, algorithms, applications
series	CADline
last changed	2003/06/02 13:58

_id	2e0a
authors	Besant, C.B.
year	1983
title	Computer-Aided Design and Manufacture. -- 2nd. ed
source	232 p. : ill. Chicester [West Sussex], New York: Halsted Press, 1983. includes bibliography and index -- (Ellis Horwood Series in Engineering Science)
summary	An introduction to computing as an aid to design and manufacture. Provides description of hardware and software of CAD systems, discusses their use in engineering drafting
keywords	drafting, hardware, software, CAD, CAM, practice
series	CADline
last changed	2003/06/02 13:58

_id	0000
authors	Bijl, Aart
year	1983
title	Know Your Technology - Or: Can Computers Understand Designers?
source	Proceedings of the International Conference eCAADe [European Computer Aided Architectural Design Education] Brussels (Belgium) 1983, pp. V.1-V.11
doi	https://doi.org/10.52842/conf.ecaade.1983.x.t5s
summary	Any great expansion of the population of computer users, embracing architects and other ordinary people, will happen only if we change from current computing technology to radically new software technology. Criteria for new technology are discussed, with reference to inadequacies of current technology; we should strive for computers that can understand people. Logic programming is described as one development towards this goal, illustrated by the example of Prolog serving as interpreter of user demands and supporting partial and changing logical models of user activity. Architects can choose computing options now that will put them on a path leading to future new technology. Choice is explained, favouring a software environment that is used by researchers and also supports immediate and practical computer applications. Lessons are drawn for architectural education, to prepare for change that will take place during a student's 40-year working life.
keywords	Software Technology, Logic Programming
series	eCAADe
last changed	2022/06/07 07:50

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