/indra/newview/llviewerobject.cpp

/** 
 * @file llviewerobject.cpp
 * @brief Base class for viewer objects
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * 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
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

#include "llviewerobject.h"

#include "llaudioengine.h"
#include "imageids.h"
#include "indra_constants.h"
#include "llmath.h"
#include "llflexibleobject.h"
#include "llviewercontrol.h"
#include "lldatapacker.h"
#include "llfasttimer.h"
#include "llfloaterreg.h"
#include "llfontgl.h"
#include "llframetimer.h"
#include "llinventory.h"
#include "llinventorydefines.h"
#include "llmaterialtable.h"
#include "llmutelist.h"
#include "llnamevalue.h"
#include "llprimitive.h"
#include "llquantize.h"
#include "llregionhandle.h"
#include "llsdserialize.h"
#include "lltree_common.h"
#include "llxfermanager.h"
#include "message.h"
#include "object_flags.h"
#include "timing.h"

#include "llaudiosourcevo.h"
#include "llagent.h"
#include "llagentcamera.h"
#include "llbbox.h"
#include "llbox.h"
#include "llcylinder.h"
#include "lldrawable.h"
#include "llface.h"
#include "llfloaterproperties.h"
#include "llfloatertools.h"
#include "llfollowcam.h"
#include "llhudtext.h"
#include "llselectmgr.h"
#include "llrendersphere.h"
#include "lltooldraganddrop.h"
#include "llviewercamera.h"
#include "llviewertexturelist.h"
#include "llviewerinventory.h"
#include "llviewerobjectlist.h"
#include "llviewerparceloverlay.h"
#include "llviewerpartsource.h"
#include "llviewerregion.h"
#include "llviewerstats.h"
#include "llviewertextureanim.h"
#include "llviewerwindow.h" // For getSpinAxis
#include "llvoavatar.h"
#include "llvoavatarself.h"
#include "llvograss.h"
#include "llvoground.h"
#include "llvolume.h"
#include "llvolumemessage.h"
#include "llvopartgroup.h"
#include "llvosky.h"
#include "llvosurfacepatch.h"
#include "llvotree.h"
#include "llvovolume.h"
#include "llvowater.h"
#include "llworld.h"
#include "llui.h"
#include "pipeline.h"
#include "llviewernetwork.h"
#include "llvowlsky.h"
#include "llmanip.h"
#include "lltrans.h"
#include "llsdutil.h"
#include "llmediaentry.h"

//#define DEBUG_UPDATE_TYPE

BOOL		LLViewerObject::sVelocityInterpolate = TRUE;
BOOL		LLViewerObject::sPingInterpolate = TRUE; 

U32			LLViewerObject::sNumZombieObjects = 0;
S32			LLViewerObject::sNumObjects = 0;
BOOL		LLViewerObject::sMapDebug = TRUE;
LLColor4	LLViewerObject::sEditSelectColor(	1.0f, 1.f, 0.f, 0.3f);	// Edit OK
LLColor4	LLViewerObject::sNoEditSelectColor(	1.0f, 0.f, 0.f, 0.3f);	// Can't edit
S32			LLViewerObject::sAxisArrowLength(50);
BOOL		LLViewerObject::sPulseEnabled(FALSE);
BOOL		LLViewerObject::sUseSharedDrawables(FALSE); // TRUE

// sMaxUpdateInterpolationTime must be greater than sPhaseOutUpdateInterpolationTime
F64			LLViewerObject::sMaxUpdateInterpolationTime = 3.0;		// For motion interpolation: after X seconds with no updates, don't predict object motion
F64			LLViewerObject::sPhaseOutUpdateInterpolationTime = 2.0;	// For motion interpolation: after Y seconds with no updates, taper off motion prediction


static LLFastTimer::DeclareTimer FTM_CREATE_OBJECT("Create Object");

// static
LLViewerObject *LLViewerObject::createObject(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp)
{
	LLViewerObject *res = NULL;
	LLFastTimer t1(FTM_CREATE_OBJECT);
	
	switch (pcode)
	{
	case LL_PCODE_VOLUME:
	  res = new LLVOVolume(id, pcode, regionp); break;
	case LL_PCODE_LEGACY_AVATAR:
	{
		if (id == gAgentID)
		{
			if (!gAgentAvatarp)
			{
				gAgentAvatarp = new LLVOAvatarSelf(id, pcode, regionp);
				gAgentAvatarp->initInstance();
			}
			else 
			{
				gAgentAvatarp->updateRegion(regionp);
			}
			res = gAgentAvatarp;
		}
		else
		{
			LLVOAvatar *avatar = new LLVOAvatar(id, pcode, regionp); 
			avatar->initInstance();
			res = avatar;
		}
		break;
	}
	case LL_PCODE_LEGACY_GRASS:
	  res = new LLVOGrass(id, pcode, regionp); break;
	case LL_PCODE_LEGACY_PART_SYS:
// 	  llwarns << "Creating old part sys!" << llendl;
// 	  res = new LLVOPart(id, pcode, regionp); break;
	  res = NULL; break;
	case LL_PCODE_LEGACY_TREE:
	  res = new LLVOTree(id, pcode, regionp); break;
	case LL_PCODE_TREE_NEW:
// 	  llwarns << "Creating new tree!" << llendl;
// 	  res = new LLVOTree(id, pcode, regionp); break;
	  res = NULL; break;
	case LL_VO_SURFACE_PATCH:
	  res = new LLVOSurfacePatch(id, pcode, regionp); break;
	case LL_VO_SKY:
	  res = new LLVOSky(id, pcode, regionp); break;
	case LL_VO_VOID_WATER:
		res = new LLVOVoidWater(id, pcode, regionp); break;
	case LL_VO_WATER:
		res = new LLVOWater(id, pcode, regionp); break;
	case LL_VO_GROUND:
	  res = new LLVOGround(id, pcode, regionp); break;
	case LL_VO_PART_GROUP:
	  res = new LLVOPartGroup(id, pcode, regionp); break;
	case LL_VO_HUD_PART_GROUP:
	  res = new LLVOHUDPartGroup(id, pcode, regionp); break;
	case LL_VO_WL_SKY:
	  res = new LLVOWLSky(id, pcode, regionp); break;
	default:
	  llwarns << "Unknown object pcode " << (S32)pcode << llendl;
	  res = NULL; break;
	}
	return res;
}

LLViewerObject::LLViewerObject(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp, BOOL is_global)
:	LLPrimitive(),
	mChildList(),
	mID(id),
	mLocalID(0),
	mTotalCRC(0),
	mTEImages(NULL),
	mGLName(0),
	mbCanSelect(TRUE),
	mFlags(0),
	mPhysicsShapeType(0),
	mPhysicsGravity(0),
	mPhysicsFriction(0),
	mPhysicsDensity(0),
	mPhysicsRestitution(0),
	mDrawable(),
	mCreateSelected(FALSE),
	mRenderMedia(FALSE),
	mBestUpdatePrecision(0),
	mText(),
	mLastInterpUpdateSecs(0.f),
	mLastMessageUpdateSecs(0.f),
	mLatestRecvPacketID(0),
	mData(NULL),
	mAudioSourcep(NULL),
	mAudioGain(1.f),
	mAppAngle(0.f),
	mPixelArea(1024.f),
	mInventory(NULL),
	mInventorySerialNum(0),
	mRegionp( regionp ),
	mInventoryPending(FALSE),
	mInventoryDirty(FALSE),
	mDead(FALSE),
	mOrphaned(FALSE),
	mUserSelected(FALSE),
	mOnActiveList(FALSE),
	mOnMap(FALSE),
	mStatic(FALSE),
	mNumFaces(0),
	mTimeDilation(1.f),
	mRotTime(0.f),
	mJointInfo(NULL),
	mState(0),
	mMedia(NULL),
	mClickAction(0),
	mObjectCost(0),
	mLinksetCost(0),
	mPhysicsCost(0),
	mLinksetPhysicsCost(0.f),
	mCostStale(true),
	mPhysicsShapeUnknown(true),
	mAttachmentItemID(LLUUID::null),
	mLastUpdateType(OUT_UNKNOWN),
	mLastUpdateCached(FALSE)
{
	if (!is_global)
	{
		llassert(mRegionp);
	}

	LLPrimitive::init_primitive(pcode);

	// CP: added 12/2/2005 - this was being initialised to 0, not the current frame time
	mLastInterpUpdateSecs = LLFrameTimer::getElapsedSeconds();

	mPositionRegion = LLVector3(0.f, 0.f, 0.f);

	if (!is_global && mRegionp)
	{
		mPositionAgent = mRegionp->getOriginAgent();
	}

	LLViewerObject::sNumObjects++;
}

LLViewerObject::~LLViewerObject()
{
	deleteTEImages();

	if(mInventory)
	{
		mInventory->clear();  // will deref and delete entries
		delete mInventory;
		mInventory = NULL;
	}

	if (mJointInfo)
	{
		delete mJointInfo;
		mJointInfo = NULL;
	}

	if (mPartSourcep)
	{
		mPartSourcep->setDead();
		mPartSourcep = NULL;
	}

	// Delete memory associated with extra parameters.
	std::map<U16, ExtraParameter*>::iterator iter;
	for (iter = mExtraParameterList.begin(); iter != mExtraParameterList.end(); ++iter)
	{
		if(iter->second != NULL)
		{
			delete iter->second->data;
			delete iter->second;
		}
	}
	mExtraParameterList.clear();

	for_each(mNameValuePairs.begin(), mNameValuePairs.end(), DeletePairedPointer()) ;
	mNameValuePairs.clear();
	
	delete[] mData;
	mData = NULL;

	delete mMedia;
	mMedia = NULL;

	sNumObjects--;
	sNumZombieObjects--;
	llassert(mChildList.size() == 0);

	clearInventoryListeners();
}

void LLViewerObject::deleteTEImages()
{
	delete[] mTEImages;
	mTEImages = NULL;
}

void LLViewerObject::markDead()
{
	if (!mDead)
	{
		//llinfos << "Marking self " << mLocalID << " as dead." << llendl;
		
