llagent.cpp

/** 
 * @file llagent.cpp
 * @brief LLAgent class implementation
 *
 * $LicenseInfo:firstyear=2001&license=viewergpl$
 * 
 * Copyright (c) 2001-2009, Linden Research, Inc.
 * 
 * Second Life Viewer Source Code
 * 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 "llagent.h" 

#include "pipeline.h"

#include "llagentcamera.h"
#include "llagentlistener.h"
#include "llagentwearables.h"
#include "llagentui.h"
#include "llanimationstates.h"
#include "llbottomtray.h"
#include "llcallingcard.h"
#include "llchannelmanager.h"
#include "llconsole.h"
#include "llfirstuse.h"
#include "llfloatercamera.h"
#include "llfloaterreg.h"
#include "llfloatertools.h"
#include "llgroupactions.h"
#include "llgroupmgr.h"
#include "llhomelocationresponder.h"
#include "llhudmanager.h"
#include "lljoystickbutton.h"
#include "llmorphview.h"
#include "llmoveview.h"
#include "llnavigationbar.h" // to show/hide navigation bar when changing mouse look state
#include "llnearbychatbar.h"
#include "llnotificationsutil.h"
#include "llpaneltopinfobar.h"
#include "llparcel.h"
#include "llrendersphere.h"
#include "llsdutil.h"
#include "llsidetray.h"
#include "llsky.h"
#include "llsmoothstep.h"
#include "llstatusbar.h"
#include "llteleportflags.h"
#include "lltool.h"
#include "lltoolmgr.h"
#include "lltrans.h"
#include "llviewercontrol.h"
#include "llviewerdisplay.h"
#include "llviewerjoystick.h"
#include "llviewermediafocus.h"
#include "llviewermenu.h"
#include "llviewerobjectlist.h"
#include "llviewerparcelmgr.h"
#include "llviewerstats.h"
#include "llvoavatarself.h"
#include "llwindow.h"
#include "llworld.h"
#include "llworldmap.h"

using namespace LLVOAvatarDefines;

extern LLMenuBarGL* gMenuBarView;

const BOOL ANIMATE = TRUE;
const U8 AGENT_STATE_TYPING =	0x04;
const U8 AGENT_STATE_EDITING =  0x10;

// Autopilot constants
const F32 AUTOPILOT_HEIGHT_ADJUST_DISTANCE = 8.f;			// meters
const F32 AUTOPILOT_MIN_TARGET_HEIGHT_OFF_GROUND = 1.f;	// meters
const F32 AUTOPILOT_MAX_TIME_NO_PROGRESS = 1.5f;		// seconds

const F32 MAX_VELOCITY_AUTO_LAND_SQUARED = 4.f * 4.f;
const F64 CHAT_AGE_FAST_RATE = 3.0;

// fidget constants
const F32 MIN_FIDGET_TIME = 8.f; // seconds
const F32 MAX_FIDGET_TIME = 20.f; // seconds


// The agent instance.
LLAgent gAgent;

//--------------------------------------------------------------------
// Statics
//

const F32 LLAgent::TYPING_TIMEOUT_SECS = 5.f;

std::map<std::string, std::string> LLAgent::sTeleportErrorMessages;
std::map<std::string, std::string> LLAgent::sTeleportProgressMessages;

class LLAgentFriendObserver : public LLFriendObserver
{
public:
	LLAgentFriendObserver() {}
	virtual ~LLAgentFriendObserver() {}
	virtual void changed(U32 mask);
};

void LLAgentFriendObserver::changed(U32 mask)
{
	// if there's a change we're interested in.
	if((mask & (LLFriendObserver::POWERS)) != 0)
	{
		gAgent.friendsChanged();
	}
}

bool handleSlowMotionAnimation(const LLSD& newvalue)
{
	if (newvalue.asBoolean())
	{
		gAgentAvatarp->setAnimTimeFactor(0.2f);
	}
	else
	{
		gAgentAvatarp->setAnimTimeFactor(1.0f);
	}
	return true;
}

// ************************************************************
// Enabled this definition to compile a 'hacked' viewer that
// locally believes the end user has godlike powers.
// #define HACKED_GODLIKE_VIEWER
// For a toggled version, see viewer.h for the
// TOGGLE_HACKED_GODLIKE_VIEWER define, instead.
// ************************************************************

