RegularPolygonSource

VTKExamples/Cxx/GeometricObjects/RegularPolygonSource


Description

This example creates a pentagon.

Code

RegularPolygonSource.cxx

#include <vtkActor.h>
#include <vtkNamedColors.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRegularPolygonSource.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkShrinkPolyData.h>
#include <vtkSmartPointer.h>

int main(int , char *[])
{
  vtkSmartPointer<vtkNamedColors> colors =
    vtkSmartPointer<vtkNamedColors>::New();

  // Create a pentagon
  vtkSmartPointer<vtkRegularPolygonSource> polygonSource = 
    vtkSmartPointer<vtkRegularPolygonSource>::New();
  polygonSource->SetNumberOfSides(5);
  polygonSource->SetRadius(5);
  polygonSource->SetCenter(0,0,0);

  vtkSmartPointer<vtkShrinkPolyData> shrink =
    vtkSmartPointer<vtkShrinkPolyData>::New();
  shrink->SetInputConnection(polygonSource->GetOutputPort());
  shrink->SetShrinkFactor(.9);

  vtkSmartPointer<vtkPolyDataMapper> mapper =
    vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper->SetInputConnection(shrink->GetOutputPort());

  vtkSmartPointer<vtkProperty> back =
    vtkSmartPointer<vtkProperty>::New();
  back->SetColor(colors->GetColor3d("Tomato").GetData());

  vtkSmartPointer<vtkActor> actor =
    vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);
  actor->GetProperty()->EdgeVisibilityOn();
  actor->GetProperty()->SetLineWidth(5);
  actor->GetProperty()->SetColor(colors->GetColor3d("Banana").GetData());
  actor->SetBackfaceProperty(back);

  vtkSmartPointer<vtkRenderer> renderer =
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow =
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->SetWindowName("Regular Polygon Source");
  renderWindow->AddRenderer(renderer);
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);

  renderer->AddActor(actor);
  renderer->SetBackground(colors->GetColor3d("Silver").GetData());

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

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(RegularPolygonSource)

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

add_executable(RegularPolygonSource MACOSX_BUNDLE RegularPolygonSource.cxx )

target_link_libraries(RegularPolygonSource ${VTK_LIBRARIES})

Download and Build RegularPolygonSource

Click here to download RegularPolygonSource and its CMakeLists.txt file. Once the tarball RegularPolygonSource.tar has been downloaded and extracted,

cd RegularPolygonSource/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:

./RegularPolygonSource

WINDOWS USERS

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