		// Root object of this hierarchy unlinks itself.
		if (getParent())
		{
			((LLViewerObject *)getParent())->removeChild(this);
			// go ahead and delete any jointinfo's that we find
			delete mJointInfo;
			mJointInfo = NULL;
		}

		// Mark itself as dead
		mDead = TRUE;
		gObjectList.cleanupReferences(this);

		LLViewerObject *childp;
		while (mChildList.size() > 0)
		{
			childp = mChildList.back();
			if (childp->getPCode() != LL_PCODE_LEGACY_AVATAR)
			{
				//llinfos << "Marking child " << childp->getLocalID() << " as dead." << llendl;
				childp->setParent(NULL); // LLViewerObject::markDead 1
				childp->markDead();
			}
			else
			{
				// make sure avatar is no longer parented, 
				// so we can properly set it's position
				childp->setDrawableParent(NULL);
				((LLVOAvatar*)childp)->getOffObject();
				childp->setParent(NULL); // LLViewerObject::markDead 2
			}
			mChildList.pop_back();
		}

		if (mDrawable.notNull())
		{
			// Drawables are reference counted, mark as dead, then nuke the pointer.
			mDrawable->markDead();
			mDrawable = NULL;
		}

		if (mText)
		{
			mText->markDead();
			mText = NULL;
		}

		if (mIcon)
		{
			mIcon->markDead();
			mIcon = NULL;
		}

		if (mPartSourcep)
		{
			mPartSourcep->setDead();
			mPartSourcep = NULL;
		}

		if (mAudioSourcep)
		{
			// Do some cleanup
			if (gAudiop)
			{
				gAudiop->cleanupAudioSource(mAudioSourcep);
			}
			mAudioSourcep = NULL;
		}

		if (flagAnimSource())
		{
			if (isAgentAvatarValid())
			{
				// stop motions associated with this object
				gAgentAvatarp->stopMotionFromSource(mID);
			}
		}

		if (flagCameraSource())
		{
			LLFollowCamMgr::removeFollowCamParams(mID);
		}

		sNumZombieObjects++;
	}
}

void LLViewerObject::dump() const
{
	llinfos << "Type: " << pCodeToString(mPrimitiveCode) << llendl;
	llinfos << "Drawable: " << (LLDrawable *)mDrawable << llendl;
	llinfos << "Update Age: " << LLFrameTimer::getElapsedSeconds() - mLastMessageUpdateSecs << llendl;

	llinfos << "Parent: " << getParent() << llendl;
	llinfos << "ID: " << mID << llendl;
	llinfos << "LocalID: " << mLocalID << llendl;
	llinfos << "PositionRegion: " << getPositionRegion() << llendl;
	llinfos << "PositionAgent: " << getPositionAgent() << llendl;
	llinfos << "PositionGlobal: " << getPositionGlobal() << llendl;
	llinfos << "Velocity: " << getVelocity() << llendl;
	if (mDrawable.notNull() && mDrawable->getNumFaces())
	{
		LLFacePool *poolp = mDrawable->getFace(0)->getPool();
		if (poolp)
		{
			llinfos << "Pool: " << poolp << llendl;
			llinfos << "Pool reference count: " << poolp->mReferences.size() << llendl;
		}
	}
	//llinfos << "BoxTree Min: " << mDrawable->getBox()->getMin() << llendl;
	//llinfos << "BoxTree Max: " << mDrawable->getBox()->getMin() << llendl;
	/*
	llinfos << "Velocity: " << getVelocity() << llendl;
	llinfos << "AnyOwner: " << permAnyOwner() << " YouOwner: " << permYouOwner() << " Edit: " << mPermEdit << llendl;
	llinfos << "UsePhysics: " << usePhysics() << " CanSelect " << mbCanSelect << " UserSelected " << mUserSelected << llendl;
	llinfos << "AppAngle: " << mAppAngle << llendl;
	llinfos << "PixelArea: " << mPixelArea << llendl;

	char buffer[1000];
	char *key;
	for (key = mNameValuePairs.getFirstKey(); key; key = mNameValuePairs.getNextKey() )
	{
		mNameValuePairs[key]->printNameValue(buffer);
		llinfos << buffer << llendl;
	}
	for (child_list_t::iterator iter = mChildList.begin();
		 iter != mChildList.end(); iter++)
	{
		LLViewerObject* child = *iter;
		llinfos << "  child " << child->getID() << llendl;
	}
	*/
}

void LLViewerObject::printNameValuePairs() const
{
	for (name_value_map_t::const_iterator iter = mNameValuePairs.begin();
		 iter != mNameValuePairs.end(); iter++)
	{
		LLNameValue* nv = iter->second;
		llinfos << nv->printNameValue() << llendl;
	}
}

void LLViewerObject::initVOClasses()
{
	// Initialized shared class stuff first.
	LLVOAvatar::initClass();
	LLVOTree::initClass();
	llinfos << "Viewer Object size: " << sizeof(LLViewerObject) << llendl;
	LLVOGrass::initClass();
	LLVOWater::initClass();
	LLVOVolume::initClass();
}

void LLViewerObject::cleanupVOClasses()
{
	LLVOGrass::cleanupClass();
	LLVOWater::cleanupClass();
	LLVOTree::cleanupClass();
	LLVOAvatar::cleanupClass();
	LLVOVolume::cleanupClass();
}

// Replaces all name value pairs with data from \n delimited list
// Does not update server
void LLViewerObject::setNameValueList(const std::string& name_value_list)
{
	// Clear out the old
	for_each(mNameValuePairs.begin(), mNameValuePairs.end(), DeletePairedPointer()) ;
	mNameValuePairs.clear();

	// Bring in the new
	std::string::size_type length = name_value_list.length();
	std::string::size_type start = 0;
	while (start < length)
	{
		std::string::size_type end = name_value_list.find_first_of("\n", start);
		if (end == std::string::npos) end = length;
		if (end > start)
		{
			std::string tok = name_value_list.substr(start, end - start);
			addNVPair(tok);
		}
		start = end+1;
	}
}

// This method returns true if the object is over land owned by the
// agent.
bool LLViewerObject::isReturnable()
{
	if (isAttachment())
	{
		return false;
	}
		
	std::vector<LLBBox> boxes;
	boxes.push_back(LLBBox(getPositionRegion(), getRotationRegion(), getScale() * -0.5f, getScale() * 0.5f).getAxisAligned());
	for (child_list_t::iterator iter = mChildList.begin();
		 iter != mChildList.end(); iter++)
	{
		LLViewerObject* child = *iter;
		boxes.push_back( LLBBox(child->getPositionRegion(), child->getRotationRegion(), child->getScale() * -0.5f, child->getScale() * 0.5f).getAxisAligned());
	}

	bool result = (mRegionp && mRegionp->objectIsReturnable(getPositionRegion(), boxes)) ? 1 : 0;
	
	if ( !result )
	{		
		//Get list of neighboring regions relative to this vo's region
		std::vector<LLViewerRegion*> uniqueRegions;
		mRegionp->getNeighboringRegions( uniqueRegions );
	
		//Build aabb's - for root and all children
		std::vector<PotentialReturnableObject> returnables;
		typedef std::vector<LLViewerRegion*>::iterator RegionIt;
		RegionIt regionStart = uniqueRegions.begin();
		RegionIt regionEnd   = uniqueRegions.end();
		
		for (; regionStart != regionEnd; ++regionStart )
		{
			LLViewerRegion* pTargetRegion = *regionStart;
			//Add the root vo as there may be no children and we still want
			//to test for any edge overlap
			buildReturnablesForChildrenVO( returnables, this, pTargetRegion );
			//Add it's children
			for (child_list_t::iterator iter = mChildList.begin();  iter != mChildList.end(); iter++)
			{
				LLViewerObject* pChild = *iter;		
				buildReturnablesForChildrenVO( returnables, pChild, pTargetRegion );
			}
		}	
	
		//TBD#Eventually create a region -> box list map 
		typedef std::vector<PotentialReturnableObject>::iterator ReturnablesIt;
		ReturnablesIt retCurrentIt = returnables.begin();
		ReturnablesIt retEndIt = returnables.end();
	
		for ( ; retCurrentIt !=retEndIt; ++retCurrentIt )
		{
			boxes.clear();
			LLViewerRegion* pRegion = (*retCurrentIt).pRegion;
			boxes.push_back( (*retCurrentIt).box );	
			bool retResult = 	pRegion
							 && pRegion->childrenObjectReturnable( boxes )
							 && pRegion->canManageEstate();
			if ( retResult )
			{ 
				result = true;
				break;
			}
		}
	}
	return result;
}

void LLViewerObject::buildReturnablesForChildrenVO( std::vector<PotentialReturnableObject>& returnables, LLViewerObject* pChild, LLViewerRegion* pTargetRegion )
{
	if ( !pChild )
	{
		llerrs<<"child viewerobject is NULL "<<llendl;
	}
	
	constructAndAddReturnable( returnables, pChild, pTargetRegion );
	
	//We want to handle any children VO's as well
	for (child_list_t::iterator iter = pChild->mChildList.begin();  iter != pChild->mChildList.end(); iter++)
	{
		LLViewerObject* pChildofChild = *iter;
		buildReturnablesForChildrenVO( returnables, pChildofChild, pTargetRegion );
	}
}

void LLViewerObject::constructAndAddReturnable( std::vector<PotentialReturnableObject>& returnables, LLViewerObject* pChild, LLViewerRegion* pTargetRegion )
{
	
