Abstract
A technique is presented for generating implicit sweep objects that
support direct specification and manipulation of the surface with no
topological limitations on the 2D sweep template. The novelty of this method
is that the underlying scalar field is bounded and C1 continuous, apart from
surface creases. Bounded scalar fields guarantee local in- fluence when
modeling with implicit surfaces, an important usbility requirement for
interactive modeling. A discrete approximation is also described that supports
fast evaluation for bounded scalar fields. The new sweep objects are
implemented in an interactive BlobTree modeling tool, providing an intuitive
and expressive free-form implicit modeling component. This sweep
representation permits conversion of parametric sweep surfaces to implicit
volumes. An application to volume reconstruction from parallel contours is
also explored.
Notes
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