ModifiedBSPTreeExtractCells
VTKExamples/Cxx/DataStructures/ModifiedBSPTreeExtractCells
Code¶
ModifiedBSPTreeExtractCells.cxx
#include <vtkSmartPointer.h> #include <vtkSphereSource.h> #include <vtkPoints.h> #include <vtkIdList.h> #include <vtkPolyData.h> #include <vtkPointData.h> #include <vtkLine.h> #include <vtkLineSource.h> #include <vtkExtractCells.h> #include <vtkModifiedBSPTree.h> #include <vtkPolyDataMapper.h> #include <vtkDataSetMapper.h> #include <vtkActor.h> #include <vtkProperty.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> int main(int, char *[]) { vtkSmartPointer<vtkSphereSource> sphereSource = vtkSmartPointer<vtkSphereSource>::New(); sphereSource->SetPhiResolution(7); sphereSource->SetThetaResolution(15); sphereSource->Update(); // Create the locator vtkSmartPointer<vtkModifiedBSPTree> tree = vtkSmartPointer<vtkModifiedBSPTree>::New(); tree->SetDataSet(sphereSource->GetOutput()); // Intersect the locator with the line double lineP0[3] = {-0.6, -0.6, -0.6}; double lineP1[3] = {.6, .6, .6}; vtkSmartPointer<vtkPoints> intersectPoints = vtkSmartPointer<vtkPoints>::New(); vtkSmartPointer<vtkIdList> intersectCells = vtkSmartPointer<vtkIdList>::New(); double tol = 1.e-8; tree->IntersectWithLine(lineP0, lineP1, tol, intersectPoints, intersectCells); std::cout << "NumPoints: " << intersectPoints->GetNumberOfPoints() << std::endl; // Display list of intersections double intersection[3]; for(int i = 0; i < intersectPoints->GetNumberOfPoints(); i++ ) { intersectPoints->GetPoint(i, intersection); std::cout << "\tPoint Intersection " << i << ": " << intersection[0] << ", " << intersection[1] << ", " << intersection[2] << std::endl; } std::cout << "NumCells: " << intersectCells->GetNumberOfIds() << std::endl; vtkIdType cellId; for(int i = 0; i < intersectCells->GetNumberOfIds(); i++ ) { cellId = intersectCells->GetId(i); std::cout << "\tCellId " << i << ": " << cellId << std::endl; } // Render the line, sphere and intersected cells vtkSmartPointer<vtkLineSource> lineSource = vtkSmartPointer<vtkLineSource>::New(); lineSource->SetPoint1(lineP0); lineSource->SetPoint2(lineP1); vtkSmartPointer<vtkPolyDataMapper> lineMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); lineMapper->SetInputConnection(lineSource->GetOutputPort()); vtkSmartPointer<vtkActor> lineActor = vtkSmartPointer<vtkActor>::New(); lineActor->SetMapper(lineMapper); vtkSmartPointer<vtkPolyDataMapper> sphereMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); sphereMapper->SetInputConnection(sphereSource->GetOutputPort()); vtkSmartPointer<vtkActor> sphereActor = vtkSmartPointer<vtkActor>::New(); sphereActor->SetMapper(sphereMapper); sphereActor->GetProperty()->SetRepresentationToWireframe(); sphereActor->GetProperty()->SetColor(0.89,0.81,0.34); vtkSmartPointer<vtkExtractCells> cellSource = vtkSmartPointer<vtkExtractCells>::New(); cellSource->SetInputConnection(sphereSource->GetOutputPort()); cellSource->SetCellList(intersectCells); vtkSmartPointer<vtkDataSetMapper> cellMapper = vtkSmartPointer<vtkDataSetMapper>::New(); cellMapper->SetInputConnection(cellSource->GetOutputPort()); vtkSmartPointer<vtkActor> cellActor = vtkSmartPointer<vtkActor>::New(); cellActor->SetMapper(cellMapper); cellActor->GetProperty()->SetColor(1.0, 0.3882, 0.2784); vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); renderer->AddActor(lineActor); renderer->AddActor(sphereActor); renderer->AddActor(cellActor); renderer->SetBackground(.4, .5, .6); renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR) project(ModifiedBSPTreeExtractCells) find_package(VTK COMPONENTS vtkCommonCore vtkCommonDataModel vtkFiltersExtraction vtkFiltersFlowPaths vtkFiltersSources vtkInteractionStyle vtkRenderingCore vtkRenderingFreeType vtkRenderingOpenGL2 QUIET) if (NOT VTK_FOUND) message("Skipping ModifiedBSPTreeExtractCells: ${VTK_NOT_FOUND_MESSAGE}") return () endif() message (STATUS "VTK_VERSION: ${VTK_VERSION}") if (VTK_VERSION VERSION_LESS "8.90.0") # old system include(${VTK_USE_FILE}) add_executable(ModifiedBSPTreeExtractCells MACOSX_BUNDLE ModifiedBSPTreeExtractCells.cxx ) target_link_libraries(ModifiedBSPTreeExtractCells PRIVATE ${VTK_LIBRARIES}) else () # include all components add_executable(ModifiedBSPTreeExtractCells MACOSX_BUNDLE ModifiedBSPTreeExtractCells.cxx ) target_link_libraries(ModifiedBSPTreeExtractCells PRIVATE ${VTK_LIBRARIES}) # vtk_module_autoinit is needed vtk_module_autoinit( TARGETS ModifiedBSPTreeExtractCells MODULES ${VTK_LIBRARIES} ) endif ()
Download and Build ModifiedBSPTreeExtractCells¶
Click here to download ModifiedBSPTreeExtractCells and its CMakeLists.txt file. Once the tarball ModifiedBSPTreeExtractCells.tar has been downloaded and extracted,
cd ModifiedBSPTreeExtractCells/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:
./ModifiedBSPTreeExtractCells
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.