Clean code and add documentation

include/utils/LayerVector.h

@@ -15,8 +15,9 @@ namespace cura
 /*!
  * \brief The LayerVector class mimics a std::vector but with the index being a LayerIndex, thus it can have negative
  *        values (for raft layers).
- * \note At instantiation, LayerVector will call Raft::getTotalExtraLayers() so it requires the settings to be setup.
- *       After that, it is assumed that this value will not change while the vector is used.
+ * \note When calling the init() method, LayerVector will call Raft::getTotalExtraLayers() so it requires the settings
+ *       to be setup. This is the reason why this is not done in the constructor, and has to be called manually.
+ *       After that, it is assumed that this value will not change as long as the vector is used.
  * \warning It is assumed that items are inserted in layer order, and without missing items, like a std::vector would do
  */
 template<class T>
@@ -33,15 +34,13 @@ class LayerVector
     using difference_type = typename std::vector<value_type>::difference_type;
 
 public:
-    LayerVector()
-    {
-    }
+    LayerVector() = default;
 
     /*!
      * \brief Initializes the vector for use
      * \param contains_raft_layers Indicates whether this vector will contain raft layers
-     * \param total_print_layers The number of print layers (not including raft layers). This is only for pre-reserving
-     *                           stored data and can be safely omitted.
+     * \param print_layers The number of print layers (not including raft layers). This is only for pre-reserving
+     *                     stored data and can be safely omitted.
      * \note It is not mandatory to call this method if you do not intend to store raft layers, but still good practice
      */
     void init(bool contains_raft_layers, size_t print_layers = 0)
@@ -145,6 +144,11 @@ class LayerVector
         return end();
     }
 
+    /*!
+     * \brief Safe method to retrieve an element from the list
+     * \param pos The position of the element to be retrieved
+     * \return The element at the given position, or if there is none, a default-constructed value.
+     */
     value_type get(const LayerIndex& pos) const noexcept
     {
         LayerIndex::value_type index = pos + delta_;

include/utils/polygonUtils.h

@@ -715,15 +715,6 @@ class PolygonUtils
 namespace std
 {
 
-/*template<typename S, typename T>
-struct hash<std::pair<S, T>>
-{
-    size_t operator()(const std::pair<S, T>& pair) const
-    {
-        return 31 * std::hash<S>()(pair.first) + 59 * std::hash<T>()(pair.second);
-    }
-};*/
-
 template<>
 struct hash<cura::ClosestPointPolygon>
 {

src/FffGcodeWriter.cpp

@@ -2463,7 +2463,7 @@ size_t FffGcodeWriter::findUsedExtruderIndex(const SliceDataStorage& storage, co
     }
     else
     {
-        // Asking for extruder on an empty layer, get the one from layer below
+        // Asking for extruder on an empty layer, get the last one from layer below
         return findUsedExtruderIndex(storage, layer_nr - 1, true);
     }
 }

src/sliceDataStorage.cpp

@@ -639,7 +639,7 @@ Shape SliceDataStorage::getMachineBorder(int checking_extruder_nr) const
         Point2LL translation(extruder_settings.get<coord_t>("machine_nozzle_offset_x"), extruder_settings.get<coord_t>("machine_nozzle_offset_y"));
         prime_pos -= translation;
         Shape prime_polygons;
-        prime_polygons.emplace_back(PolygonUtils::makeCircle(prime_pos, prime_clearance, 32));
+        prime_polygons.emplace_back(PolygonUtils::makeCircle(prime_pos, prime_clearance, 64));
         disallowed_areas = disallowed_areas.unionPolygons(prime_polygons);
     }