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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	caadria2020_304
id	caadria2020_304
authors	Fischer, Thomas and Wortmann, Thomas
year	2020
title	From Geometrically to Algebraically Described Hyperbolic Paraboloids - An optimisation-based analysis of the Philips Pavilion
source	D. Holzer, W. Nakapan, A. Globa, I. Koh (eds.), RE: Anthropocene, Design in the Age of Humans - Proceedings of the 25th CAADRIA Conference - Volume 1, Chulalongkorn University, Bangkok, Thailand, 5-6 August 2020, pp. 435-444
doi	https://doi.org/10.52842/conf.caadria.2020.1.435
summary	In this paper, we present a procedure to derive algebraic parameters from geometrically described truncated hyperbolic paraboloid surfaces. The procedure uses parametric modelling and optimisation to converge on close algebraic approximations of hyperbolic paraboloid geometry through a successive breakdown of vast search spaces. We illustrate this procedure with its application to the surfaces of the 1958 Philips Pavilion designed by Le Corbusier and Iannis Xenakis. This application yielded previously unavailable parametric data of this building in algebraic form. It highlights the power of the parametric design and optimisation toolkit, both in terms of automated search and epistemological enablement.
keywords	parametric analysis; optimisation; ruled surfaces; hyperbolic paraboloid; geometry reconstruction
series	CAADRIA
email
last changed	2022/06/07 07:51

_id	ijac202220105
id	ijac202220105
authors	Fischer, Thomas; Thomas Wortmann
year	2022
title	Algebraic analysis and reconstruction of the Philips Pavilion’s hyperbolic paraboloid surfaces
source	International Journal of Architectural Computing 2022, Vol. 20 - no. 1, pp. 61–75
summary	In this article, we present a procedure to derive algebraic descriptions from geometric descriptions of trimmed hyperbolic paraboloid (or ‘hypar’) surfaces. We contextualise this procedure historically, and we illustrate its application using the 1958 Philips Pavilion by Le Corbusier and Iannis Xenakis as a case study. The procedure uses parametric modelling and computational optimisation to converge on close algebraic ap- proximations of hyperbolic paraboloid geometry through a successive breakdown of vast search spaces. It departs from coordinate data of three or four vertices of a geometrically described hyperbolic paraboloid and yields the surface’s two quadratic coefficients, the coordinates of its centroid location and the rotation angles of its spatial orientation. The procedure exemplifies the under-explored analytical (as opposed to generative) use of computational optimisation and parametric modelling in the field of architectural computing.
keywords	Parametric analysis, optimisation, ruled surfaces, hyperbolic paraboloids, geometry reconstruction
series	journal
last changed	2024/04/17 14:29

_id	2004_630
id	2004_630
authors	Naai-Jung Shih, Chen-Yan Lin, and Chai-Yuan Liau
year	2004
title	A 3D Information System for the Digital Preservation of Historical Architecture
source	Architecture in the Network Society [22nd eCAADe Conference Proceedings / ISBN 0-9541183-2-4] Copenhagen (Denmark) 15-18 September 2004, pp. 630-637
doi	https://doi.org/10.52842/conf.ecaade.2004.630
summary	The purpose of this study is to build 3D models for the digital preservation of Chinese architecture. A historical architecture, the main hall of the Pao-An Temple, was scanned with a long-range 3D laser scanner. This temple is 19.68 meters wide, 18.2 meters wide, and 15.7 meters high. In total, the exterior and interior were registered into 1958 scans in order to cover the main hall. Scanned point clouds were converted into 3D computer models, sections, and boundary projections. Digital models were used as references for chronological records and comparison. Scanned components included the roof ridge, wood structure, dragon column, and a hanging flower. This research, which was sponsored by the National Science Council, created a two-way construction process, integrated geometric and image data, and established a digital reservation work process. Web pages were made to display 3D color components by using a plug-in to enable browsing of large files.
keywords	3D Laser Scanner; Historical Preservation
series	eCAADe
email
last changed	2022/06/07 07:59

_id	e1a1
authors	Rodriguez, G.
year	1996
title	REAL SCALE MODEL VS. COMPUTER GENERATED MODEL
source	Full-Scale Modeling in the Age of Virtual Reality [6th EFA-Conference Proceedings]
summary	Advances in electronic design and communication are already reshaping the way architecture is done. The development of more sophisticated and user-friendly Computer Aided Design (CAD) software and of cheaper and more powerful hardware is making computers more and more accessible to architects, planners and designers. These professionals are not only using them as a drafting tool but also as a instrument for visualization. Designers are "building" digital models of their designs and producing photo-like renderings of spaces that do not exist in the dimensional world. The problem resides in how realistic these Computer Generated Models (CGM) are. Moss & Banks (1958) considered realism “the capacity to reproduce as exactly as possible the object of study without actually using it”. He considers that realism depends on: 1)The number of elements that are reproduced; 2) The quality of those elements; 3) The similarity of replication and 4) Replication of the situation. CGM respond well to these considerations, they can be very realistic. But, are they capable of reproducing the same impressions on people as a real space? Research has debated about the problems of the mode of representation and its influence on the judgement which is made. Wools (1970), Lau (1970) and Canter, Benyon & West (1973) have demonstrated that the perception of a space is influenced by the mode of presentation. CGM are two-dimensional representations of three-dimensional space. Canter (1973) considers the three-dimensionality of the stimuli as crucial for its perception. So, can a CGM afford as much as a three-dimensional model? The “Laboratorio de Experimentacion Espacial” (LEE) has been concerned with the problem of reality of the models used by architects. We have studied the degree in which models can be used as reliable and representative of real situations analyzing the Ecological Validity of several of them, specially the Real-Scale Model (Abadi & Cavallin, 1994). This kind of model has been found to be ecologically valid to represent real space. This research has two objectives: 1) to study the Ecological Validity of a Computer Generated Model; and 2) compare it with the Ecological Validity of a Real Scale Model in representing a real space.
keywords	Model Simulation, Real Environments
series	other
type	normal paper
more	http://info.tuwien.ac.at/efa/
last changed	2004/05/04 14:42

_id	ecaade2012_174
id	ecaade2012_174
authors	Sdegno, Alberto
year	2012
title	Physical and Digital Models for Electronic Spaces: The 3D virtual re-building of the Philips Pavilion by Le Corbusier
source	Achten, Henri; Pavlicek, Jiri; Hulin, Jaroslav; Matejovska, Dana (eds.), Digital Physicality - Proceedings of the 30th eCAADe Conference - Volume 1 / ISBN 978-9-4912070-2-0, Czech Technical University in Prague, Faculty of Architecture (Czech Republic) 12-14 September 2012, pp. 747-754.
doi	https://doi.org/10.52842/conf.ecaade.2012.1.747
wos	WOS:000330322400079
summary	The aim of this academic research was to analyze one of the fi rst architectures designed and built with the fi nality to present electronic potentialities to people. The design was developed by Le Corbusier and his studio for the International Expo held in Brussels in 1958, for the Philips fi rm, and it was destroyed some months later, after the event. The research investigated the complex geometry of the structure in order to understand the strict relation between the physical perception of the space and the electronic aspects of them, using advanced technology, but, above all, if it is true that the best way to understand the physicality of a destroyed architecture could be a virtual visit using electronic devices and digital procedures.
keywords	Architecture; digital reconstruction; virtual space; geometry; representation
series	eCAADe
email
last changed	2022/06/07 07:59

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