hello, i am Chinese student , so English is poor. you can get delaunay3D's Topology. next can get every Tri 's point ids. -- View this message in context: http://vtk.1045678.n5.nabble.com/Get-vertices-and-faces-from-delaunay3D-tp5719892p5719918.html Sent from the VTK - Users mailing list archive at Nabble.com.