VTK/Examples/Cxx/IO/GenericDataObjectReader

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GenericDataObjectReader.cxx

#include <vtkGenericDataObjectReader.h>
#include <vtkStructuredGrid.h>
#include <vtkSmartPointer.h>
#include <vtkPolyData.h>
#include <string>

int main ( int argc, char *argv[] )
{
  // Ensure a filename was specified
  if(argc != 2)
    {
    std::cerr << "Usage: " << argv[0] << " InputFilename" << endl;
    return EXIT_FAILURE;
    }

  // Get the filename from the command line
  std::string inputFilename = argv[1];

  // Get all data from the file
  vtkSmartPointer<vtkGenericDataObjectReader> reader = 
      vtkSmartPointer<vtkGenericDataObjectReader>::New();
  reader->SetFileName(inputFilename.c_str());
  reader->Update();
  
  // All of the standard data types can be checked and obtained like this:
  if(reader->IsFilePolyData())
    {
    std::cout << "output is a polydata" << std::endl;
    vtkPolyData* output = reader->GetPolyDataOutput();
    std::cout << "output has " << output->GetNumberOfPoints() << " points." << std::endl;
    }
  
  return EXIT_SUCCESS;
}

Please try the new VTKExamples website.

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(GenericDataObjectReader)

find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

add_executable(GenericDataObjectReader MACOSX_BUNDLE GenericDataObjectReader.cxx)

if(VTK_LIBRARIES)
  target_link_libraries(GenericDataObjectReader ${VTK_LIBRARIES})
else()
  target_link_libraries(GenericDataObjectReader vtkHybrid vtkWidgets)
endif()

Download and Build GenericDataObjectReader

Click here to download GenericDataObjectReader. and its CMakeLists.txt file.

Once the tarball GenericDataObjectReader.tar has been downloaded and extracted,

cd GenericDataObjectReader/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:

./GenericDataObjectReader

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