Warren N. Waggenspack

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Since the advent of computer-based geometric modeling, designers have tried to develop modeling and deformation tools that allow users to emulate the ease with which sculptors work with clay. T.W. Sederberg and S.R. Parry (1986) demonstrated the application of free-form deformations. FFDs let the user conceptually embed an object in a clear pliable solid(More)
A new algorithm is presented for the automatic derivation of the surface topologies of a 3D volume from its wireframe representation. This fundamentally new approach overcomes the limitations of the currently known methods, and it relaxes the restriction to manifold solids without holes. A fundamental concept from topology, i .e. that a tetrahedron is the(More)
An approach improving on existing techniques is presented for blending cross-sections of biological objects to produce a polynomial surface model. As intermediate steps to the final surface skinning, representative data points on the cross-sections are selected for defining piecewise cubic B-splines providing an immediate reduction in storage and(More)
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