- Generated on Sun Jan 19 2025 01:00:23 for NiHu by
1.8.18
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NiHu
2.0
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The source code of NiHu can be downloaded using the version control software git. You can obtain the latest stable version of the software by typing the command
git clone -b release_2.0 git://last.hit.bme.hu/toolbox/nihu.git
into the command line. There is a nightly build available for NiHu, which contains regular updates, however testing of the most recent features may not be complete. You can download the nightly version similarly by the command
git clone -b nightly git://last.hit.bme.hu/toolbox/nihu.git
The command will create the directory nihu containing all the source files required for further steps. The directory containing the source files is referred to as source directory in the following. Inside the source directory, the folder src contains the C++ and Matlab source codes, whereas other folders contain the documentation and tools required for building the project.
Alternatively, you can download the source code as a packed archive.
To use NiHu's automated, platform independent build system is based on the cross-platform tool CMake.
On Linux, you can install CMake using tha pacakage manager, e.g.
sudo apt install cmake
On Windows, you can download the CMake installers.
CMake version is 3.15.To complie NiHu, the following prerequisites are needed:
NiHu builds were tested using the Gnu compiler collection, the clang compiler, and Microsoft Visual Studio.Eigen 3.3.7.The evaluation of some advanced mathematical functions is based on the portable C++ library collection Boost.
On Linux, you can install Boost using the package manager, e.g.
sudo apt install libbboost-all-dev
On Windows, you can install Boost binaries using the Boost binary downloads, or you can build and install Boost manually.
Boost version is 1.67.0.Fast Fourier transforms are evaluated using the C subroutine library FFTW3.
On Linux, it is recommended that you install the FFTW3 package using the package manager, e.g.
sudo apt install fftw3
On Windows systems, if you do not have FFTW3 installed, the installation process will download FFTW automatically and create the necessary libraries for linking NiHu executables.
FFTW 3.3.5. PATH environment variable for easier usage of the libraries.NiHu's test codes rely on Googletest. The source files of gtest are automatically downloaded during the installation procedure.
gtest 1.7.0.NiHu's documentation is generated using Doxygen.
On Linux, you can install doxygen using the package manager, e.g.
sudo apt install doxygen
To use NiHu's Matlab interface and compile mex files the following prerequisites are also needed:
It is worth mentioning that since NiHu is a template library, you do not need to compile any sources to use NiHu's C++ core. You can simply include the header files found in the directory nihu/src in order to compile your own C++ codes using the features implemented in NiHu (see below). However, the installation process lets you to compile NiHu's libraries, tutorials, tests and mex files for NiHu's Matlab interface. Furthermore, if you complete the installation, you can make sure that you have all necessary prerequisites that are needed to use NiHu. Therefore, it is highly recommended to complete the installation before using the NiHu toolbox.
The installation is done in three steps as usual.
In the following examples the build and installation directories will be located at nihu/build_dir and nihu/install_dir, respectively. The steps of the installation of the prerequisites and the compilation of the source code are discussed for Unix, Windows with MinGW, and Windows with Visual Studio configurations in the sequel. Alternatively, Qt creator can also be used for importing the NiHu project.
For an advanced configuration, you can specify various options for the cmake command from the command line. See installation options for further details. Note that depending on your operating system and software configuration providing some command line options may be mandatory for a successful install.
This section presents how to install the prerequisites and compile NiHu from source code on Unix systems.
Since NiHu requires a compiler that supports some features of the C++14 standard, you must ensure that you have such compiler on your system. It is advised that you use the GNU Compiler Collection, which supports the required features from version 6.1.
You can install the required build tools using the package manager, e.g.
sudo apt install build-essentials
Make sure that the installed compiler version is at least 6.1
gcc --version g++ --version
Alternatively, or if you do not have administrative rights, you can install gcc from source.
The configuration step is performed by calling the command cmake inside the build directory. The command takes one command line argument, with the path to the directory of the C++ source files, which is nihu/src in our case. The installation directory is defined by the option -DNIHU_INSTALL_DIR="/path/to/install/dir". The configuration is performed using the following commands.
cd nihu mkdir build_dir cd build_dir cmake ../src -DNIHU_INSTALL_DIR="../install_dir"
All sources are compiled by calling the make command in the build directory.
make
If you have doxygen installed, you can also compile the documentation by the command
make doc
Finally, the binaries are installed using the command
make install
With this step, the installation is completed and you can start using NiHu, see the getting started section to see how to get started.
