Start a C++ project

Tip

You are using Python?
Codac is ready to be used on your computer.
You can now copy-paste the following example code in a file named main.cpp:
#include <codac.h>

using namespace std;
using namespace codac;

int main()
{
  Tube x(Interval(0,10), 0.01, TFunction("cos(t)+abs(t-5)*[-0.1,0.1]"));

  vibes::beginDrawing();
  VIBesFigTube fig("My first tube");
  fig.add_tube(&x, "x");
  fig.show();
  vibes::endDrawing();
}

For the compilation of your project, you can use CMake with the following file CMakeLists.txt that you will add in the same directory:

  cmake_minimum_required(VERSION 3.0.2)
  project(my_project LANGUAGES CXX)

# Adding IBEX

  # In case you installed IBEX in a local directory, you need
  # to specify its path with the CMAKE_PREFIX_PATH option.
  # set(CMAKE_PREFIX_PATH "~/ibex-lib/build_install")

  find_package(IBEX REQUIRED)
  ibex_init_common() # IBEX should have installed this function
  message(STATUS "Found IBEX version ${IBEX_VERSION}")

# Adding Eigen3

  # In case you installed Eigen3 in a local directory, you need
  # to specify its path with the CMAKE_PREFIX_PATH option, e.g.
  # set(CMAKE_PREFIX_PATH "~/eigen/build_install")

  find_package(Eigen3 REQUIRED NO_MODULE)
  message(STATUS "Found Eigen3 version ${EIGEN3_VERSION}")

# Adding Codac

  # In case you installed Codac in a local directory, you need
  # to specify its path with the CMAKE_PREFIX_PATH option.
  # set(CMAKE_PREFIX_PATH "~/codac/build_install")

  find_package(CODAC REQUIRED)
  message(STATUS "Found Codac version ${CODAC_VERSION}")

# Compilation

  add_executable(${PROJECT_NAME} main.cpp)
  target_compile_options(${PROJECT_NAME} PUBLIC ${CODAC_CXX_FLAGS})
  target_include_directories(${PROJECT_NAME} SYSTEM PUBLIC ${CODAC_INCLUDE_DIRS} ${EIGEN3_INCLUDE_DIRS})
  target_link_libraries(${PROJECT_NAME} PUBLIC ${CODAC_LIBRARIES} Ibex::ibex ${CODAC_LIBRARIES} Ibex::ibex)

The files main.cpp and CMakeLists.txt appear in the same directory:

my_project
├── CMakeLists.txt
└── main.cpp

Note

Since Codac 3.1, Eigen becomes a dependency of the library.

Custom install directory of IBEX and Codac

If you installed IBEX and/or Codac in a custom directory (instead of the file system such as /usr/local/ under Linux), then you need to specify the CMAKE_PREFIX_PATH option, as indicated in the above CMakeLists.txt file.

Another way is to export the CMAKE_PREFIX_PATH environment variable. For instance:

export CMAKE_PREFIX_PATH=$CMAKE_PREFIX_PATH:$HOME/ibex-lib/build_install
export CMAKE_PREFIX_PATH=$CMAKE_PREFIX_PATH:$HOME/codac/build_install

The compilation of your project is made by the following command line:

mkdir build -p ; cd build ; cmake .. ; make ; cd ..

Lastly, the project can be run with:

./build/my_project
This script will create a simple tube and display it.
In order to visualize the tube, you need to launch the VIBes viewer independently. On Linux, you can for instance execute:
VIBes-viewer

If everything is well installed on your computer, you should see the following window appear:

../_images/helloworld.png