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before-submitting-pull-request.md

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Before submitting a pull request

There are a variety of things you can do before submitting a pull request that will reduce the effort on the libigl team to merge your code and increase the likelihood that the merge ever happens.

  1. Test your code and submit a unit test as part of the pull request
  2. Verify that your code matches the libigl style guidelines
  3. Run the exhaustive build test below

Exhaustive build test

This script will git clone libigl to a temporary directory and build

  1. the static libigl library,
  2. the tutorial using the default header only libigl, and
  3. the tutorial using the static library libigl.

Eventually this script should also run the unit tests.

# In scripts/clone_and_build.sh add your email address to the line:
# `recipients="[email protected],[email protected]"`
# In your email client (e.g. gmail) create a filter to prevent emails 
# from your local machine from going to spam
scripts/clone_and_build.sh

Direct test of tutorial using static library

This part of the clone_and_build.sh script catches 99% of the compilation issues that don't show up when testing:

cd tutorial/
mkdir build-use-static
cd build-use-static
cmake -DCMAKE_BUILD_TYPE=Release -DLIBIGL_USE_STATIC_LIBRARY=ON ..
make

A typical issue is a missing template instantiation (symbol not found):

"void igl::cgal::points_inside_component<Eigen::Matrix<double, -1, 3, 0, -1, 3>, Eigen::Matrix<int, -1, 3, 0, -1, 3>, Eigen::Matrix<double, -1, 3, 0, -1, 3>, Eigen::Matrix<int, -1, 1, 0, -1, 1> >(Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 1, 0, -1, 1> >&)", referenced from:
    void igl::cgal::outer_hull<Eigen::Matrix<double, -1, 3, 0, -1, 3>, Eigen::Matrix<int, -1, 3, 0, -1, 3>, Eigen::Matrix<int, -1, 3, 0, -1, 3>, Eigen::Matrix<long, -1, 1, 0, -1, 1>, Eigen::Matrix<int, -1, 1, 0, -1, 1> >(Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 0, -1, 3> >&, Eigen::PlainObjectBase<Eigen::Matrix<long, -1, 1, 0, -1, 1> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 1, 0, -1, 1> >&) in libiglboolean.a(mesh_boolean.cpp.o)
    void igl::cgal::outer_hull<Eigen::Matrix<double, -1, 3, 0, -1, 3>, Eigen::Matrix<int, -1, 3, 0, -1, 3>, Eigen::Matrix<int, -1, 3, 0, -1, 3>, Eigen::Matrix<long, -1, 1, 0, -1, 1>, Eigen::Matrix<bool, -1, 1, 0, -1, 1> >(Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 0, -1, 3> >&, Eigen::PlainObjectBase<Eigen::Matrix<long, -1, 1, 0, -1, 1> >&, Eigen::PlainObjectBase<Eigen::Matrix<bool, -1, 1, 0, -1, 1> >&) in libiglboolean.a(mesh_boolean.cpp.o)

This looks like a mess, but the solution is very simple. Copy the chunk inside of the quotes, in this case:

"void igl::cgal::points_inside_component<Eigen::Matrix<double, -1, 3, 0, -1, 3>, Eigen::Matrix<int, -1, 3, 0, -1, 3>, Eigen::Matrix<double, -1, 3, 0, -1, 3>, Eigen::Matrix<int, -1, 1, 0, -1, 1> >(Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 1, 0, -1, 1> >&)"

and paste it at the bottom of the relevant .cpp file with the word template in front of it and a semicolon at then. In this case, in include/igl/cgal/points_inside_component.cpp:

#ifdef IGL_STATIC_LIBRARY
// Explicit template instantiation
template void igl::cgal::points_inside_component<Eigen::Matrix<CGAL::Lazy_exact_nt<CGAL::Gmpq>, -1, 3, 0, -1, 3>, Eigen::Matrix<int, -1, 3, 0, -1, 3>, Eigen::Matrix<CGAL::Lazy_exact_nt<CGAL::Gmpq>, -1, 3, 0, -1, 3>, Eigen::Matrix<int, -1, 1, 0, -1, 1> >(Eigen::PlainObjectBase<Eigen::Matrix<CGAL::Lazy_exact_nt<CGAL::Gmpq>, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<CGAL::Lazy_exact_nt<CGAL::Gmpq>, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 1, 0, -1, 1> >&);
#endif

Then "rinse and repeat".