# MatrixTranspose

VTKExamples/Cxx/Math/MatrixTranspose

Other Languages

See (Java)

### Code

MatrixTranspose.cxx

    #include <vtkSmartPointer.h>
    #include <vtkMatrix3x3.h>

    int main(int, char *[])
    {
      vtkSmartPointer<vtkMatrix3x3> m =
        vtkSmartPointer<vtkMatrix3x3>::New();

      m->SetElement(2,1,2.0); // Set element (2,1) to 2.0

      std::cout << *m << std::endl;

      m->Transpose();

      std::cout << *m << std::endl;

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

    project(MatrixTranspose)

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

### Download and Build MatrixTranspose

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

    cd MatrixTranspose/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:

    ./MatrixTranspose

WINDOWS USERS

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