Difference between revisions of "VTK/Examples/Cxx/PolyData/CellCenters"

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<div class="floatright">[[File:VTK_Examples_Baseline_PolyData_TestCellCenters.png]]</div>
 
==CellCenters.cxx==
 
==CellCenters.cxx==
 
<source lang="cpp">
 
<source lang="cpp">

Revision as of 16:28, 30 July 2010

VTK Examples Baseline PolyData TestCellCenters.png

CellCenters.cxx

#include <vtkSmartPointer.h>
#include <vtkImageData.h>
#include <vtkProperty.h>
#include <vtkCellCenters.h>
#include <vtkDataSetMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>

int main(int, char *[])
{
   //create an image data
  vtkSmartPointer<vtkImageData> imageData = 
      vtkSmartPointer<vtkImageData>::New();
  
  //specify the size of the image data
  imageData->SetDimensions(3,3,2);
  imageData->SetSpacing(1.0, 1.0, 1.0);
  imageData->SetOrigin(0.0, 0.0, 0.0);
  
  vtkSmartPointer<vtkCellCenters> cellCentersFilter = 
      vtkSmartPointer<vtkCellCenters>::New();
  cellCentersFilter->SetInputConnection(imageData->GetProducerPort());
  cellCentersFilter->VertexCellsOn();
  cellCentersFilter->Update();
  
  //access the cell centers
  for(vtkIdType i = 0; i < cellCentersFilter->GetOutput()->GetNumberOfPoints(); i++)
    {
    double p[3];
    cellCentersFilter->GetOutput()->GetPoint(i, p);
    cout << "Point " << i << " : " << p[0] << " , " << p[1] << " , " << p[2] << endl;
    }

  //display the cell centers
    vtkSmartPointer<vtkDataSetMapper> centerMapper = 
      vtkSmartPointer<vtkDataSetMapper>::New();
  centerMapper->SetInputConnection(cellCentersFilter->GetOutputPort());
  vtkSmartPointer<vtkActor> centerActor = 
      vtkSmartPointer<vtkActor>::New();
  centerActor->SetMapper(centerMapper);
  
  vtkSmartPointer<vtkDataSetMapper> mapper = 
      vtkSmartPointer<vtkDataSetMapper>::New();
  mapper->SetInputConnection(imageData->GetProducerPort());
  vtkSmartPointer<vtkActor> actor = 
      vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);
  actor->GetProperty()->SetRepresentationToWireframe();
    
  vtkSmartPointer<vtkRenderWindow> renderWindow = 
      vtkSmartPointer<vtkRenderWindow>::New();
  
  vtkSmartPointer<vtkRenderer> renderer = 
      vtkSmartPointer<vtkRenderer>::New();
  
  renderWindow->AddRenderer(renderer);

  renderer->AddActor(actor);
  renderer->AddActor(centerActor);
  
  renderer->ResetCamera();
  
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = 
      vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);
  renderWindow->Render();
  renderWindowInteractor->Start();
  
  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.6)
PROJECT(CellCenters)

FIND_PACKAGE(VTK REQUIRED)
INCLUDE(${VTK_USE_FILE})

ADD_EXECUTABLE(CellCenters CellCenters.cxx)
TARGET_LINK_LIBRARIES(CellCenters vtkHybrid)