Difference between revisions of "VTK/Examples/Cxx/Meshes/QuadricDecimation"

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(Replaced content with "= '''See [https://lorensen.github.io/VTKExamples/site/Cxx/Meshes/QuadricDecimation QuadricDecimation] on the new [https://lorensen.github.io/VTKExamples/site/ VTKExamples...")
 
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<div class="floatright">[[File:VTK_Examples_Baseline_Meshes_TestQuadricDecimation.png|300px]]</div>
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= '''See [https://lorensen.github.io/VTKExamples/site/Cxx/Meshes/QuadricDecimation QuadricDecimation] on the new [https://lorensen.github.io/VTKExamples/site/ VTKExamples website].''' =
==QuadricDecimation.cxx==
 
<source lang="cpp">
 
#include <vtkPolyData.h>
 
#include <vtkSphereSource.h>
 
#include <vtkQuadricDecimation.h>
 
#include <vtkXMLPolyDataReader.h>
 
#include <vtkSmartPointer.h>
 
#include <vtkPolyDataMapper.h>
 
#include <vtkProperty.h>
 
#include <vtkRenderWindow.h>
 
#include <vtkRenderWindowInteractor.h>
 
#include <vtkRenderer.h>
 
#include <vtkCamera.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->SetThetaResolution(30);
 
    sphereSource->SetPhiResolution(15);
 
    sphereSource->Update();
 
    inputPolyData = sphereSource->GetOutput();
 
    }
 
 
 
  std::cout << "Before decimation" << std::endl << "------------" << std::endl;
 
  std::cout << "There are "
 
            << inputPolyData->GetNumberOfPoints() << " points." << std::endl;
 
  std::cout << "There are "
 
            << inputPolyData->GetNumberOfPolys() << " polygons." << std::endl;
 
 
 
  vtkSmartPointer<vtkQuadricDecimation> decimate =
 
    vtkSmartPointer<vtkQuadricDecimation>::New();
 
#if VTK_MAJOR_VERSION <= 5
 
  decimate->SetInputConnection(inputPolyData->GetProducerPort());
 
#else
 
  decimate->SetInputData(inputPolyData);
 
#endif
 
  decimate->Update();
 
 
 
  vtkSmartPointer<vtkPolyData> decimated =
 
    vtkSmartPointer<vtkPolyData>::New();
 
  decimated->ShallowCopy(decimate->GetOutput());
 
 
 
  std::cout << "After decimation" << vtkstd::endl << "------------" << std::endl;
 
 
 
  std::cout << "There are "
 
            << decimated->GetNumberOfPoints() << " points." << std::endl;
 
  std::cout << "There are "
 
            << decimated->GetNumberOfPolys() << " polygons." << std::endl;
 
 
 
  vtkSmartPointer<vtkPolyDataMapper> inputMapper =
 
    vtkSmartPointer<vtkPolyDataMapper>::New();
 
#if VTK_MAJOR_VERSION <= 5
 
  inputMapper->SetInputConnection(inputPolyData->GetProducerPort());
 
#else
 
  inputMapper->SetInputData(inputPolyData);
 
#endif
 
  vtkSmartPointer<vtkActor> inputActor =
 
    vtkSmartPointer<vtkActor>::New();
 
  inputActor->SetMapper(inputMapper);
 
  inputActor->GetProperty()->SetInterpolationToFlat();
 
 
 
  vtkSmartPointer<vtkPolyDataMapper> decimatedMapper =
 
    vtkSmartPointer<vtkPolyDataMapper>::New();
 
#if VTK_MAJOR_VERSION <= 5
 
  decimatedMapper->SetInputConnection(decimated->GetProducerPort());
 
#else
 
  decimatedMapper->SetInputData(decimated);
 
#endif
 
  vtkSmartPointer<vtkActor> decimatedActor =
 
    vtkSmartPointer<vtkActor>::New();
 
  decimatedActor->SetMapper(decimatedMapper);
 
 
 
  // There will be one render window
 
  vtkSmartPointer<vtkRenderWindow> renderWindow =
 
    vtkSmartPointer<vtkRenderWindow>::New();
 
  renderWindow->SetSize(600, 300);
 
 
 
  // And one interactor
 
  vtkSmartPointer<vtkRenderWindowInteractor> interactor =
 
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
 
  interactor->SetRenderWindow(renderWindow);
 
 
 
  // Define viewport ranges
 
  // (xmin, ymin, xmax, ymax)
 
  double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
 
  double rightViewport[4] = {0.5, 0.0, 1.0, 1.0};
 
 
 
  // Setup both renderers
 
  vtkSmartPointer<vtkRenderer> leftRenderer =
 
    vtkSmartPointer<vtkRenderer>::New();
 
  renderWindow->AddRenderer(leftRenderer);
 
  leftRenderer->SetViewport(leftViewport);
 
  leftRenderer->SetBackground(.6, .5, .4);
 
 
 
  vtkSmartPointer<vtkRenderer> rightRenderer =
 
    vtkSmartPointer<vtkRenderer>::New();
 
  renderWindow->AddRenderer(rightRenderer);
 
  rightRenderer->SetViewport(rightViewport);
 
  rightRenderer->SetBackground(.4, .5, .6);
 
 
 
  // Add the sphere to the left and the cube to the right
 
  leftRenderer->AddActor(inputActor);
 
  rightRenderer->AddActor(decimatedActor);
 
 
 
  vtkSmartPointer<vtkCamera> camera =
 
    vtkSmartPointer<vtkCamera>::New();
 
  leftRenderer->SetActiveCamera(camera);
 
  rightRenderer->SetActiveCamera(camera);
 
 
 
  leftRenderer->ResetCamera();
 
 
 
  renderWindow->Render();
 
  interactor->Start();
 
 
 
  return EXIT_SUCCESS;
 
}
 
</source>
 
 
 
{{VTKCMakeLists|QuadricDecimation}}
 

Latest revision as of 18:04, 27 March 2019

See QuadricDecimation on the new VTKExamples website.