	LLVector3 targetRegionPos;
	targetRegionPos.setVec( pChild->getPositionGlobal() );	
	
	LLBBox childBBox = LLBBox( targetRegionPos, pChild->getRotationRegion(), pChild->getScale() * -0.5f, 
							    pChild->getScale() * 0.5f).getAxisAligned();
	
	LLVector3 edgeA = targetRegionPos + childBBox.getMinLocal();
	LLVector3 edgeB = targetRegionPos + childBBox.getMaxLocal();
	
	LLVector3d edgeAd, edgeBd;
	edgeAd.setVec(edgeA);
	edgeBd.setVec(edgeB);
	
	//Only add the box when either of the extents are in a neighboring region
	if ( pTargetRegion->pointInRegionGlobal( edgeAd ) || pTargetRegion->pointInRegionGlobal( edgeBd ) )
	{
		PotentialReturnableObject returnableObj;
		returnableObj.box		= childBBox;
		returnableObj.pRegion	= pTargetRegion;
		returnables.push_back( returnableObj );
	}
}

bool LLViewerObject::crossesParcelBounds()
{
	std::vector<LLBBox> boxes;
	boxes.push_back(LLBBox(getPositionRegion(), getRotationRegion(), getScale() * -0.5f, getScale() * 0.5f).getAxisAligned());
	for (child_list_t::iterator iter = mChildList.begin();
		 iter != mChildList.end(); iter++)
	{
		LLViewerObject* child = *iter;
		boxes.push_back(LLBBox(child->getPositionRegion(), child->getRotationRegion(), child->getScale() * -0.5f, child->getScale() * 0.5f).getAxisAligned());
	}

	return mRegionp && mRegionp->objectsCrossParcel(boxes);
}

BOOL LLViewerObject::setParent(LLViewerObject* parent)
{
	if(mParent != parent)
	{
		LLViewerObject* old_parent = (LLViewerObject*)mParent ;		
		BOOL ret = LLPrimitive::setParent(parent);
		if(ret && old_parent && parent)
		{
			old_parent->removeChild(this) ;
		}
		return ret ;
	}

	return FALSE ;
}

void LLViewerObject::addChild(LLViewerObject *childp)
{
	for (child_list_t::iterator i = mChildList.begin(); i != mChildList.end(); ++i)
	{
		if (*i == childp)
		{	//already has child
			return;
		}
	}
	
	if (!isAvatar())
	{
		// propagate selection properties
		childp->mbCanSelect = mbCanSelect;
	}

	if(childp->setParent(this))
	{
		mChildList.push_back(childp);
	}
}

void LLViewerObject::removeChild(LLViewerObject *childp)
{
	for (child_list_t::iterator i = mChildList.begin(); i != mChildList.end(); ++i)
	{
		if (*i == childp)
		{
			if (!childp->isAvatar() && mDrawable.notNull() && mDrawable->isActive() && childp->mDrawable.notNull() && !isAvatar())
			{
				gPipeline.markRebuild(childp->mDrawable, LLDrawable::REBUILD_VOLUME);
			}

			mChildList.erase(i);

			if(childp->getParent() == this)
			{
				childp->setParent(NULL);			
			}
			break;
		}
	}
	
	if (childp->isSelected())
	{
		LLSelectMgr::getInstance()->deselectObjectAndFamily(childp);
		BOOL add_to_end = TRUE;
		LLSelectMgr::getInstance()->selectObjectAndFamily(childp, add_to_end);
	}
}

void LLViewerObject::addThisAndAllChildren(std::vector<LLViewerObject*>& objects)
{
	objects.push_back(this);
	for (child_list_t::iterator iter = mChildList.begin();
		 iter != mChildList.end(); iter++)
	{
		LLViewerObject* child = *iter;
		if (!child->isAvatar())
		{
			child->addThisAndAllChildren(objects);
		}
	}
}

void LLViewerObject::addThisAndNonJointChildren(std::vector<LLViewerObject*>& objects)
{
	objects.push_back(this);
	// don't add any attachments when temporarily selecting avatar
	if (isAvatar())
	{
		return;
	}
	for (child_list_t::iterator iter = mChildList.begin();
		 iter != mChildList.end(); iter++)
	{
		LLViewerObject* child = *iter;
		if ( (!child->isAvatar()) && (!child->isJointChild()))
		{
			child->addThisAndNonJointChildren(objects);
		}
	}
}

BOOL LLViewerObject::isChild(LLViewerObject *childp) const
{
	for (child_list_t::const_iterator iter = mChildList.begin();
		 iter != mChildList.end(); iter++)
	{
		LLViewerObject* testchild = *iter;
		if (testchild == childp)
			return TRUE;
	}
	return FALSE;
}


// returns TRUE if at least one avatar is sitting on this object
BOOL LLViewerObject::isSeat() const
{
	for (child_list_t::const_iterator iter = mChildList.begin();
		 iter != mChildList.end(); iter++)
	{
		LLViewerObject* child = *iter;
		if (child->isAvatar())
		{
			return TRUE;
		}
	}
	return FALSE;

}

BOOL LLViewerObject::setDrawableParent(LLDrawable* parentp)
{
	if (mDrawable.isNull())
	{
		return FALSE;
	}

	BOOL ret = mDrawable->mXform.setParent(parentp ? &parentp->mXform : NULL);
	if(!ret)
	{
		return FALSE ;
	}
	LLDrawable* old_parent = mDrawable->mParent;
	mDrawable->mParent = parentp; 
		
	gPipeline.markRebuild(mDrawable, LLDrawable::REBUILD_VOLUME, TRUE);
	if(	(old_parent != parentp && old_parent)
		|| (parentp && parentp->isActive()))
	{
		// *TODO we should not be relying on setDrawable parent to call markMoved
		gPipeline.markMoved(mDrawable, FALSE);
	}
	else if (!mDrawable->isAvatar())
	{
		mDrawable->updateXform(TRUE);
		/*if (!mDrawable->getSpatialGroup())
		{
			mDrawable->movePartition();
		}*/
	}
	
	return ret;
}

// Show or hide particles, icon and HUD
void LLViewerObject::hideExtraDisplayItems( BOOL hidden )
{
	if( mPartSourcep.notNull() )
	{
		LLViewerPartSourceScript *partSourceScript = mPartSourcep.get();
		partSourceScript->setSuspended( hidden );
	}

	if( mText.notNull() )
	{
		LLHUDText *hudText = mText.get();
		hudText->setHidden( hidden );
	}

	if( mIcon.notNull() )
	{
		LLHUDIcon *hudIcon = mIcon.get();
		hudIcon->setHidden( hidden );
	}
}

U32 LLViewerObject::checkMediaURL(const std::string &media_url)
{
    U32 retval = (U32)0x0;
    if (!mMedia && !media_url.empty())
    {
        retval |= MEDIA_URL_ADDED;
        mMedia = new LLViewerObjectMedia;
        mMedia->mMediaURL = media_url;
        mMedia->mMediaType = LLViewerObject::MEDIA_SET;
        mMedia->mPassedWhitelist = FALSE;
    }
    else if (mMedia)
    {
        if (media_url.empty())
        {
            retval |= MEDIA_URL_REMOVED;
            delete mMedia;
            mMedia = NULL;
        }
        else if (mMedia->mMediaURL != media_url) // <-- This is an optimization.  If they are equal don't bother with below's test.
        {
            /*if (! (LLTextureEntry::getAgentIDFromMediaVersionString(media_url) == gAgent.getID() &&
                   LLTextureEntry::getVersionFromMediaVersionString(media_url) == 
                        LLTextureEntry::getVersionFromMediaVersionString(mMedia->mMediaURL) + 1))
			*/
            {
                // If the media URL is different and WE were not the one who
                // changed it, mark dirty.
                retval |= MEDIA_URL_UPDATED;
            }
            mMedia->mMediaURL = media_url;
            mMedia->mPassedWhitelist = FALSE;
        }
    }
    return retval;
}

U32 LLViewerObject::processUpdateMessage(LLMessageSystem *mesgsys,
					 void **user_data,
					 U32 block_num,
					 const EObjectUpdateType update_type,
					 LLDataPacker *dp)
{
	LLMemType mt(LLMemType::MTYPE_OBJECT);
	U32 retval = 0x0;
	
	// Coordinates of objects on simulators are region-local.
	U64 region_handle;
	mesgsys->getU64Fast(_PREHASH_RegionData, _PREHASH_RegionHandle, region_handle);
	
	{
		LLViewerRegion* regionp = LLWorld::getInstance()->getRegionFromHandle(region_handle);
		if(regionp != mRegionp && regionp && mRegionp)//region cross
		{
			//this is the redundant position and region update, but it is necessary in case the viewer misses the following 
			//position and region update messages from sim.
			//this redundant update should not cause any problems.
			LLVector3 delta_pos =  mRegionp->getOriginAgent() - regionp->getOriginAgent();
			setPositionParent(getPosition() + delta_pos); //update to the new region position immediately.
			setRegion(regionp) ; //change the region.
		}
		else
		{
			mRegionp = regionp ;
		}
	}	
	
	if (!mRegionp)
	{
		U32 x, y;
		from_region_handle(region_handle, &x, &y);

		llerrs << "Object has invalid region " << x << ":" << y << "!" << llendl;
		return retval;
	}

	U16 time_dilation16;
	mesgsys->getU16Fast(_PREHASH_RegionData, _PREHASH_TimeDilation, time_dilation16);
	F32 time_dilation = ((F32) time_dilation16) / 65535.f;
	mTimeDilation = time_dilation;
	mRegionp->setTimeDilation(time_dilation);

