GenericDataObjectReader

VTKExamples/Cxx/IO/GenericDataObjectReader

Code

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;
}

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 )

target_link_libraries(GenericDataObjectReader ${VTK_LIBRARIES})

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

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