# TriangleStrip

VTKExamples/Python/GeometricObjects/TriangleStrip

### Description¶

The triangle strip is a composite two-dimensional cell consisting of one or more triangles. The points defining the triangle strip need not lie in a plane. The triangle strip is defined by an ordered list of n+2 points, where n is the number of triangles. The ordering of the points is such that each set of three points defines a triangle.

Info

See this wikipedia article for an explanation.

Other Languages

See (Cxx), (Java), (CSharp)

Question

### Code¶

TriangleStrip.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import vtk

def main():
colors = vtk.vtkNamedColors()

points = vtk.vtkPoints()
points.InsertNextPoint(0, 0, 0)
points.InsertNextPoint(0, 1, 0)
points.InsertNextPoint(1, 0, 0)
points.InsertNextPoint(1.5, 1, 0)

triangleStrip = vtk.vtkTriangleStrip()
triangleStrip.GetPointIds().SetNumberOfIds(4)
triangleStrip.GetPointIds().SetId(0, 0)
triangleStrip.GetPointIds().SetId(1, 1)
triangleStrip.GetPointIds().SetId(2, 2)
triangleStrip.GetPointIds().SetId(3, 3)

cells = vtk.vtkCellArray()
cells.InsertNextCell(triangleStrip)

polydata = vtk.vtkPolyData()
polydata.SetPoints(points)
polydata.SetStrips(cells)

# Create an actor and mapper
mapper = vtk.vtkDataSetMapper()
mapper.SetInputData(polydata)
actor = vtk.vtkActor()
actor.SetMapper(mapper)
actor.GetProperty().SetColor(colors.GetColor3d("Cyan"))
actor.GetProperty().SetRepresentationToWireframe()

# Create a renderer, render window, and interactor
renderer = vtk.vtkRenderer()
renderWindow = vtk.vtkRenderWindow()
renderWindow.SetWindowName("Triangle Strip")