	// this will be used to determine if we've really changed position
	// Use getPosition, not getPositionRegion, since this is what we're comparing directly against.
	LLVector3 test_pos_parent = getPosition();

	U8  data[60+16]; // This needs to match the largest size below.
#ifdef LL_BIG_ENDIAN
	U16 valswizzle[4];
#endif
	U16	*val;
	const F32 size = LLWorld::getInstance()->getRegionWidthInMeters();	
	const F32 MAX_HEIGHT = LLWorld::getInstance()->getRegionMaxHeight();
	const F32 MIN_HEIGHT = LLWorld::getInstance()->getRegionMinHeight();
	S32 length;
	S32	count;
	S32 this_update_precision = 32;		// in bits

	// Temporaries, because we need to compare w/ previous to set dirty flags...
	LLVector3 new_pos_parent;
	LLVector3 new_vel;
	LLVector3 new_acc;
	LLVector3 new_angv;
	LLVector3 old_angv = getAngularVelocity();
	LLQuaternion new_rot;
	LLVector3 new_scale = getScale();

	U32	parent_id = 0;
	U8	material = 0;
	U8 click_action = 0;
	U32 crc = 0;

	bool old_special_hover_cursor = specialHoverCursor();

	LLViewerObject *cur_parentp = (LLViewerObject *)getParent();

	if (cur_parentp)
	{
		parent_id = cur_parentp->mLocalID;
	}

	if (!dp)
	{
		switch(update_type)
		{
		case OUT_FULL:
			{
#ifdef DEBUG_UPDATE_TYPE
				llinfos << "Full:" << getID() << llendl;
#endif
				//clear cost and linkset cost
				mCostStale = true;
				if (isSelected())
				{
					gFloaterTools->dirty();
				}

				LLUUID audio_uuid;
				LLUUID owner_id;	// only valid if audio_uuid or particle system is not null
				F32    gain;
				U8     sound_flags;

				mesgsys->getU32Fast( _PREHASH_ObjectData, _PREHASH_CRC, crc, block_num);
				mesgsys->getU32Fast( _PREHASH_ObjectData, _PREHASH_ParentID, parent_id, block_num);
				mesgsys->getUUIDFast(_PREHASH_ObjectData, _PREHASH_Sound, audio_uuid, block_num );
				// HACK: Owner id only valid if non-null sound id or particle system
				mesgsys->getUUIDFast(_PREHASH_ObjectData, _PREHASH_OwnerID, owner_id, block_num );
				mesgsys->getF32Fast( _PREHASH_ObjectData, _PREHASH_Gain, gain, block_num );
				mesgsys->getU8Fast(  _PREHASH_ObjectData, _PREHASH_Flags, sound_flags, block_num );
				mesgsys->getU8Fast(  _PREHASH_ObjectData, _PREHASH_Material, material, block_num );
				mesgsys->getU8Fast(  _PREHASH_ObjectData, _PREHASH_ClickAction, click_action, block_num); 
				mesgsys->getVector3Fast(_PREHASH_ObjectData, _PREHASH_Scale, new_scale, block_num );
				length = mesgsys->getSizeFast(_PREHASH_ObjectData, block_num, _PREHASH_ObjectData);
				mesgsys->getBinaryDataFast(_PREHASH_ObjectData, _PREHASH_ObjectData, data, length, block_num);

				mTotalCRC = crc;

				// Owner ID used for sound muting or particle system muting
				setAttachedSound(audio_uuid, owner_id, gain, sound_flags);

				U8 old_material = getMaterial();
				if (old_material != material)
				{
					setMaterial(material);
					if (mDrawable.notNull())
					{
						gPipeline.markMoved(mDrawable, FALSE); // undamped
					}
				}
				setClickAction(click_action);

				count = 0;
				LLVector4 collision_plane;
				
				switch(length)
				{
				case (60 + 16):
					// pull out collision normal for avatar
					htonmemcpy(collision_plane.mV, &data[count], MVT_LLVector4, sizeof(LLVector4));
					((LLVOAvatar*)this)->setFootPlane(collision_plane);
					count += sizeof(LLVector4);
					// fall through
				case 60:
					this_update_precision = 32;
					// this is a terse update
					// pos
					htonmemcpy(new_pos_parent.mV, &data[count], MVT_LLVector3, sizeof(LLVector3));
					count += sizeof(LLVector3);
					// vel
					htonmemcpy((void*)getVelocity().mV, &data[count], MVT_LLVector3, sizeof(LLVector3));
					count += sizeof(LLVector3);
					// acc
					htonmemcpy((void*)getAcceleration().mV, &data[count], MVT_LLVector3, sizeof(LLVector3));
					count += sizeof(LLVector3);
					// theta
					{
						LLVector3 vec;
						htonmemcpy(vec.mV, &data[count], MVT_LLVector3, sizeof(LLVector3));
						new_rot.unpackFromVector3(vec);
					}
					count += sizeof(LLVector3);
					// omega
					htonmemcpy((void*)new_angv.mV, &data[count], MVT_LLVector3, sizeof(LLVector3));
					if (new_angv.isExactlyZero())
					{
						// reset rotation time
						resetRot();
					}
					setAngularVelocity(new_angv);
#if LL_DARWIN
					if (length == 76)
					{
						setAngularVelocity(LLVector3::zero);
					}
#endif
					break;
				case(32 + 16):
					// pull out collision normal for avatar
					htonmemcpy(collision_plane.mV, &data[count], MVT_LLVector4, sizeof(LLVector4));
					((LLVOAvatar*)this)->setFootPlane(collision_plane);
					count += sizeof(LLVector4);
					// fall through
				case 32:
					this_update_precision = 16;
					test_pos_parent.quantize16(-0.5f*size, 1.5f*size, MIN_HEIGHT, MAX_HEIGHT);

					// This is a terse 16 update, so treat data as an array of U16's.
#ifdef LL_BIG_ENDIAN
					htonmemcpy(valswizzle, &data[count], MVT_U16Vec3, 6); 
					val = valswizzle;
#else
					val = (U16 *) &data[count];
#endif
					count += sizeof(U16)*3;
					new_pos_parent.mV[VX] = U16_to_F32(val[VX], -0.5f*size, 1.5f*size);
					new_pos_parent.mV[VY] = U16_to_F32(val[VY], -0.5f*size, 1.5f*size);
					new_pos_parent.mV[VZ] = U16_to_F32(val[VZ], MIN_HEIGHT, MAX_HEIGHT);

#ifdef LL_BIG_ENDIAN
					htonmemcpy(valswizzle, &data[count], MVT_U16Vec3, 6); 
					val = valswizzle;
#else
					val = (U16 *) &data[count];
#endif
					count += sizeof(U16)*3;
					setVelocity(LLVector3(U16_to_F32(val[VX], -size, size),
													   U16_to_F32(val[VY], -size, size),
													   U16_to_F32(val[VZ], -size, size)));

#ifdef LL_BIG_ENDIAN
					htonmemcpy(valswizzle, &data[count], MVT_U16Vec3, 6); 
					val = valswizzle;
#else
					val = (U16 *) &data[count];
#endif
					count += sizeof(U16)*3;
					setAcceleration(LLVector3(U16_to_F32(val[VX], -size, size),
														   U16_to_F32(val[VY], -size, size),
														   U16_to_F32(val[VZ], -size, size)));

#ifdef LL_BIG_ENDIAN
					htonmemcpy(valswizzle, &data[count], MVT_U16Quat, 4); 
					val = valswizzle;
#else
					val = (U16 *) &data[count];
#endif
					count += sizeof(U16)*4;
					new_rot.mQ[VX] = U16_to_F32(val[VX], -1.f, 1.f);
					new_rot.mQ[VY] = U16_to_F32(val[VY], -1.f, 1.f);
					new_rot.mQ[VZ] = U16_to_F32(val[VZ], -1.f, 1.f);
					new_rot.mQ[VW] = U16_to_F32(val[VW], -1.f, 1.f);

#ifdef LL_BIG_ENDIAN
					htonmemcpy(valswizzle, &data[count], MVT_U16Vec3, 6); 
					val = valswizzle;
#else
					val = (U16 *) &data[count];
#endif
					new_angv.setVec(U16_to_F32(val[VX], -size, size),
										U16_to_F32(val[VY], -size, size),
										U16_to_F32(val[VZ], -size, size));
					if (new_angv.isExactlyZero())
					{
						// reset rotation time
						resetRot();
					}
					setAngularVelocity(new_angv);
					break;

				case 16:
					this_update_precision = 8;
					test_pos_parent.quantize8(-0.5f*size, 1.5f*size, MIN_HEIGHT, MAX_HEIGHT);
					// this is a terse 8 update
					new_pos_parent.mV[VX] = U8_to_F32(data[0], -0.5f*size, 1.5f*size);
					new_pos_parent.mV[VY] = U8_to_F32(data[1], -0.5f*size, 1.5f*size);
					new_pos_parent.mV[VZ] = U8_to_F32(data[2], MIN_HEIGHT, MAX_HEIGHT);

					setVelocity(U8_to_F32(data[3], -size, size),
								U8_to_F32(data[4], -size, size),
								U8_to_F32(data[5], -size, size) );

					setAcceleration(U8_to_F32(data[6], -size, size),
									U8_to_F32(data[7], -size, size),
									U8_to_F32(data[8], -size, size) );

					new_rot.mQ[VX] = U8_to_F32(data[9], -1.f, 1.f);
					new_rot.mQ[VY] = U8_to_F32(data[10], -1.f, 1.f);
					new_rot.mQ[VZ] = U8_to_F32(data[11], -1.f, 1.f);
					new_rot.mQ[VW] = U8_to_F32(data[12], -1.f, 1.f);

					new_angv.setVec(U8_to_F32(data[13], -size, size),
										U8_to_F32(data[14], -size, size),
										U8_to_F32(data[15], -size, size) );
					if (new_angv.isExactlyZero())
					{
						// reset rotation time
						resetRot();
					}
					setAngularVelocity(new_angv);
					break;
				}

