/** 
 * @file llviewerobjectlist.cpp
 * @brief Implementation of LLViewerObjectList class.
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * 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 "llviewerobjectlist.h"

#include "message.h"
#include "llfasttimer.h"
#include "llrender.h"
#include "llwindow.h"		// decBusyCount()

#include "llviewercontrol.h"
#include "llface.h"
#include "llvoavatar.h"
#include "llviewerobject.h"
#include "llviewerwindow.h"
#include "llnetmap.h"
#include "llagent.h"
#include "llagentcamera.h"
#include "pipeline.h"
#include "llspatialpartition.h"
#include "lltooltip.h"
#include "llworld.h"
#include "llstring.h"
#include "llhudicon.h"
#include "llhudnametag.h"
#include "lldrawable.h"
#include "llflexibleobject.h"
#include "llviewertextureanim.h"
#include "xform.h"
#include "llsky.h"
#include "llviewercamera.h"
#include "llselectmgr.h"
#include "llresmgr.h"
#include "llsdutil.h"
#include "llviewerregion.h"
#include "llviewerstats.h"
#include "llviewerstatsrecorder.h"
#include "llvovolume.h"
#include "llvoavatarself.h"
#include "lltoolmgr.h"
#include "lltoolpie.h"
#include "llkeyboard.h"
#include "u64.h"
#include "llviewertexturelist.h"
#include "lldatapacker.h"
#include "llcallstack.h"
#ifdef LL_USESYSTEMLIBS
#include <zlib.h>
#else
#include "zlib-ng/zlib.h"
#endif
#include "object_flags.h"

#include "llappviewer.h"
#include "llfloaterperms.h"
#include "llvocache.h"
#include "llcorehttputil.h"
#include "llstartup.h"

#include <algorithm>
#include <iterator>

extern F32 gMinObjectDistance;
extern BOOL gAnimateTextures;

#define MAX_CONCURRENT_PHYSICS_REQUESTS 256

void dialog_refresh_all();

// Global lists of objects - should go away soon.
LLViewerObjectList gObjectList;

extern LLPipeline	gPipeline;

// Statics for object lookup tables.
U32						LLViewerObjectList::sSimulatorMachineIndex = 1; // Not zero deliberately, to speed up index check.
std::map<U64, U32>		LLViewerObjectList::sIPAndPortToIndex;
std::map<U64, LLUUID>	LLViewerObjectList::sIndexAndLocalIDToUUID;

LLViewerObjectList::LLViewerObjectList()
{
	mCurLazyUpdateIndex = 0;
	mCurBin = 0;
	mNumDeadObjects = 0;
	mNumOrphans = 0;
	mNumNewObjects = 0;
	mWasPaused = FALSE;
	mNumDeadObjectUpdates = 0;
	mNumUnknownUpdates = 0;
}

LLViewerObjectList::~LLViewerObjectList()
{
	destroy();
}

void LLViewerObjectList::destroy()
{
	killAllObjects();

	resetObjectBeacons();
	mActiveObjects.clear();
	mDeadObjects.clear();
	mMapObjects.clear();
	mUUIDObjectMap.clear();
}


void LLViewerObjectList::getUUIDFromLocal(LLUUID &id,
										  const U32 local_id,
										  const U32 ip,
										  const U32 port)
{
	U64 ipport = (((U64)ip) << 32) | (U64)port;

	U32 index = sIPAndPortToIndex[ipport];

	if (!index)
	{
		index = sSimulatorMachineIndex++;
		sIPAndPortToIndex[ipport] = index;
	}

	U64	indexid = (((U64)index) << 32) | (U64)local_id;

	id = get_if_there(sIndexAndLocalIDToUUID, indexid, LLUUID::null);
}

U64 LLViewerObjectList::getIndex(const U32 local_id,
								 const U32 ip,
								 const U32 port)
{
	U64 ipport = (((U64)ip) << 32) | (U64)port;

	U32 index = sIPAndPortToIndex[ipport];

	if (!index)
	{
		return 0;
	}

	return (((U64)index) << 32) | (U64)local_id;
}

BOOL LLViewerObjectList::removeFromLocalIDTable(const LLViewerObject* objectp)
{
	LL_PROFILE_ZONE_SCOPED_CATEGORY_NETWORK;

	if(objectp && objectp->getRegion())
	{
		U32 local_id = objectp->mLocalID;		
		U32 ip = objectp->getRegion()->getHost().getAddress();
		U32 port = objectp->getRegion()->getHost().getPort();
		U64 ipport = (((U64)ip) << 32) | (U64)port;
		U32 index = sIPAndPortToIndex[ipport];
		
