id 
2004_248 
authors 
Chang, TengWen and Woodbury, Robert F. 
year 
2004 
title 
GEOMETRY IN HIGHLY STRUCTURED DESIGN SPACES 
source 
Architecture in the Network Society [22nd eCAADe Conference Proceedings / ISBN 0954118324] Copenhagen (Denmark) 1518 September 2004, pp. 248254 
summary 
The Australian branch of the SEED project created a new formalism for design spaces in which the fundamental structuring operator is information specificity, formally characterised as subsumption. Here design space navigation is composed as combinations of the primitive operators of resolution, unification, antiunification, search, query and hysterical undo. The structures needed to support such a view are highly constrained in a mathematical sense and it is in these constraints that the problems for representation of geometry arise. The research challenge is to add the formal design space exploration constraints into an existing geometric representation scheme or alternatively to discover a new scheme in which the constraints are realized. Based on Typed Feature Structures (TFS), Geometric Typed Feature Structures (GTFS) are a representation scheme and method for performing the basic design space exploration operations on geometric objects. The crucial insight behind extending TFS to geometry is to discover useful algebraic structures of geometric objects affording the mathematics required of TFS. In this paper we describe Geometric Typed Feature Structures through one example of form: IOPSet. Our method of exposition is both mathematical and graphical: for each structure we will demonstrate both how it meets the necessary formal conditions as well as the sorts of formsculpting operations it enables. An architectural example: insulated enclosure is used as a demonstration of subsumption operations over IOPSet. One alternative description of insulated enclosure using GTFS is also shown in the paper. 
keywords 
Geometric Typed Feature Structures, SEED, Design Space Explorer, Geometric Design Information 
series 
eCAADe 
type 
normal paper 
email 
tengwen@arch.nctu.edu.tw 
full text 
file.pdf (365,719 bytes) 
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Akin, O., Aygen, Z., Chang, T.W., Chien, S.F., Choi, B., Donia, M., Fenves, S. J., Flemming, U., Garrett, J. H., Gomez, N., Kiliccote, H., Rivard, H., Sen, R., Snyder, J., Tsai, W.J., Woodbury, R., and Zhang, Y. (1997)
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, The International Journal of Design Computing



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, New York, Van Nostrand Reinhold



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Geometric Typed Feature Structures: Carrying Geometric Information using Typed Feature Structures
, Gudni Gudnason editor, Construction Information Technology 2000: taking the construction industry into the 21st century. Volume 1, Pages 166177



Iceland. Icelandic Building Research Institute. Chang, T.W. and Woodbury, R. F. (1997)
Efficient design spaces of nonmanifold solids
, Liu, Y. T., editor, CAADRIA 97, volume 2, pages 335344, Hsinchu, Taiwan. Computer Aided Architectural Design Research in Asia, National Chia Tung University



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Introduction to shape and shape grammars
, Environment and Planning B: Planning and Design, 7(3): 343352



Woodbury, R.F., Burrow, A., Datta, S., and Chang, T.W. (1999)
Typed Feature Structures and Design Space Exploration. Artificial Intelligence for Engineering Design
, Analysis and Manufacturing. 13:287302



last changed 
2005/10/27 11:57 