				////////////////////////////////////////////////////
				//
				// Here we handle data specific to the full message.
				//

				U32 flags;
				mesgsys->getU32Fast(_PREHASH_ObjectData, _PREHASH_UpdateFlags, flags, block_num);
				// clear all but local flags
				mFlags &= FLAGS_LOCAL;
				mFlags |= flags;

				U8 state;
				mesgsys->getU8Fast(_PREHASH_ObjectData, _PREHASH_State, state, block_num );
				mState = state;

				// ...new objects that should come in selected need to be added to the selected list
				mCreateSelected = ((flags & FLAGS_CREATE_SELECTED) != 0);

				// Set all name value pairs
				S32 nv_size = mesgsys->getSizeFast(_PREHASH_ObjectData, block_num, _PREHASH_NameValue);
				if (nv_size > 0)
				{
					std::string name_value_list;
					mesgsys->getStringFast(_PREHASH_ObjectData, _PREHASH_NameValue, name_value_list, block_num);
					setNameValueList(name_value_list);
				}

				// Clear out any existing generic data
				if (mData)
				{
					delete [] mData;
				}

				// Check for appended generic data
				S32 data_size = mesgsys->getSizeFast(_PREHASH_ObjectData, block_num, _PREHASH_Data);
				if (data_size <= 0)
				{
					mData = NULL;
				}
				else
				{
					// ...has generic data
					mData = new U8[data_size];
					mesgsys->getBinaryDataFast(_PREHASH_ObjectData, _PREHASH_Data, mData, data_size, block_num);
				}

				S32 text_size = mesgsys->getSizeFast(_PREHASH_ObjectData, block_num, _PREHASH_Text);
				if (text_size > 1)
				{
					// Setup object text
					if (!mText)
					{
						mText = (LLHUDText *)LLHUDObject::addHUDObject(LLHUDObject::LL_HUD_TEXT);
						mText->setFont(LLFontGL::getFontSansSerif());
						mText->setVertAlignment(LLHUDText::ALIGN_VERT_TOP);
						mText->setMaxLines(-1);
						mText->setSourceObject(this);
						mText->setOnHUDAttachment(isHUDAttachment());
					}

					std::string temp_string;
					mesgsys->getStringFast(_PREHASH_ObjectData, _PREHASH_Text, temp_string, block_num );
					
					LLColor4U coloru;
					mesgsys->getBinaryDataFast(_PREHASH_ObjectData, _PREHASH_TextColor, coloru.mV, 4, block_num);

					// alpha was flipped so that it zero encoded better
					coloru.mV[3] = 255 - coloru.mV[3];
					mText->setColor(LLColor4(coloru));
					mText->setString(temp_string);
					
					if (mDrawable.notNull())
					{
						setChanged(MOVED | SILHOUETTE);
						gPipeline.markMoved(mDrawable, FALSE); // undamped
					}
				}
				else if (mText.notNull())
				{
					mText->markDead();
					mText = NULL;
				}

				std::string media_url;
				mesgsys->getStringFast(_PREHASH_ObjectData, _PREHASH_MediaURL, media_url, block_num);
                retval |= checkMediaURL(media_url);
                
				//
				// Unpack particle system data
				//
				unpackParticleSource(block_num, owner_id);

				// Mark all extra parameters not used
				std::map<U16, ExtraParameter*>::iterator iter;
				for (iter = mExtraParameterList.begin(); iter != mExtraParameterList.end(); ++iter)
				{
					iter->second->in_use = FALSE;
				}

				// Unpack extra parameters
				S32 size = mesgsys->getSizeFast(_PREHASH_ObjectData, block_num, _PREHASH_ExtraParams);
				if (size > 0)
				{
					U8 *buffer = new U8[size];
					mesgsys->getBinaryDataFast(_PREHASH_ObjectData, _PREHASH_ExtraParams, buffer, size, block_num);
					LLDataPackerBinaryBuffer dp(buffer, size);

					U8 num_parameters;
					dp.unpackU8(num_parameters, "num_params");
					U8 param_block[MAX_OBJECT_PARAMS_SIZE];
					for (U8 param=0; param<num_parameters; ++param)
					{
						U16 param_type;
						S32 param_size;
						dp.unpackU16(param_type, "param_type");
						dp.unpackBinaryData(param_block, param_size, "param_data");
						//llinfos << "Param type: " << param_type << ", Size: " << param_size << llendl;
						LLDataPackerBinaryBuffer dp2(param_block, param_size);
						unpackParameterEntry(param_type, &dp2);
					}
					delete[] buffer;
				}

				for (iter = mExtraParameterList.begin(); iter != mExtraParameterList.end(); ++iter)
				{
					if (!iter->second->in_use)
					{
						// Send an update message in case it was formerly in use
						parameterChanged(iter->first, iter->second->data, FALSE, false);
					}
				}

				U8 joint_type = 0;
				mesgsys->getU8Fast(_PREHASH_ObjectData, _PREHASH_JointType, joint_type, block_num);
				if (joint_type)
				{
					// create new joint info 
					if (!mJointInfo)
					{
						mJointInfo = new LLVOJointInfo;
					}
					mJointInfo->mJointType = (EHavokJointType) joint_type;
					mesgsys->getVector3Fast(_PREHASH_ObjectData, _PREHASH_JointPivot, mJointInfo->mPivot, block_num);
					mesgsys->getVector3Fast(_PREHASH_ObjectData, _PREHASH_JointAxisOrAnchor, mJointInfo->mAxisOrAnchor, block_num);
				}
				else if (mJointInfo)
				{
					// this joint info is no longer needed
					delete mJointInfo;
					mJointInfo = NULL;
				}

				break;
			}

		case OUT_TERSE_IMPROVED:
			{
#ifdef DEBUG_UPDATE_TYPE
				llinfos << "TI:" << getID() << llendl;
#endif
				length = mesgsys->getSizeFast(_PREHASH_ObjectData, block_num, _PREHASH_ObjectData);
				mesgsys->getBinaryDataFast(_PREHASH_ObjectData, _PREHASH_ObjectData, data, length, block_num);
				count = 0;
				LLVector4 collision_plane;
				
				switch(length)
				{
				case(60 + 16):
					// pull out collision normal for avatar
					htonmemcpy(collision_plane.mV, &data[count], MVT_LLVector4, sizeof(LLVector4));
					((LLVOAvatar*)this)->setFootPlane(collision_plane);
					count += sizeof(LLVector4);
					// fall through
				case 60:
					// this is a terse 32 update
					// pos
					this_update_precision = 32;
					htonmemcpy(new_pos_parent.mV, &data[count], MVT_LLVector3, sizeof(LLVector3));
					count += sizeof(LLVector3);
					// vel
					htonmemcpy((void*)getVelocity().mV, &data[count], MVT_LLVector3, sizeof(LLVector3));
					count += sizeof(LLVector3);
					// acc
					htonmemcpy((void*)getAcceleration().mV, &data[count], MVT_LLVector3, sizeof(LLVector3));
					count += sizeof(LLVector3);
					// theta
					{
						LLVector3 vec;
						htonmemcpy(vec.mV, &data[count], MVT_LLVector3, sizeof(LLVector3));
						new_rot.unpackFromVector3(vec);
					}
					count += sizeof(LLVector3);
					// omega
					htonmemcpy((void*)new_angv.mV, &data[count], MVT_LLVector3, sizeof(LLVector3));
					if (new_angv.isExactlyZero())
					{
						// reset rotation time
						resetRot();
					}
					setAngularVelocity(new_angv);
#if LL_DARWIN
					if (length == 76)
					{
						setAngularVelocity(LLVector3::zero);
					}
#endif
					break;
				case(32 + 16):
					// pull out collision normal for avatar
					htonmemcpy(collision_plane.mV, &data[count], MVT_LLVector4, sizeof(LLVector4));
					((LLVOAvatar*)this)->setFootPlane(collision_plane);
					count += sizeof(LLVector4);
					// fall through
				case 32:
					// this is a terse 16 update
					this_update_precision = 16;
					test_pos_parent.quantize16(-0.5f*size, 1.5f*size, MIN_HEIGHT, MAX_HEIGHT);

#ifdef LL_BIG_ENDIAN
					htonmemcpy(valswizzle, &data[count], MVT_U16Vec3, 6); 
					val = valswizzle;
#else
					val = (U16 *) &data[count];
#endif
					count += sizeof(U16)*3;
					new_pos_parent.mV[VX] = U16_to_F32(val[VX], -0.5f*size, 1.5f*size);
					new_pos_parent.mV[VY] = U16_to_F32(val[VY], -0.5f*size, 1.5f*size);
					new_pos_parent.mV[VZ] = U16_to_F32(val[VZ], MIN_HEIGHT, MAX_HEIGHT);

#ifdef LL_BIG_ENDIAN
					htonmemcpy(valswizzle, &data[count], MVT_U16Vec3, 6); 
					val = valswizzle;
#else
					val = (U16 *) &data[count];
#endif
					count += sizeof(U16)*3;
					setVelocity(U16_to_F32(val[VX], -size, size),
								U16_to_F32(val[VY], -size, size),
								U16_to_F32(val[VZ], -size, size));

#ifdef LL_BIG_ENDIAN
					htonmemcpy(valswizzle, &data[count], MVT_U16Vec3, 6); 
					val = valswizzle;
#else
					val = (U16 *) &data[count];
#endif
					count += sizeof(U16)*3;
					setAcceleration(U16_to_F32(val[VX], -size, size),
									U16_to_F32(val[VY], -size, size),
									U16_to_F32(val[VZ], -size, size));

