Point
VTKExamples/Cxx/GeometricObjects/Point
Code¶
Point.cxx
#include <vtkActor.h> #include <vtkCellArray.h> #include <vtkNamedColors.h> #include <vtkPoints.h> #include <vtkPolyData.h> #include <vtkPolyDataMapper.h> #include <vtkProperty.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkSmartPointer.h> int main(int, char *[]) { vtkSmartPointer<vtkNamedColors> colors = vtkSmartPointer<vtkNamedColors>::New(); // Create the geometry of a point (the coordinate) vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New(); const float p[3] = {1.0, 2.0, 3.0}; // Create the topology of the point (a vertex) vtkSmartPointer<vtkCellArray> vertices = vtkSmartPointer<vtkCellArray>::New(); // We need an an array of point id's for InsertNextCell. vtkIdType pid[1]; pid[0] = points->InsertNextPoint(p); vertices->InsertNextCell(1,pid); // Create a polydata object vtkSmartPointer<vtkPolyData> point = vtkSmartPointer<vtkPolyData>::New(); // Set the points and vertices we created as the geometry and topology of the polydata point->SetPoints(points); point->SetVerts(vertices); // Visualize vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper->SetInputData(point); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); actor->GetProperty()->SetColor(colors->GetColor3d("Tomato").GetData()); actor->GetProperty()->SetPointSize(20); vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->SetWindowName("Point"); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); renderer->AddActor(actor); renderer->SetBackground(colors->GetColor3d("DarkOliveGreen").GetData()); renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR) project(Point) find_package(VTK COMPONENTS vtkCommonColor vtkCommonCore vtkCommonDataModel vtkInteractionStyle vtkRenderingCore vtkRenderingFreeType vtkRenderingOpenGL2 QUIET) if (NOT VTK_FOUND) message("Skipping Point: ${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(Point MACOSX_BUNDLE Point.cxx ) target_link_libraries(Point PRIVATE ${VTK_LIBRARIES}) else () # include all components add_executable(Point MACOSX_BUNDLE Point.cxx ) target_link_libraries(Point PRIVATE ${VTK_LIBRARIES}) # vtk_module_autoinit is needed vtk_module_autoinit( TARGETS Point MODULES ${VTK_LIBRARIES} ) endif ()
Download and Build Point¶
Click here to download Point and its CMakeLists.txt file. Once the tarball Point.tar has been downloaded and extracted,
cd Point/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:
./Point
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.