		// LL_INFOS() << "Removing object from table, local ID " << local_id << ", ip " << ip << ":" << port << LL_ENDL;
		
		U64	indexid = (((U64)index) << 32) | (U64)local_id;
		
		std::map<U64, LLUUID>::iterator iter = sIndexAndLocalIDToUUID.find(indexid);
		if (iter == sIndexAndLocalIDToUUID.end())
		{
			return FALSE;
		}
		
		// Found existing entry
		if (iter->second == objectp->getID())
		{   // Full UUIDs match, so remove the entry
			sIndexAndLocalIDToUUID.erase(iter);
			return TRUE;
		}
		// UUIDs did not match - this would zap a valid entry, so don't erase it
		//LL_INFOS() << "Tried to erase entry where id in table (" 
		//		<< iter->second	<< ") did not match object " << object.getID() << LL_ENDL;
	}
	
	return FALSE ;
}

void LLViewerObjectList::setUUIDAndLocal(const LLUUID &id,
										  const U32 local_id,
										  const U32 ip,
										  const U32 port)
{
	U64 ipport = (((U64)ip) << 32) | (U64)port;

	U32 index = sIPAndPortToIndex[ipport];

	if (!index)
	{
		index = sSimulatorMachineIndex++;
		sIPAndPortToIndex[ipport] = index;
	}

	U64	indexid = (((U64)index) << 32) | (U64)local_id;

	sIndexAndLocalIDToUUID[indexid] = id;
	
	//LL_INFOS() << "Adding object to table, full ID " << id
	//	<< ", local ID " << local_id << ", ip " << ip << ":" << port << LL_ENDL;
}

S32 gFullObjectUpdates = 0;
S32 gTerseObjectUpdates = 0;

void LLViewerObjectList::processUpdateCore(LLViewerObject* objectp, 
										   void** user_data, 
										   U32 i, 
										   const EObjectUpdateType update_type, 
										   LLDataPacker* dpp, 
										   bool just_created,
										   bool from_cache)
{
	LLMessageSystem* msg = NULL;
	
	if(!from_cache)
	{
		msg = gMessageSystem;
	}

	// ignore returned flags
    LL_DEBUGS("ObjectUpdate") << "uuid " << objectp->mID << " calling processUpdateMessage " 
                              << objectp << " just_created " << just_created << " from_cache " << from_cache << " msg " << msg << LL_ENDL;
    dumpStack("ObjectUpdateStack");
	 	
	objectp->processUpdateMessage(msg, user_data, i, update_type, dpp);
		
	if (objectp->isDead())
	{
		// The update failed
		return;
	}

	updateActive(objectp);

	if (just_created) 
	{
		gPipeline.addObject(objectp);
	}

	// Also sets the approx. pixel area
	objectp->setPixelAreaAndAngle(gAgent);

	// RN: this must be called after we have a drawable 
	// (from gPipeline.addObject)
	// so that the drawable parent is set properly
	if(msg != NULL)
	{
	findOrphans(objectp, msg->getSenderIP(), msg->getSenderPort());
	}
	else
	{
		LLViewerRegion* regionp = objectp->getRegion();
		if(regionp != NULL)
		{
			findOrphans(objectp, regionp->getHost().getAddress(), regionp->getHost().getPort());
		}
	}
	
	// If we're just wandering around, don't create new objects selected.
	if (just_created 
		&& update_type != OUT_TERSE_IMPROVED 
		&& objectp->mCreateSelected)
	{
		if ( LLToolMgr::getInstance()->getCurrentTool() != LLToolPie::getInstance() )
		{
			// LL_INFOS() << "DEBUG selecting " << objectp->mID << " " 
			// << objectp->mLocalID << LL_ENDL;
			LLSelectMgr::getInstance()->selectObjectAndFamily(objectp);
			dialog_refresh_all();
		}

		objectp->mCreateSelected = false;
		gViewerWindow->getWindow()->decBusyCount();
		gViewerWindow->setCursor( UI_CURSOR_ARROW );
	}
}

static LLTrace::BlockTimerStatHandle FTM_PROCESS_OBJECTS("Process Objects");

