# PerpendicularVector

VTKExamples/Cxx/Math/PerpendicularVector

### Code

PerpendicularVector.cxx

    #include <vtkSmartPointer.h>
    #include <vtkMath.h>

    int main(int, char *[])
    {
      double x[3] = {1,0,0};
      double y[3];
      vtkMath::Perpendiculars(x, y, NULL, 0);

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

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(PerpendicularVector)

    find_package(VTK REQUIRED)
    include(${VTK_USE_FILE})

    add_executable(PerpendicularVector MACOSX_BUNDLE PerpendicularVector.cxx )

    target_link_libraries(PerpendicularVector ${VTK_LIBRARIES})

### Download and Build PerpendicularVector

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

    cd PerpendicularVector/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:

    ./PerpendicularVector

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