Added some more doc comments

backend/meson.build

@@ -83,6 +83,7 @@ deps_lib_dirs = [deps_installed / 'lib']
 # - if it doesn't find it, it fallbacks to the subproject wrap system or the
 #   ones installed in ./buildscripts
 
+# these three are picked up due to the installation script in ./buildscripts
 blaze_dep = dependency('blaze')
 blaze_tensor_dep = dependency('BlazeTensor')
 sleef_dep = dependency('sleef', required: false)
@@ -96,11 +97,13 @@ endif
 # blaze and deps commonly used together
 blaze_deps = [blaze_dep, blaze_tensor_dep, sleef_dep]
 
+# this is picked up due to the installation script in ./buildscripts
 brigand_dep = dependency('brigand', required: false)
 if not brigand_dep.found()
     brigand_dep = declare_dependency(include_directories: deps_inc_dirs)
 endif
 
+# this is picked up from ./subprojects
 cxxopts_dep = dependency('cxxopts', fallback : 'cxxopts')
 
 # meson-python: error: Could not map installation path to an equivalent wheel directory:

backend/src/_linalg.cpp

@@ -1,3 +1,6 @@
+/*
+Implements a few basic math functions, intended to be equivalent to elastica._linalg
+*/
 #include <pybind11/pybind11.h>
 #include <pybind11/numpy.h>
 #include <blaze/Math.h>

backend/src/_linalg_numpy.cpp

@@ -1,3 +1,9 @@
+/*
+This file is similar to _linalg.cpp except it uses more naive and slower strategies.
+
+This module was only implemented for experimental/benchmarking purposes and is probably
+not suitable to use in practice.
+*/
 #include <pybind11/pybind11.h>
 #include <pybind11/numpy.h>
 #include <blaze/Math.h>

backend/src/_rotations.cpp

@@ -1,3 +1,6 @@
+/*
+Implements a few basic rotate functions, intended to be equivalent to elastica._rotations
+*/
 #include <pybind11/pybind11.h>
 #include <blaze/Math.h>