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¶
Danger
The generation of tar files has not been ported to the new VTKExamples. Some tarballs may be missing or out-of-date.
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.