A Sketch-Based Method to Control Deformation in a Skeletal Implicit Surface Modeler

Sugihara, Masamichi; Groot, Erwin de; Wyvill, Brian; Schmidt, Ryan

A Sketch-Based Method to Control Deformation in a Skeletal Implicit Surface Modeler

Files

065-072.pdf (349.53 KB)

Date

2008

Authors

Sugihara, Masamichi
Groot, Erwin de
Wyvill, Brian
Schmidt, Ryan

Publisher

The Eurographics Association

Abstract

Skeletal implicit surfaces offer many advantages for sketch-based modeling systems, such as blending, CSG, and a procedural object hierarchy. Free-form deformation (FFD) is also extremely useful in this context, however existing FFD approaches do not support implicit surface representations, and FFD lattice manipulation is timeconsuming compared to sketch-based techniques. In this paper, we describe an FFD technique suitable for implicit surface representations. To enhance real-time feedback, we split the problem into an approximate formulation used during interactive deformation, and a more robust variational technique which preserves desirable scalar field properties. As an interface to manipulate the deformation, we introduce a sketch-based volumetric peeling interface. The designer's task is to draw a curve on the surface, and pull or push the surface to the desirable position via the curve. Subsequently, the deformation is automatically defined. Results show that a desirable deformation can be easily achieved while preserving implicit properties.

        @inproceedings{:10.2312/SBM/SBM08/065-072
,
booktitle = {Eurographics Workshop on Sketch-Based Interfaces and Modeling
},
editor = {Christine Alvarado and Marie-Paule Cani
},
title = {{A Sketch-Based Method to Control Deformation in a Skeletal Implicit Surface Modeler
}},
author = {Sugihara, Masamichi and 
Groot, Erwin de and 
Wyvill, Brian and 
Schmidt, Ryan
},
year = {2008
},
publisher = {The Eurographics Association
},
ISSN = {1812-3503
},
ISBN = {978-3-905674-07-1
},
DOI = {/10.2312/SBM/SBM08/065-072
}
}