RectilinearGridToTetrahedra
VTKExamples/Cxx/RectilinearGrid/RectilinearGridToTetrahedra
Code¶
RectilinearGridToTetrahedra.cxx
#include <vtkVersion.h> #include <vtkSmartPointer.h> #include <vtkXMLUnstructuredGridWriter.h> #include <vtkRectilinearGrid.h> #include <vtkRectilinearGridToTetrahedra.h> #include <vtkUnstructuredGrid.h> #include <vtkMath.h> #include <vtkDoubleArray.h> int main(int, char *[]) { // Create a grid vtkSmartPointer<vtkRectilinearGrid> grid = vtkSmartPointer<vtkRectilinearGrid>::New(); grid->SetDimensions(5,4,3); vtkSmartPointer<vtkDoubleArray> xArray = vtkSmartPointer<vtkDoubleArray>::New(); xArray->InsertNextValue(0.0); xArray->InsertNextValue(1.0); xArray->InsertNextValue(2.0); xArray->InsertNextValue(3.0); xArray->InsertNextValue(4.0); vtkSmartPointer<vtkDoubleArray> yArray = vtkSmartPointer<vtkDoubleArray>::New(); yArray->InsertNextValue(0.0); yArray->InsertNextValue(1.0); yArray->InsertNextValue(2.0); yArray->InsertNextValue(3.0); vtkSmartPointer<vtkDoubleArray> zArray = vtkSmartPointer<vtkDoubleArray>::New(); zArray->InsertNextValue(0.0); zArray->InsertNextValue(1.0); zArray->InsertNextValue(2.0); grid->SetXCoordinates(xArray); grid->SetYCoordinates(yArray); grid->SetZCoordinates(zArray); vtkSmartPointer<vtkRectilinearGridToTetrahedra> rectilinearGridToTetrahedra = vtkSmartPointer<vtkRectilinearGridToTetrahedra>::New(); #if VTK_MAJOR_VERSION <= 5 rectilinearGridToTetrahedra->SetInputConnection(grid->GetProducerPort()); #else rectilinearGridToTetrahedra->SetInputData(grid); #endif rectilinearGridToTetrahedra->Update(); vtkSmartPointer<vtkXMLUnstructuredGridWriter> writer = vtkSmartPointer<vtkXMLUnstructuredGridWriter>::New(); writer->SetFileName("output.vtu"); writer->SetInputConnection(rectilinearGridToTetrahedra->GetOutputPort()); writer->Write(); std::cout << "There are " << rectilinearGridToTetrahedra->GetOutput()->GetNumberOfCells() << " cells." << std::endl; return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(RectilinearGridToTetrahedra) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(RectilinearGridToTetrahedra MACOSX_BUNDLE RectilinearGridToTetrahedra.cxx) target_link_libraries(RectilinearGridToTetrahedra ${VTK_LIBRARIES})
Download and Build RectilinearGridToTetrahedra¶
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Click here to download RectilinearGridToTetrahedra and its CMakeLists.txt file. Once the tarball RectilinearGridToTetrahedra.tar has been downloaded and extracted,
cd RectilinearGridToTetrahedra/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:
./RectilinearGridToTetrahedra
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.