// Constructors and Destructors

// JC - Please try to make this order match the order in the header
// file.  Otherwise it's hard to find variables that aren't initialized.
//-----------------------------------------------------------------------------
// LLAgent()
//-----------------------------------------------------------------------------
LLAgent::LLAgent() :
	mGroupPowers(0),
	mHideGroupTitle(FALSE),
	mGroupID(),

	mInitialized(FALSE),
	mListener(),

	mDoubleTapRunTimer(),
	mDoubleTapRunMode(DOUBLETAP_NONE),

	mbAlwaysRun(false),
	mbRunning(false),

	mAgentAccess(gSavedSettings),
	mTeleportState( TELEPORT_NONE ),
	mRegionp(NULL),

	mAgentOriginGlobal(),
	mPositionGlobal(),

	mDistanceTraveled(0.F),
	mLastPositionGlobal(LLVector3d::zero),

	mRenderState(0),
	mTypingTimer(),

	mViewsPushed(FALSE),

	mCustomAnim(FALSE),
	mShowAvatar(TRUE),
	mFrameAgent(),

	mIsBusy(FALSE),

	mControlFlags(0x00000000),
	mbFlagsDirty(FALSE),
	mbFlagsNeedReset(FALSE),

	mbJump(FALSE),

	mAutoPilot(FALSE),
	mAutoPilotFlyOnStop(FALSE),
	mAutoPilotTargetGlobal(),
	mAutoPilotStopDistance(1.f),
	mAutoPilotUseRotation(FALSE),
	mAutoPilotTargetFacing(LLVector3::zero),
	mAutoPilotTargetDist(0.f),
	mAutoPilotNoProgressFrameCount(0),
	mAutoPilotRotationThreshold(0.f),
	mAutoPilotFinishedCallback(NULL),
	mAutoPilotCallbackData(NULL),
	
	mEffectColor(LLColor4(0.f, 1.f, 1.f, 1.f)),

	mHaveHomePosition(FALSE),
	mHomeRegionHandle( 0 ),
	mNearChatRadius(CHAT_NORMAL_RADIUS / 2.f),

	mNextFidgetTime(0.f),
	mCurrentFidget(0),
	mFirstLogin(FALSE),
	mGenderChosen(FALSE),

	mAppearanceSerialNum(0)
{
	for (U32 i = 0; i < TOTAL_CONTROLS; i++)
	{
		mControlsTakenCount[i] = 0;
		mControlsTakenPassedOnCount[i] = 0;
	}

	mListener.reset(new LLAgentListener(*this));

	mMoveTimer.stop();
}

// Requires gSavedSettings to be initialized.
//-----------------------------------------------------------------------------
// init()
//-----------------------------------------------------------------------------
void LLAgent::init()
{
	mMoveTimer.start();

	gSavedSettings.declareBOOL("SlowMotionAnimation", FALSE, "Declared in code", FALSE);
	gSavedSettings.getControl("SlowMotionAnimation")->getSignal()->connect(boost::bind(&handleSlowMotionAnimation, _2));
	
	// *Note: this is where LLViewerCamera::getInstance() used to be constructed.

	setFlying( gSavedSettings.getBOOL("FlyingAtExit") );

	mEffectColor = LLUIColorTable::instance().getColor("EffectColor");

	gSavedSettings.getControl("PreferredMaturity")->getValidateSignal()->connect(boost::bind(&LLAgent::validateMaturity, this, _2));
	gSavedSettings.getControl("PreferredMaturity")->getSignal()->connect(boost::bind(&LLAgent::handleMaturity, this, _2));
	
	mInitialized = TRUE;
}

//-----------------------------------------------------------------------------
// cleanup()
//-----------------------------------------------------------------------------
void LLAgent::cleanup()
{
	mRegionp = NULL;
}

//-----------------------------------------------------------------------------
// LLAgent()
//-----------------------------------------------------------------------------
LLAgent::~LLAgent()
{
	cleanup();

