On Thu, Sep 8, 2011 at 1:13 PM, Wenlong Wang <scc.wwl at gmail.com> wrote: > Dear all, > > Is there anyone knows how to use vtkPolyDataNormals to get the surface > normal from a 3D mesh? > > Thank you so much for your kindly help. > > Bests > Wenlong Have you seen this? http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/PolyDataExtractNormals David