Hi, I have a poly data of a cylinder, but this is not created using vtkCylinderSource. How can I calculate the radius and length of this poly data. Kindly help. Thanks Nanditha _______________________________________________________________________ Odomos - the only mosquito protection outside 4 walls - Click here to know more! http://r.rediff.com/r?http://clients.rediff.com/odomos/Odomos.htm&&odomos&&wn