VTK/Examples/Cxx/Visualization/CornerAnnotation

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VTK Examples Baseline Visualization TestCornerAnnotation.png

CornerAnnotation.cxx

#include <vtkSmartPointer.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkTextProperty.h>
#include <vtkSphereSource.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkCornerAnnotation.h>

int main( int, char *[] )
{
  vtkSmartPointer<vtkSphereSource> sphereSource = 
      vtkSmartPointer<vtkSphereSource>::New();
  sphereSource->Update();
  
  vtkSmartPointer<vtkPolyDataMapper> mapper = 
      vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper->SetInputConnection( sphereSource->GetOutputPort() );
 
  vtkSmartPointer<vtkActor> actor = 
      vtkSmartPointer<vtkActor>::New();
  actor->SetMapper( mapper );
  
  // Visualize
  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( actor );
  
   // Annotate the image with window/level and mouse over pixel information
  vtkSmartPointer<vtkCornerAnnotation> cornerAnnotation = 
      vtkSmartPointer<vtkCornerAnnotation>::New();
  cornerAnnotation->SetLinearFontScaleFactor( 2 );
  cornerAnnotation->SetNonlinearFontScaleFactor( 1 );
  cornerAnnotation->SetMaximumFontSize( 20 );
  cornerAnnotation->SetText( 0, "lower left" );
  cornerAnnotation->SetText( 1, "lower right" );
  cornerAnnotation->SetText( 2, "upper left" );
  cornerAnnotation->SetText( 3, "upper right" );
  cornerAnnotation->GetTextProperty()->SetColor( 1, 0, 0 );

  renderer->AddViewProp( cornerAnnotation );
  
  renderWindow->Render();
  renderWindowInteractor->Start();
  
  return EXIT_SUCCESS;
}

Please try the new VTKExamples website.

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(CornerAnnotation)

find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

add_executable(CornerAnnotation MACOSX_BUNDLE CornerAnnotation.cxx)

if(VTK_LIBRARIES)
  target_link_libraries(CornerAnnotation ${VTK_LIBRARIES})
else()
  target_link_libraries(CornerAnnotation vtkHybrid vtkWidgets)
endif()

Download and Build CornerAnnotation

Click here to download CornerAnnotation. and its CMakeLists.txt file.

Once the tarball CornerAnnotation.tar has been downloaded and extracted,

cd CornerAnnotation/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:

./CornerAnnotation

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.