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
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.