LLViewerObject* LLViewerObjectList::processObjectUpdateFromCache(LLVOCacheEntry* entry, LLViewerRegion* regionp)
{
	LL_PROFILE_ZONE_SCOPED_CATEGORY_NETWORK;

	LLDataPacker *cached_dpp = entry->getDP();

	if (!cached_dpp || gNonInteractive)
	{
		return NULL; //nothing cached.
	}
	
	LLViewerObject *objectp;
	U32			    local_id;
	LLPCode		    pcode = 0;
	LLUUID		    fullid;
	LLViewerStatsRecorder& recorder = LLViewerStatsRecorder::instance();

	// Cache Hit.
	record(LLStatViewer::OBJECT_CACHE_HIT_RATE, LLUnits::Ratio::fromValue(1));

	cached_dpp->reset();
	cached_dpp->unpackUUID(fullid, "ID");
	cached_dpp->unpackU32(local_id, "LocalID");
	cached_dpp->unpackU8(pcode, "PCode");

	objectp = findObject(fullid);

	if (objectp)
	{
		if(!objectp->isDead() && (objectp->mLocalID != entry->getLocalID() ||
			objectp->getRegion() != regionp))
		{
			removeFromLocalIDTable(objectp);
			setUUIDAndLocal(fullid, entry->getLocalID(),
							regionp->getHost().getAddress(),
							regionp->getHost().getPort());
				
			if (objectp->mLocalID != entry->getLocalID())
			{	// Update local ID in object with the one sent from the region
				objectp->mLocalID = entry->getLocalID();
			}
			
			if (objectp->getRegion() != regionp)
			{	// Object changed region, so update it
				objectp->updateRegion(regionp); // for LLVOAvatar
			}
		}
		else
		{
			//should fall through if already loaded because may need to update the object.
			//return objectp; //already loaded.
		}
	}

	bool justCreated = false;
	if (!objectp)
	{
		objectp = createObjectFromCache(pcode, regionp, fullid, entry->getLocalID());

        LL_DEBUGS("ObjectUpdate") << "uuid " << fullid << " created objectp " << objectp << LL_ENDL;
        dumpStack("ObjectUpdateStack");
	 	
		if (!objectp)
		{
			LL_INFOS() << "createObject failure for object: " << fullid << LL_ENDL;
			recorder.objectUpdateFailure(entry->getLocalID(), OUT_FULL_CACHED, 0);
			return NULL;
		}
		justCreated = true;
		mNumNewObjects++;
	}

	if (objectp->isDead())
	{
		LL_WARNS() << "Dead object " << objectp->mID << " in UUID map 1!" << LL_ENDL;
	}
		
	processUpdateCore(objectp, NULL, 0, OUT_FULL_CACHED, cached_dpp, justCreated, true);
	objectp->loadFlags(entry->getUpdateFlags()); //just in case, reload update flags from cache.
	
	if(entry->getHitCount() > 0)
	{
		objectp->setLastUpdateType(OUT_FULL_CACHED);
	}
	else
	{
		objectp->setLastUpdateType(OUT_FULL_COMPRESSED); //newly cached
		objectp->setLastUpdateCached(TRUE);
	}
	recorder.log(0.2f);
	LLVOAvatar::cullAvatarsByPixelArea();

	return objectp;
}

void LLViewerObjectList::processObjectUpdate(LLMessageSystem *mesgsys,
											 void **user_data,
											 const EObjectUpdateType update_type,
											 bool compressed)
{
	LL_RECORD_BLOCK_TIME(FTM_PROCESS_OBJECTS);	
	
	LLViewerObject *objectp;
	S32			num_objects;
	U32			local_id;
	LLPCode		pcode = 0;
	LLUUID		fullid;
	S32			i;

	// figure out which simulator these are from and get it's index
	// Coordinates in simulators are region-local
	// Until we get region-locality working on viewer we
	// have to transform to absolute coordinates.
	num_objects = mesgsys->getNumberOfBlocksFast(_PREHASH_ObjectData);

