updating the instructions (not finished)

Author: tomvanmele

README.md

@@ -8,14 +8,14 @@ Opinionated COMPAS-compatible bindings for top-level algorithms of libigl.
 * COMPAS
 * CMake
 * Boost
+* Eigen3
 
 Anaconda 3 can be obtained from the official website. With `conda` installing COMPAS is as simple as `$ conda install COMPAS`. Make sure you have the latest version of COMPAS. You can check the version by typing `python -c “import compas; print(compas.__version__)` in terminal.
 
 ## Git Submodules
 
 * libigl
 * PyBind11
-* Eigen
 
 These are configured in the `.gitmodules` file and will be cloned into the `ext` folder.
 
@@ -46,9 +46,10 @@ conda activate igl
 > On Mac, don't forget to add `python.app`
 
 To make sure that you can build the modules that require `CGAL`, you should also install `Boost` into this environment.
+We also switched to use the `Eigen3` of `conda`. Therefore also install `Eigen3`.
 
 ```bash
-conda install boost
+conda install boost eigen
 ```
 
 > Note that a conda install of Boost into an environment with Python 3.x will install Boost 1.70 and this is only supported since CMake 3.14.
@@ -106,51 +107,3 @@ To build `compas_libigl` with support for boolean operations, modify the followi
 
   * uncomment line 5 (`# from .booleans import *`)
   * uncomment line 6 (`# from .csgtree import *`)
-
-## Cmake
-
-The project has three levels of `CMakeLists.txt` files.
-
-### /CMakeLists.txt
-
-The top level file is located at the root of the project.
-
-### /modules/CMakeLists.txt
-
-The second level file is in the `modules` folder. If you add a new wrapper module, make sure to register it in this file as well.
-
-```make
-add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/xxx)
-```
-
-### /modules/xxx/CMakeLists.txt
-
-Finally there is a `CMakeLists` file per wrapper module. There the most relevant part is to link the correct libraries. For example, the module that wraps `libigl`'s boolean operations requires `CGAL` and this should thus be reflected in the file.
-
-```make
-target_link_libraries(booleans PRIVATE igl::cgal)
-```
-
-## Notes
-
-### Related projects
-
-* [PyMesh](https://github.com/PyMesh/PyMesh)
-* [PyTriangle](https://github.com/pletzer/pytriangle)
-* [Triangle](https://github.com/drufat/triangle)
-* [CMake Triangle](https://github.com/wo80/Triangle)
-* [Projects in C](https://userpages.umbc.edu/~rostamia/cbook/triangle.html)
-* [cppimport](https://github.com/tbenthompson/cppimport)
-
-### PyBind
-
-* [PyBind: building with cmake](https://pybind11.readthedocs.io/en/stable/compiling.html#building-with-cmake)
-* [PyBind: building manually](https://pybind11.readthedocs.io/en/stable/compiling.html#building-manually)
-* <https://github.com/pybind/pybind11/issues/134>
-* <https://github.com/pybind/pybind11/issues/1200>
-* <https://pybind11.readthedocs.io/en/stable/advanced/cast/stl.html>
-
-### SO
-
-* <https://stackoverflow.com/questions/16439654/how-can-i-compile-triangle-using-makefiles-on-a-windows-machine>
-* <https://stackoverflow.com/questions/1099981/why-cant-python-find-shared-objects-that-are-in-directories-in-sys-path>