#ifdef LL_BIG_ENDIAN
					htonmemcpy(valswizzle, &data[count], MVT_U16Quat, 8); 
					val = valswizzle;
#else
					val = (U16 *) &data[count];
#endif
					count += sizeof(U16)*4;
					new_rot.mQ[VX] = U16_to_F32(val[VX], -1.f, 1.f);
					new_rot.mQ[VY] = U16_to_F32(val[VY], -1.f, 1.f);
					new_rot.mQ[VZ] = U16_to_F32(val[VZ], -1.f, 1.f);
					new_rot.mQ[VW] = U16_to_F32(val[VW], -1.f, 1.f);

#ifdef LL_BIG_ENDIAN
					htonmemcpy(valswizzle, &data[count], MVT_U16Vec3, 6); 
					val = valswizzle;
#else
					val = (U16 *) &data[count];
#endif
					setAngularVelocity(	U16_to_F32(val[VX], -size, size),
										U16_to_F32(val[VY], -size, size),
										U16_to_F32(val[VZ], -size, size));
					break;

				case 16:
					// this is a terse 8 update
					this_update_precision = 8;
					test_pos_parent.quantize8(-0.5f*size, 1.5f*size, MIN_HEIGHT, MAX_HEIGHT);
					new_pos_parent.mV[VX] = U8_to_F32(data[0], -0.5f*size, 1.5f*size);
					new_pos_parent.mV[VY] = U8_to_F32(data[1], -0.5f*size, 1.5f*size);
					new_pos_parent.mV[VZ] = U8_to_F32(data[2], MIN_HEIGHT, MAX_HEIGHT);

					setVelocity(U8_to_F32(data[3], -size, size),
								U8_to_F32(data[4], -size, size),
								U8_to_F32(data[5], -size, size) );

					setAcceleration(U8_to_F32(data[6], -size, size),
									U8_to_F32(data[7], -size, size),
									U8_to_F32(data[8], -size, size) );

					new_rot.mQ[VX] = U8_to_F32(data[9], -1.f, 1.f);
					new_rot.mQ[VY] = U8_to_F32(data[10], -1.f, 1.f);
					new_rot.mQ[VZ] = U8_to_F32(data[11], -1.f, 1.f);
					new_rot.mQ[VW] = U8_to_F32(data[12], -1.f, 1.f);

					setAngularVelocity(	U8_to_F32(data[13], -size, size),
										U8_to_F32(data[14], -size, size),
										U8_to_F32(data[15], -size, size) );
					break;
				}

				U8 state;
				mesgsys->getU8Fast(_PREHASH_ObjectData, _PREHASH_State, state, block_num );
				mState = state;
				break;
			}

		default:
			break;

		}
	}
	else
	{
		// handle the compressed case
		LLUUID sound_uuid;
		LLUUID	owner_id;
		F32    gain = 0;
		U8     sound_flags = 0;
		F32		cutoff = 0;

		U16 val[4];

		U8		state;

		dp->unpackU8(state, "State");
		mState = state;

		switch(update_type)
		{
			case OUT_TERSE_IMPROVED:
			{
#ifdef DEBUG_UPDATE_TYPE
				llinfos << "CompTI:" << getID() << llendl;
#endif
				U8		value;
				dp->unpackU8(value, "agent");
				if (value)
				{
					LLVector4 collision_plane;
					dp->unpackVector4(collision_plane, "Plane");
					((LLVOAvatar*)this)->setFootPlane(collision_plane);
				}
				test_pos_parent = getPosition();
				dp->unpackVector3(new_pos_parent, "Pos");
				dp->unpackU16(val[VX], "VelX");
				dp->unpackU16(val[VY], "VelY");
				dp->unpackU16(val[VZ], "VelZ");
				setVelocity(U16_to_F32(val[VX], -128.f, 128.f),
							U16_to_F32(val[VY], -128.f, 128.f),
							U16_to_F32(val[VZ], -128.f, 128.f));
				dp->unpackU16(val[VX], "AccX");
				dp->unpackU16(val[VY], "AccY");
				dp->unpackU16(val[VZ], "AccZ");
				setAcceleration(U16_to_F32(val[VX], -64.f, 64.f),
								U16_to_F32(val[VY], -64.f, 64.f),
								U16_to_F32(val[VZ], -64.f, 64.f));

				dp->unpackU16(val[VX], "ThetaX");
				dp->unpackU16(val[VY], "ThetaY");
				dp->unpackU16(val[VZ], "ThetaZ");
				dp->unpackU16(val[VS], "ThetaS");
				new_rot.mQ[VX] = U16_to_F32(val[VX], -1.f, 1.f);
				new_rot.mQ[VY] = U16_to_F32(val[VY], -1.f, 1.f);
				new_rot.mQ[VZ] = U16_to_F32(val[VZ], -1.f, 1.f);
				new_rot.mQ[VS] = U16_to_F32(val[VS], -1.f, 1.f);
				dp->unpackU16(val[VX], "AccX");
				dp->unpackU16(val[VY], "AccY");
				dp->unpackU16(val[VZ], "AccZ");
				setAngularVelocity(	U16_to_F32(val[VX], -64.f, 64.f),
									U16_to_F32(val[VY], -64.f, 64.f),
									U16_to_F32(val[VZ], -64.f, 64.f));
			}
			break;
			case OUT_FULL_COMPRESSED:
			case OUT_FULL_CACHED:
			{
#ifdef DEBUG_UPDATE_TYPE
				llinfos << "CompFull:" << getID() << llendl;
#endif
				mCostStale = true;

				if (isSelected())
				{
					gFloaterTools->dirty();
				}
	
				dp->unpackU32(crc, "CRC");
				mTotalCRC = crc;
				dp->unpackU8(material, "Material");
				U8 old_material = getMaterial();
				if (old_material != material)
				{
					setMaterial(material);
					if (mDrawable.notNull())
					{
						gPipeline.markMoved(mDrawable, FALSE); // undamped
					}
				}
				dp->unpackU8(click_action, "ClickAction");
				setClickAction(click_action);
				dp->unpackVector3(new_scale, "Scale");
				dp->unpackVector3(new_pos_parent, "Pos");
				LLVector3 vec;
				dp->unpackVector3(vec, "Rot");
				new_rot.unpackFromVector3(vec);
				setAcceleration(LLVector3::zero);

				U32 value;
				dp->unpackU32(value, "SpecialCode");
				dp->setPassFlags(value);
				dp->unpackUUID(owner_id, "Owner");

				if (value & 0x80)
				{
					dp->unpackVector3(vec, "Omega");
					setAngularVelocity(vec);
				}

				if (value & 0x20)
				{
					dp->unpackU32(parent_id, "ParentID");
				}
				else
				{
					parent_id = 0;
				}

				S32 sp_size;
				U32 size;
				if (value & 0x2)
				{
					sp_size = 1;
					delete [] mData;
					mData = new U8[1];
					dp->unpackU8(((U8*)mData)[0], "TreeData");
				}
				else if (value & 0x1)
				{
					dp->unpackU32(size, "ScratchPadSize");
					delete [] mData;
					mData = new U8[size];
					dp->unpackBinaryData((U8 *)mData, sp_size, "PartData");
				}
				else
				{
					mData = NULL;
				}

				// Setup object text
				if (!mText && (value & 0x4))
				{
					mText = (LLHUDText *)LLHUDObject::addHUDObject(LLHUDObject::LL_HUD_TEXT);
					mText->setFont(LLFontGL::getFontSansSerif());
					mText->setVertAlignment(LLHUDText::ALIGN_VERT_TOP);
					mText->setMaxLines(-1); // Set to match current agni behavior.
					mText->setSourceObject(this);
					mText->setOnHUDAttachment(isHUDAttachment());
				}

				if (value & 0x4)
				{
					std::string temp_string;
					dp->unpackString(temp_string, "Text");
					LLColor4U coloru;
					dp->unpackBinaryDataFixed(coloru.mV, 4, "Color");
					coloru.mV[3] = 255 - coloru.mV[3];
					mText->setColor(LLColor4(coloru));
					mText->setString(temp_string);

					setChanged(TEXTURE);
				}
				else if(mText.notNull())
				{
					mText->markDead();
					mText = NULL;
				}

                std::string media_url;
				if (value & 0x200)
				{
					dp->unpackString(media_url, "MediaURL");
				}
                retval |= checkMediaURL(media_url);

				//
				// Unpack particle system data
				//
				if (value & 0x8)
				{
					unpackParticleSource(*dp, owner_id);
				}
				else
				{
					deleteParticleSource();
				}
				
				// Mark all extra parameters not used
				std::map<U16, ExtraParameter*>::iterator iter;
				for (iter = mExtraParameterList.begin(); iter != mExtraParameterList.end(); ++iter)
				{
					iter->second->in_use = FALSE;
				}

				// Unpack extra params
				U8 num_parameters;
				dp->unpackU8(num_parameters, "num_params");
				U8 param_block[MAX_OBJECT_PARAMS_SIZE];
				for (U8 param=0; param<num_parameters; ++param)
				{
					U16 param_type;
					S32 param_size;
					dp->unpackU16(param_type, "param_type");
					dp->unpackBinaryData(param_block, param_size, "param_data");
					//llinfos << "Param type: " << param_type << ", Size: " << param_size << llendl;
					LLDataPackerBinaryBuffer dp2(param_block, param_size);
					unpackParameterEntry(param_type, &dp2);
				}

				for (iter = mExtraParameterList.begin(); iter != mExtraParameterList.end(); ++iter)
				{
					if (!iter->second->in_use)
					{
						// Send an update message in case it was formerly in use
						parameterChanged(iter->first, iter->second->data, FALSE, false);
					}
				}

				if (value & 0x10)
				{
					dp->unpackUUID(sound_uuid, "SoundUUID");
					dp->unpackF32(gain, "SoundGain");
					dp->unpackU8(sound_flags, "SoundFlags");
					dp->unpackF32(cutoff, "SoundRadius");
				}

				if (value & 0x100)
				{
					std::string name_value_list;
					dp->unpackString(name_value_list, "NV");

					setNameValueList(name_value_list);
				}

				mTotalCRC = crc;

				setAttachedSound(sound_uuid, owner_id, gain, sound_flags);

