@techreport{TR-IC-11-14,
   number = {IC-11-14},
   author  =  {Elisa de Cássia Silva Rodrigues and Anamaria Gomide and
                   Jorge Stolfi},
   title  =  {{A User-editable $C^1$-Continuous 2.5D Space Deformation
                   Method For 3D Models}},
   month = {June},
   year = {2011},
   institution = {Institute of Computing, University of Campinas},
   note = {In English, 16 pages.
    \par\selectlanguage{english}\textbf{Abstract}
       Shape  deformation  methods  are  important  in  such fields as
       geometric modeling and computer animation. In biology, modeling
       of   shape,   growth,   movement   and  pathologies  of  living 
       microscopic  organisms  or  cells  require smooth deformations,
       which  are  essentially 2D with little change in depth. In this
       paper, we present a 2.5D space deformation method. The 3D model
       is  modified  by deforming an enclosing control grid of prisms.
       Spline   interpolation   is  used  to  satisfy  the  smoothness 
       requirement.  We  implemented  this  method  in an editor which
       makes it possible to define and modify the deformation with the
       mouse  in  a  user-friendly  way. The experimental results show
       that the method is simple and effective.
  }
}