CellCenters
VTKExamples/Cxx/PolyData/CellCenters
Code
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;
}
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)
target_link_libraries(CellCenters ${VTK_LIBRARIES})
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.