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Overview
Our work on modeling with subdivision surfaces is part of a joint
project between
IBM,
NYU, and
Dassault Systemes.
The primary goal of
this project is to explore the applicability of subdivision techniques
to interactive surface editing for shape design.
Cut-and-paste editing
Our most recent work is related to the design and implementation of an
interactive cut-and-paste tool for surfaces. The basic idea is similar
to image cutting and pasting, in which a source region of an image is
selected, extracted, and pasted at a target location in the same or in
another image. In the case of surfaces, complications arise from the
need to define what part of a surface constitutes detail to be
transferred and what part is the base with respect to which the
details are expressed. In addition to addressing this issue, we
developed algorithms for target area identification, for establishing
a map between the source and target regions involved in pasting, and
we paid careful attention to efficiency, to allow for interactive
manipulation of the pasted feature on the target surface. Read more.
Sharp features & trimming
We developed a method for creating sharp features and trim regions on
multiresolution subdivision surfaces along a set of user-defined
curves. The novelty of our work lies in the ability to create sharp
features and trim boundaries anywhere on a surface and in the fact
that the resulting representation remains within the multiresolution
subdivision framework. Preserving the original representation has the
advantage that other operations applicable to multiresolution
subdivision surfaces can subsequently be applied to the edited
model. Read more.
Variational design We have also investigated
the issue of interactively deforming an initial geometric shape to
obtain a new one that satisfies certain requirements. These
requirements are formulated as a set of constraints and the underlying
geometric representation is modified to meet these constraints. We
have designed and implemented a prototype variational modeler that
allows interactive editing of complex objects of arbitrary
topology. We take advantage of our underlying multiresolution
representation to allow editing at different scales. Most
importantly, we preserve original detail during editing in a natural
way.
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