SingularityViewer/indra/newview/lltoolpie.cpp

/** 
 * @file lltoolpie.cpp
 * @brief LLToolPie class implementation
 *
 * $LicenseInfo:firstyear=2001&license=viewergpl$
 * Second Life Viewer Source Code
 * Copyright (c) 2001-2009, Linden Research, Inc.
 * 
 * The source code in this file ("Source Code") is provided by Linden Lab
 * to you under the terms of the GNU General Public License, version 2.0
 * ("GPL"), unless you have obtained a separate licensing agreement
 * ("Other License"), formally executed by you and Linden Lab.  Terms of
 * the GPL can be found in doc/GPL-license.txt in this distribution, or
 * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
 * 
 * There are special exceptions to the terms and conditions of the GPL as
 * it is applied to this Source Code. View the full text of the exception
 * in the file doc/FLOSS-exception.txt in this software distribution, or
 * online at
 * http://secondlifegrid.net/programs/open_source/licensing/flossexception
 * 
 * By copying, modifying or distributing this software, you acknowledge
 * that you have read and understood your obligations described above,
 * and agree to abide by those obligations.
 * 
 * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
 * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
 * COMPLETENESS OR PERFORMANCE.
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

#include "lltoolpie.h"

#include "indra_constants.h"
#include "llclickaction.h"
#include "llparcel.h"

#include "llagent.h"
#include "llagentcamera.h"
#include "llfocusmgr.h"
#include "llfirstuse.h"
#include "llfloaterland.h"
#include "llfloaterscriptdebug.h"
#include "llhoverview.h"
#include "llhudeffecttrail.h"
#include "llhudmanager.h"
#include "llmediaentry.h"
#include "llmenugl.h"
#include "llmutelist.h"
#include "llselectmgr.h"
#include "lltoolfocus.h"
#include "lltoolgrab.h"
#include "lltoolmgr.h"
#include "lltoolselect.h"
#include "lltrans.h"
#include "llviewercamera.h"
#include "llviewerparcelmedia.h"
#include "llviewercontrol.h"
#include "llviewermenu.h"
#include "llviewerobjectlist.h"
#include "llviewerobject.h"
#include "llviewerparcelmgr.h"
#include "llviewerwindow.h"
#include "llviewermedia.h"
#include "llvoavatarself.h"
#include "llviewermediafocus.h"
#include "llworld.h"
#include "llui.h"
#include "llweb.h"
// [RLVa:KB] - Checked: 2010-03-06 (RLVa-1.2.0c)
#include "rlvhandler.h"
// [/RLVa:KB]

extern BOOL gDebugClicks;

static void handle_click_action_play();
static void handle_click_action_open_media(LLPointer<LLViewerObject> objectp);
static ECursorType cursor_from_parcel_media(U8 click_action);

LLToolPie::LLToolPie()
:	LLTool(std::string("Pie")),
	mMouseButtonDown( false ),
	mMouseOutsideSlop( false ),
	mMouseSteerX(-1),
	mMouseSteerY(-1),
	mBlockClickToWalk(false),
	mClickAction(0),
	mClickActionBuyEnabled("ClickActionBuyEnabled"),
	mClickActionPayEnabled("ClickActionPayEnabled")
{
}

BOOL LLToolPie::handleAnyMouseClick(S32 x, S32 y, MASK mask, EClickType clicktype, BOOL down)
{
	BOOL result = LLMouseHandler::handleAnyMouseClick(x, y, mask, clicktype, down);
	
	// This override DISABLES the keyboard focus reset that LLTool::handleAnyMouseClick adds.
	// LLToolPie will do the right thing in its pick callback.
	
	return result;
}

BOOL LLToolPie::handleMouseDown(S32 x, S32 y, MASK mask)
{
	mMouseOutsideSlop = FALSE;
	mMouseDownX = x;
	mMouseDownY = y;

	//left mouse down always picks transparent (but see handleMouseUp)
	mPick = gViewerWindow->pickImmediate(x, y, TRUE);
	mPick.mKeyMask = mask;

	mMouseButtonDown = true;

	handleLeftClickPick();

	return TRUE;
}

// Spawn context menus on right mouse down so you can drag over and select
// an item.
BOOL LLToolPie::handleRightMouseDown(S32 x, S32 y, MASK mask)
{
	// don't pick transparent so users can't "pay" transparent objects
	mPick = gViewerWindow->pickImmediate(x, y, FALSE);
	mPick.mKeyMask = mask;

	// claim not handled so UI focus stays same
	if (gAgentCamera.getCameraMode() != CAMERA_MODE_MOUSELOOK || gSavedSettings.getBOOL("LiruMouselookMenu"))
	{
		handleRightClickPick();
	}
	return FALSE;
}

BOOL LLToolPie::handleRightMouseUp(S32 x, S32 y, MASK mask)
{
	LLToolMgr::getInstance()->clearTransientTool();
	return LLTool::handleRightMouseUp(x, y, mask);
}

BOOL LLToolPie::handleScrollWheel(S32 x, S32 y, S32 clicks)
{
	return LLViewerMediaFocus::getInstance()->handleScrollWheel(x, y, clicks);
}

// True if you selected an object.
BOOL LLToolPie::handleLeftClickPick()
{
	S32 x = mPick.mMousePt.mX;
	S32 y = mPick.mMousePt.mY;
	MASK mask = mPick.mKeyMask;
	if (mPick.mPickType == LLPickInfo::PICK_PARCEL_WALL)
	{
		LLParcel* parcel = LLViewerParcelMgr::getInstance()->getCollisionParcel();
		if (parcel)
		{
			LLViewerParcelMgr::getInstance()->selectCollisionParcel();
			if (parcel->getParcelFlag(PF_USE_PASS_LIST) 
				&& !LLViewerParcelMgr::getInstance()->isCollisionBanned())
			{
				// if selling passes, just buy one
				void* deselect_when_done = (void*)TRUE;
				LLPanelLandGeneral::onClickBuyPass(deselect_when_done);
			}
			else
			{
				// not selling passes, get info
				LLFloaterLand::showInstance();
			}
		}

		gFocusMgr.setKeyboardFocus(NULL);
		return LLTool::handleMouseDown(x, y, mask);
	}

