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SortDataArray

vtk-examples/Cxx/Utilities/SortDataArray

Question

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Code

SortDataArray.cxx

#include <vtkDoubleArray.h>
#include <vtkIntArray.h>
#include <vtkNew.h>
#include <vtkSortDataArray.h>

int main(int, char*[])
{

  vtkNew<vtkDoubleArray> valueArray;
  valueArray->InsertNextValue(20.0);
  valueArray->InsertNextValue(10.0);
  valueArray->InsertNextValue(30.0);

  vtkNew<vtkIntArray> keyArray;
  keyArray->InsertNextValue(1);
  keyArray->InsertNextValue(0);
  keyArray->InsertNextValue(2);

  std::cout << "Unsorted: " << valueArray->GetValue(0) << " "
            << valueArray->GetValue(1) << " " << valueArray->GetValue(2)
            << std::endl;

  // Sort the array
  vtkNew<vtkSortDataArray> sortDataArray;
  sortDataArray->Sort(keyArray, valueArray);

  std::cout << "Sorted: " << valueArray->GetValue(0) << " "
            << valueArray->GetValue(1) << " " << valueArray->GetValue(2)
            << std::endl;

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(SortDataArray)

find_package(VTK COMPONENTS 
  vtkCommonCore
  QUIET
)

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

Download and Build SortDataArray

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

cd SortDataArray/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:

./SortDataArray

WINDOWS USERS

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