	// *Note: this is where LLViewerCamera::getInstance() used to be deleted.
}

// Handle any actions that need to be performed when the main app gains focus
// (such as through alt-tab).
//-----------------------------------------------------------------------------
// onAppFocusGained()
//-----------------------------------------------------------------------------
void LLAgent::onAppFocusGained()
{
	if (CAMERA_MODE_MOUSELOOK == gAgentCamera.getCameraMode())
	{
		gAgentCamera.changeCameraToDefault();
		LLToolMgr::getInstance()->clearSavedTool();
	}
}


void LLAgent::ageChat()
{
	if (isAgentAvatarValid())
	{
		// get amount of time since I last chatted
		F64 elapsed_time = (F64)gAgentAvatarp->mChatTimer.getElapsedTimeF32();
		// add in frame time * 3 (so it ages 4x)
		gAgentAvatarp->mChatTimer.setAge(elapsed_time + (F64)gFrameDTClamped * (CHAT_AGE_FAST_RATE - 1.0));
	}
}

//-----------------------------------------------------------------------------
// moveAt()
//-----------------------------------------------------------------------------
void LLAgent::moveAt(S32 direction, bool reset)
{
	mMoveTimer.reset();
	LLFirstUse::notMoving(false);

	// age chat timer so it fades more quickly when you are intentionally moving
	ageChat();

	gAgentCamera.setAtKey(LLAgentCamera::directionToKey(direction));

	if (direction > 0)
	{
		setControlFlags(AGENT_CONTROL_AT_POS | AGENT_CONTROL_FAST_AT);
	}
	else if (direction < 0)
	{
		setControlFlags(AGENT_CONTROL_AT_NEG | AGENT_CONTROL_FAST_AT);
	}

	if (reset)
	{
		gAgentCamera.resetView();
	}
}

//-----------------------------------------------------------------------------
// moveAtNudge()
//-----------------------------------------------------------------------------
void LLAgent::moveAtNudge(S32 direction)
{
	mMoveTimer.reset();
	LLFirstUse::notMoving(false);

	// age chat timer so it fades more quickly when you are intentionally moving
	ageChat();

	gAgentCamera.setWalkKey(LLAgentCamera::directionToKey(direction));

	if (direction > 0)
	{
		setControlFlags(AGENT_CONTROL_NUDGE_AT_POS);
	}
	else if (direction < 0)
	{
		setControlFlags(AGENT_CONTROL_NUDGE_AT_NEG);
	}

	gAgentCamera.resetView();
}

//-----------------------------------------------------------------------------
// moveLeft()
//-----------------------------------------------------------------------------
void LLAgent::moveLeft(S32 direction)
{
	mMoveTimer.reset();
	LLFirstUse::notMoving(false);

	// age chat timer so it fades more quickly when you are intentionally moving
	ageChat();

	gAgentCamera.setLeftKey(LLAgentCamera::directionToKey(direction));

	if (direction > 0)
	{
		setControlFlags(AGENT_CONTROL_LEFT_POS | AGENT_CONTROL_FAST_LEFT);
	}
	else if (direction < 0)
	{
		setControlFlags(AGENT_CONTROL_LEFT_NEG | AGENT_CONTROL_FAST_LEFT);
	}

	gAgentCamera.resetView();
}

//-----------------------------------------------------------------------------
// moveLeftNudge()
//-----------------------------------------------------------------------------
void LLAgent::moveLeftNudge(S32 direction)
{
	mMoveTimer.reset();
	LLFirstUse::notMoving(false);

	// age chat timer so it fades more quickly when you are intentionally moving
	ageChat();

	gAgentCamera.setLeftKey(LLAgentCamera::directionToKey(direction));

	if (direction > 0)
	{
		setControlFlags(AGENT_CONTROL_NUDGE_LEFT_POS);
	}
	else if (direction < 0)
	{
		setControlFlags(AGENT_CONTROL_NUDGE_LEFT_NEG);
	}

	gAgentCamera.resetView();
}

//-----------------------------------------------------------------------------
// moveUp()
//-----------------------------------------------------------------------------
void LLAgent::moveUp(S32 direction)
{
	mMoveTimer.reset();
	LLFirstUse::notMoving(false);