	// didn't click in any UI object, so must have clicked in the world
	LLViewerObject *object = mPick.getObject();
	LLViewerObject *parent = NULL;

	if (mPick.mPickType != LLPickInfo::PICK_LAND)
	{
		LLViewerParcelMgr::getInstance()->deselectLand();
	}
	
	if (object)
	{
		parent = object->getRootEdit();
	}

	if (handleMediaClick(mPick))
	{
		return TRUE;
	}

	// If it's a left-click, and we have a special action, do it.
	if (useClickAction(mask, object, parent))
	{
// [RLVa:KB] - Checked: 2010-03-11 (RLVa-1.2.0e) | Modified: RLVa-1.1.0l
		// Block left-click special actions when fartouch restricted
		if ( (rlv_handler_t::isEnabled()) && 
			 (gRlvHandler.hasBehaviour(RLV_BHVR_FARTOUCH)) && (!gRlvHandler.canTouch(object, mPick.mObjectOffset)) )
		{
			return TRUE;
		}
// [/RLVa:KB]

		mClickAction = 0;
		if (object && object->getClickAction()) 
		{
			mClickAction = object->getClickAction();
		}
		else if (parent && parent->getClickAction()) 
		{
			mClickAction = parent->getClickAction();
		}

		switch(mClickAction)
		{
		case CLICK_ACTION_TOUCH:
			// touch behavior down below...
			break;
		case CLICK_ACTION_SIT:
			{
				if (isAgentAvatarValid() && !gAgentAvatarp->isSitting()) // agent not already sitting
				{
					bool disable_click_sit = gSavedSettings.getBOOL("DisableClickSit");
					if (!disable_click_sit)
					{
						if (gSavedSettings.getBOOL("DisableClickSitOtherOwner"))
						{
							disable_click_sit = !object->permYouOwner();
						}
					}
					if (disable_click_sit) return true;
					handle_object_sit_or_stand();
					// put focus in world when sitting on an object
					gFocusMgr.setKeyboardFocus(NULL);
					return TRUE;
				} // else nothing (fall through to touch)
			}
		case CLICK_ACTION_PAY:
			if ( mClickActionPayEnabled )
			{
				if ((object && object->flagTakesMoney())
					|| (parent && parent->flagTakesMoney()))
				{
					// pay event goes to object actually clicked on
					mClickActionObject = object;
					mLeftClickSelection = LLToolSelect::handleObjectSelection(mPick, FALSE, TRUE);
					if (LLSelectMgr::getInstance()->selectGetAllValid())
					{
						// call this right away, since we have all the info we need to continue the action
						selectionPropertiesReceived();
					}
					return TRUE;
				}
			}
			break;
		case CLICK_ACTION_BUY:
			if ( mClickActionBuyEnabled )
			{
				mClickActionObject = parent;
				mLeftClickSelection = LLToolSelect::handleObjectSelection(mPick, FALSE, TRUE, TRUE);
				if (LLSelectMgr::getInstance()->selectGetAllValid())
				{
					// call this right away, since we have all the info we need to continue the action
					selectionPropertiesReceived();
				}
				return TRUE;
			}
			break;
		case CLICK_ACTION_OPEN:
			if (parent && parent->allowOpen())
			{
				mClickActionObject = parent;
				mLeftClickSelection = LLToolSelect::handleObjectSelection(mPick, FALSE, TRUE, TRUE);
				if (LLSelectMgr::getInstance()->selectGetAllValid())
				{
					// call this right away, since we have all the info we need to continue the action
					selectionPropertiesReceived();
				}
			}
			return TRUE;
		case CLICK_ACTION_PLAY:
			handle_click_action_play();
			return TRUE;
		case CLICK_ACTION_OPEN_MEDIA:
			// mClickActionObject = object;
			handle_click_action_open_media(object);
			return TRUE;
		case CLICK_ACTION_ZOOM:
			{
				const F32 PADDING_FACTOR = 2.f;
				LLViewerObject* object = gObjectList.findObject(mPick.mObjectID);

				if (object)
				{
					gAgentCamera.setFocusOnAvatar(FALSE, ANIMATE);

					LLBBox bbox = object->getBoundingBoxAgent() ;
					F32 angle_of_view = llmax(0.1f, LLViewerCamera::getInstance()->getAspect() > 1.f ? LLViewerCamera::getInstance()->getView() * LLViewerCamera::getInstance()->getAspect() : LLViewerCamera::getInstance()->getView());
					F32 distance = bbox.getExtentLocal().magVec() * PADDING_FACTOR / atan(angle_of_view);

					LLVector3 obj_to_cam = LLViewerCamera::getInstance()->getOrigin() - bbox.getCenterAgent();
					obj_to_cam.normVec();

					LLVector3d object_center_global = gAgent.getPosGlobalFromAgent(bbox.getCenterAgent());
					gAgentCamera.setCameraPosAndFocusGlobal(object_center_global + LLVector3d(obj_to_cam * distance),
													  object_center_global,
													  mPick.mObjectID );
				}
			}
			return TRUE;
		default:
			// nothing
			break;
		}
	}

	// put focus back "in world"
	if (gFocusMgr.getKeyboardFocus())
	{
		// don't click to walk on attempt to give focus to world
		mBlockClickToWalk = true;
		gFocusMgr.setKeyboardFocus(NULL);
	}

	BOOL touchable = (object && object->flagHandleTouch())
					 || (parent && parent->flagHandleTouch());

	// Switch to grab tool if physical or triggerable
	if (object && 
		!object->isAvatar() && 
		((object->flagUsePhysics() || (parent && !parent->isAvatar() && parent->flagUsePhysics())) || touchable)
		)
	{
// [RLVa:KB] - Checked: 2010-03-11 (RLVa-1.2.0e) | Modified: RLVa-1.1.0l
		// Triggered by left-clicking on a touchable object
		if ( (rlv_handler_t::isEnabled()) && (!gRlvHandler.canTouch(object, mPick.mObjectOffset)) )
		{
			return LLTool::handleMouseDown(x, y, mask);
		}
// [/RLVa:KB]

		gGrabTransientTool = this;
		mMouseButtonDown = false;
		LLToolMgr::getInstance()->getCurrentToolset()->selectTool( LLToolGrab::getInstance() );
		return LLToolGrab::getInstance()->handleObjectHit( mPick );
	}
	
	LLHUDIcon* last_hit_hud_icon = mPick.mHUDIcon;
	if (!object && last_hit_hud_icon && last_hit_hud_icon->getSourceObject())
	{
		LLFloaterScriptDebug::show(last_hit_hud_icon->getSourceObject()->getID());
	}

	// If left-click never selects or spawns a menu
	// Eat the event.
	if (!gSavedSettings.getBOOL("LeftClickShowMenu"))
	{
		// mouse already released
		if (!mMouseButtonDown)
		{
			return true;
		}

		while( object && object->isAttachment() && !object->flagHandleTouch())
		{
			// don't pick avatar through hud attachment
			if (object->isHUDAttachment())
			{
				break;
			}
			object = (LLViewerObject*)object->getParent();
		}
		if (object && object == gAgentAvatarp /*&& gSavedSettings.getBOOL("ClickToWalk")*/)
		{
			// we left clicked on avatar, switch to focus mode
			mMouseButtonDown = false;
			LLToolMgr::getInstance()->setTransientTool(LLToolCamera::getInstance());
			gViewerWindow->hideCursor();
			LLToolCamera::getInstance()->setMouseCapture(TRUE);
			LLToolCamera::getInstance()->pickCallback(mPick);
			if(gSavedSettings.getBOOL("ResetFocusOnSelfClick"))
			{
				gAgentCamera.setFocusOnAvatar(TRUE, TRUE);
			}

			return TRUE;
		}
		// Could be first left-click on nothing
		LLFirstUse::useLeftClickNoHit();

