LabeledDataMapper
VTKExamples/Cxx/Visualization/LabeledDataMapper
Description¶
This example demonstrates how to display the point ID at each point.
Code¶
LabeledDataMapper.cxx
#include <vtkSmartPointer.h> #include <vtkPointSource.h> #include <vtkPolyData.h> #include <vtkPolyDataMapper.h> #include <vtkLabeledDataMapper.h> #include <vtkProperty.h> #include <vtkActor.h> #include <vtkActor2D.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> int main(int, char *[]) { // Create a point set vtkSmartPointer<vtkPointSource> pointSource = vtkSmartPointer<vtkPointSource>::New(); pointSource->SetNumberOfPoints(10); pointSource->Update(); // Create a mapper and actor vtkSmartPointer<vtkPolyDataMapper> pointMapper = vtkSmartPointer<vtkPolyDataMapper>::New(); pointMapper->SetInputConnection(pointSource->GetOutputPort()); vtkSmartPointer<vtkActor> pointActor = vtkSmartPointer<vtkActor>::New(); pointActor->SetMapper(pointMapper); pointActor->GetProperty()->SetPointSize(10); pointActor->GetProperty()->SetColor(1, 1, .4); vtkSmartPointer<vtkLabeledDataMapper> labelMapper = vtkSmartPointer<vtkLabeledDataMapper>::New(); labelMapper->SetInputConnection(pointSource->GetOutputPort()); vtkSmartPointer<vtkActor2D> labelActor = vtkSmartPointer<vtkActor2D>::New(); labelActor->SetMapper(labelMapper); // Create a renderer, render window, and interactor vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); // Add the actor to the scene renderer->AddActor(pointActor); renderer->AddActor(labelActor); renderer->SetBackground(.1, .3, .2); // Background color green // Render and interact renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(LabeledDataMapper) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(LabeledDataMapper MACOSX_BUNDLE LabeledDataMapper.cxx) target_link_libraries(LabeledDataMapper ${VTK_LIBRARIES})
Download and Build LabeledDataMapper¶
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Click here to download LabeledDataMapper and its CMakeLists.txt file. Once the tarball LabeledDataMapper.tar has been downloaded and extracted,
cd LabeledDataMapper/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:
./LabeledDataMapper
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.