	// age chat timer so it fades more quickly when you are intentionally moving
	ageChat();

	gAgentCamera.setUpKey(LLAgentCamera::directionToKey(direction));

	if (direction > 0)
	{
		setControlFlags(AGENT_CONTROL_UP_POS | AGENT_CONTROL_FAST_UP);
	}
	else if (direction < 0)
	{
		setControlFlags(AGENT_CONTROL_UP_NEG | AGENT_CONTROL_FAST_UP);
	}

	gAgentCamera.resetView();
}

//-----------------------------------------------------------------------------
// moveYaw()
//-----------------------------------------------------------------------------
void LLAgent::moveYaw(F32 mag, bool reset_view)
{
	gAgentCamera.setYawKey(mag);

	if (mag > 0)
	{
		setControlFlags(AGENT_CONTROL_YAW_POS);
	}
	else if (mag < 0)
	{
		setControlFlags(AGENT_CONTROL_YAW_NEG);
	}

    if (reset_view)
	{
        gAgentCamera.resetView();
	}
}

//-----------------------------------------------------------------------------
// movePitch()
//-----------------------------------------------------------------------------
void LLAgent::movePitch(F32 mag)
{
	gAgentCamera.setPitchKey(mag);

	if (mag > 0)
	{
		setControlFlags(AGENT_CONTROL_PITCH_POS);
	}
	else if (mag < 0)
	{
		setControlFlags(AGENT_CONTROL_PITCH_NEG);
	}
}


// Does this parcel allow you to fly?
BOOL LLAgent::canFly()
{
	if (isGodlike()) return TRUE;

	LLViewerRegion* regionp = getRegion();
	if (regionp && regionp->getBlockFly()) return FALSE;
	
	LLParcel* parcel = LLViewerParcelMgr::getInstance()->getAgentParcel();
	if (!parcel) return FALSE;

	// Allow owners to fly on their own land.
	if (LLViewerParcelMgr::isParcelOwnedByAgent(parcel, GP_LAND_ALLOW_FLY))
	{
		return TRUE;
	}

	return parcel->getAllowFly();
}

BOOL LLAgent::getFlying() const
{ 
	return mControlFlags & AGENT_CONTROL_FLY; 
}

//-----------------------------------------------------------------------------
// setFlying()
//-----------------------------------------------------------------------------
void LLAgent::setFlying(BOOL fly)
{
	if (isAgentAvatarValid())
	{
		// *HACK: Don't allow to start the flying mode if we got ANIM_AGENT_STANDUP signal
		// because in this case we won't get a signal to start avatar flying animation and
		// it will be walking with flying mode "ON" indication. However we allow to switch
		// the flying mode off if we get ANIM_AGENT_STANDUP signal. See process_avatar_animation().
		// See EXT-2781.
		if(fly && gAgentAvatarp->mSignaledAnimations.find(ANIM_AGENT_STANDUP) != gAgentAvatarp->mSignaledAnimations.end())
		{
			return;
		}

		// don't allow taking off while sitting
		if (fly && gAgentAvatarp->isSitting())
		{
			return;
		}
	}

	if (fly)
	{
		BOOL was_flying = getFlying();
		if (!canFly() && !was_flying)
		{
			// parcel doesn't let you start fly
			// gods can always fly
			// and it's OK if you're already flying
			make_ui_sound("UISndBadKeystroke");
			return;
		}
		if( !was_flying )
		{
			LLViewerStats::getInstance()->incStat(LLViewerStats::ST_FLY_COUNT);
		}
		setControlFlags(AGENT_CONTROL_FLY);
	}
	else
	{
		clearControlFlags(AGENT_CONTROL_FLY);
	}


	// Update Movement Controls according to Fly mode
	LLFloaterMove::setFlyingMode(fly);

	mbFlagsDirty = TRUE;
}


// UI based mechanism of setting fly state
//-----------------------------------------------------------------------------
// toggleFlying()
//-----------------------------------------------------------------------------
// static
void LLAgent::toggleFlying()
{
	BOOL fly = !gAgent.getFlying();

	gAgent.setFlying( fly );
	gAgentCamera.resetView();
}

// static
bool LLAgent::enableFlying()
{
	BOOL sitting = FALSE;
	if (isAgentAvatarValid())
	{
		sitting = gAgentAvatarp->isSitting();
	}
	return !sitting;
}