		// Eat the event
		return LLTool::handleMouseDown(x, y, mask);
	}

	if (gAgent.leftButtonGrabbed())
	{
		// if the left button is grabbed, don't put up the pie menu
		return LLTool::handleMouseDown(x, y, mask);
	}

	// Can't ignore children here.
	LLToolSelect::handleObjectSelection(mPick, FALSE, TRUE);

	// Spawn pie menu
	LLTool::handleRightMouseDown(x, y, mask);
	return TRUE;
}

BOOL LLToolPie::useClickAction(MASK mask,
							   LLViewerObject* object, 
							   LLViewerObject* parent)
{
	return	mask == MASK_NONE
			&& object
			&& !object->isAttachment() 
			&& LLPrimitive::isPrimitive(object->getPCode())
			&& (object->getClickAction() 
				|| parent->getClickAction());

}

U8 final_click_action(LLViewerObject* obj)
{
	if (!obj) return CLICK_ACTION_NONE;
	if (obj->isAttachment()) return CLICK_ACTION_NONE;

	U8 click_action = CLICK_ACTION_TOUCH;
	LLViewerObject* parent = obj->getRootEdit();
	if (obj->getClickAction()
	    || (parent && parent->getClickAction()))
	{
		if (obj->getClickAction())
		{
			click_action = obj->getClickAction();
		}
		else if (parent && parent->getClickAction())
		{
			click_action = parent->getClickAction();
		}
	}
	return click_action;
}

ECursorType LLToolPie::cursorFromObject(LLViewerObject* object)
{
	LLViewerObject* parent = NULL;
	if (object)
	{
		parent = object->getRootEdit();
	}
	U8 click_action = final_click_action(object);
	ECursorType cursor = UI_CURSOR_ARROW;
	switch(click_action)
	{
	case CLICK_ACTION_SIT:
		{
//			if (isAgentAvatarValid() && !gAgentAvatarp->isSitting()) // not already sitting?
// [RLVa:KB] - Checked: 2010-03-06 (RLVa-1.2.0c) | Modified: RLVa-1.2.0g
			if ( (isAgentAvatarValid() && !gAgentAvatarp->isSitting()) &&
				 ((!rlv_handler_t::isEnabled()) || (gRlvHandler.canSit(object, LLToolPie::getInstance()->getHoverPick().mObjectOffset))) )
// [/RLVa:KB]
			{
				cursor = UI_CURSOR_TOOLSIT;
			}
		}
		break;
	case CLICK_ACTION_BUY:
		if ( mClickActionBuyEnabled )
		{
			LLSelectNode* node = LLSelectMgr::getInstance()->getHoverNode();
			if (!node || node->mSaleInfo.isForSale())
			{
				cursor = UI_CURSOR_TOOLBUY;
			}
		}
		break;
	case CLICK_ACTION_OPEN:
		// Open always opens the parent.
		if (parent && parent->allowOpen())
		{
			cursor = UI_CURSOR_TOOLOPEN;
		}
		break;
	case CLICK_ACTION_PAY:	
		if ( mClickActionPayEnabled )
		{
			if ((object && object->flagTakesMoney())
				|| (parent && parent->flagTakesMoney()))
			{
				cursor = UI_CURSOR_TOOLPAY;
			}
		}
		break;
	case CLICK_ACTION_ZOOM:
			cursor = UI_CURSOR_TOOLZOOMIN;
			break;
	case CLICK_ACTION_PLAY:
	case CLICK_ACTION_OPEN_MEDIA: 
		cursor = cursor_from_parcel_media(click_action);
		break;
	default:
		break;
	}
	return cursor;
}

void LLToolPie::resetSelection()
{
	mLeftClickSelection = NULL;
	mClickActionObject = NULL;
	mClickAction = 0;
}

void LLToolPie::walkToClickedLocation()
{
	/* Singu TODO: llhudeffectblob
	if(mAutoPilotDestination) { mAutoPilotDestination->markDead(); }
	mAutoPilotDestination = (LLHUDEffectBlob *)LLHUDManager::getInstance()->createViewerEffect(LLHUDObject::LL_HUD_EFFECT_BLOB, FALSE);
	mAutoPilotDestination->setPositionGlobal(mPick.mPosGlobal);
	mAutoPilotDestination->setPixelSize(5);
	mAutoPilotDestination->setColor(LLColor4U(170, 210, 190));
	mAutoPilotDestination->setDuration(3.f);
	*/

	handle_go_to();
}

// When we get object properties after left-clicking on an object
// with left-click = buy, if it's the same object, do the buy.

// static
void LLToolPie::selectionPropertiesReceived()
{
	// Make sure all data has been received.
	// This function will be called repeatedly as the data comes in.
	if (!LLSelectMgr::getInstance()->selectGetAllValid())
	{
		return;
	}

	LLObjectSelection* selection = LLToolPie::getInstance()->getLeftClickSelection();
	if (selection)
	{
		LLViewerObject* selected_object = selection->getPrimaryObject();
		// since we don't currently have a way to lock a selection, it could have changed
		// after we initially clicked on the object
		if (selected_object == LLToolPie::getInstance()->getClickActionObject())
		{
			U8 click_action = LLToolPie::getInstance()->getClickAction();
			switch (click_action)
			{
			case CLICK_ACTION_BUY:
				if ( LLToolPie::getInstance()->mClickActionBuyEnabled )
				{
					handle_buy();
				}
				break;
			case CLICK_ACTION_PAY:
				if ( LLToolPie::getInstance()->mClickActionPayEnabled )
				{
					handle_give_money_dialog();
				}
				break;
			case CLICK_ACTION_OPEN:
				handle_object_open();
				break;
			default:
				break;
			}
		}
	}
	LLToolPie::getInstance()->resetSelection();
}

