VTK/Examples/Python/TriangleCorners

import vtk
from vtk import *
import hybrid
from hybrid import *
 
Points = vtk.vtkPoints()
Points.InsertNextPoint(1.0, 0.0, 0.0)
Points.InsertNextPoint(0.0, 0.0, 0.0)
Points.InsertNextPoint(0.0, 1.0, 0.0)
 
polydata = vtk.vtkPolyData()
polydata.SetPoints(Points)
polydata.Update()
 
writer = vtk.vtkXMLPolyDataWriter();
writer.SetFileName("TrianglePoints.vtp");
writer.SetInput(polydata);
writer.Write();