void LLAgent::standUp()
{
	setControlFlags(AGENT_CONTROL_STAND_UP);
}


//-----------------------------------------------------------------------------
// setRegion()
//-----------------------------------------------------------------------------
void LLAgent::setRegion(LLViewerRegion *regionp)
{
	llassert(regionp);
	if (mRegionp != regionp)
	{
		// std::string host_name;
		// host_name = regionp->getHost().getHostName();

		std::string ip = regionp->getHost().getString();
		llinfos << "Moving agent into region: " << regionp->getName()
				<< " located at " << ip << llendl;
		if (mRegionp)
		{
			// We've changed regions, we're now going to change our agent coordinate frame.
			mAgentOriginGlobal = regionp->getOriginGlobal();
			LLVector3d agent_offset_global = mRegionp->getOriginGlobal();

			LLVector3 delta;
			delta.setVec(regionp->getOriginGlobal() - mRegionp->getOriginGlobal());

			setPositionAgent(getPositionAgent() - delta);

			LLVector3 camera_position_agent = LLViewerCamera::getInstance()->getOrigin();
			LLViewerCamera::getInstance()->setOrigin(camera_position_agent - delta);

			// Update all of the regions.
			LLWorld::getInstance()->updateAgentOffset(agent_offset_global);

			// Hack to keep sky in the agent's region, otherwise it may get deleted - DJS 08/02/02
			// *TODO: possibly refactor into gSky->setAgentRegion(regionp)? -Brad
			if (gSky.mVOSkyp)
			{
				gSky.mVOSkyp->setRegion(regionp);
			}
			if (gSky.mVOGroundp)
			{
				gSky.mVOGroundp->setRegion(regionp);
			}

		}
		else
		{
			// First time initialization.
			// We've changed regions, we're now going to change our agent coordinate frame.
			mAgentOriginGlobal = regionp->getOriginGlobal();

			LLVector3 delta;
			delta.setVec(regionp->getOriginGlobal());

			setPositionAgent(getPositionAgent() - delta);
			LLVector3 camera_position_agent = LLViewerCamera::getInstance()->getOrigin();
			LLViewerCamera::getInstance()->setOrigin(camera_position_agent - delta);

			// Update all of the regions.
			LLWorld::getInstance()->updateAgentOffset(mAgentOriginGlobal);
		}
	}
	mRegionp = regionp;

	// Must shift hole-covering water object locations because local
	// coordinate frame changed.
	LLWorld::getInstance()->updateWaterObjects();

	// keep a list of regions we've been too
	// this is just an interesting stat, logged at the dataserver
	// we could trake this at the dataserver side, but that's harder
	U64 handle = regionp->getHandle();
	mRegionsVisited.insert(handle);

	LLSelectMgr::getInstance()->updateSelectionCenter();

	LLFloaterMove::sUpdateFlyingStatus();
}


//-----------------------------------------------------------------------------
// getRegion()
//-----------------------------------------------------------------------------
LLViewerRegion *LLAgent::getRegion() const
{
	return mRegionp;
}


LLHost LLAgent::getRegionHost() const
{
	if (mRegionp)
	{
		return mRegionp->getHost();
	}
	else
	{
		return LLHost::invalid;
	}
}

//-----------------------------------------------------------------------------
// inPrelude()
//-----------------------------------------------------------------------------
BOOL LLAgent::inPrelude()
{
	return mRegionp && mRegionp->isPrelude();
}


//-----------------------------------------------------------------------------
// canManageEstate()
//-----------------------------------------------------------------------------

BOOL LLAgent::canManageEstate() const
{
	return mRegionp && mRegionp->canManageEstate();
}

//-----------------------------------------------------------------------------
// sendMessage()
//-----------------------------------------------------------------------------
void LLAgent::sendMessage()
{
	if (gDisconnected)
	{
		llwarns << "Trying to send message when disconnected!" << llendl;
		return;
	}
	if (!mRegionp)
	{
		llerrs << "No region for agent yet!" << llendl;
		return;
	}
	gMessageSystem->sendMessage(mRegionp->getHost());
}