BOOL LLToolPie::handleHover(S32 x, S32 y, MASK mask)
{
	mHoverPick = gViewerWindow->pickImmediate(x, y, FALSE);
	LLViewerObject *parent = NULL;
	LLViewerObject *object = mHoverPick.getObject();
	//LLSelectMgr::getInstance()->setHoverObject(object, mHoverPick.mObjectFace); // Singu TODO: remove llhoverview.cpp
// [RLVa:KB] - Checked: 2010-03-11 (RLVa-1.2.0e) | Modified: RLVa-1.1.0l
	// Block all special click action cursors when:
	//   - @fartouch=n restricted and the object is out of range
	//   - @interact=n restricted and the object isn't a HUD attachment
	if ( (object) && (rlv_handler_t::isEnabled()) && 
		( ((gRlvHandler.hasBehaviour(RLV_BHVR_FARTOUCH))) && (!gRlvHandler.canTouch(object, mHoverPick.mObjectOffset)) ||
		  ((gRlvHandler.hasBehaviour(RLV_BHVR_INTERACT)) && (!object->isHUDAttachment())) ) )
	{
		gViewerWindow->setCursor(UI_CURSOR_ARROW);
		return TRUE;
	}
// [/RLVa:KB]

	if (object)
	{
		parent = object->getRootEdit();
	}

	if (handleMediaHover(mHoverPick))
	{
		// cursor set by media object
		LL_DEBUGS("UserInput") << "hover handled by LLToolPie (inactive)" << LL_ENDL;
	}
	else if (!mMouseOutsideSlop
		&& mMouseButtonDown
		&& gSavedSettings.getBOOL("ClickToWalk"))
	{
		S32 delta_x = x - mMouseDownX;
		S32 delta_y = y - mMouseDownY;
		S32 threshold = gSavedSettings.getS32("DragAndDropDistanceThreshold");
		if (delta_x * delta_x + delta_y * delta_y > threshold * threshold)
		{
			startCameraSteering();
			steerCameraWithMouse(x, y);
			gViewerWindow->setCursor(UI_CURSOR_TOOLGRAB);
		}
		else
		{
			gViewerWindow->setCursor(UI_CURSOR_ARROW);
		}
	}
	else if (inCameraSteerMode())
	{
		steerCameraWithMouse(x, y);
		gViewerWindow->setCursor(UI_CURSOR_TOOLGRAB);
	}
	else
	{
		// perform a separate pick that detects transparent objects since they respond to 1-click actions
		LLPickInfo click_action_pick = gViewerWindow->pickImmediate(x, y, TRUE);

		LLViewerObject* click_action_object = click_action_pick.getObject();

		if (click_action_object && useClickAction(mask, click_action_object, click_action_object->getRootEdit()))
		{
			ECursorType cursor = cursorFromObject(click_action_object);
			gViewerWindow->setCursor(cursor);
			LL_DEBUGS("UserInput") << "hover handled by LLToolPie (inactive)" << LL_ENDL;
		}
// [RLVa:KB] - Checked: 2010-03-11 (RLVa-1.2.0e) | Added: RLVa-1.1.0l
		else if ( (object) && (rlv_handler_t::isEnabled()) && (!gRlvHandler.canTouch(object)) )
		{
			// Block showing the "grab" or "touch" cursor if we can't touch the object (@fartouch=n is handled above)
			gViewerWindow->setCursor(UI_CURSOR_ARROW);
		}
// [/RLVa:KB]
		else if ((object && !object->isAvatar() && object->flagUsePhysics()) 
				 || (parent && !parent->isAvatar() && parent->flagUsePhysics()))
		{
			gViewerWindow->setCursor(UI_CURSOR_TOOLGRAB);
			LL_DEBUGS("UserInput") << "hover handled by LLToolPie (inactive)" << LL_ENDL;
		}
		else if ( (object && object->flagHandleTouch()) 
				  || (parent && parent->flagHandleTouch()))
		{
			gViewerWindow->setCursor(UI_CURSOR_HAND);
			LL_DEBUGS("UserInput") << "hover handled by LLToolPie (inactive)" << LL_ENDL;
		}
		else
		{
			gViewerWindow->setCursor(UI_CURSOR_ARROW);
			LL_DEBUGS("UserInput") << "hover handled by LLToolPie (inactive)" << LL_ENDL;
		}
	}

	if(!object)
	{
		LLViewerMediaFocus::getInstance()->clearHover();
	}

	return TRUE;
}

BOOL LLToolPie::handleMouseUp(S32 x, S32 y, MASK mask)
{
	LLViewerObject* obj = mPick.getObject();
	U8 click_action = final_click_action(obj);

	// let media have first pass at click
	if (handleMediaMouseUp() || LLViewerMediaFocus::getInstance()->getFocus())
	{
		mBlockClickToWalk = true;
	}
	stopCameraSteering();
	mMouseButtonDown = false;

	if (click_action == CLICK_ACTION_NONE				// not doing 1-click action
		&& gSavedSettings.getBOOL("ClickToWalk")		// click to walk enabled
		&& !gAgent.getFlying()							// don't auto-navigate while flying until that works
		&& gAgentAvatarp
		&& !gAgentAvatarp->isSitting()
		&& !mBlockClickToWalk							// another behavior hasn't cancelled click to walk
        )
	{
        // We may be doing click to walk, but we don't want to use a target on
        // a transparent object because the user thought they were clicking on
        // whatever they were seeing through it, so recompute what was clicked on
        // ignoring transparent objects
        LLPickInfo savedPick = mPick;
        mPick = gViewerWindow->pickImmediate(savedPick.mMousePt.mX, savedPick.mMousePt.mY,
                                             FALSE /* ignore transparent *//*,
                                             FALSE*/ /* ignore particles */); // Singu TODO: Particle picking

		LLViewerObject* objp = mPick.getObject();
		bool is_in_world = mPick.mObjectID.notNull() && objp && !objp->isHUDAttachment(); // We clicked on a non-hud object
		bool is_land = mPick.mPickType == LLPickInfo::PICK_LAND; // or on land
		bool pos_non_zero = !mPick.mPosGlobal.isExactlyZero(); // valid coordinates for pick
		if (pos_non_zero && (is_land || is_in_world))
        {
			// get pointer to avatar
			while (objp && !objp->isAvatar())
			{
				objp = (LLViewerObject*) objp->getParent();
			}

			if (objp && ((LLVOAvatar*) objp)->isSelf())
			{
				const F64 SELF_CLICK_WALK_DISTANCE = 3.0;
				// pretend we picked some point a bit in front of avatar
				mPick.mPosGlobal = gAgent.getPositionGlobal() + LLVector3d(LLViewerCamera::instance().getAtAxis()) * SELF_CLICK_WALK_DISTANCE;
			}
			gAgentCamera.setFocusOnAvatar(TRUE, TRUE);
			walkToClickedLocation();
            //LLFirstUse::notMoving(false);

			return TRUE;
		}
        else
        {
            LL_DEBUGS("maint5901") << "walk target was "
                                   << (mPick.mPosGlobal.isExactlyZero() ? "zero" : "not zero")
                                   << ", pick type was " << (mPick.mPickType == LLPickInfo::PICK_LAND ? "land" : "not land")
                                   << ", pick object was " << mPick.mObjectID
                                   << LL_ENDL;
            // we didn't click to walk, so restore the original target
            mPick = savedPick;
        }
	}
	gViewerWindow->setCursor(UI_CURSOR_ARROW);
	if (hasMouseCapture())
	{
		setMouseCapture(FALSE);
	}

	LLToolMgr::getInstance()->clearTransientTool();
	gAgentCamera.setLookAt(LOOKAT_TARGET_CONVERSATION, obj); // maybe look at object/person clicked on

	mBlockClickToWalk = false;
	return LLTool::handleMouseUp(x, y, mask);
}

void LLToolPie::stopClickToWalk()
{
	mPick.mPosGlobal = gAgent.getPositionGlobal();
	handle_go_to();
	/* Singu TODO: llhudeffectblob
	if(mAutoPilotDestination)
	{
		mAutoPilotDestination->markDead();
	}
	*/
}

