ShrinkPolyData

VTKExamples/Cxx/PolyData/ShrinkPolyData


Code

ShrinkPolyData.cxx

#include <vtkSmartPointer.h>

#include <vtkShrinkPolyData.h>
#include <vtkSphereSource.h>

#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkCamera.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkXMLPolyDataReader.h>

#include <vtkNamedColors.h>

int main(int argc, char *argv[])
{
  vtkSmartPointer<vtkPolyData> inputPolyData;
  if(argc > 1)
  {
    vtkSmartPointer<vtkXMLPolyDataReader> reader =
      vtkSmartPointer<vtkXMLPolyDataReader>::New();
    reader->SetFileName(argv[1]);
    reader->Update();
    inputPolyData = reader->GetOutput();
  }
  else
  {
    vtkSmartPointer<vtkSphereSource> sphereSource =
      vtkSmartPointer<vtkSphereSource>::New();
    sphereSource->SetPhiResolution(15);
    sphereSource->SetThetaResolution(15);
    sphereSource->Update();
    inputPolyData = sphereSource->GetOutput();
  }

  vtkSmartPointer<vtkNamedColors> colors =
    vtkSmartPointer<vtkNamedColors>::New();

  vtkSmartPointer<vtkShrinkPolyData> shrink =
    vtkSmartPointer<vtkShrinkPolyData>::New();
  shrink->SetShrinkFactor(.8);
  shrink->SetInputData(inputPolyData);

  // Visualize
  vtkSmartPointer<vtkRenderer> renderer =
    vtkSmartPointer<vtkRenderer>::New();

  vtkSmartPointer<vtkRenderWindow> renderWindow =
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);

  vtkSmartPointer<vtkRenderWindowInteractor> interactor =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  interactor->SetRenderWindow(renderWindow);

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

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

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

  renderer->AddActor(actor);
  renderer->SetBackground(colors->GetColor3d("Burlywood").GetData());
  renderer->ResetCamera();
  renderer->GetActiveCamera()->Azimuth(30);
  renderer->GetActiveCamera()->Elevation(30);
  renderer->GetActiveCamera()->Dolly(1.5);;
  renderer->ResetCameraClippingRange();

  renderWindow->SetSize(640, 480);
  renderWindow->Render();
  interactor->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(ShrinkPolyData)

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

add_executable(ShrinkPolyData MACOSX_BUNDLE ShrinkPolyData.cxx )

target_link_libraries(ShrinkPolyData ${VTK_LIBRARIES})

Download and Build ShrinkPolyData

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

cd ShrinkPolyData/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:

./ShrinkPolyData

WINDOWS USERS

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