	// I don't think this case is ever hit.  TODO* Test this.
	if (!compressed && update_type != OUT_FULL)
	{
		//LL_INFOS() << "TEST: !cached && !compressed && update_type != OUT_FULL" << LL_ENDL;
		gTerseObjectUpdates += num_objects;
		/*
		S32 size;
		if (mesgsys->getReceiveCompressedSize())
		{
			size = mesgsys->getReceiveCompressedSize();
		}
		else
		{
			size = mesgsys->getReceiveSize();
		}
		LL_INFOS() << "Received terse " << num_objects << " in " << size << " byte (" << size/num_objects << ")" << LL_ENDL;
		*/
	}
	else
	{
		/*
		S32 size;
		if (mesgsys->getReceiveCompressedSize())
		{
			size = mesgsys->getReceiveCompressedSize();
		}
		else
		{
			size = mesgsys->getReceiveSize();
		}

		LL_INFOS() << "Received " << num_objects << " in " << size << " byte (" << size/num_objects << ")" << LL_ENDL;
		*/
		gFullObjectUpdates += num_objects;
	}

	U64 region_handle;
	mesgsys->getU64Fast(_PREHASH_RegionData, _PREHASH_RegionHandle, region_handle);
	
	LLViewerRegion *regionp = LLWorld::getInstance()->getRegionFromHandle(region_handle);

	if (!regionp)
	{
		LL_WARNS() << "Object update from unknown region! " << region_handle << LL_ENDL;
		return;
	}

	U8 compressed_dpbuffer[2048];
	LLDataPackerBinaryBuffer compressed_dp(compressed_dpbuffer, 2048);
	LLViewerStatsRecorder& recorder = LLViewerStatsRecorder::instance();

	for (i = 0; i < num_objects; i++)
	{
		// timer is unused?
		LLTimer update_timer;
		BOOL justCreated = FALSE;
		S32	msg_size = 0;
		bool update_cache = false; //update object cache if it is a full-update or terse update

		if (compressed)
		{
			S32							uncompressed_length = 2048;
			compressed_dp.reset();

			uncompressed_length = mesgsys->getSizeFast(_PREHASH_ObjectData, i, _PREHASH_Data);
			LL_DEBUGS("ObjectUpdate") << "got binary data from message to compressed_dpbuffer" << LL_ENDL;
			mesgsys->getBinaryDataFast(_PREHASH_ObjectData, _PREHASH_Data, compressed_dpbuffer, 0, i, 2048);
			compressed_dp.assignBuffer(compressed_dpbuffer, uncompressed_length);

			if (update_type != OUT_TERSE_IMPROVED) // OUT_FULL_COMPRESSED only?
			{
				U32 flags = 0;
				mesgsys->getU32Fast(_PREHASH_ObjectData, _PREHASH_UpdateFlags, flags, i);

				compressed_dp.unpackUUID(fullid, "ID");
				compressed_dp.unpackU32(local_id, "LocalID");
				compressed_dp.unpackU8(pcode, "PCode");
				
				if (pcode == 0)
				{
					// object creation will fail, LLViewerObject::createObject()
					LL_WARNS() << "Received object " << fullid
						<< " with 0 PCode. Local id: " << local_id
						<< " Flags: " << flags
						<< " Region: " << regionp->getName()
						<< " Region id: " << regionp->getRegionID() << LL_ENDL;
					recorder.objectUpdateFailure(local_id, update_type, msg_size);
					continue;
				}
				else if ((flags & FLAGS_TEMPORARY_ON_REZ) == 0)
				{
					//send to object cache
					regionp->cacheFullUpdate(compressed_dp, flags);
					continue;
				}
			}
			else //OUT_TERSE_IMPROVED
			{
				update_cache = true;
				compressed_dp.unpackU32(local_id, "LocalID");
				getUUIDFromLocal(fullid,
								 local_id,
								 gMessageSystem->getSenderIP(),
								 gMessageSystem->getSenderPort());
				if (fullid.isNull())
				{
					LL_DEBUGS() << "update for unknown localid " << local_id << " host " << gMessageSystem->getSender() << ":" << gMessageSystem->getSenderPort() << LL_ENDL;
					mNumUnknownUpdates++;
				}
			}
		}
		else if (update_type != OUT_FULL) // !compressed, !OUT_FULL ==> OUT_FULL_CACHED only?
		{
			mesgsys->getU32Fast(_PREHASH_ObjectData, _PREHASH_ID, local_id, i);
			msg_size += sizeof(U32);