BOOL LLToolPie::handleDoubleClick(S32 x, S32 y, MASK mask)
{
	if (gDebugClicks)
	{
		LL_INFOS() << "LLToolPie handleDoubleClick (becoming mouseDown)" << LL_ENDL;
	}

    if (handleMediaDblClick(mPick))
    {
        return TRUE;
    }

	bool dbl_click_autoplt = gSavedSettings.getBOOL("DoubleClickAutoPilot");
	bool dbl_click_teleport = gSavedSettings.getBOOL("DoubleClickTeleport");

	if (dbl_click_autoplt || dbl_click_teleport)
	{
		// Save the original pick
		LLPickInfo savedPick = mPick;

		// We may be doing double click to walk or a double click teleport, but 
		// we don't want to use a target on a transparent object because the user 
		// thought they were clicking on whatever they were seeing through it, so 
		// recompute what was clicked on ignoring transparent objects
		mPick = gViewerWindow->pickImmediate(savedPick.mMousePt.mX, savedPick.mMousePt.mY,
			FALSE /* ignore transparent *//*,
			FALSE*/ /* ignore particles */); // Singu TODO: Particle picking

		LLViewerObject* objp = mPick.getObject();
		LLViewerObject* parentp = objp ? objp->getRootEdit() : NULL;

		bool is_in_world = mPick.mObjectID.notNull() && objp && !objp->isHUDAttachment();
		bool is_land = mPick.mPickType == LLPickInfo::PICK_LAND;
		bool pos_non_zero = !mPick.mPosGlobal.isExactlyZero();
		bool has_touch_handler = (objp && objp->flagHandleTouch()) || (parentp && parentp->flagHandleTouch());
		bool no_click_action = final_click_action(objp) == CLICK_ACTION_NONE;
		if (pos_non_zero && (is_land || (is_in_world && !has_touch_handler && no_click_action)))
		{
			if (dbl_click_autoplt 
				&& !gAgent.getFlying()							// don't auto-navigate while flying until that works
				&& isAgentAvatarValid()
				&& !gAgentAvatarp->isSitting()
				)
			{
				// get pointer to avatar
				while (objp && !objp->isAvatar())
				{
					objp = (LLViewerObject*) objp->getParent();
				}

				if (objp && ((LLVOAvatar*) objp)->isSelf())
				{
					const F64 SELF_CLICK_WALK_DISTANCE = 3.0;
					// pretend we picked some point a bit in front of avatar
					mPick.mPosGlobal = gAgent.getPositionGlobal() + LLVector3d(LLViewerCamera::instance().getAtAxis()) * SELF_CLICK_WALK_DISTANCE;
				}
				gAgentCamera.setFocusOnAvatar(TRUE, TRUE);
				walkToClickedLocation();
				//LLFirstUse::notMoving(false);
				return TRUE;
			}
			else if (dbl_click_teleport)
			{
				LLVector3d pos = mPick.mPosGlobal;
				pos.mdV[VZ] += gAgentAvatarp->getPelvisToFoot();
				gAgent.teleportViaLocationLookAt(pos);
				return TRUE;
			}
		}

		// restore the original pick for any other purpose
		mPick = savedPick;
	}

	return FALSE;
}

void LLToolPie::handleSelect()
{
	// tool is reselected when app gets focus, etc.
	mBlockClickToWalk = true;
}

void LLToolPie::handleDeselect()
{
	if(	hasMouseCapture() )
	{
		setMouseCapture( FALSE );  // Calls onMouseCaptureLost() indirectly
	}
	// remove temporary selection for pie menu
	LLSelectMgr::getInstance()->setHoverObject(NULL);
	LLSelectMgr::getInstance()->validateSelection();
}

LLTool* LLToolPie::getOverrideTool(MASK mask)
{
	static LLCachedControl<bool> enable_grab(gSavedSettings, "EnableGrab", true);
	if (enable_grab)
	{
		if (mask == MASK_CONTROL)
		{
			return LLToolGrab::getInstance();
		}
		else if (mask == (MASK_CONTROL | MASK_SHIFT))
		{
			return LLToolGrab::getInstance();
		}
	}
	return LLTool::getOverrideTool(mask);
}

void LLToolPie::stopEditing()
{
	if(	hasMouseCapture() )
	{
		setMouseCapture( FALSE );  // Calls onMouseCaptureLost() indirectly
	}
}

void LLToolPie::onMouseCaptureLost()
{
	stopCameraSteering();
	mMouseButtonDown = false;
	handleMediaMouseUp();
}

void LLToolPie::stopCameraSteering()
{
	mMouseOutsideSlop = false;
}

bool LLToolPie::inCameraSteerMode()
{
	return mMouseButtonDown && mMouseOutsideSlop && gSavedSettings.getBOOL("ClickToWalk");
}

// true if x,y outside small box around start_x,start_y
BOOL LLToolPie::outsideSlop(S32 x, S32 y, S32 start_x, S32 start_y)
{
	S32 dx = x - start_x;
	S32 dy = y - start_y;

	return (dx <= -2 || 2 <= dx || dy <= -2 || 2 <= dy);
}


void LLToolPie::render()
{
	return;
}

static void handle_click_action_play()
{
	LLParcel* parcel = LLViewerParcelMgr::getInstance()->getAgentParcel();
	if (!parcel) return;

	LLViewerMediaImpl::EMediaStatus status = LLViewerParcelMedia::getStatus();
	switch(status)
	{
		case LLViewerMediaImpl::MEDIA_PLAYING:
			LLViewerParcelMedia::pause();
			break;

		case LLViewerMediaImpl::MEDIA_PAUSED:
			LLViewerParcelMedia::start();
			break;

		default:
			LLViewerParcelMedia::play(parcel);
			break;
	}
}

bool LLToolPie::handleMediaClick(const LLPickInfo& pick)
{
    //FIXME: how do we handle object in different parcel than us?
    LLParcel* parcel = LLViewerParcelMgr::getInstance()->getAgentParcel();
    LLPointer<LLViewerObject> objectp = pick.getObject();


    if (!parcel ||
        objectp.isNull() ||
        pick.mObjectFace < 0 ||
        pick.mObjectFace >= objectp->getNumTEs())
    {
        LLViewerMediaFocus::getInstance()->clearFocus();

        return false;
    }

    // Does this face have media?
    const LLTextureEntry* tep = objectp->getTE(pick.mObjectFace);
    if (!tep)
        return false;

