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ArrayWriter

vtk-examples/Cxx/Utilities/ArrayWriter

Question

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Code

ArrayWriter.cxx

#include <vtkArrayData.h>
#include <vtkArrayWriter.h>
#include <vtkDenseArray.h>
#include <vtkNew.h>

int main(int, char*[])
{
  vtkNew<vtkDenseArray<double>> array;
  array->Resize(1, 3);
  array->SetValue(0, 0, 1.0);
  array->SetValue(0, 1, 2.0);
  array->SetValue(0, 2, 3.0);
  {
    // Method 1
    vtkNew<vtkArrayWriter> writer;
    vtkNew<vtkArrayData> arrayData;
    arrayData->AddArray(array);
    writer->SetInputData(arrayData);
    vtkStdString file1 = "Test1.txt";
    writer->Write(file1);
  }
  {
    vtkStdString file2 = "Test2.txt";
    // Method 2
    vtkNew<vtkArrayWriter> writer;
    writer->Write(array, file2);
  }

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(ArrayWriter)

find_package(VTK COMPONENTS 
  vtkCommonCore
  vtkCommonDataModel
  vtkIOCore
  QUIET
)

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

Download and Build ArrayWriter

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

cd ArrayWriter/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:

./ArrayWriter

WINDOWS USERS

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