From 4d88f6f48f703b942d2923d0aceef7a1b76593e9 Mon Sep 17 00:00:00 2001
From: Yury Melnichek <melnichek@gmail.com>
Date: Sat, 10 Sep 2011 15:54:22 +0200
Subject: [PATCH] Added comments.

---
 geometry/covering_utils.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/geometry/covering_utils.hpp b/geometry/covering_utils.hpp
index 04f67f0089..711a4c09a8 100644
--- a/geometry/covering_utils.hpp
+++ b/geometry/covering_utils.hpp
@@ -10,8 +10,10 @@
 namespace covering
 {
 
+// Result of an intersection between object and cell.
 enum CellObjectIntersection
 {
+  // No intersection. It is important, that its value is 0, so one can do if (intersection) ... .
   CELL_OBJECT_NO_INTERSECTION = 0,
   CELL_OBJECT_INTERSECT = 1,
   CELL_INSIDE_OBJECT = 2,