From b8dbd66db9eef679f8046c3ad84c465b275326e2 Mon Sep 17 00:00:00 2001
From: Sergey Yershov <yershov@corp.mail.ru>
Date: Thu, 17 Sep 2015 13:00:25 +0300
Subject: [PATCH] Fix problem with incorrect results of contains

---
 geometry/region2d.hpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/geometry/region2d.hpp b/geometry/region2d.hpp
index cee91cc26e..b3437dd735 100644
--- a/geometry/region2d.hpp
+++ b/geometry/region2d.hpp
@@ -17,16 +17,18 @@ namespace m2
   {
     struct DefEqualFloat
     {
+      // 10e-9 is two orders of magnitude more accurate than our OSM source data.
+      static double constexpr kPrecision = 10e-9;
       template <class TPoint>
       bool EqualPoints(TPoint const & p1, TPoint const & p2) const
       {
-        return my::AlmostEqualAbs(p1.x, p2.x, static_cast<typename TPoint::value_type>(1e-7)) &&
-               my::AlmostEqualAbs(p1.y, p2.y, static_cast<typename TPoint::value_type>(1e-7));
+        return my::AlmostEqualAbs(p1.x, p2.x, static_cast<typename TPoint::value_type>(kPrecision)) &&
+               my::AlmostEqualAbs(p1.y, p2.y, static_cast<typename TPoint::value_type>(kPrecision));
       }
       template <class TCoord>
-      bool EqualZero(TCoord val, TCoord exp) const
+      bool EqualZero(TCoord val, TCoord) const
       {
-        return my::AlmostEqualAbs(val, 0.0, exp);
+        return my::AlmostEqualAbs(val, 0.0, static_cast<TCoord>(kPrecision));
       }
     };