VTK/Examples/Cxx/Widgets/DistanceWidget

• Contributed by Arnaud Gelas

Click two points to see the distance between them.

DistanceWidget.cxx

#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSmartPointer.h>
#include <vtkDistanceWidget.h>
#include <vtkDistanceRepresentation.h>

int main(int, char *[])
{
  // A renderer and render window
  vtkSmartPointer<vtkRenderer> renderer =
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow =
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);

  // An interactor
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);

  vtkSmartPointer<vtkDistanceWidget> distanceWidget =
    vtkSmartPointer<vtkDistanceWidget>::New();
  distanceWidget->SetInteractor(renderWindowInteractor);
  distanceWidget->CreateDefaultRepresentation();
  static_cast<vtkDistanceRepresentation *>(distanceWidget->GetRepresentation())
    ->SetLabelFormat("%-#6.3g mm");
  
  // Render an image (lights and cameras are created automatically)
  renderWindow->Render();
  
  renderWindowInteractor->Initialize();
  renderWindow->Render();
  distanceWidget->On();
  
  // Begin mouse interaction
  renderWindowInteractor->Start();
  
  return EXIT_SUCCESS;
}

Please try the new VTKExamples website.

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(DistanceWidget)

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

add_executable(DistanceWidget MACOSX_BUNDLE DistanceWidget.cxx)

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

Download and Build DistanceWidget

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

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

cd DistanceWidget/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:

./DistanceWidget

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.

Comments

Image is blank/black because nothing is displayed until you click the mouse twice (indicate two points)