Beat D. Brüderlin

TL;DR: This paper describes ‘Quick-sketch’, a 2D and 3D modelling tool for pen-based computers that can be used as a hand sketching front-end to more sophisticated modelling, rendering or animation systems.

TL;DR: The purpose of this research is to simplify and improve the effectiveness of the interactive definition of geometric objects in computer aided geometric modeling, and to demonstrate the practicability of the proposed approach, a geometric modeling system was implemented.

TL;DR: This paper describes ‘Quick-sketch’, a 2d and 3d modeling tool for pen based computers that can be used as a front-end to more sophisticated modeling, rendering or animation environments, serving as a hand sketching tool in the preliminary design phase.

TL;DR: This research presents a first step in finding a geometric alternative to the numerical and computer algebra methods currently used for such problems and, thus, has the potential of supporting geometric applications such as computer-aided geometric design.

TL;DR: It is shown that redundant computation can be avoided by correctly ordering the operations, and redundant data can be eliminated in the solid representation, so that the result is guaranteed to be a valid two-manifold solid.