    LLMediaEntry* mep = (tep->hasMedia()) ? tep->getMediaData() : NULL;
    if (!mep)
        return false;

    viewer_media_t media_impl = LLViewerMedia::getMediaImplFromTextureID(mep->getMediaID());

    if (gSavedSettings.getBOOL("MediaOnAPrimUI"))
    {
        if (!LLViewerMediaFocus::getInstance()->isFocusedOnFace(pick.getObject(), pick.mObjectFace) || media_impl.isNull())
        {
            // It's okay to give this a null impl
            LLViewerMediaFocus::getInstance()->setFocusFace(pick.getObject(), pick.mObjectFace, media_impl, pick.mNormal);
        }
        else
        {
            // Make sure keyboard focus is set to the media focus object.
            gFocusMgr.setKeyboardFocus(LLViewerMediaFocus::getInstance());
            LLEditMenuHandler::gEditMenuHandler = LLViewerMediaFocus::instance().getFocusedMediaImpl();

            media_impl->mouseDown(pick.mUVCoords, gKeyboard->currentMask(TRUE));
            mMediaMouseCaptureID = mep->getMediaID();
            setMouseCapture(TRUE);  // This object will send a mouse-up to the media when it loses capture.
        }

        return true;
    }

    LLViewerMediaFocus::getInstance()->clearFocus();

    return false;
}

bool LLToolPie::handleMediaDblClick(const LLPickInfo& pick)
{
    //FIXME: how do we handle object in different parcel than us?
    LLParcel* parcel = LLViewerParcelMgr::getInstance()->getAgentParcel();
    LLPointer<LLViewerObject> objectp = pick.getObject();


    if (!parcel ||
        objectp.isNull() ||
        pick.mObjectFace < 0 ||
        pick.mObjectFace >= objectp->getNumTEs())
    {
        LLViewerMediaFocus::getInstance()->clearFocus();

        return false;
    }

    // Does this face have media?
    const LLTextureEntry* tep = objectp->getTE(pick.mObjectFace);
    if (!tep)
        return false;

    LLMediaEntry* mep = (tep->hasMedia()) ? tep->getMediaData() : NULL;
    if (!mep)
        return false;

    viewer_media_t media_impl = LLViewerMedia::getMediaImplFromTextureID(mep->getMediaID());

    if (gSavedSettings.getBOOL("MediaOnAPrimUI"))
    {
        if (!LLViewerMediaFocus::getInstance()->isFocusedOnFace(pick.getObject(), pick.mObjectFace) || media_impl.isNull())
        {
            // It's okay to give this a null impl
            LLViewerMediaFocus::getInstance()->setFocusFace(pick.getObject(), pick.mObjectFace, media_impl, pick.mNormal);
        }
        else
        {
            // Make sure keyboard focus is set to the media focus object.
            gFocusMgr.setKeyboardFocus(LLViewerMediaFocus::getInstance());
            LLEditMenuHandler::gEditMenuHandler = LLViewerMediaFocus::instance().getFocusedMediaImpl();

            media_impl->mouseDoubleClick(pick.mUVCoords, gKeyboard->currentMask(TRUE));
            mMediaMouseCaptureID = mep->getMediaID();
            setMouseCapture(TRUE);  // This object will send a mouse-up to the media when it loses capture.
        }

        return true;
    }

    LLViewerMediaFocus::getInstance()->clearFocus();

    return false;
}

bool LLToolPie::handleMediaHover(const LLPickInfo& pick)
{
	//FIXME: how do we handle object in different parcel than us?
	LLParcel* parcel = LLViewerParcelMgr::getInstance()->getAgentParcel();
	if (!parcel) return false;

	LLPointer<LLViewerObject> objectp = pick.getObject();

	// Early out cases.  Must clear media hover. 
	// did not hit an object or did not hit a valid face
	if ( objectp.isNull() ||
		pick.mObjectFace < 0 || 
		pick.mObjectFace >= objectp->getNumTEs() )
	{
		LLViewerMediaFocus::getInstance()->clearHover();
		return false;
	}

	// Does this face have media?
	const LLTextureEntry* tep = objectp->getTE(pick.mObjectFace);
	if(!tep)
		return false;
	
	const LLMediaEntry* mep = tep->hasMedia() ? tep->getMediaData() : NULL;
	if (mep
		&& gSavedSettings.getBOOL("MediaOnAPrimUI"))
	{		
		viewer_media_t media_impl = LLViewerMedia::getMediaImplFromTextureID(mep->getMediaID());
		
		if(media_impl.notNull())
		{
			// Update media hover object
			if (!LLViewerMediaFocus::getInstance()->isHoveringOverFace(objectp, pick.mObjectFace))
			{
				LLViewerMediaFocus::getInstance()->setHoverFace(objectp, pick.mObjectFace, media_impl, pick.mNormal);
			}
			
			// If this is the focused media face, send mouse move events.
			if (LLViewerMediaFocus::getInstance()->isFocusedOnFace(objectp, pick.mObjectFace))
			{
				media_impl->mouseMove(pick.mUVCoords, gKeyboard->currentMask(TRUE));
				gViewerWindow->setCursor(media_impl->getLastSetCursor());
			}
			else
			{
				// This is not the focused face -- set the default cursor.
				gViewerWindow->setCursor(UI_CURSOR_ARROW);
			}

			return true;
		}
	}
	
	// In all other cases, clear media hover.
	LLViewerMediaFocus::getInstance()->clearHover();

	return false;
}

bool LLToolPie::handleMediaMouseUp()
{
	bool result = false;
	if(mMediaMouseCaptureID.notNull())
	{
		// Face media needs to know the mouse went up.
		viewer_media_t media_impl = LLViewerMedia::getMediaImplFromTextureID(mMediaMouseCaptureID);
		if(media_impl)
		{
			// This will send a mouseUp event to the plugin using the last known mouse coordinate (from a mouseDown or mouseMove), which is what we want.
			media_impl->onMouseCaptureLost();
		}

		mMediaMouseCaptureID.setNull();

		result = true;
	}

	return result;
}

static void handle_click_action_open_media(LLPointer<LLViewerObject> objectp)
{
	//FIXME: how do we handle object in different parcel than us?
	LLParcel* parcel = LLViewerParcelMgr::getInstance()->getAgentParcel();
	if (!parcel) return;

	// did we hit an object?
	if (objectp.isNull()) return;

	// did we hit a valid face on the object?
	S32 face = LLToolPie::getInstance()->getPick().mObjectFace;
	if( face < 0 || face >= objectp->getNumTEs() ) return;
		
	// is media playing on this face?
	if (LLViewerMedia::getMediaImplFromTextureID(objectp->getTE(face)->getID()) != NULL)
	{
		handle_click_action_play();
		return;
	}

	std::string media_url = std::string ( parcel->getMediaURL () );
	std::string media_type = std::string ( parcel->getMediaType() );
	LLStringUtil::trim(media_url);

	LLWeb::loadURL(media_url);
}

static ECursorType cursor_from_parcel_media(U8 click_action)
{
	// HACK: This is directly referencing an impl name.  BAD!
	// This can be removed when we have a truly generic media browser that only 
	// builds an impl based on the type of url it is passed.
	