				// only get these flags on updates from sim, not cached ones
				// Preload these five flags for every object.
				// Finer shades require the object to be selected, and the selection manager
				// stores the extended permission info.
				U32 flags;
				mesgsys->getU32Fast(_PREHASH_ObjectData, _PREHASH_UpdateFlags, flags, block_num);
				// keep local flags and overwrite remote-controlled flags
				mFlags = (mFlags & FLAGS_LOCAL) | flags;

					// ...new objects that should come in selected need to be added to the selected list
				mCreateSelected = ((flags & FLAGS_CREATE_SELECTED) != 0);
			}
			break;

		default:
			break;
		}
	}

	//
	// Fix object parenting.
	//
	BOOL b_changed_status = FALSE;

	if (OUT_TERSE_IMPROVED != update_type)
	{
		// We only need to update parenting on full updates, terse updates
		// don't send parenting information.
		if (!cur_parentp)
		{
			if (parent_id == 0)
			{
				// No parent now, no parent in message -> do nothing
			}
			else
			{
				// No parent now, new parent in message -> attach to that parent if possible
				LLUUID parent_uuid;
				LLViewerObjectList::getUUIDFromLocal(parent_uuid,
														parent_id,
														mesgsys->getSenderIP(),
														mesgsys->getSenderPort());

				LLViewerObject *sent_parentp = gObjectList.findObject(parent_uuid);

				//
				// Check to see if we have the corresponding viewer object for the parent.
				//
				if (sent_parentp && sent_parentp->getParent() == this)
				{
					// Try to recover if we attempt to attach a parent to its child
					llwarns << "Attempt to attach a parent to it's child: " << this->getID() << " to " << sent_parentp->getID() << llendl;
					this->removeChild(sent_parentp);
					sent_parentp->setDrawableParent(NULL);
				}
				
				if (sent_parentp && (sent_parentp != this) && !sent_parentp->isDead())
				{
					//
					// We have a viewer object for the parent, and it's not dead.
					// Do the actual reparenting here.
					//

					// new parent is valid
					b_changed_status = TRUE;
					// ...no current parent, so don't try to remove child
					if (mDrawable.notNull())
					{
						if (mDrawable->isDead() || !mDrawable->getVObj())
						{
							llwarns << "Drawable is dead or no VObj!" << llendl;
							sent_parentp->addChild(this);
						}
						else
						{
							if (!setDrawableParent(sent_parentp->mDrawable)) // LLViewerObject::processUpdateMessage 1
							{
								// Bad, we got a cycle somehow.
								// Kill both the parent and the child, and
								// set cache misses for both of them.
								llwarns << "Attempting to recover from parenting cycle!" << llendl;
								llwarns << "Killing " << sent_parentp->getID() << " and " << getID() << llendl;
								llwarns << "Adding to cache miss list" << llendl;
								setParent(NULL);
								sent_parentp->setParent(NULL);
								getRegion()->addCacheMissFull(getLocalID());
								getRegion()->addCacheMissFull(sent_parentp->getLocalID());
								gObjectList.killObject(sent_parentp);
								gObjectList.killObject(this);
								return retval;
							}
							sent_parentp->addChild(this);
							// make sure this object gets a non-damped update
							if (sent_parentp->mDrawable.notNull())
							{
								gPipeline.markMoved(sent_parentp->mDrawable, FALSE); // undamped
							}
						}
					}
					else
					{
						sent_parentp->addChild(this);
					}
					
					// Show particles, icon and HUD
					hideExtraDisplayItems( FALSE );

					setChanged(MOVED | SILHOUETTE);
				}
				else
				{
					//
					// No corresponding viewer object for the parent, put the various
					// pieces on the orphan list.
					//
					
					//parent_id
					U32 ip = mesgsys->getSenderIP();
					U32 port = mesgsys->getSenderPort();
					
					gObjectList.orphanize(this, parent_id, ip, port);

					// Hide particles, icon and HUD
					hideExtraDisplayItems( TRUE );
				}
			}
		}
		else
		{
			// BUG: this is a bad assumption once border crossing is alowed
			if (  (parent_id == cur_parentp->mLocalID)
				&&(update_type == OUT_TERSE_IMPROVED))
			{
				// Parent now, same parent in message -> do nothing

				// Debugging for suspected problems with local ids.
				//LLUUID parent_uuid;
				//LLViewerObjectList::getUUIDFromLocal(parent_uuid, parent_id, mesgsys->getSenderIP(), mesgsys->getSenderPort() );
				//if (parent_uuid != cur_parentp->getID() )
				//{
				//	llerrs << "Local ID match but UUID mismatch of viewer object" << llendl;
				//}
			}
			else
			{
				// Parented now, different parent in message
				LLViewerObject *sent_parentp;
				if (parent_id == 0)
				{
					//
					// This object is no longer parented, we sent in a zero parent ID.
					//
					sent_parentp = NULL;
				}
				else
				{
					LLUUID parent_uuid;
					LLViewerObjectList::getUUIDFromLocal(parent_uuid,
														parent_id,
														gMessageSystem->getSenderIP(),
														gMessageSystem->getSenderPort());
					sent_parentp = gObjectList.findObject(parent_uuid);
					
					if (isAvatar())
					{
						// This logic is meant to handle the case where a sitting avatar has reached a new sim
						// ahead of the object she was sitting on (which is common as objects are transfered through
						// a slower route than agents)...
						// In this case, the local id for the object will not be valid, since the viewer has not received
						// a full update for the object from that sim yet, so we assume that the agent is still sitting
						// where she was originally. --RN
						if (!sent_parentp)
						{
							sent_parentp = cur_parentp;
						}
					}
					else if (!sent_parentp)
					{
						//
						// Switching parents, but we don't know the new parent.
						//
						U32 ip = mesgsys->getSenderIP();
						U32 port = mesgsys->getSenderPort();

						// We're an orphan, flag things appropriately.
						gObjectList.orphanize(this, parent_id, ip, port);
					}
				}

				// Reattach if possible.
				if (sent_parentp && sent_parentp != cur_parentp && sent_parentp != this)
				{
					// New parent is valid, detach and reattach
					b_changed_status = TRUE;
					if (mDrawable.notNull())
					{
						if (!setDrawableParent(sent_parentp->mDrawable)) // LLViewerObject::processUpdateMessage 2
						{
							// Bad, we got a cycle somehow.
							// Kill both the parent and the child, and
							// set cache misses for both of them.
							llwarns << "Attempting to recover from parenting cycle!" << llendl;
							llwarns << "Killing " << sent_parentp->getID() << " and " << getID() << llendl;
							llwarns << "Adding to cache miss list" << llendl;
							setParent(NULL);
							sent_parentp->setParent(NULL);
							getRegion()->addCacheMissFull(getLocalID());
							getRegion()->addCacheMissFull(sent_parentp->getLocalID());
							gObjectList.killObject(sent_parentp);
							gObjectList.killObject(this);
							return retval;
						}
						// make sure this object gets a non-damped update
					}
					cur_parentp->removeChild(this);
					sent_parentp->addChild(this);
					setChanged(MOVED | SILHOUETTE);
					sent_parentp->setChanged(MOVED | SILHOUETTE);
					if (sent_parentp->mDrawable.notNull())
					{
						gPipeline.markMoved(sent_parentp->mDrawable, FALSE); // undamped
					}
				}
				else if (!sent_parentp)
				{
					bool remove_parent = true;
					// No new parent, or the parent that we sent doesn't exist on the viewer.
					LLViewerObject *parentp = (LLViewerObject *)getParent();
					if (parentp)
					{
						if (parentp->getRegion() != getRegion())
						{
							// This is probably an object flying across a region boundary, the
							// object probably ISN'T being reparented, but just got an object
							// update out of order (child update before parent).
							//llinfos << "Don't reparent object handoffs!" << llendl;
							remove_parent = false;
						}
					}

					if (remove_parent)
					{
						b_changed_status = TRUE;
						if (mDrawable.notNull())
						{
							// clear parent to removeChild can put the drawable on the damped list
							setDrawableParent(NULL); // LLViewerObject::processUpdateMessage 3
						}

						cur_parentp->removeChild(this);

						if (mJointInfo && !parent_id)
						{
							// since this object is no longer parent-relative
							// we make sure we delete any joint info
							delete mJointInfo;
							mJointInfo = NULL;
						}

						setChanged(MOVED | SILHOUETTE);

						if (mDrawable.notNull())
						{
							// make sure this object gets a non-damped update
							gPipeline.markMoved(mDrawable, FALSE); // undamped
						}
					}
				}
			}
		}
	}

	new_rot.normQuat();

	if (sPingInterpolate)
	{ 
		LLCircuitData *cdp = gMessageSystem->mCircuitInfo.findCircuit(mesgsys->getSender());
		if (cdp)
		{
			F32 ping_delay = 0.5f * mTimeDilation * ( ((F32)cdp->getPingDelay()) * 0.001f + gFrameDTClamped);
			LLVector3 diff = getVelocity() * ping_delay; 
			new_pos_parent += diff;
		}
		else
		{
			llwarns << "findCircuit() returned NULL; skipping interpolation" << llendl;
		}
	}

