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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 3.12 FATAL_ERROR)

project(PassThrough)

find_package(VTK COMPONENTS 
  CommonCore
  CommonDataModel
  FiltersCore
  FiltersSources
  QUIET
)

if (NOT VTK_FOUND)
  message(FATAL_ERROR "PassThrough: Unable to find the VTK build folder.")
endif()

# Prevent a "command line is too long" failure in Windows.
set(CMAKE_NINJA_FORCE_RESPONSE_FILE "ON" CACHE BOOL "Force Ninja to use response files.")
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}
)

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.