added comment to base case. Some more preliminaries for rectangle trees.

src/mlpack/core/tree/rectangle_tree/rectangle_tree.hpp

@@ -76,7 +76,7 @@ class RectangleTree
    * @param leafSize Size of each leaf in the tree;
    * @param maxNumChildren The maximum number of child nodes a non-leaf node may have.
    */
-  RectangleTree(MatType& data, const size_t leafSize = 20, const size_t maxNumChildren = 5);
+  RectangleTree(MatType& data, const size_t leafSize = 20, const size_t maxNumChildren = 4);
 
   //TODO implement the oldFromNew stuff if applicable.
 

src/mlpack/methods/neighbor_search/neighbor_search_rules.hpp

@@ -22,7 +22,14 @@ class NeighborSearchRules
                       arma::Mat<size_t>& neighbors,
                       arma::mat& distances,
                       MetricType& metric);
-
+  /**
+   * Get the distance from the query point to the reference point.
+   * This will update the "neighbor" matrix with the new point if appropriate
+   * and will track the number of base cases (number of points evaluated).
+   *
+   * @param queryIndex Index of query point.
+   * @param referenceIndex Index of reference point.
+   */
   double BaseCase(const size_t queryIndex, const size_t referenceIndex);
 
   /**