Spline Interface for Intuitive Skinning Weight Editing

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Despite the recent advances in automatic methods for computing skinning weights, manual intervention is still indispensable to produce high-quality character deformation. However, current modeling software does not provide efficient tools for the manual definition of skinning weights. Widely used paint-based interfaces give users high degrees of freedom, but at the expense of significant efforts and time. This article presents a novel interface for editing skinning weights based on splines, which represent the isolines of skinning weights on a mesh. When a user drags a small number of spline anchor points, our method updates the shape of the isolines and smoothly interpolates or propagates the weights while respecting the given iso-value on the spline. We introduce several techniques to enable the interface to run in real-time and propose a particular combination of functions that generates appropriate skinning weight over the surface. Users can create skinning weights from scratch by using our method. In addition, we present the spline and the gradient fitting methods that closely approximate initial given weights, so that a user can modify the weights with our spline interface. We show the effectiveness of our spline-based interface through a number of test cases. © 2018 Association for Computing Machinery.
Publisher
ASSOC COMPUTING MACHINERY
Issue Date
2018-11
Language
English
Article Type
Article
Citation

ACM TRANSACTIONS ON GRAPHICS, v.37, no.5, pp.1 - 14

ISSN
0730-0301
DOI
10.1145/3186565
URI
http://hdl.handle.net/10203/248267
Appears in Collection
GCT-Journal Papers(저널논문)
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