VTK/Examples/Cxx/GeometricObjects/RegularPolygonSource

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Revision as of 20:35, 9 December 2012 by Lorensen (Talk | contribs)

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This example creates a pentagon.

RegularPolygonSource.cxx

#include <vtkRegularPolygonSource.h>
#include <vtkPolyData.h>
#include <vtkSmartPointer.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
 
int main(int , char *[])
{
  // Create a pentagon
  vtkSmartPointer<vtkRegularPolygonSource> polygonSource = 
    vtkSmartPointer<vtkRegularPolygonSource>::New();
 
  //polygonSource->GeneratePolygonOff();
  polygonSource->SetNumberOfSides(5);
  polygonSource->SetRadius(5);
  polygonSource->SetCenter(0,0,0);
  polygonSource->Update();
 
  vtkSmartPointer<vtkPolyDataMapper> mapper =
    vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper->SetInputConnection(polygonSource->GetOutputPort());
  vtkSmartPointer<vtkActor> actor =
    vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);
 
  vtkSmartPointer<vtkRenderer> renderer =
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow =
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);
 
  renderer->AddActor(actor);
  renderer->SetBackground(.3,.3,.5); // Background color purple
 
  renderWindow->Render();
  renderWindowInteractor->Start();
 
  return EXIT_SUCCESS;
}

Please try the new VTKExamples website.

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)
 
if(VTK_LIBRARIES)
  target_link_libraries(RegularPolygonSource ${VTK_LIBRARIES})
else()
  target_link_libraries(RegularPolygonSource vtkHybrid vtkWidgets)
endif()

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