//-----------------------------------------------------------------------------
// sendReliableMessage()
//-----------------------------------------------------------------------------
void LLAgent::sendReliableMessage()
{
	if (gDisconnected)
	{
		lldebugs << "Trying to send message when disconnected!" << llendl;
		return;
	}
	if (!mRegionp)
	{
		lldebugs << "LLAgent::sendReliableMessage No region for agent yet, not sending message!" << llendl;
		return;
	}
	gMessageSystem->sendReliable(mRegionp->getHost());
}

//-----------------------------------------------------------------------------
// getVelocity()
//-----------------------------------------------------------------------------
LLVector3 LLAgent::getVelocity() const
{
	if (isAgentAvatarValid())
	{
		return gAgentAvatarp->getVelocity();
	}
	else
	{
		return LLVector3::zero;
	}
}


//-----------------------------------------------------------------------------
// setPositionAgent()
//-----------------------------------------------------------------------------
void LLAgent::setPositionAgent(const LLVector3 &pos_agent)
{
	if (!pos_agent.isFinite())
	{
		llerrs << "setPositionAgent is not a number" << llendl;
	}

	if (isAgentAvatarValid() && gAgentAvatarp->getParent())
	{
		LLVector3 pos_agent_sitting;
		LLVector3d pos_agent_d;
		LLViewerObject *parent = (LLViewerObject*)gAgentAvatarp->getParent();

		pos_agent_sitting = gAgentAvatarp->getPosition() * parent->getRotation() + parent->getPositionAgent();
		pos_agent_d.setVec(pos_agent_sitting);

		mFrameAgent.setOrigin(pos_agent_sitting);
		mPositionGlobal = pos_agent_d + mAgentOriginGlobal;
	}
	else
	{
		mFrameAgent.setOrigin(pos_agent);

		LLVector3d pos_agent_d;
		pos_agent_d.setVec(pos_agent);
		mPositionGlobal = pos_agent_d + mAgentOriginGlobal;
	}
}

//-----------------------------------------------------------------------------
// getPositionGlobal()
//-----------------------------------------------------------------------------
const LLVector3d &LLAgent::getPositionGlobal() const
{
	if (isAgentAvatarValid() && !gAgentAvatarp->mDrawable.isNull())
	{
		mPositionGlobal = getPosGlobalFromAgent(gAgentAvatarp->getRenderPosition());
	}
	else
	{
		mPositionGlobal = getPosGlobalFromAgent(mFrameAgent.getOrigin());
	}

	return mPositionGlobal;
}

//-----------------------------------------------------------------------------
// getPositionAgent()
//-----------------------------------------------------------------------------
const LLVector3 &LLAgent::getPositionAgent()
{
	if (isAgentAvatarValid() && !gAgentAvatarp->mDrawable.isNull())
	{
		mFrameAgent.setOrigin(gAgentAvatarp->getRenderPosition());	
	}

	return mFrameAgent.getOrigin();
}

//-----------------------------------------------------------------------------
// getRegionsVisited()
//-----------------------------------------------------------------------------
S32 LLAgent::getRegionsVisited() const
{
	return mRegionsVisited.size();
}

//-----------------------------------------------------------------------------
// getDistanceTraveled()
//-----------------------------------------------------------------------------
F64 LLAgent::getDistanceTraveled() const
{
	return mDistanceTraveled;
}


//-----------------------------------------------------------------------------
// getPosAgentFromGlobal()
//-----------------------------------------------------------------------------
LLVector3 LLAgent::getPosAgentFromGlobal(const LLVector3d &pos_global) const
{
	LLVector3 pos_agent;
	pos_agent.setVec(pos_global - mAgentOriginGlobal);
	return pos_agent;
}


//-----------------------------------------------------------------------------
// getPosGlobalFromAgent()
//-----------------------------------------------------------------------------
LLVector3d LLAgent::getPosGlobalFromAgent(const LLVector3 &pos_agent) const
{
	LLVector3d pos_agent_d;
	pos_agent_d.setVec(pos_agent);
	return pos_agent_d + mAgentOriginGlobal;
}


//-----------------------------------------------------------------------------
// resetAxes()
//-----------------------------------------------------------------------------
void LLAgent::resetAxes()
{
	mFrameAgent.resetAxes();
}


