OBBDicer
VTKExamples/Cxx/Meshes/OBBDicer
Description¶
The vtkOBBDicer filter breaks up an input mesh into a number of pieces. The resulting mesh contains scalar point data that can be used to extract the individual pieces with a filter like vtkThresholdFilter. This examples displays the output of vtkOBBDicer with a different color for each piece.
Code¶
OBBDicer.cxx
#include <vtkVersion.h> #include <vtkSmartPointer.h> #include <vtkActor.h> #include <vtkOBBDicer.h> #include <vtkOutlineCornerFilter.h> #include <vtkPolyDataMapper.h> #include <vtkProperty.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkRenderer.h> #include <vtkSphereSource.h> #include <vtkXMLPolyDataReader.h> int main(int argc, char *argv[]) { vtkSmartPointer<vtkPolyData> inputPolyData; if(argc > 1) { vtkSmartPointer<vtkXMLPolyDataReader> reader = vtkSmartPointer<vtkXMLPolyDataReader>::New(); reader->SetFileName(argv[1]); reader->Update(); inputPolyData = reader->GetOutput(); } else { vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New(); sphereSource->SetThetaResolution(30); sphereSource->SetPhiResolution(15); sphereSource->Update(); inputPolyData = sphereSource->GetOutput(); } // Create pipeline vtkSmartPointer<vtkOBBDicer> dicer = vtkSmartPointer<vtkOBBDicer>::New(); #if VTK_MAJOR_VERSION <= 5 dicer->SetInput(inputPolyData); #else dicer->SetInputData(inputPolyData); #endif dicer->SetNumberOfPieces(4); dicer->SetDiceModeToSpecifiedNumberOfPieces(); dicer->Update(); vtkSmartPointer<vtkPolyDataMapper> inputMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); inputMapper->SetInputConnection(dicer->GetOutputPort()); inputMapper->SetScalarRange(0, dicer->GetNumberOfActualPieces()); std::cout << "Asked for: " << dicer->GetNumberOfPieces() << " pieces, got: " << dicer->GetNumberOfActualPieces() << std::endl; vtkSmartPointer<vtkActor> inputActor = vtkSmartPointer<vtkActor>::New(); inputActor->SetMapper(inputMapper); inputActor->GetProperty()->SetInterpolationToFlat(); vtkSmartPointer<vtkOutlineCornerFilter> outline = vtkSmartPointer<vtkOutlineCornerFilter>::New(); #if VTK_MAJOR_VERSION <= 5 outline->SetInput(inputPolyData); #else outline->SetInputData(inputPolyData); #endif vtkSmartPointer<vtkPolyDataMapper> outlineMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); outlineMapper->SetInputConnection(outline->GetOutputPort()); vtkSmartPointer<vtkActor> outlineActor = vtkSmartPointer<vtkActor>::New(); outlineActor->SetMapper(outlineMapper); outlineActor->GetProperty()->SetColor(0, 0, 0); vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> interactor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); interactor->SetRenderWindow(renderWindow); // Add the actors to the renderer, set the background and size renderer->AddActor(outlineActor); renderer->AddActor(inputActor); renderer->SetBackground(.2, .3, .4); // Render the image renderWindow->Render(); interactor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(OBBDicer) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(OBBDicer MACOSX_BUNDLE OBBDicer.cxx) target_link_libraries(OBBDicer ${VTK_LIBRARIES})
Download and Build OBBDicer¶
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 OBBDicer and its CMakeLists.txt file. Once the tarball OBBDicer.tar has been downloaded and extracted,
cd OBBDicer/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:
./OBBDicer
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.