From b489968dcc1416a530b9f5289b47962e39ec4158 Mon Sep 17 00:00:00 2001
From: Alexander Sulfrian <alexander@sulfrian.net>
Date: Wed, 21 Mar 2012 21:36:59 +0100
Subject: utils/rectangle: added function to intersect two rectangles

---
 src/utils/rectangle.hpp | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'src')

diff --git a/src/utils/rectangle.hpp b/src/utils/rectangle.hpp
index fc5d8ac3..e2fddc78 100644
--- a/src/utils/rectangle.hpp
+++ b/src/utils/rectangle.hpp
@@ -104,6 +104,29 @@ namespace usdx
 		{
 			return point2.get_y() - point1.get_y();
 		}
+
+		const Rectangle<T> intersect(const Rectangle<T>& inner) const
+		{
+			Rectangle<T> result(*this);
+
+			if (inner.point1.get_x() > result.point1.get_x()) {
+				result.point1.set_x(inner.point1.get_x());
+			}
+
+			if (inner.point1.get_y() > result.point1.get_y()) {
+				result.point1.set_y(inner.point1.get_y());
+			}
+
+			if (inner.point2.get_x() < result.point2.get_x()) {
+				result.point2.set_x(inner.point2.get_x());
+			}
+
+			if (inner.point2.get_y() < result.point2.get_y()) {
+				result.point2.set_y(inner.point2.get_y());
+			}
+
+			return result;
+		}
 	};
 };
 
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