// Copied from LLCamera::setOriginAndLookAt
// Look_at must be unit vector
//-----------------------------------------------------------------------------
// resetAxes()
//-----------------------------------------------------------------------------
void LLAgent::resetAxes(const LLVector3 &look_at)
{
	LLVector3	skyward = getReferenceUpVector();

	// if look_at has zero length, fail
	// if look_at and skyward are parallel, fail
	//
	// Test both of these conditions with a cross product.
	LLVector3 cross(look_at % skyward);
	if (cross.isNull())
	{
		llinfos << "LLAgent::resetAxes cross-product is zero" << llendl;
		return;
	}

	// Make sure look_at and skyward are not parallel
	// and neither are zero length
	LLVector3 left(skyward % look_at);
	LLVector3 up(look_at % left);

	mFrameAgent.setAxes(look_at, left, up);
}


//-----------------------------------------------------------------------------
// rotate()
//-----------------------------------------------------------------------------
void LLAgent::rotate(F32 angle, const LLVector3 &axis) 
{ 
	mFrameAgent.rotate(angle, axis); 
}


//-----------------------------------------------------------------------------
// rotate()
//-----------------------------------------------------------------------------
void LLAgent::rotate(F32 angle, F32 x, F32 y, F32 z) 
{ 
	mFrameAgent.rotate(angle, x, y, z); 
}


//-----------------------------------------------------------------------------
// rotate()
//-----------------------------------------------------------------------------
void LLAgent::rotate(const LLMatrix3 &matrix) 
{ 
	mFrameAgent.rotate(matrix); 
}


//-----------------------------------------------------------------------------
// rotate()
//-----------------------------------------------------------------------------
void LLAgent::rotate(const LLQuaternion &quaternion) 
{ 
	mFrameAgent.rotate(quaternion); 
}


//-----------------------------------------------------------------------------
// getReferenceUpVector()
//-----------------------------------------------------------------------------
LLVector3 LLAgent::getReferenceUpVector()
{
	// this vector is in the coordinate frame of the avatar's parent object, or the world if none
	LLVector3 up_vector = LLVector3::z_axis;
	if (isAgentAvatarValid() && 
		gAgentAvatarp->getParent() &&
		gAgentAvatarp->mDrawable.notNull())
	{
		U32 camera_mode = gAgentCamera.getCameraAnimating() ? gAgentCamera.getLastCameraMode() : gAgentCamera.getCameraMode();
		// and in third person...
		if (camera_mode == CAMERA_MODE_THIRD_PERSON)
		{
			// make the up vector point to the absolute +z axis
			up_vector = up_vector * ~((LLViewerObject*)gAgentAvatarp->getParent())->getRenderRotation();
		}
		else if (camera_mode == CAMERA_MODE_MOUSELOOK)
		{
			// make the up vector point to the avatar's +z axis
			up_vector = up_vector * gAgentAvatarp->mDrawable->getRotation();
		}
	}

	return up_vector;
}


// Radians, positive is forward into ground
//-----------------------------------------------------------------------------
// pitch()
//-----------------------------------------------------------------------------
void LLAgent::pitch(F32 angle)
{
	// don't let user pitch if pointed almost all the way down or up
	mFrameAgent.pitch(clampPitchToLimits(angle));
}


// Radians, positive is forward into ground
//-----------------------------------------------------------------------------
// clampPitchToLimits()
//-----------------------------------------------------------------------------
F32 LLAgent::clampPitchToLimits(F32 angle)
{
	// A dot B = mag(A) * mag(B) * cos(angle between A and B)
	// so... cos(angle between A and B) = A dot B / mag(A) / mag(B)
	//                                  = A dot B for unit vectors

	LLVector3 skyward = getReferenceUpVector();

	F32			look_down_limit;
	F32			look_up_limit = 10.f * DEG_TO_RAD;

	F32 angle_from_skyward = acos( mFrameAgent.getAtAxis() * skyward );

	if (isAgentAvatarValid() && gAgentAvatarp->isSitting())
	{
		look_down_limit = 130.f * DEG_TO_RAD;
	}
	else
	{
		look_down_limit = 170.f * DEG_TO_RAD;
	}

	// clamp pitch to limits
	if ((angle >= 0.f) && (angle_from_skyward + angle > look_down_limit))
	{
		angle = look_down_limit - angle_from_skyward;
	}