	//FIXME: how do we handle object in different parcel than us?
	ECursorType open_cursor = UI_CURSOR_ARROW;
	LLParcel* parcel = LLViewerParcelMgr::getInstance()->getAgentParcel();
	if (!parcel) return open_cursor;

	std::string media_url = std::string ( parcel->getMediaURL () );
	std::string media_type = std::string ( parcel->getMediaType() );
	LLStringUtil::trim(media_url);

	open_cursor = UI_CURSOR_TOOLMEDIAOPEN;

	LLViewerMediaImpl::EMediaStatus status = LLViewerParcelMedia::getStatus();
	switch(status)
	{
		case LLViewerMediaImpl::MEDIA_PLAYING:
			return click_action == CLICK_ACTION_PLAY ? UI_CURSOR_TOOLPAUSE : open_cursor;
		default:
			return UI_CURSOR_TOOLPLAY;
	}
}


// True if we handled the event.
BOOL LLToolPie::handleRightClickPick()
{
	S32 x = mPick.mMousePt.mX;
	S32 y = mPick.mMousePt.mY;
	MASK mask = mPick.mKeyMask;

	if (mPick.mPickType != LLPickInfo::PICK_LAND)
	{
		LLViewerParcelMgr::getInstance()->deselectLand();
	}

	// didn't click in any UI object, so must have clicked in the world
	LLViewerObject *object = mPick.getObject();

	// Can't ignore children here.
	LLToolSelect::handleObjectSelection(mPick, FALSE, TRUE);

	// Spawn pie menu
	if (mPick.mPickType == LLPickInfo::PICK_LAND)
	{
		LLParcelSelectionHandle selection = LLViewerParcelMgr::getInstance()->selectParcelAt( mPick.mPosGlobal );
		gMenuHolder->setParcelSelection(selection);
		gPieLand->show(x, y);

		showVisualContextMenuEffect();

	}
	else if (mPick.mObjectID == gAgent.getID() )
	{
		if(!gPieSelf)
		{
			//either at very early startup stage or at late quitting stage,
			//this event is ignored.
			return TRUE ;
		}

		gPieSelf->show(x, y);
	}
	else if (object)
	{
		gMenuHolder->setObjectSelection(LLSelectMgr::getInstance()->getSelection());

		bool is_other_attachment = (object->isAttachment() && !object->isHUDAttachment() && !object->permYouOwner());
		if (object->isAvatar()
			|| is_other_attachment)
		{
			// Find the attachment's avatar
			while( object && object->isAttachment())
			{
				object = (LLViewerObject*)object->getParent();
				llassert(object);
			}

			if (!object)
			{
				return TRUE; // unexpected, but escape
			}

			// Object is an avatar, so check for mute by id.
			LLVOAvatar* avatar = (LLVOAvatar*)object;
			std::string name = avatar->getFullname();
			std::string mute_msg;
			if (LLMuteList::getInstance()->isMuted(avatar->getID(), name))
			{
				mute_msg = LLTrans::getString("UnmuteAvatar");
			}
			else
			{
				mute_msg = LLTrans::getString("MuteAvatar");
			}
			gMenuHolder->childSetText("Avatar Mute", mute_msg);

// [RLVa:KB] - Checked: 2010-04-11 (RLVa-1.2.0e) | Modified: RLVa-1.1.0l
			// Don't show the pie menu on empty selection when fartouch restricted [see LLToolSelect::handleObjectSelection()]
			if ( (!rlv_handler_t::isEnabled()) || (!LLSelectMgr::getInstance()->getSelection()->isEmpty()) ||
				 (!gRlvHandler.hasBehaviour(RLV_BHVR_FARTOUCH)) )
			{
// [/RLVa:KB]
				/*if (is_other_attachment)
				{
					gPieAttachmentOther->show(x, y);
				}
				else*/
				{
					gPieAvatar->show(x, y);
				}
// [RLVa:KB] - Checked: 2010-04-11 (RLVa-1.2.0e) | Modified: RLVa-1.1.0l
			}
			else
			{
				make_ui_sound("UISndInvalidOp");
			}
// [/RLVa:KB]
		}
		else if (object->isAttachment())
		{
			gPieAttachment->show(x, y);
		}
		else
		{
			// BUG: What about chatting child objects?
			std::string name;
			LLSelectNode* node = LLSelectMgr::getInstance()->getSelection()->getFirstRootNode();
			if (node)
			{
				name = node->mName;
			}
			std::string mute_msg;
			if (LLMuteList::getInstance()->isMuted(object->getID(), name))
			{
				mute_msg = LLTrans::getString("UnmuteObject");
			}
			else
			{
				mute_msg = LLTrans::getString("MuteObject2");
			}

// [RLVa:KB] - Checked: 2010-04-11 (RLVa-1.2.el) | Modified: RLVa-1.1.0l
			// Don't show the pie menu on empty selection when fartouch/interaction restricted
			// (not entirely accurate in case of Tools / Select Only XXX [see LLToolSelect::handleObjectSelection()]
			if ( (!rlv_handler_t::isEnabled()) || (!LLSelectMgr::getInstance()->getSelection()->isEmpty()) ||
				 (!gRlvHandler.hasBehaviour(RLV_BHVR_FARTOUCH)) )
			{
// [/RLVa:KB]
				gMenuHolder->childSetText("Object Mute", mute_msg);
				gPieObject->show(x, y);

				showVisualContextMenuEffect();
// [RLVa:KB] - Checked: 2010-04-11 (RLVa-1.2.el) | Modified: RLVa-1.1.0l
			}
			else
			{
				make_ui_sound("UISndInvalidOp");
			}
// [/RLVa:KB]
		}
	}

	LLTool::handleRightMouseDown(x, y, mask);
	// We handled the event.
	return TRUE;
}

void LLToolPie::showVisualContextMenuEffect()
{
	if (gSavedSettings.getBOOL("DisablePointAtAndBeam"))
	{
		return;
	}

	// VEFFECT: ShowPie
	LLHUDEffectSpiral *effectp = (LLHUDEffectSpiral *)LLHUDManager::getInstance()->createViewerEffect(LLHUDObject::LL_HUD_EFFECT_SPHERE, TRUE);
	effectp->setPositionGlobal(mPick.mPosGlobal);
	effectp->setColor(LLColor4U(gAgent.getEffectColor()));
	effectp->setDuration(0.25f);
}

typedef enum e_near_far
{
	NEAR_INTERSECTION,
	FAR_INTERSECTION
} ENearFar;

bool intersect_ray_with_sphere( const LLVector3& ray_pt, const LLVector3& ray_dir, const LLVector3& sphere_center, F32 sphere_radius, e_near_far near_far, LLVector3& intersection_pt)
{
	// do ray/sphere intersection by solving quadratic equation
	LLVector3 sphere_to_ray_start_vec = ray_pt - sphere_center;
	F32 B = 2.f * ray_dir * sphere_to_ray_start_vec;
	F32 C = sphere_to_ray_start_vec.lengthSquared() - (sphere_radius * sphere_radius);

