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id ddss9491
authors Szalapaj, Peter and Kane, Andy
year 1994
title Putting Cad in Perspective
source Second Design and Decision Support Systems in Architecture & Urban Planning (Vaals, the Netherlands), August 15-19, 1994
summary New developments in CAD software technology should allow users more freedom in the kinds of visual metaphors they choose to work with. CAD systems currently exploit only a small subset of both 2-D and 3-D graphical options. The options that are used are predominantly targeted at supporting the general trend towards a very narrow understanding of realism. Perceptual and artistic evidence points to a much wider range of possible images than that currently represented within CAD software. This extended range of graphical knowledge includes both perceptually "real" images, as well as constructed, "artificial" images. It is our contention that in order for CAD software to support analysis of design proposals, a much wider range of both 2-D and 3-D transformations should be supported, such as explosion, distortion, post-hoc decomposition, superimposition, etc. The consequences of such transformations frequently result in the formation of co-existing, multiple images, each of which may then be manipulated further in distinct ways. Support for user-interaction with such graphic objects, therefore, requires computational representations of multiple conceptual objects. Issues related to multiple representations and multiple viewpoints, therefore, are of paramount importance. Typically, designers use many representations and move rapidly between them. They tend to tolerate and even exploit inconsist-ency between different representations as they develop a design. Consistency is only relevant at certain stages and cannot therefore be enforced as a matter of course. The paper describes in detail each type of transformation that we consider to be of benefit for use in design analysis, together with a description of how each transformation can be integrated into a multiple viewpoint knowledge-based framework.
series DDSS
email p.szalapaj@sheffield.ac.uk
references Content-type: text/plain
last changed 2003/08/07 14:36
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