Direct manipulation of surfaces using NURBS-based free-form deformations

Author

Noble, Robert A. ; Clapworthy, Gordon J.

Author_Institution

Dept. of Math. & Comput., Robert Gordon´´s Inst. of Technol., Aberdeen, UK

fYear

1999

fDate

1999

Firstpage

238

Lastpage

243

Abstract

The paper demonstrates how NURBS-based Free-Form Deformations (NFFDs) can be used to generate and sculpt NURBS based objects in a way that avoids many of the limitations of ordinary FFDs. A system is described in which the user interacts with the NFFD through a set of direct acting tools, removing the need to manipulate the mesh directly. As the user applies the tools to the object, the NFFD is updated automatically. Objects are represented as isosurfaces of the NFFD volume, giving a good insight into the way an NFFD would deform a general object

Keywords

computational geometry; deformation; splines (mathematics); user interfaces; NFFDs; NURBS based free-form deformations; NURBS based objects; direct acting tools; direct surface manipulation; general object deformation; geometric modelling; isosurfaces; parametric surfaces; user interaction; Animation; Deformable models; Electrical capacitance tomography; Mathematics; Mesh generation; Shape control; Solid modeling; Spline; Surface reconstruction; Surface topography;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Visualization, 1999. Proceedings. 1999 IEEE International Conference on

Conference_Location

London

ISSN

1093-9547

Print_ISBN

0-7695-0210-5

Type

conf

DOI

10.1109/IV.1999.781565

Filename

781565