You can compile NiHu on a Windows operating system also by using gcc. You can download a Windows version of gcc-8 environment here.
The configuration step is performed calling the command cmake inside the build directory. The command takes one command line argument, with the path to the directory of the C++ source files, which is nihu/src in our case. For the proper configuration you must specify the option -G "MinGW Makefiles" for the cmake command. The installation directory is defined by the option -DNIHU_INSTALL_DIR="/path/to/install_dir".
/ (slash) character as a separator between subdirectories also on Windows systems. Usage of the \ (backslash) can lead to misinterpretation of absolute and relative paths in cmake.The configuration is performed by the following commands. It is recommended that you use the MinGW Command line application for executing the following commands.
cd nihu md build_dir cd build_dir cmake ../src -G "MinGW Makefiles" -DNIHU_INSTALL_DIR="../install_dir"
cmake from the command prompt, make sure that the cmake executable is included in your PATH environment variable.All sources are compiled by calling the MinGW version of the make command in the build directory.
mingw32-make.exe
mingw32-make.exe command to build 64-bit targets.If you have doxygen installed, the documentation can be compiled by the command
mingw32-make.exe doc
Finally, the binaries are installed using the command
mingw32-make.exe install
With this step, the installation is completed and you can start using NiHu, see the getting started section to see how to get started.
Later versions of Visual Studio can also be used to compile NiHu sources. The following paragraphs demonstrate the process.
The configuration step is performed calling the command cmake inside the build directory. The below example demonstrates how to set up the generator option of cmake for using Visual Studio.
cd nihu md build_dir cd build_dir cmake ..\src -G "Visual Studio 15 2017 Win64" -DNIHU_INSTALL_DIR="..\install_dir"
When the configuration is completed, various Visual Studio project and solution files are generated inside the build directory. These projects can readily be opened
To build NiHu executables using Visual Studio, execute the following command in the command line.
msbuild NiHu.sln /property:Configuration=Release
It is recommended to use the Developer Command Prompt for Visual Studio for executing the msbuild command.
To build or rebuild a single project
msbuild NiHu.sln /property:Configuration=Release /target:<name_of_project>
The NiHu project can also be imported into Qt Creator by choosing File -> Open project and browsing the file CMakeLists.txt from the directory nihu/src.
Then, the project is built using the build tools configured inside Qt Creator.
You can define additional configuration options by using the -D option for the cmake command. By these options you can specify parameters of cmake and NiHu itself. All NiHu-specific options start with the prefix NIHU_. The extra options are defined using the pattern
cmake ../src -DNIHU_EXAMPLE_VARIABLE=1 cmake ../src -DNIHU_EXAMPLE_PATH="path/to/example"
If you define more options at the same time, the name=value pairs should be separated by spaces. You can find additional cmake-related configuration parameters on the website of cmake. Please note that it is not recommended to change the configuration settings that are not listed herein.
make commands. By default, the system default compiler is used. The value of this parameter should be the absolute full path to the executable file of the compiler. (For example, usage of the compiler g++-7 on Unix systems is achieved by the setting: -DCMAKE_CXX_COMPILER="/usr/bin/g++-7")The following options control the behavior of the Fast Multipole Method (FMM) module.
"BFS" (Breadth-first search) or to "DFS" (Depth-first search).The following options control the setup of the matrix library Eigen during the installation process. On Unix systems, the build system will automatically search for an existing installation of Eigen on your computer. If the installed Eigen headers are found, these header files will be used for compiling NiHu sources. On Windows operating systems, NiHu will not search for an existing Eigen installation, but Eigen headers are installed as a part of NiHu. You can override the default behavior by the parameters listed below.
