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ClosedSurface

vtk-examples/Cxx/PolyData/ClosedSurface

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Question

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Code

ClosedSurface.cxx

#include <vtkFeatureEdges.h>
#include <vtkNew.h>
#include <vtkSmartPointer.h>
#include <vtkSphereSource.h>

#include <vtkBYUReader.h>
#include <vtkOBJReader.h>
#include <vtkPLYReader.h>
#include <vtkPolyDataReader.h>
#include <vtkSTLReader.h>
#include <vtkSphereSource.h>
#include <vtkXMLPolyDataReader.h>

#include <vtksys/SystemTools.hxx>

namespace {
vtkSmartPointer<vtkPolyData> ReadPolyData(const char* fileName);
}

int main(int argc, char* argv[])
{
  std::string fileName = "vtkSphereSource";
  if (argc > 1)
  {
    fileName = argv[1];
  }

  vtkSmartPointer<vtkPolyData> polyData = ReadPolyData(fileName.c_str());

  vtkNew<vtkFeatureEdges> featureEdges;
  featureEdges->FeatureEdgesOff();
  featureEdges->BoundaryEdgesOn();
  featureEdges->NonManifoldEdgesOn();
  featureEdges->ManifoldEdgesOff();
  featureEdges->SetInputData(polyData);
  featureEdges->Update();

  int numberOfOpenEdges = featureEdges->GetOutput()->GetNumberOfCells();

  if (numberOfOpenEdges > 0)
  {
    std::cout << fileName << ": Surface is not closed" << std::endl;
  }
  else
  {
    std::cout << fileName << ": Surface is closed" << std::endl;
  }

  return EXIT_SUCCESS;
}

namespace {
vtkSmartPointer<vtkPolyData> ReadPolyData(const char* fileName)
{
  vtkSmartPointer<vtkPolyData> polyData;
  std::string extension =
      vtksys::SystemTools::GetFilenameLastExtension(std::string(fileName));
  if (extension == ".ply")
  {
    vtkNew<vtkPLYReader> reader;
    reader->SetFileName(fileName);
    reader->Update();
    polyData = reader->GetOutput();
  }
  else if (extension == ".vtp")
  {
    vtkNew<vtkXMLPolyDataReader> reader;
    reader->SetFileName(fileName);
    reader->Update();
    polyData = reader->GetOutput();
  }
  else if (extension == ".obj")
  {
    vtkNew<vtkOBJReader> reader;
    reader->SetFileName(fileName);
    reader->Update();
    polyData = reader->GetOutput();
  }
  else if (extension == ".stl")
  {
    vtkNew<vtkSTLReader> reader;
    reader->SetFileName(fileName);
    reader->Update();
    polyData = reader->GetOutput();
  }
  else if (extension == ".vtk")
  {
    vtkNew<vtkPolyDataReader> reader;
    reader->SetFileName(fileName);
    reader->Update();
    polyData = reader->GetOutput();
  }
  else if (extension == ".g")
  {
    vtkNew<vtkBYUReader> reader;
    reader->SetGeometryFileName(fileName);
    reader->Update();
    polyData = reader->GetOutput();
  }
  else
  {
    vtkNew<vtkSphereSource> source;
    source->Update();
    polyData = source->GetOutput();
  }
  return polyData;
}
} // namespace

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(ClosedSurface)

find_package(VTK COMPONENTS 
  vtkCommonCore
  vtkFiltersCore
  vtkFiltersSources
  vtkIOGeometry
  vtkIOLegacy
  vtkIOPLY
  vtkIOXML
  QUIET
)

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

Download and Build ClosedSurface

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

cd ClosedSurface/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:

./ClosedSurface

WINDOWS USERS

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