DijkstraGraphGeodesicPath

VTKExamples/Cxx/PolyData/DijkstraGraphGeodesicPath


Other Languages

See (CSharp)

Code

DijkstraGraphGeodesicPath.cxx

#include <vtkSphereSource.h>
#include <vtkProperty.h>
#include <vtkPolyData.h>
#include <vtkSmartPointer.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkDijkstraGraphGeodesicPath.h>

int main(int , char *[])
{ 
  // Create a sphere
  vtkSmartPointer<vtkSphereSource> sphereSource = 
    vtkSmartPointer<vtkSphereSource>::New();
  sphereSource->Update();

  vtkSmartPointer<vtkDijkstraGraphGeodesicPath> dijkstra = 
    vtkSmartPointer<vtkDijkstraGraphGeodesicPath>::New();
  dijkstra->SetInputConnection(sphereSource->GetOutputPort());
  dijkstra->SetStartVertex(0);
  dijkstra->SetEndVertex(10);
  dijkstra->Update();

  // Create a mapper and actor
  vtkSmartPointer<vtkPolyDataMapper> pathMapper = 
    vtkSmartPointer<vtkPolyDataMapper>::New();
  pathMapper->SetInputConnection(dijkstra->GetOutputPort());

  vtkSmartPointer<vtkActor> pathActor = 
    vtkSmartPointer<vtkActor>::New();
  pathActor->SetMapper(pathMapper);
  pathActor->GetProperty()->SetColor(1,0,0); // Red
  pathActor->GetProperty()->SetLineWidth(4);

  // Create a mapper and actor
  vtkSmartPointer<vtkPolyDataMapper> mapper = 
    vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper->SetInputConnection(sphereSource->GetOutputPort());

  vtkSmartPointer<vtkActor> actor = 
    vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);

  //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(actor);
  renderer->AddActor(pathActor);
  renderer->SetBackground(.3, .6, .3); // Background color green

  //Render and interact
  renderWindow->Render();
  renderWindowInteractor->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(DijkstraGraphGeodesicPath)

find_package(VTK COMPONENTS 
  vtkCommonCore
  vtkCommonDataModel
  vtkFiltersModeling
  vtkFiltersSources
  vtkInteractionStyle
  vtkRenderingCore
  vtkRenderingFreeType
  vtkRenderingOpenGL2 QUIET)
if (NOT VTK_FOUND)
  message("Skipping DijkstraGraphGeodesicPath: ${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(DijkstraGraphGeodesicPath MACOSX_BUNDLE DijkstraGraphGeodesicPath.cxx )
  target_link_libraries(DijkstraGraphGeodesicPath PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(DijkstraGraphGeodesicPath MACOSX_BUNDLE DijkstraGraphGeodesicPath.cxx )
  target_link_libraries(DijkstraGraphGeodesicPath PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS DijkstraGraphGeodesicPath
    MODULES ${VTK_LIBRARIES}
    )
endif () 

Download and Build DijkstraGraphGeodesicPath

Click here to download DijkstraGraphGeodesicPath and its CMakeLists.txt file. Once the tarball DijkstraGraphGeodesicPath.tar has been downloaded and extracted,

cd DijkstraGraphGeodesicPath/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:

./DijkstraGraphGeodesicPath

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.