Sorry, I can now get the information. The way is: "actor"->GetMapper()->GetInput()->GetPoint(vtkIdType, double[3]); Thank you... -- View this message in context: http://vtk.1045678.n5.nabble.com/Information-of-vtkActor-points-and-coordinates-tp3396912p3396932.html Sent from the VTK - Users mailing list archive at Nabble.com.