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diff --git a/indra/newview/llpathfindingpathtool.cpp b/indra/newview/llpathfindingpathtool.cpp
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+++ b/indra/newview/llpathfindingpathtool.cpp
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+/** 
+* @file llpathfindingpathtool.cpp
+* @brief Implementation of llpathfindingpathtool
+* @author Stinson@lindenlab.com
+*
+* $LicenseInfo:firstyear=2012&license=viewerlgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2012, 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
+* $/LicenseInfo$
+*/
+
+
+#include "llviewerprecompiledheaders.h"
+
+#include "llpathfindingpathtool.h"
+
+#include <boost/function.hpp>
+#include <boost/signals2.hpp>
+
+#include "llagent.h"
+#include "llpathfindingmanager.h"
+#include "llpathinglib.h"
+#include "llsingleton.h"
+#include "lltool.h"
+#include "llviewercamera.h"
+#include "llviewerregion.h"
+#include "llviewerwindow.h"
+
+#define PATH_TOOL_NAME "PathfindingPathTool"
+
+LLPathfindingPathTool::LLPathfindingPathTool()
+	: LLTool(PATH_TOOL_NAME),
+	LLSingleton<LLPathfindingPathTool>(),
+	mFinalPathData(),
+	mTempPathData(),
+	mPathResult(LLPathingLib::LLPL_NO_PATH),
+	mCharacterType(kCharacterTypeNone),
+	mPathEventSignal(),
+	mIsLeftMouseButtonHeld(false),
+	mIsMiddleMouseButtonHeld(false),
+	mIsRightMouseButtonHeld(false)
+{
+	setCharacterWidth(1.0f);
+	setCharacterType(mCharacterType);
+}
+
+LLPathfindingPathTool::~LLPathfindingPathTool()
+{
+}
+
+BOOL LLPathfindingPathTool::handleMouseDown(S32 pX, S32 pY, MASK pMask)
+{
+	BOOL returnVal = FALSE;
+
+	if (!mIsLeftMouseButtonHeld && !mIsMiddleMouseButtonHeld && !mIsRightMouseButtonHeld)
+	{
+		if (isAnyPathToolModKeys(pMask))
+		{
+			gViewerWindow->setCursor(isPointAModKeys(pMask)
+				? UI_CURSOR_TOOLPATHFINDING_PATH_START_ADD
+				: UI_CURSOR_TOOLPATHFINDING_PATH_END_ADD);
+			computeFinalPoints(pX, pY, pMask);
+			mIsLeftMouseButtonHeld = true;
+			setMouseCapture(TRUE);
+			returnVal = TRUE;
+		}
+		else if (!isCameraModKeys(pMask))
+		{
+			gViewerWindow->setCursor(UI_CURSOR_TOOLNO);
+			mIsLeftMouseButtonHeld = true;
+			setMouseCapture(TRUE);
+			returnVal = TRUE;
+		}
+	}
+	mIsLeftMouseButtonHeld = true;
+
+	return returnVal;
+}
+
+BOOL LLPathfindingPathTool::handleMouseUp(S32 pX, S32 pY, MASK pMask)
+{
+	BOOL returnVal = FALSE;
+
+	if (mIsLeftMouseButtonHeld && !mIsMiddleMouseButtonHeld && !mIsRightMouseButtonHeld)
+	{
+		computeFinalPoints(pX, pY, pMask);
+		setMouseCapture(FALSE);
+		returnVal = TRUE;
+	}
+	mIsLeftMouseButtonHeld = false;
+
+	return returnVal;
+}
+
+BOOL LLPathfindingPathTool::handleMiddleMouseDown(S32 pX, S32 pY, MASK pMask)
+{
+	setMouseCapture(TRUE);
+	mIsMiddleMouseButtonHeld = true;
+	gViewerWindow->setCursor(UI_CURSOR_TOOLNO);
+
+	return TRUE;
+}
+
+BOOL LLPathfindingPathTool::handleMiddleMouseUp(S32 pX, S32 pY, MASK pMask)
+{
