From e30fae9d2da1001f42bf2ba58082fc9440ed6e70 Mon Sep 17 00:00:00 2001
From: Luke Simonson <simoluk@gmail.com>
Date: Tue, 26 Jul 2011 16:30:59 +0000
Subject: [PATCH] fix for line segment contains point

[SVN r73379]
---
 include/boost/polygon/directed_line_segment_concept.hpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/boost/polygon/directed_line_segment_concept.hpp b/include/boost/polygon/directed_line_segment_concept.hpp
index 17421c0..1846b7c 100644
--- a/include/boost/polygon/directed_line_segment_concept.hpp
+++ b/include/boost/polygon/directed_line_segment_concept.hpp
@@ -143,6 +143,11 @@ namespace boost { namespace polygon{
     if(on_above_or_below(segment, value) == 0) {
       rectangle_data<typename directed_line_segment_traits<segment_type>::coordinate_type> rect;
       set_points(rect, low(segment), high(segment));
+      if(area(rect) == 0.0) {
+        if(!consider_touch) {
+          return !equivalence(value, low(segment)) && !equivalence(value, high(segment));
+        }
+      }
       return contains(rect, value, consider_touch);
     }
     return false;