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

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(VTK6 migration)
Line 2: Line 2:
 
==CellCenters.cxx==
 
==CellCenters.cxx==
 
<source lang="cpp">
 
<source lang="cpp">
 +
#include <vtkVersion.h>
 
#include <vtkSmartPointer.h>
 
#include <vtkSmartPointer.h>
 
#include <vtkImageData.h>
 
#include <vtkImageData.h>

Revision as of 10:01, 26 April 2012

VTK Examples Baseline PolyData TestCellCenters.png

CellCenters.cxx

#include <vtkVersion.h>
#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();
#if VTK_MAJOR_VERSION <= 5
  cellCentersFilter->SetInputConnection(imageData->GetProducerPort());
#else
  cellCentersFilter->SetInputData(imageData);
#endif
  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();
#if VTK_MAJOR_VERSION <= 5
  mapper->SetInputConnection(imageData->GetProducerPort());
#else
  mapper->SetInputData(imageData);
#endif
  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;
}

Please try the new VTKExamples website.

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(CellCenters)

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

add_executable(CellCenters MACOSX_BUNDLE CellCenters.cxx)

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

Download and Build CellCenters

Click here to download CellCenters. and its CMakeLists.txt file.

Once the tarball CellCenters.tar has been downloaded and extracted,

cd CellCenters/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:

./CellCenters

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.