			getUUIDFromLocal(fullid,
							local_id,
							gMessageSystem->getSenderIP(),
							gMessageSystem->getSenderPort());
			if (fullid.isNull())
			{
				// LL_WARNS() << "update for unknown localid " << local_id << " host " << gMessageSystem->getSender() << LL_ENDL;
				mNumUnknownUpdates++;
			}
            else
            {
                LL_DEBUGS("ObjectUpdate") << "Non-full, non-compressed update, obj " << local_id << ", global ID " << fullid << " from " << mesgsys->getSender() << LL_ENDL;
            }
		}
		else // OUT_FULL only?
		{
			update_cache = true;
			mesgsys->getUUIDFast(_PREHASH_ObjectData, _PREHASH_FullID, fullid, i);
			mesgsys->getU32Fast(_PREHASH_ObjectData, _PREHASH_ID, local_id, i);
			msg_size += sizeof(LLUUID);
			msg_size += sizeof(U32);
			LL_DEBUGS("ObjectUpdate") << "Full Update, obj " << local_id << ", global ID " << fullid << " from " << mesgsys->getSender() << LL_ENDL;
		}
		objectp = findObject(fullid);

        if (compressed)
        {
            LL_DEBUGS("ObjectUpdate") << "uuid " << fullid << " received compressed data from message (earlier in function)" << LL_ENDL;
        }
        LL_DEBUGS("ObjectUpdate") << "uuid " << fullid << " objectp " << objectp 
                                     << " update_cache " << (S32) update_cache << " compressed " << compressed
                                     << " update_type "  << update_type << LL_ENDL;
        dumpStack("ObjectUpdateStack");
        
		if(update_cache)
		{
			objectp = regionp->updateCacheEntry(local_id, objectp, update_type);
		}

		// This looks like it will break if the local_id of the object doesn't change
		// upon boundary crossing, but we check for region id matching later...
		// Reset object local id and region pointer if things have changed
		if (objectp && 
			((objectp->mLocalID != local_id) ||
			 (objectp->getRegion() != regionp)))
		{
			//if (objectp->getRegion())
			//{
			//	LL_INFOS() << "Local ID change: Removing object from table, local ID " << objectp->mLocalID 
			//			<< ", id from message " << local_id << ", from " 
			//			<< LLHost(objectp->getRegion()->getHost().getAddress(), objectp->getRegion()->getHost().getPort())
			//			<< ", full id " << fullid 
			//			<< ", objects id " << objectp->getID()
			//			<< ", regionp " << (U32) regionp << ", object region " << (U32) objectp->getRegion()
			//			<< LL_ENDL;
			//}
			removeFromLocalIDTable(objectp);
			setUUIDAndLocal(fullid,
							local_id,
							gMessageSystem->getSenderIP(),
							gMessageSystem->getSenderPort());
			
			if (objectp->mLocalID != local_id)
			{	// Update local ID in object with the one sent from the region
				objectp->mLocalID = local_id;
			}
			
			if (objectp->getRegion() != regionp)
			{	// Object changed region, so update it
				objectp->updateRegion(regionp); // for LLVOAvatar
			}
		}

		if (!objectp)
		{
			if (compressed)
			{
				if (update_type == OUT_TERSE_IMPROVED)
				{
					// LL_INFOS() << "terse update for an unknown object (compressed):" << fullid << LL_ENDL;
					recorder.objectUpdateFailure(local_id, update_type, msg_size);
					continue;
				}
			}
			else
			{
				if (update_type != OUT_FULL)
				{
					//LL_INFOS() << "terse update for an unknown object:" << fullid << LL_ENDL;
					recorder.objectUpdateFailure(local_id, update_type, msg_size);
					continue;
				}

				mesgsys->getU8Fast(_PREHASH_ObjectData, _PREHASH_PCode, pcode, i);
				msg_size += sizeof(U8);

			}
#ifdef IGNORE_DEAD
			if (mDeadObjects.find(fullid) != mDeadObjects.end())
			{
				mNumDeadObjectUpdates++;
				//LL_INFOS() << "update for a dead object:" << fullid << LL_ENDL;
				recorder.objectUpdateFailure(local_id, update_type, msg_size);
				continue;
			}
#endif

			objectp = createObject(pcode, regionp, fullid, local_id, gMessageSystem->getSender());

