The architectural design process is almost always iterative. Designers create solutions that, in turn, pose new questions, which are then investigated to generate more refined or even entirely new solutions. Designers often use computer-aided tools to build models and help them visualize ideas. However, the vast majority of these models are still built in such a way that they are difficult to modify interactively. The problem becomes more severe when bespoke 3D models are geometrically complex. Changing one aspect of such a model usually requires extensive low-level modifications to many of its other parts. To address this problem, designers have begun using parametric design software, which allows them to specify relationships among ...

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