# TryDowncast

VTKExamples/Cxx/Utilities/WishList/TryDowncast

### Code

TryDowncast.cxx

    #include <vtkSmartPointer.h>
    #include <vtkTryDowncast.h>

    int main(int, char *[])
    {
      // Demonstrate a check of a cast
      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(TryDowncast)

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

    add_executable(TryDowncast MACOSX_BUNDLE TryDowncast.cxx)

    target_link_libraries(TryDowncast ${VTK_LIBRARIES})

### Download and Build TryDowncast

Danger

The generation of tar files has not been ported to the new VTKExamples. Some tarballs may be missing or out-of-date.

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

    cd TryDowncast/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:

    ./TryDowncast

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.