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SparseArray

vtk-examples/Cxx/Utilities/SparseArray

Question

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Code

SparseArray.cxx

#include <vtkNew.h>
#include <vtkSparseArray.h>

int main(int, char*[])
{
  vtkNew<vtkSparseArray<double>> array;
  array->Resize(5, 1);
  array->SetNullValue(-1);

  for (unsigned int i = 0; i < 5; i++)
  {
    array->SetValue(i, 0, i);
  }

  for (unsigned int i = 0; i < 6; i++)
  {
    double val = array->GetValue(i, 0);
    std::cout << val << std::endl;
  }

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.12 FATAL_ERROR)

project(SparseArray)

find_package(VTK COMPONENTS 
  vtkCommonCore
  QUIET
)

if (NOT VTK_FOUND)
  message("Skipping SparseArray: ${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(SparseArray MACOSX_BUNDLE SparseArray.cxx )
  target_link_libraries(SparseArray 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(SparseArray MACOSX_BUNDLE SparseArray.cxx )
  target_link_libraries(SparseArray PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS SparseArray
    MODULES ${VTK_LIBRARIES}
    )
endif()

Download and Build SparseArray

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

cd SparseArray/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:

./SparseArray

WINDOWS USERS

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