VTK/Examples/Python/TriangleColoredPoints

import vtk
from vtk import *
import hybrid
from hybrid import *
 
#setup points and vertices
Points = vtk.vtkPoints()
Vertices = vtk.vtkCellArray()
 
id = Points.InsertNextPoint(1.0, 0.0, 0.0)
Vertices.InsertNextCell(1)
Vertices.InsertCellPoint(id)
id = Points.InsertNextPoint(0.0, 0.0, 0.0)
Vertices.InsertNextCell(1)
Vertices.InsertCellPoint(id)
id = Points.InsertNextPoint(0.0, 1.0, 0.0)
Vertices.InsertNextCell(1)
Vertices.InsertCellPoint(id)
 
#setup colors
Colors = vtk.vtkUnsignedCharArray()
Colors.SetNumberOfComponents(3)
Colors.SetName("Colors")
Colors.InsertNextTuple3(255,0,0)
Colors.InsertNextTuple3(0,255,0)
Colors.InsertNextTuple3(0,0,255)
 
polydata = vtk.vtkPolyData()
polydata.SetPoints(Points)
polydata.SetVerts(Vertices)
polydata.GetPointData().SetScalars(Colors)
polydata.Modified()
polydata.Update()
 
writer = vtk.vtkXMLPolyDataWriter()
writer.SetFileName("TriangleColoredPoints.vtp")
writer.SetInput(polydata)
writer.Write()