Carna provides classes for simple and fast visualization of CT data.

The Carna Registration API is meant as an unified layer between Carna and LocalizerDLL. It makes registering tools and virtual scene elements as simple as possible.

Go to: Library Documentation

• Dependencies
• Build instructions
  • Creating Visual Studio project files
  • Building directly
  • Installation notes
  • The MediTEC-way
• Including in your project
  • The CMake-way
  • The MediTEC-way
  • Manually

• Qt ≥ 4.8
• GLEW ≥ 1.7
• Carna ≥ 2.3
• TRTK ≥ 0.13.1
• Eigen ≥ 3.0.5
• LocalizerDLL ≥ 0.1.0
• MathBib ≥ 0.1.0
• CameraCalibration ≥ 0.1.0
• OpenGL 2.1

The default build process requires CMake = 3.0.2.

This section explains three ways of building CRA:

1. Creating Visual Studio project files and building it from the IDE
2. Building CRA directly through CMake from command line
3. If you are a colleague from MediTEC, you can use the batch script.

Regardless which build method you pick, first thing you need to do is to fetch the latest stable version. If you are using git from command line, you can simply run following command from within the directory where you want to download the sources:

git clone https://github.com/RWTHmediTEC/CRA.git

After a few seconds there should be a new folder named CRA at your current working directory.

First create the directory where the Visual Studio files should go to:

cd CRA

mkdir build
mkdir build\VisualStudio2010

cd build\VisualStudio2010

Then initialize the Visual Studio environment:

call "%VS100COMNTOOLS%\vsvars32.bat"

And finnaly invoke CMake like this:

cmake -G"Visual Studio 10" -DCMAKE_INSTALL_PREFIX="C:\Libs" ..\..

You may also leave out the -DCMAKE_INSTALL_PREFIX parameter if you do not want to specify any particular installation directory. In this case the default installation directory will be set, which is the value of the environmental variable %ProgramFiles% on Windows.

At this point the Visual Studio project files are ready. You can proceed by opening the solution file CRA.sln that was created in CRA\build\VisualStudio2010. Note that building the INSTALL project from the solution actually triggers the installation routine to the destination you configured via -DCMAKE_INSTALL_PREFIX.

The first step is to create the directories where the results of the building process will be stored. You can use any names you like for the directories, it's only important to distinguish between "debug" and "release" files:

cd CRA

mkdir build
mkdir build\debug
mkdir build\release

Then initialize the building enviroment. Use the command below if you are going to use Visual Studio for compilation:

call "%VS100COMNTOOLS%\vsvars32.bat"

Now it's time to run the build process. Lets build the "debug" version first:

cd build\debug
cmake -G"NMake Makefiles" -DCMAKE_INSTALL_PREFIX="C:\Libs" -DBUILD_DOC=OFF ..\..
nmake

You may also leave out the -DCMAKE_INSTALL_PREFIX parameter if you do not want to specify any particular installation directory. In this case the default installation directory will be set, which is the value of the environmental variable %ProgramFiles% on Windows.

The parameter -DBUILD_DOC=OFF forces CMake to skip running Doxygen, if it is installed at all. The idea is to build the documentation only once. Since we are going to build the "release" version next, leaving out this parameter at this point would lead to Doxygen being triggered twice.

Run nmake install now if you wish to install the "debug" version on your system.

If everything went well, run the build for the "release" version:

cd ..\nmake_release
cmake -G"NMake Makefiles" -DCMAKE_BUILD_TYPE=Release ..\..
nmake

Run nmake install (again) if you want to install the "release" version.

You may need finer control of the installation routines' destinations. Regardless which of the methods presented above you choose, you can specify the destinations for the headers, the library and the generated CMake files by passing particular parameters to cmake:

• INSTALL_CMAKE_DIR specifies where the FindCRA.cmake file goes to.
• INSTALL_LIBRARY_DIR specifies where the built binary files go to.
• INSTALL_HEADERS_DIR specifies where the headers are going to installed to.

If you use relative paths for these parameters, they will be resolved relatively to CMAKE_INSTALL_PREFIX. Consider using absolute paths if you don't want that.

Make sure you have the environmental variable %MEDITEC_LIBS% set and it is poiting to an existing directory that you have permissions to write to, than

• run create_msvc10_project.bat to create the Visual Studio project files, or
• run win32_msvc10_build.bat to build and install the whole package.

It is assumed at this point that you either have built and installed CRA with CMake, or you have fetched the binaries and the corresponding headers from somewhere.

Add a find_package directive to your project's CMakeLists.txt file, e.g.:

find_package( CRA REQUIRED )
include_directories( ${CRA_INCLUDE_DIR} )

If you need to put a constraint on the version, use find_package(CRA 0.1.0 REQUIRED) to pick a package with a version compatible to 0.1.0, or use find_package(CRA 0.1.0 EXACT REQUIRED) to pick a package by the exact version.

You also need to add the headers (usually only the headers) from TRTK and Eigen:

# Eigen
find_package( Eigen3 3.0.5 REQUIRED )
include_directories( ${EIGEN3_INCLUDE_DIR} )

# TRTK
find_package( TRTK 0.13.1 REQUIRED )
include_directories( ${TRTK_INCLUDE_DIR} )

Finally add CRA to the linking stage:

target_link_libraries( ${TARGET_NAME} ${SOME_OTHER_LIBRARIES} ${CRA_LIBRARIES} )

This method relies on CMake being able to locate the proper FindCRA.cmake file. If you've built CRA from source, than you have determined it's location either through CMAKE_INSTALL_PREFIX or INSTALL_CMAKE_DIR as described in "installation notes". You can specify the paths CMake searches for FindCRA.cmake by adjustung the CMAKE_MODULE_PATH variable, e.g.:

list( APPEND CMAKE_MODULE_PATH "C:/CMake/Modules" )

If you are a colleague from MediTEC, you must also add the following line of code before find_package, otherwise CMake will not find CRA:

list(APPEND CMAKE_MODULE_PATH "${MEDITEC_LIBS}/CRA/0.1")

Find where your header files are located. You might look for Registration.h, that is contained by a directory named Carna. Add the parent directory of the Carna directory, that contains Registration.h in turn, to your project's include directories.

Then find the appropriate library file. It's name depends on your platform and CRA version, e.g. CRA-0.1.0.lib for the release and CRA-0.1.0d.lib for the debug version respectively of Carna 0.1.0 on Windows. Add both of these files to your project's linker stage.