# VTK/Examples/Cxx/GeometricObjects/TriangleStrip

< VTK‎ | Examples‎ | Cxx

A triangle strip is a compact representation of a series of triangles. See this wikipedia article for an explanation.

## TriangleStrip.cxx

```#include <vtkVersion.h>
#include <vtkActor.h>
#include <vtkCellArray.h>
#include <vtkDataSetMapper.h>
#include <vtkPoints.h>
#include <vtkPolyData.h>
#include <vtkProperty.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSmartPointer.h>
#include <vtkTriangleStrip.h>

int main(int, char *[])
{
vtkSmartPointer<vtkPoints> points =
vtkSmartPointer<vtkPoints>::New();
points->InsertNextPoint(0,0,0);
points->InsertNextPoint(0,1,0);
points->InsertNextPoint(1,0,0);
points->InsertNextPoint(1.5,1,0);

vtkSmartPointer<vtkTriangleStrip> triangleStrip =
vtkSmartPointer<vtkTriangleStrip>::New();
triangleStrip->GetPointIds()->SetNumberOfIds(4);
triangleStrip->GetPointIds()->SetId(0,0);
triangleStrip->GetPointIds()->SetId(1,1);
triangleStrip->GetPointIds()->SetId(2,2);
triangleStrip->GetPointIds()->SetId(3,3);

vtkSmartPointer<vtkCellArray> cells =
vtkSmartPointer<vtkCellArray>::New();
cells->InsertNextCell(triangleStrip);

vtkSmartPointer<vtkPolyData> polydata =
vtkSmartPointer<vtkPolyData>::New();
polydata->SetPoints(points);
polydata->SetStrips(cells);

// Create an actor and mapper
vtkSmartPointer<vtkDataSetMapper> mapper =
vtkSmartPointer<vtkDataSetMapper>::New();
#if VTK_MAJOR_VERSION <= 5
mapper->SetInput(polydata);
#else
mapper->SetInputData(polydata);
#endif

vtkSmartPointer<vtkActor> actor =
vtkSmartPointer<vtkActor>::New();
actor->SetMapper(mapper);
actor->GetProperty()->SetRepresentationToWireframe();

// Create a renderer, render window, and interactor
vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
renderWindowInteractor->SetRenderWindow(renderWindow);

renderWindow->Render();
renderWindowInteractor->Start();

return EXIT_SUCCESS;
}
```

# Please try the new VTKExamples website.

## CMakeLists.txt

```cmake_minimum_required(VERSION 2.8)

PROJECT(TriangleStrip)

find_package(VTK REQUIRED)
include(\${VTK_USE_FILE})

if(VTK_LIBRARIES)
else()
endif()
```

```cd TriangleStrip/build
```
• If VTK is installed:
```cmake ..
```
• If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:
```cmake -DVTK_DIR:PATH=/home/me/vtk_build ..
```

Build the project:

```make
```

and run it:

```./TriangleStrip
```

WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.