	F32 discriminant = B*B - 4.f*C;
	if (discriminant >= 0.f)
	{	// intersection detected, now find closest one
		F32 t0 = (-B - sqrtf(discriminant)) / 2.f;

		if (t0 > 0.f && near_far == NEAR_INTERSECTION)
		{
			intersection_pt = ray_pt + ray_dir * t0;
		}
		else
		{
			F32 t1 = (-B + sqrtf(discriminant)) / 2.f;
			intersection_pt = ray_pt + ray_dir * t1;
		}
		return true;
	}
	else
	{	// no intersection
		return false;
	}
}

void LLToolPie::startCameraSteering()
{
	//LLFirstUse::notMoving(false);
	mMouseOutsideSlop = true;
	mBlockClickToWalk = true;

	if (gAgentCamera.getFocusOnAvatar())
	{
		mSteerPick = mPick;

		// handle special cases of steering picks
		LLViewerObject* avatar_object = mSteerPick.getObject();

		// get pointer to avatar
		while (avatar_object && !avatar_object->isAvatar())
		{
			avatar_object = (LLViewerObject*)avatar_object->getParent();
		}

		// if clicking on own avatar...
		if (avatar_object && ((LLVOAvatar*)avatar_object)->isSelf())
		{
			// ...project pick point a few meters in front of avatar
			mSteerPick.mPosGlobal = gAgent.getPositionGlobal() + LLVector3d(LLViewerCamera::instance().getAtAxis()) * 3.0;
		}

		if (!mSteerPick.isValid())
		{
			mSteerPick.mPosGlobal = gAgent.getPosGlobalFromAgent(
				LLViewerCamera::instance().getOrigin() + gViewerWindow->mouseDirectionGlobal(mSteerPick.mMousePt.mX, mSteerPick.mMousePt.mY) * 100.f);
		}

		setMouseCapture(TRUE);

		mMouseSteerX = mMouseDownX;
		mMouseSteerY = mMouseDownY;
		const LLVector3 camera_to_rotation_center	= gAgent.getFrameAgent().getOrigin() - LLViewerCamera::instance().getOrigin();
		const LLVector3 rotation_center_to_pick		= gAgent.getPosAgentFromGlobal(mSteerPick.mPosGlobal) - gAgent.getFrameAgent().getOrigin();

		mClockwise = camera_to_rotation_center * rotation_center_to_pick < 0.f;
		/* Singu TODO: llhudeffectblob
		if (mMouseSteerGrabPoint) { mMouseSteerGrabPoint->markDead(); }
		mMouseSteerGrabPoint = (LLHUDEffectBlob *)LLHUDManager::getInstance()->createViewerEffect(LLHUDObject::LL_HUD_EFFECT_BLOB, FALSE);
		mMouseSteerGrabPoint->setPositionGlobal(mSteerPick.mPosGlobal);
		mMouseSteerGrabPoint->setColor(LLColor4U(170, 210, 190));
		mMouseSteerGrabPoint->setPixelSize(5);
		mMouseSteerGrabPoint->setDuration(2.f);
		*/
	}
}

void LLToolPie::steerCameraWithMouse(S32 x, S32 y)
{
	const LLViewerCamera& camera = LLViewerCamera::instance();
	const LLCoordFrame& rotation_frame = gAgent.getFrameAgent();
	const LLVector3 pick_pos = gAgent.getPosAgentFromGlobal(mSteerPick.mPosGlobal);
	const LLVector3 pick_rotation_center = rotation_frame.getOrigin() + parallel_component(pick_pos - rotation_frame.getOrigin(), rotation_frame.getUpAxis());
	const F32 MIN_ROTATION_RADIUS_FRACTION = 0.2f;
	const F32 min_rotation_radius = MIN_ROTATION_RADIUS_FRACTION * dist_vec(pick_rotation_center, camera.getOrigin());;
	const F32 pick_distance_from_rotation_center = llclamp(dist_vec(pick_pos, pick_rotation_center), min_rotation_radius, F32_MAX);
	const LLVector3 camera_to_rotation_center = pick_rotation_center - camera.getOrigin();
	const LLVector3 adjusted_camera_pos = LLViewerCamera::instance().getOrigin() + projected_vec(camera_to_rotation_center, rotation_frame.getUpAxis());
	const F32 camera_distance_from_rotation_center = dist_vec(adjusted_camera_pos, pick_rotation_center);

	LLVector3 mouse_ray = orthogonal_component(gViewerWindow->mouseDirectionGlobal(x, y), rotation_frame.getUpAxis());
	mouse_ray.normalize();

	LLVector3 old_mouse_ray = orthogonal_component(gViewerWindow->mouseDirectionGlobal(mMouseSteerX, mMouseSteerY), rotation_frame.getUpAxis());
	old_mouse_ray.normalize();

	F32 yaw_angle;
	F32 old_yaw_angle;
	LLVector3 mouse_on_sphere;
	LLVector3 old_mouse_on_sphere;

	if (intersect_ray_with_sphere(
			adjusted_camera_pos,
			mouse_ray,
			pick_rotation_center,
			pick_distance_from_rotation_center,
			FAR_INTERSECTION,
			mouse_on_sphere))
	{
		LLVector3 mouse_sphere_offset = mouse_on_sphere - pick_rotation_center;
		yaw_angle = atan2f(mouse_sphere_offset * rotation_frame.getLeftAxis(), mouse_sphere_offset * rotation_frame.getAtAxis());
	}
	else
	{
		yaw_angle = F_PI_BY_TWO + asinf(pick_distance_from_rotation_center / camera_distance_from_rotation_center);
		if (mouse_ray * rotation_frame.getLeftAxis() < 0.f)
		{
			yaw_angle *= -1.f;
		}
	}

	if (intersect_ray_with_sphere(
			adjusted_camera_pos,
			old_mouse_ray,
			pick_rotation_center,
			pick_distance_from_rotation_center,
			FAR_INTERSECTION,
			old_mouse_on_sphere))
	{
		LLVector3 mouse_sphere_offset = old_mouse_on_sphere - pick_rotation_center;
		old_yaw_angle = atan2f(mouse_sphere_offset * rotation_frame.getLeftAxis(), mouse_sphere_offset * rotation_frame.getAtAxis());
	}
	else
	{
		old_yaw_angle = F_PI_BY_TWO + asinf(pick_distance_from_rotation_center / camera_distance_from_rotation_center);

		if (old_mouse_ray * rotation_frame.getLeftAxis() < 0.f)
		{
			old_yaw_angle *= -1.f;
		}
	}

	const F32 delta_angle = yaw_angle - old_yaw_angle;

	if (mClockwise)
	{
		gAgent.yaw(delta_angle);
	}
	else
	{
		gAgent.yaw(-delta_angle);
	}

	mMouseSteerX = x;
	mMouseSteerY = y;
}