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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	2866
authors	Clark, James H.
year	1976
title	Hierarchical Geometric Model for Visible Surface Algorithms
source	communications of the ACM. October, 1976. vol. 19: pp. 547-554 : ill. includes bibliography
summary	The geometric structure inherent in the definition of the shapes of three-dimensional objects and environments is used not just to define their relative motion and placement, but also to assist in solving many other problems of systems for producing pictures by computers. By using an extension of traditional structure information, or a geometric hierarchy, five significant improvements to current techniques are possible. First, the range of complexity of an environment is greatly increased while the visible complexity of any given scene is kept within a fixed upper limit. Second, a meaningful way is provided to vary the amount of detail presented in a scene. Third, 'clipping' becomes a very fast logarithmic search for the resolvable parts of the environment within the field of view. Fourth, frame to frame coherence and clipping define a graphical 'working set,' or fraction of the total structure that should be present in primary store for immediate access by the visible surface algorithm. Finally, the geometric structure suggests a recursive descent, visible surface algorithm in which the computation time potentially grows linearly with the visible complexity of the scene
keywords	hidden lines, hidden surfaces, data structures, clipping, geometric modeling, algorithms, computer graphics
series	CADline
last changed	2003/06/02 13:58

_id	acadia03_046
id	acadia03_046
authors	Maze, J., McGlothlin, M. and Tanzer, K.
year	2003
title	Fluid (in)form:Influencing Design Through Dynamic Particle Simulation
source	Connecting >> Crossroads of Digital Discourse [Proceedings of the 2003 Annual Conference of the Association for Computer Aided Design In Architecture / ISBN 1-880250-12-8] Indianapolis (Indiana) 24-27 October 2003, pp. 357-363
doi	https://doi.org/10.52842/conf.acadia.2003.357
summary	“My earliest childhood memories are related to a ranch my family owned near the village of Mazamitla. It was a pueblo with hills, formed by houses with tile roofs and immense eaves to shield passersby from the heavy rains which fall in that area. Even the earth’s color was interesting because it was red earth. In this village, the water distribution system consisted of great gutted logs, in the form of troughs, which ran on a support structure of tree forks, five meters high, above the roofs. The aqueduct crossed over the town, reaching the patios, where there were great stone fountains to receive the water. The patios outside the stables, with cows and chickens, all together. Outside, in the street, there were iron rings to tie the horses. The channeled logs, covered with moss, dripped water all over town, of course. It gave this village the ambience of a fairy tale.”(Luis Barragan,qtd in Ambasz 1976)
series	ACADIA
email
last changed	2022/06/07 07:58

_id	caadria2009_026
id	caadria2009_026
authors	Ostwald, Michael J.; Josephine Vaughan
year	2009
title	Calculating Visual Complexity In Peter Eisenman’s Architecture
source	Proceedings of the 14th International Conference on Computer Aided Architectural Design Research in Asia / Yunlin (Taiwan) 22-25 April 2009, pp. 75-84
doi	https://doi.org/10.52842/conf.caadria.2009.075
summary	This paper describes the results of the first computational investigation of characteristic visual complexity in the architecture of Peter Eisenman. The research uses a variation of the “box-counting” approach to determining a quantitative value of the formal complexity present in five of Eisenman’s early domestic works (Houses I, II, III, IV and VI all of which were completed between 1968 and 1976). The boxcounting approach produces an approximate fractal dimension calculation for the visual complexity of an architectural elevation. This method has previously been used to analyse a range of historic and modern buildings including the works of Frank Lloyd Wright, Eileen Gray, Le Corbusier and Kazuyo Sejima. Peter Eisenman’s early house designs–important precursors to his later Deconstructivist works–are widely regarded as possessing a high degree of formal consistency and a reasonably high level of visual complexity. Through this analysis it is possible to quantify both the visual complexity and the degree of consistency present in this work for the first time.
keywords	Computational analysis; fractal dimension; box-counting; Peter Eisenman
series	CAADRIA
email
last changed	2022/06/07 08:00

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