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PassThrough

vtk-examples/Cxx/InfoVis/PassThrough

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See (Java)

Question

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Code

PassThrough.cxx

#include <vtkNew.h>
#include <vtkPassThrough.h>
#include <vtkPolyData.h>
#include <vtkSphereSource.h>

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

  std::cout << "Points before: "
            << sphereSource->GetOutput()->GetNumberOfPoints() << std::endl;

  vtkNew<vtkPassThrough> passThrough;
  passThrough->SetInputConnection(sphereSource->GetOutputPort());
  passThrough->Update();

  auto output = dynamic_cast<vtkPolyData*>(passThrough->GetOutput());

  std::cout << "Points after: " << output->GetNumberOfPoints() << std::endl;

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(PassThrough)

find_package(VTK COMPONENTS 
  vtkCommonCore
  vtkCommonDataModel
  vtkFiltersCore
  vtkFiltersSources
  QUIET
)

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

Download and Build PassThrough

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

cd PassThrough/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:

./PassThrough

WINDOWS USERS

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