From 2a839e583d5e115c090248bdb14918201541cafb Mon Sep 17 00:00:00 2001
From: Daviw Williams <david@volumesoffun.com>
Date: Tue, 7 May 2013 15:41:26 +0200
Subject: [PATCH] Added stream serialisation to Region.

---
 library/PolyVoxCore/include/PolyVoxCore/Region.h |  5 +++++
 library/PolyVoxCore/source/Region.cpp            | 14 ++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/library/PolyVoxCore/include/PolyVoxCore/Region.h b/library/PolyVoxCore/include/PolyVoxCore/Region.h
index 32aa7715..a0b276cd 100644
--- a/library/PolyVoxCore/include/PolyVoxCore/Region.h
+++ b/library/PolyVoxCore/include/PolyVoxCore/Region.h
@@ -207,8 +207,13 @@ namespace PolyVox
 		int32_t m_iUpperZ;
 	};
 
+	// Non-member functions
 	bool intersects(const Region& a, const Region& b);
 
+	// Non-member overloaded operators. 
+	/// Stream insertion operator.
+    std::ostream& operator<<(std::ostream& os, const Region& region);
+
 	// Functions to be inlined to to be in the header rather than the .cpp.
 	// 'inline' keyword is used for the definition rather than the declaration.
 	// See also http://www.parashift.com/c++-faq-lite/inline-functions.html
diff --git a/library/PolyVoxCore/source/Region.cpp b/library/PolyVoxCore/source/Region.cpp
index 32d8454d..bf60ceb2 100644
--- a/library/PolyVoxCore/source/Region.cpp
+++ b/library/PolyVoxCore/source/Region.cpp
@@ -470,6 +470,7 @@ namespace PolyVox
 	/**
 	 * This function only returns true if the regions are really intersecting and not simply touching.
 	 */
+
 	bool intersects(const Region& a, const Region& b)
 	{
 		// No intersection if seperated along an axis.
@@ -480,4 +481,17 @@ namespace PolyVox
 		// Overlapping on all axes means Regions are intersecting.
 		return true;
 	}
+
+	/**
+     * Enables the Region to be used intuitively with output streams such as cout.
+     * \param os The output stream to write to.
+     * \param region The Region to write to the stream.
+     * \return A reference to the output stream to allow chaining.
+     */
+	std::ostream& operator<<(std::ostream& os, const Region& region)
+    {
+		os << "(" << region.getLowerX() << "," << region.getLowerY() << "," << region.getLowerZ() <<
+			") to (" << region.getUpperX() << "," << region.getUpperY() << "," << region.getUpperZ() << ")";
+        return os;
+    }	
 }