Start a C++ project

Tip

You are using Python?
Start a Python project
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)

  set(CMAKE_CXX_STANDARD 17)
  set(CMAKE_CXX_STANDARD_REQUIRED ON)

# 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

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 before the VIBes viewer independently.

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

../_images/helloworld.png