Eigen. When this path is set, NiHu will not search for an existing Eigen installation, but tries to use Eigen header files specified by this path.NIHU_EIGEN_PATH is not specified.Eigen archive. NiHu will extract this archive instead of downloading the source from the predefined URL. This option only makes sense if the NIHU_EIGEN_INSTALL is set to non-zero. cmake or other error when downloading from the official URL, you should try this option.Eigen is installed as a part of NiHu (see above), you can specify which version to install. The default installation version is 3.3.7. Please note that the currently supported versions are 3.2.0, 3.2.7, and 3.3.7.The following options control the setup of the FFT library FFTW3. On Unix systems, NiHu will automatically search for an existing installation of FFTW3 on your computer. On Windows operating systems, FFTW3 will be automatically downloaded and used as a part of NiHu, furthermore, the FFTW static library files necessary for building NiHu executables will have their own build target and will be built during the build process. Alternatively, the variable NIHU_FFTW_PATH can be specified, and in this case the build system will look for the appropriate FFTW files in the specified folder. You can override the default behavior using the parameters listed below:
fftw3.h and the libraries.NIHU_FFTW_PATH is specified.NIHU_FFTW_INSTALL is set to non-zero.3.3.5 is supported.During the configuration step the build system will automatically look for Boost headers and libraries. If your Boost installation is not found automatically, try to specify the option NIHU_BOOST_PATH as explained below. The default behavior of finding the Boost libraries can be overridden using the following parameters:
boost is found.In order to use the Matlab interface of NiHu and to compile mex source files the setup process must find an existing Matlab installation on your computer. NiHu will search for the root directory of your Matlab installation and also for the mex C++ header files. You can customise the Matlab related settings of the installation process by the parameters listed below.
NiHu comes with various test sources, such as
By default, the tests are excluded from the build process, however, you can turn on testing and control the build and installation parameters of all tests using the following settings.
NIHU_ENABLE_TESTING is set to non-zero.make all command. In this case tests can be compiled using separate make commands. This option is only relevant if NIHU_ENABLE_TESTING is set to non-zero.NIHU_ENABLE_TESTING is set to non-zero. You can control the compilation of tutorials by the following parameters.
If you have Doxygen installed, you can build the documentation of NiHu on your own computer and access all help and tutorial documentation locally. The installation process will automatically look for an existing installation of Doxygen on your computer. It is recommended to you use Doxygen version up from 1.8.4. for compiling the documentation.
build_dir/doc/html.NIHU_MATHJAX_DISABLE is not specified or set to zero.install_dir/doc.cmake cache.After the installation process is successfully completed you should be ready to use NiHu on your computer. The brief description in the following will help you with running NiHu tests, compiling your own C++ sources and starting to use the Matlab interface.
If you have built the NiHu test executables (by setting the option -DNIHU_ENABLE_TESTING=1 for the cmake command), you can run them by executing the command ctest inside the build directory. (For other testing related options please refer to Testing options.)
cd build_dir ctest
The command ctest automatically executes all tests and validates the output results. You should see that all tests are passed. If you want to execute only a part of the generated tests, you can execute the command ctest in any of the subdirectories of the folder test inside your build directory. You can also execute the tests one by one in order to get the details of the test outputs.
In order to create and compile your own C++ sources relying on the toolbox, you only have to include the installed header files from the installation directory, install_dir/include. It is convienient to include the NiHu headers in the following manner.
If your source file is named example.cpp you can compile it and create the executable example using the g++ compiler with specifying the include directories by the -I switch using the command
g++ example.cpp -std=c++14 -I/path/to/nihu_install_dir/include -o example
By using the above pattern you only have to add one directory to the include path definitions of the compiler, as demonstrated above.
-std=c++14 option when compiling C++ sources using NiHu.In order to use the functions of the Matlab interface, you should add the Matlab interface path of your NiHu installation to the search path of Matlab. This can be done by executing the install command inside the matlab folder of your NiHu installation.
>> cd '/path/to/nihu_install/matlab' >> install
This will add the necessary directories to Matlab's search path and enables you to call NiHu's Matlab and mex functions from any of your Matlab scripts. After the install script is successfully executed you will see a window displaying the demo applications for the Matlab interface of NiHu. You can open these demos anytime by the command
>> demo toolbox nihu
libstdc++.so.6: version GLIBCXX_... is not found when executing a mex file generated by the NiHu installation process. This is because Matlab not necessarily support newer versions of gcc, see supported compilers. You can fix this issue by redirecting the soft link libstdc++.so.6 in the directory MATLAB_ROOT/sys/os/glnxa64/ to the current version of the stdc++ library. This can be achieved by executing the following commands cd /path/to/MATLAB/sys/os/glnxa64
sudo mv libstdc++.so.6 libstdc++.so.6.old
sudo ln -s /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.17 libstdc++.so.6
Replacing the soft link should fix the problem and mex files should work from this point after restarting Matlab. You can find a longer discussion of this problem on stackoverflow.
Following this documentation you should be able to compile and install NiHu from source. You should also be able to compile your own C++ files using the header files of NiHu or create and run own Matlab files using NiHu's Matlab interface.
In order to find introductory examples of applying NiHu for basic engineering problems, please see the tutorials that will guide you through further steps.
1.8.18