+	if (!mIsLeftMouseButtonHeld && mIsMiddleMouseButtonHeld && !mIsRightMouseButtonHeld)
+	{
+		setMouseCapture(FALSE);
+	}
+	mIsMiddleMouseButtonHeld = false;
+
+	return TRUE;
+}
+
+BOOL LLPathfindingPathTool::handleRightMouseDown(S32 pX, S32 pY, MASK pMask)
+{
+	setMouseCapture(TRUE);
+	mIsRightMouseButtonHeld = true;
+	gViewerWindow->setCursor(UI_CURSOR_TOOLNO);
+
+	return TRUE;
+}
+
+BOOL LLPathfindingPathTool::handleRightMouseUp(S32 pX, S32 pY, MASK pMask)
+{
+	if (!mIsLeftMouseButtonHeld && !mIsMiddleMouseButtonHeld && mIsRightMouseButtonHeld)
+	{
+		setMouseCapture(FALSE);
+	}
+	mIsRightMouseButtonHeld = false;
+
+	return TRUE;
+}
+
+BOOL LLPathfindingPathTool::handleDoubleClick(S32 pX, S32 pY, MASK pMask)
+{
+	return TRUE;
+}
+
+BOOL LLPathfindingPathTool::handleHover(S32 pX, S32 pY, MASK pMask)
+{
+	BOOL returnVal = FALSE;
+
+	if (!mIsLeftMouseButtonHeld && !mIsMiddleMouseButtonHeld && !mIsRightMouseButtonHeld && !isAnyPathToolModKeys(pMask))
+	{
+		gViewerWindow->setCursor(UI_CURSOR_TOOLPATHFINDING);
+	}
+
+	if (!mIsMiddleMouseButtonHeld && !mIsRightMouseButtonHeld && isAnyPathToolModKeys(pMask))
+	{
+		gViewerWindow->setCursor(isPointAModKeys(pMask)
+			? (mIsLeftMouseButtonHeld ? UI_CURSOR_TOOLPATHFINDING_PATH_START_ADD : UI_CURSOR_TOOLPATHFINDING_PATH_START)
+			: (mIsLeftMouseButtonHeld ? UI_CURSOR_TOOLPATHFINDING_PATH_END_ADD : UI_CURSOR_TOOLPATHFINDING_PATH_END));
+		computeTempPoints(pX, pY, pMask);
+		returnVal = TRUE;
+	}
+	else
+	{
+		clearTemp();
+		computeFinalPath();
+	}
+
+	return returnVal;
+}
+
+BOOL LLPathfindingPathTool::handleKey(KEY pKey, MASK pMask)
+{
+	// Eat the escape key or else the camera tool will pick up and reset to default view.  This,
+	// in turn, will cause some other methods to get called.  And one of those methods will reset
+	// the current toolset back to the basic toolset.  This means that the pathfinding path toolset
+	// will no longer be active, but typically with pathfinding path elements on screen.
+	return (pKey == KEY_ESCAPE);
+}
+
+LLPathfindingPathTool::EPathStatus LLPathfindingPathTool::getPathStatus() const
+{
+	EPathStatus status = kPathStatusUnknown;
+
+	if (LLPathingLib::getInstance() == NULL)
+	{
+		status = kPathStatusNotImplemented;
+	}
+	else if ((gAgent.getRegion() != NULL) && !gAgent.getRegion()->capabilitiesReceived())
+	{
+		status = kPathStatusUnknown;
+	}
+	else if (!LLPathfindingManager::getInstance()->isPathfindingEnabledForCurrentRegion())
+	{
+		status = kPathStatusNotEnabled;
+	}
+	else if (!hasFinalA() && !hasFinalB())
+	{
+		status = kPathStatusChooseStartAndEndPoints;
+	}
+	else if (!hasFinalA())
+	{
+		status = kPathStatusChooseStartPoint;
+	}
+	else if (!hasFinalB())
+	{
+		status = kPathStatusChooseEndPoint;
+	}
+	else if (mPathResult == LLPathingLib::LLPL_PATH_GENERATED_OK)
+	{
+		status = kPathStatusHasValidPath;
+	}
+	else if (mPathResult == LLPathingLib::LLPL_NO_PATH)
+	{
