Interactive 3D rapid-prototyping models

Abstract

Today CAD programs are not just producing mind-blowing graphics pictures or convincing virtual models that can be interactively manipulated and changed. They also can yield tangible, physical artifacts, thanks to the development of many layered manufacturing techniques and the emergence of services such as Shapeways [2011] and Ponoko [2011],. Creating, manipulating, and studying such 3D artifacts adds a whole new loop of feedback to the design process. This extra experience is also highly useful in the teaching of computer-aided design. In a graduate course on Solid Modeling and Rapid Prototyping we have used the design and realization of dissection puzzles as a training tool. Dissection puzzles are particularly valuable design objects, since they not only train spatial understanding, but they also drive home issues concerning accuracy and tolerances in a very "hands-on" manner. In this poster and in the accompanying models we demonstrate some of the dissection models that we studied and elucidate the modeling issues associated with each type.