enable the designer to quickly explore a great number of spatial solutions.
INTRODUCTIONSince the early 80's CAD tools have provided us with a new means of graphic representation in architecture. Contrary to the usual manner in which spatial forms are represented in a 2D "glance" [in sections, elevations and 3D model "constructed" by the computer. Admitting that graphic figuration plays a key role in architecture (Lebahar, 1983) (Boudon et al., 1994) these recent developments constitute an important milestone in the practice of conceptualisation. In fact today's computer techniques provide architecture with a unique opportunity for "retooling" and "re-thinking" its methodologies just as happened with the arrival of perspectives and stereometric projections. 3D model software [Catia, Maya, etc.] In this paper, we make the assumption that a shape modelling process can rely on the application of a set of morphological operators to initial shapes. We refer to several researches which have attempted to identify such operators. We also attempt to validate this design approach through the analysis of some buildings. A design system based on the combination of these operators could
During the creative phase, the architect introduces hypotheses and validates them by trying out various adjustments during the process of conception. The use of existing CAD tools during the conception phase is not compatible with the iterative aspect of this process. So the challenge is to define a model that takes into account the entire creative process in a trial and error framework during the conceptual phase. In this article we will define the "pleating" operator.
This paper presents a constraint-based modeling system, integrated into a widely used CAD modeler. Using a notification mechanism, the system records the precision functions called by the user in order to maintain geometric relations between points locations and source objects. These relations are stored in a directed graph which allows an automatic update of the model.
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