	//////////////////////////
	//
	// Set the generic change flags...
	//
	//

	// If we're going to skip this message, why are we 
	// doing all the parenting, etc above?
	U32 packet_id = mesgsys->getCurrentRecvPacketID(); 
	if (packet_id < mLatestRecvPacketID && 
		mLatestRecvPacketID - packet_id < 65536)
	{
		//skip application of this message, it's old
		return retval;
	}

	mLatestRecvPacketID = packet_id;

	// Set the change flags for scale
	if (new_scale != getScale())
	{
		setChanged(SCALED | SILHOUETTE);
		setScale(new_scale);  // Must follow setting permYouOwner()
	}

	// first, let's see if the new position is actually a change

	//static S32 counter = 0;

	F32 vel_mag_sq = getVelocity().magVecSquared();
	F32 accel_mag_sq = getAcceleration().magVecSquared();

	if (  ((b_changed_status)||(test_pos_parent != new_pos_parent))
		||(  (!isSelected())
		   &&(  (vel_mag_sq != 0.f)
			  ||(accel_mag_sq != 0.f)
			  ||(this_update_precision > mBestUpdatePrecision))))
	{
		mBestUpdatePrecision = this_update_precision;
		
		LLVector3 diff = new_pos_parent - test_pos_parent ;
		F32 mag_sqr = diff.magVecSquared() ;
		if(llfinite(mag_sqr)) 
		{
			setPositionParent(new_pos_parent);
		}
		else
		{
			llwarns << "Can not move the object/avatar to an infinite location!" << llendl ;	

			retval |= INVALID_UPDATE ;
		}

		if (mParent && ((LLViewerObject*)mParent)->isAvatar())
		{
			// we have changed the position of an attachment, so we need to clamp it
			LLVOAvatar *avatar = (LLVOAvatar*)mParent;

			avatar->clampAttachmentPositions();
		}
		
		// If we're snapping the position by more than 0.5m, update LLViewerStats::mAgentPositionSnaps
		if ( asAvatar() && asAvatar()->isSelf() && (mag_sqr > 0.25f) )
		{
			LLViewerStats::getInstance()->mAgentPositionSnaps.push( diff.length() );
		}
	}

	if (new_rot != mLastRot
		|| new_angv != old_angv)
	{
		if (new_rot != mLastRot)
		{
			mLastRot = new_rot;
			setRotation(new_rot);
		}
		
		setChanged(ROTATED | SILHOUETTE);
		
		resetRot();
	}


	if ( gShowObjectUpdates )
	{
		LLColor4 color;
		if (update_type == OUT_TERSE_IMPROVED)
		{
			color.setVec(0.f, 0.f, 1.f, 1.f);
		}
		else
		{
			color.setVec(1.f, 0.f, 0.f, 1.f);
		}
		gPipeline.addDebugBlip(getPositionAgent(), color);
	}

	if ((0.0f == vel_mag_sq) && 
		(0.0f == accel_mag_sq) &&
		(0.0f == getAngularVelocity().magVecSquared()))
	{
		mStatic = TRUE; // This object doesn't move!
	}
	else
	{
		mStatic = FALSE;
	}

// BUG: This code leads to problems during group rotate and any scale operation.
// Small discepencies between the simulator and viewer representations cause the 
// selection center to creep, leading to objects moving around the wrong center.
// 
// Removing this, however, means that if someone else drags an object you have
// selected, your selection center and dialog boxes will be wrong.  It also means
// that higher precision information on selected objects will be ignored.
//
// I believe the group rotation problem is fixed.  JNC 1.21.2002
//
	// Additionally, if any child is selected, need to update the dialogs and selection
	// center.
	BOOL needs_refresh = mUserSelected;
	for (child_list_t::iterator iter = mChildList.begin();
		 iter != mChildList.end(); iter++)
	{
		LLViewerObject* child = *iter;
		needs_refresh = needs_refresh || child->mUserSelected;
	}

	if (needs_refresh)
	{
		LLSelectMgr::getInstance()->updateSelectionCenter();
		dialog_refresh_all();
	} 


	// Mark update time as approx. now, with the ping delay.
	// Ping delay is off because it's not set for velocity interpolation, causing
	// much jumping and hopping around...

//	U32 ping_delay = mesgsys->mCircuitInfo.getPingDelay();
	mLastInterpUpdateSecs = LLFrameTimer::getElapsedSeconds();
	mLastMessageUpdateSecs = mLastInterpUpdateSecs;
	if (mDrawable.notNull())
	{
		// Don't clear invisibility flag on update if still orphaned!
		if (mDrawable->isState(LLDrawable::FORCE_INVISIBLE) && !mOrphaned)
		{
// 			lldebugs << "Clearing force invisible: " << mID << ":" << getPCodeString() << ":" << getPositionAgent() << llendl;
			mDrawable->setState(LLDrawable::CLEAR_INVISIBLE);
		}
	}

	// Update special hover cursor status
	bool special_hover_cursor = specialHoverCursor();
	if (old_special_hover_cursor != special_hover_cursor
		&& mDrawable.notNull())
	{
		mDrawable->updateSpecialHoverCursor(special_hover_cursor);
	}

	return retval;
}

BOOL LLViewerObject::isActive() const
{
	return TRUE;
}



BOOL LLViewerObject::idleUpdate(LLAgent &agent, LLWorld &world, const F64 &time)
{
	static LLFastTimer::DeclareTimer ftm("Viewer Object");
	LLFastTimer t(ftm);

	if (mDead)
	{
		// It's dead.  Don't update it.
		return TRUE;
	}

	// CRO - don't velocity interp linked objects!
	// Leviathan - but DO velocity interp joints
	if (!mStatic && sVelocityInterpolate && !isSelected())
	{
		// calculate dt from last update
		F32 dt_raw = (F32)(time - mLastInterpUpdateSecs);
		F32 dt = mTimeDilation * dt_raw;

		if (!mJointInfo)
		{
			applyAngularVelocity(dt);
		}

		LLViewerObject *parentp = (LLViewerObject *) getParent();
		if (mJointInfo)
		{
			if (parentp)
			{
				// do parent-relative stuff
				LLVector3 ang_vel = getAngularVelocity();
				F32 omega = ang_vel.magVecSquared();
				F32 angle = 0.0f;
				LLQuaternion dQ;
				if (omega > 0.00001f)
				{
					omega = sqrt(omega);
					angle = omega * dt;
					dQ.setQuat(angle, ang_vel);
				}
				LLVector3 pos = getPosition();
	
				if (HJT_HINGE == mJointInfo->mJointType)
				{
					// hinge = uniform circular motion
					LLVector3 parent_pivot = getVelocity();
					LLVector3 parent_axis = getAcceleration();
	
					angle = dt * (ang_vel * mJointInfo->mAxisOrAnchor);	// AxisOrAnchor = axis
					dQ.setQuat(angle, mJointInfo->mAxisOrAnchor);		// AxisOrAnchor = axis
					LLVector3 pivot_offset = pos - mJointInfo->mPivot;	// pos in pivot-frame
					pivot_offset = pivot_offset * dQ;					// new rotated pivot-frame pos
					pos = mJointInfo->mPivot + pivot_offset;			// parent-frame
					LLViewerObject::setPosition(pos);
					LLQuaternion Q_PC = getRotation();
					setRotation(Q_PC * dQ);
					mLastInterpUpdateSecs = time;
				}
				else if (HJT_POINT == mJointInfo->mJointType)
						// || HJT_LPOINT == mJointInfo->mJointType)
				{
					// point-to-point = spin about axis and uniform circular motion
					// 					of axis about the pivot point
					//
					// NOTE: this interpolation scheme is not quite good enough to
					// reduce the bandwidth -- needs a gravitational correction. 
					// Similarly for hinges with axes that deviate from vertical.
	
					LLQuaternion Q_PC = getRotation();
					Q_PC = Q_PC * dQ;
					setRotation(Q_PC);

					LLVector3 pivot_to_child = - mJointInfo->mAxisOrAnchor;	// AxisOrAnchor = anchor
					pos = mJointInfo->mPivot + pivot_to_child * Q_PC;
					LLViewerObject::setPosition(pos);
					mLastInterpUpdateSecs = time;
				}
				/* else if (HJT_WHEEL == mJointInfo->mJointInfo)
				{
					// wheel = uniform rotation about axis, with linear
					//		   velocity interpolation (if any)
					LLVector3 parent_axis = getAcceleration();	// HACK -- accel stores the parent-axis (parent-frame)
	
					LLQuaternion Q_PC = getRotation();
	
					angle = dt * (parent_axis * ang_vel);
					dQ.setQuat(angle, parent_axis);
	
					Q_PC = Q_PC * dQ;
					setRotation(Q_PC);

					pos = getPosition() + dt * getVelocity();
					LLViewerObject::setPosition(pos);
					mLastInterpUpdateSecs = time;
				}*/
			}
		}
		else if (isAttachment())
		{
			mLastInterpUpdateSecs = time;
			return TRUE;
		}
		else
		{	// Move object based on it's velocity and rotation
			interpolateLinearMotion(time, dt);
		}
	}

	updateDrawable(FALSE);

	return TRUE;
}


// Move an object due to idle-time viewer side updates by iterpolating motion
void LLViewerObject::interpolateLinearMotion(const F64 & time, const F32 & dt)
{
	// linear motion
	// PHYSICS_TIMESTEP is used below to correct for the fact that the velocity in object
	// updates represents the average velocity of the last timestep, rather than the final velocity.
	// the time dilation above should guarantee that dt is never less than PHYSICS_TIMESTEP, theoretically
	// 
	// *TODO: sh