To build the Lean files of this project, you need to have a working version of Lean. See the installation instructions (under Regular install).
To get this code (for the first time), run leanproject get fpvandoorn/fast_marching.
If you already have the repo, you can update it (in the fast_marching directory) with git pull.
To build the repo, run leanproject build. To open files in VSCode, always open the whole project (by running code .), instead of opening individual files.