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) 
references 
Contenttype: text/plain

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, Analysis and Manufacturing. 13:287302




last changed 
2005/10/27 11:57 
