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diff --git a/indra/newview/llpathfindingnavmesh.h b/indra/newview/llpathfindingnavmesh.h
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+/** 
+ * @file llpathfindingnavmesh.h
+ * @author William Todd Stinson
+ * @brief A class for representing the navmesh of a pathfinding region.
+ *
+ * $LicenseInfo:firstyear=2002&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc. 
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLPATHFINDINGNAVMESH_H
+#define LL_LLPATHFINDINGNAVMESH_H
+
+#include "llsd.h"
+#include "lluuid.h"
+
+#include <string>
+
+#include <boost/shared_ptr.hpp>
+#include <boost/function.hpp>
+#include <boost/signals2.hpp>
+
+class LLSD;
+class LLPathfindingNavMesh;
+
+typedef boost::shared_ptr<LLPathfindingNavMesh> LLPathfindingNavMeshPtr;
+
+class LLPathfindingNavMesh
+{
+public:
+	typedef enum {
+		kNavMeshRequestUnknown,
+		kNavMeshRequestStarted,
+		kNavMeshRequestCompleted,
+		kNavMeshRequestNotEnabled,
+		kNavMeshRequestMessageError,
+		kNavMeshRequestFormatError
+	} ENavMeshRequestStatus;
+
+	typedef boost::function<void (ENavMeshRequestStatus, const LLUUID &, U32, const LLSD::Binary &)>         navmesh_callback_t;
+	typedef boost::signals2::signal<void (ENavMeshRequestStatus, const LLUUID &, U32, const LLSD::Binary &)> navmesh_signal_t;
+	typedef boost::signals2::connection                                                                      navmesh_slot_t;
+
+	LLPathfindingNavMesh(const LLUUID &pRegionUUID);
+	virtual ~LLPathfindingNavMesh();
+
+	navmesh_slot_t registerNavMeshListener(navmesh_callback_t pNavMeshCallback);
+
+	bool hasNavMeshVersion(U32 pNavMeshVersion) const;
+
+	void handleRefresh();
+	void handleNavMeshStart(U32 pNavMeshVersion);
+	void handleNavMeshResult(const LLSD &pContent, U32 pNavMeshVersion);
+	void handleNavMeshNotEnabled();
+	void handleNavMeshError(U32 pStatus, const std::string &pReason, const std::string &pURL, U32 pNavMeshVersion);
+
+protected:
+
+private:
+	void setRequestStatus(ENavMeshRequestStatus pNavMeshRequestStatus);
+
+	LLUUID                mRegionUUID;
+	ENavMeshRequestStatus mNavMeshRequestStatus;
+	navmesh_signal_t      mNavMeshSignal;
+	LLSD::Binary          mNavMeshData;
+	U32                   mNavMeshVersion;
+};
+
+#endif // LL_LLPATHFINDINGNAVMESH_H