NURBS-based free-form deformations

Author

Lamousin, Henry J. ; Waggenspack, Warren N., Jr.

Author_Institution

Dept. of Mech. Eng., Louisiana State Univ., Baton Rouge, LA, USA

Volume

14

Issue

6

fYear

1994

Firstpage

59

Lastpage

65

Abstract

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 and apply deformations to the solid, which then carry through to the encased object. We describe a technique that logically extends current FFDs by basing them on nonuniform rational B-splines. The resulting NURBS-based FFDs (NFFDs) offer flexibility and control not achieved in prior implementations. We conclude by describing a straightforward combination of this technique with global and local deformations of solid primitives used to animate a lifelike surface model of the human leg.<>

Keywords

computer animation; deformation; solid modelling; splines (mathematics); NFFDs; NURBS-based FFDs; NURBS-based free-form deformations; animation; clear pliable solid; computer-based geometric modeling; deformation tools; encased object; human leg; lifelike surface model; local deformations; nonuniform rational B-splines; solid modelling; solid primitives; Animation; Application software; Deformable models; Humans; Lattices; Leg; Solids; Spline; Surface fitting; Topology;

fLanguage

English

Journal_Title

Computer Graphics and Applications, IEEE

Publisher

ieee

ISSN

0272-1716

Type

jour

DOI

10.1109/38.329096

Filename

329096