ArrayWriter

#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;
}

cmake_minimum_required(VERSION 3.12 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()
  # 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(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()

cd ArrayWriter/build

cmake ..

cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

make

./ArrayWriter