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EarthSource

vtk-examples/Cxx/GeometricObjects/EarthSource


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See (Python)

Question

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Code

EarthSource.cxx

#include <vtkActor.h>
#include <vtkEarthSource.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPNGWriter.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkSphereSource.h>
#include <vtkWindowToImageFilter.h>

int main(int, char*[])
{

  vtkNew<vtkNamedColors> colors;

  // Earth source
  vtkNew<vtkEarthSource> earthSource;
  earthSource->OutlineOn();
  earthSource->Update();

  // Create a sphere
  vtkNew<vtkSphereSource> sphere;
  sphere->SetThetaResolution(100);
  sphere->SetPhiResolution(100);
  sphere->SetRadius(earthSource->GetRadius());

  // Create a mapper and actor
  vtkNew<vtkPolyDataMapper> mapper;
  mapper->SetInputConnection(earthSource->GetOutputPort());

  vtkNew<vtkActor> actor;
  actor->SetMapper(mapper);
  actor->GetProperty()->SetColor(colors->GetColor3d("Black").GetData());

  vtkNew<vtkPolyDataMapper> sphereMapper;
  sphereMapper->SetInputConnection(sphere->GetOutputPort());

  vtkNew<vtkActor> sphereActor;
  sphereActor->SetMapper(sphereMapper);
  sphereActor->GetProperty()->SetColor(
      colors->GetColor3d("PeachPuff").GetData());

  // Create a renderer, render window, and interactor
  vtkNew<vtkRenderer> renderer;
  vtkNew<vtkRenderWindow> renderWindow;
  renderWindow->AddRenderer(renderer);
  vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
  renderWindowInteractor->SetRenderWindow(renderWindow);

  // Add the actor to the scene
  renderer->AddActor(actor);
  renderer->AddActor(sphereActor);
  renderer->SetBackground(colors->GetColor3d("Black").GetData());

  renderWindow->SetSize(640, 480);
  renderWindow->SetWindowName("EarthSource");

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

  /*
  // screenshot code:
  vtkNew<vtkWindowToImageFilter> w2if ;
  w2if->SetInput(renderWindow);
  w2if->Update();

  vtkNew<vtkPNGWriter> writer;
  writer->SetFileName("TestEarthSource->png");
  writer->SetInputConnection(w2if->GetOutputPort());
  writer->Write();
  */

  // begin interaction
  renderWindowInteractor->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(EarthSource)

find_package(VTK COMPONENTS 
  vtkCommonColor
  vtkCommonCore
  vtkCommonDataModel
  vtkFiltersHybrid
  vtkFiltersSources
  vtkIOImage
  vtkInteractionStyle
  vtkRenderingContextOpenGL2
  vtkRenderingCore
  vtkRenderingFreeType
  vtkRenderingGL2PSOpenGL2
  vtkRenderingOpenGL2
  QUIET
)

if (NOT VTK_FOUND)
  message("Skipping EarthSource: ${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(EarthSource MACOSX_BUNDLE EarthSource.cxx )
  target_link_libraries(EarthSource PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(EarthSource MACOSX_BUNDLE EarthSource.cxx )
  target_link_libraries(EarthSource PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS EarthSource
    MODULES ${VTK_LIBRARIES}
    )
endif ()

Download and Build EarthSource

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

cd EarthSource/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:

./EarthSource

WINDOWS USERS

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