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# Vector

VTKEx/Cxx/Utilities/Vector

Question

If you have a simple question about this example contact us at VTKExProject If your question is more complex and may require extended discussion, please use the VTK Discourse Forum

### Code

Vector.cxx

    #include <vtkSmartPointer.h>
    #include <vtkVector.h>

    #include <iostream>

    int main(int, char *[])
    {
      vtkVector3d v(1.0, 2.0, 3.0);
      std::cout << v.GetX() << " " << v.GetY() << " " << v.GetZ() << std::endl;

      double* vals = v.GetData();

      std::cout << vals[0] << " " << vals[1] << " " << vals[2] << std::endl;

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

    project(Vector)

    find_package(VTK COMPONENTS
      vtkCommonCore
      vtkCommonDataModel QUIET)
    if (NOT VTK_FOUND)
      message("Skipping Vector: ${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(Vector MACOSX_BUNDLE Vector.cxx )
      target_link_libraries(Vector PRIVATE ${VTK_LIBRARIES})
    else ()
      # include all components
      add_executable(Vector MACOSX_BUNDLE Vector.cxx )
      target_link_libraries(Vector PRIVATE ${VTK_LIBRARIES})
      # vtk_module_autoinit is needed
      vtk_module_autoinit(
        TARGETS Vector
        MODULES ${VTK_LIBRARIES}
        )
    endif ()

### Download and Build Vector

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

    cd Vector/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:

    ./Vector

WINDOWS USERS

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