on a drawing surface Ds, and associates the stroke to the
corresponding region of the 3D model to deform its mesh.
Region definition. We define a region Kas a set of rig elements
(joints, for the sake of the explanation) fj
0
,::,j
n1
g, which are
manipulated by a stroke (seeFig. 3). The user can define the
regions in real time during the sketching process or in a setup
stage (for details on the setup stage seeSection 5.1.1)