+		status = kPathStatusHasInvalidPath;
+	}
+	else
+	{
+		status = kPathStatusError;
+	}
+
+	return status;
+}
+
+F32 LLPathfindingPathTool::getCharacterWidth() const
+{
+	return mFinalPathData.mCharacterWidth;
+}
+
+void LLPathfindingPathTool::setCharacterWidth(F32 pCharacterWidth)
+{
+	mFinalPathData.mCharacterWidth = pCharacterWidth;
+	mTempPathData.mCharacterWidth = pCharacterWidth;
+	computeFinalPath();
+}
+
+LLPathfindingPathTool::ECharacterType LLPathfindingPathTool::getCharacterType() const
+{
+	return mCharacterType;
+}
+
+void LLPathfindingPathTool::setCharacterType(ECharacterType pCharacterType)
+{
+	mCharacterType = pCharacterType;
+
+	LLPathingLib::LLPLCharacterType characterType;
+	switch (pCharacterType)
+	{
+	case kCharacterTypeNone :
+		characterType = LLPathingLib::LLPL_CHARACTER_TYPE_NONE;
+		break;
+	case kCharacterTypeA :
+		characterType = LLPathingLib::LLPL_CHARACTER_TYPE_A;
+		break;
+	case kCharacterTypeB :
+		characterType = LLPathingLib::LLPL_CHARACTER_TYPE_B;
+		break;
+	case kCharacterTypeC :
+		characterType = LLPathingLib::LLPL_CHARACTER_TYPE_C;
+		break;
+	case kCharacterTypeD :
+		characterType = LLPathingLib::LLPL_CHARACTER_TYPE_D;
+		break;
+	default :
+		characterType = LLPathingLib::LLPL_CHARACTER_TYPE_NONE;
+		llassert(0);
+		break;
+	}
+	mFinalPathData.mCharacterType = characterType;
+	mTempPathData.mCharacterType = characterType;
+	computeFinalPath();
+}
+
+bool LLPathfindingPathTool::isRenderPath() const
+{
+	return (hasFinalA() || hasFinalB() || hasTempA() || hasTempB());
+}
+
+void LLPathfindingPathTool::clearPath()
+{
+	clearFinal();
+	clearTemp();
+	computeFinalPath();
+}
+
+LLPathfindingPathTool::path_event_slot_t LLPathfindingPathTool::registerPathEventListener(path_event_callback_t pPathEventCallback)
+{
+	return mPathEventSignal.connect(pPathEventCallback);
+}
+
+bool LLPathfindingPathTool::isAnyPathToolModKeys(MASK pMask) const
+{
+	return ((pMask & (MASK_CONTROL|MASK_SHIFT)) != 0);
+}
+
+bool LLPathfindingPathTool::isPointAModKeys(MASK pMask) const
+{
+	return ((pMask & MASK_CONTROL) != 0);
+}
+
+bool LLPathfindingPathTool::isPointBModKeys(MASK pMask) const
+{
+	return ((pMask & MASK_SHIFT) != 0);
+}
+
+bool LLPathfindingPathTool::isCameraModKeys(MASK pMask) const
+{
+	return ((pMask & MASK_ALT) != 0);
+}
+
+void LLPathfindingPathTool::getRayPoints(S32 pX, S32 pY, LLVector3 &pRayStart, LLVector3 &pRayEnd) const
+{
+	LLVector3 dv = gViewerWindow->mouseDirectionGlobal(pX, pY);
+	LLVector3 mousePos = LLViewerCamera::getInstance()->getOrigin();
+	pRayStart = mousePos;
+	pRayEnd = mousePos + dv * 150;
+}
+
+void LLPathfindingPathTool::computeFinalPoints(S32 pX, S32 pY, MASK pMask)
+{
+	LLVector3 rayStart, rayEnd;
+	getRayPoints(pX, pY, rayStart, rayEnd);
+
+	if (isPointAModKeys(pMask))
+	{
+		setFinalA(rayStart, rayEnd);
+	}
+	else if (isPointBModKeys(pMask))
+	{
+		setFinalB(rayStart, rayEnd);
+	}
+	computeFinalPath();
+}
+
+void LLPathfindingPathTool::computeTempPoints(S32 pX, S32 pY, MASK pMask)
+{
+	LLVector3 rayStart, rayEnd;
+	getRayPoints(pX, pY, rayStart, rayEnd);
+
+	if (isPointAModKeys(pMask))
+	{
+		setTempA(rayStart, rayEnd);
+		if (hasFinalB())
+		{
+			setTempB(getFinalBStart(), getFinalBEnd());
+		}
+	}
+	else if (isPointBModKeys(pMask))
+	{
+		if (hasFinalA())
+		{
+			setTempA(getFinalAStart(), getFinalAEnd());
+		}
+		setTempB(rayStart, rayEnd);
+	}
+	computeTempPath();
+}
+
+void LLPathfindingPathTool::setFinalA(const LLVector3 &pStartPoint, const LLVector3 &pEndPoint)
+{
+	mFinalPathData.mStartPointA = pStartPoint;
+	mFinalPathData.mEndPointA = pEndPoint;
+	mFinalPathData.mHasPointA = true;
+}
+
+bool LLPathfindingPathTool::hasFinalA() const
+{
+	return mFinalPathData.mHasPointA;
+}
+
+const LLVector3 &LLPathfindingPathTool::getFinalAStart() const
+{
+	return mFinalPathData.mStartPointA;
+}
+
+const LLVector3 &LLPathfindingPathTool::getFinalAEnd() const
+{
+	return mFinalPathData.mEndPointA;
+}
+
+void LLPathfindingPathTool::setTempA(const LLVector3 &pStartPoint, const LLVector3 &pEndPoint)
+{
+	mTempPathData.mStartPointA = pStartPoint;
+	mTempPathData.mEndPointA = pEndPoint;
+	mTempPathData.mHasPointA = true;
+}
+
+bool LLPathfindingPathTool::hasTempA() const
+{
+	return mTempPathData.mHasPointA;
+}
+
+void LLPathfindingPathTool::setFinalB(const LLVector3 &pStartPoint, const LLVector3 &pEndPoint)
+{
+	mFinalPathData.mStartPointB = pStartPoint;
+	mFinalPathData.mEndPointB = pEndPoint;
+	mFinalPathData.mHasPointB = true;
+}
+
+bool LLPathfindingPathTool::hasFinalB() const
+{
+	return mFinalPathData.mHasPointB;
+}
+
+const LLVector3 &LLPathfindingPathTool::getFinalBStart() const
+{
+	return mFinalPathData.mStartPointB;
+}
+
+const LLVector3 &LLPathfindingPathTool::getFinalBEnd() const
+{
+	return mFinalPathData.mEndPointB;
+}
+
+void LLPathfindingPathTool::setTempB(const LLVector3 &pStartPoint, const LLVector3 &pEndPoint)
+{
+	mTempPathData.mStartPointB = pStartPoint;
+	mTempPathData.mEndPointB = pEndPoint;
+	mTempPathData.mHasPointB = true;
+}
+
+bool LLPathfindingPathTool::hasTempB() const
+{
+	return mTempPathData.mHasPointB;
+}
+
+void LLPathfindingPathTool::clearFinal()
+{
+	mFinalPathData.mHasPointA = false;
+	mFinalPathData.mHasPointB = false;
+}
+
+void LLPathfindingPathTool::clearTemp()
+{
+	mTempPathData.mHasPointA = false;
+	mTempPathData.mHasPointB = false;
+}
+
+void LLPathfindingPathTool::computeFinalPath()
+{
+	mPathResult = LLPathingLib::LLPL_NO_PATH;
+	if (LLPathingLib::getInstance() != NULL)
+	{
+		mPathResult = LLPathingLib::getInstance()->generatePath(mFinalPathData);
+	}
+	mPathEventSignal();
+}
+
+void LLPathfindingPathTool::computeTempPath()
+{
+	mPathResult = LLPathingLib::LLPL_NO_PATH;
+	if (LLPathingLib::getInstance() != NULL)
+	{
+		mPathResult = LLPathingLib::getInstance()->generatePath(mTempPathData);
+	}
+	mPathEventSignal();
+}