            LL_DEBUGS("ObjectUpdate") << "creating object " << fullid << " result " << objectp << LL_ENDL;
            dumpStack("ObjectUpdateStack");

			if (!objectp)
			{
				LL_INFOS() << "createObject failure for object: " << fullid << LL_ENDL;
				recorder.objectUpdateFailure(local_id, update_type, msg_size);
				continue;
			}

			justCreated = TRUE;
			mNumNewObjects++;
		}

		if (objectp->isDead())
		{
			LL_WARNS() << "Dead object " << objectp->mID << " in UUID map 1!" << LL_ENDL;
		}

		//bool bCached = false;
		if (compressed)
		{
			if (update_type != OUT_TERSE_IMPROVED) // OUT_FULL_COMPRESSED only?
			{
				objectp->mLocalID = local_id;
			}
			processUpdateCore(objectp, user_data, i, update_type, &compressed_dp, justCreated);

#if 0
			if (update_type != OUT_TERSE_IMPROVED) // OUT_FULL_COMPRESSED only?
			{
				U32 flags = 0;
				mesgsys->getU32Fast(_PREHASH_ObjectData, _PREHASH_UpdateFlags, flags, i);
			
				if(!(flags & FLAGS_TEMPORARY_ON_REZ))
				{
				bCached = true;
					LLViewerRegion::eCacheUpdateResult result = objectp->mRegionp->cacheFullUpdate(objectp, compressed_dp, flags);
				recorder.cacheFullUpdate(local_id, update_type, result, objectp, msg_size);
			}
		}
#endif
		}
		else
		{
			if (update_type == OUT_FULL)
			{
				objectp->mLocalID = local_id;
			}
			processUpdateCore(objectp, user_data, i, update_type, NULL, justCreated);
		}
		recorder.objectUpdateEvent(local_id, update_type, objectp, msg_size);
		objectp->setLastUpdateType(update_type);
	}

	recorder.log(0.2f);

	LLVOAvatar::cullAvatarsByPixelArea();
}

void LLViewerObjectList::processCompressedObjectUpdate(LLMessageSystem *mesgsys,
											 void **user_data,
											 const EObjectUpdateType update_type)
{
	processObjectUpdate(mesgsys, user_data, update_type, true);
}

void LLViewerObjectList::processCachedObjectUpdate(LLMessageSystem *mesgsys,
											 void **user_data,
											 const EObjectUpdateType update_type)
{
	//processObjectUpdate(mesgsys, user_data, update_type, true, false);

	S32 num_objects = mesgsys->getNumberOfBlocksFast(_PREHASH_ObjectData);
	gFullObjectUpdates += num_objects;

	U64 region_handle;
	mesgsys->getU64Fast(_PREHASH_RegionData, _PREHASH_RegionHandle, region_handle);	
	LLViewerRegion *regionp = LLWorld::getInstance()->getRegionFromHandle(region_handle);
	if (!regionp)
	{
		LL_WARNS() << "Object update from unknown region! " << region_handle << LL_ENDL;
		return;
	}

	LLViewerStatsRecorder& recorder = LLViewerStatsRecorder::instance();

	for (S32 i = 0; i < num_objects; i++)
	{
		S32	msg_size = 0;
		U32 id;
		U32 crc;
		U32 flags;
		mesgsys->getU32Fast(_PREHASH_ObjectData, _PREHASH_ID, id, i);
		mesgsys->getU32Fast(_PREHASH_ObjectData, _PREHASH_CRC, crc, i);
		mesgsys->getU32Fast(_PREHASH_ObjectData, _PREHASH_UpdateFlags, flags, i);
		msg_size += sizeof(U32) * 2;

        LL_DEBUGS("ObjectUpdate") << "got probe for id " << id << " crc " << crc << LL_ENDL;
        dumpStack("ObjectUpdateStack");

		// Lookup data packer and add this id to cache miss lists if necessary.
		U8 cache_miss_type = LLViewerRegion::CACHE_MISS_TYPE_NONE;
		if(!regionp->probeCache(id, crc, flags, cache_miss_type))
		{
			// Cache Miss.
            LL_DEBUGS("ObjectUpdate") << "cache miss for id " << id << " crc " << crc << " miss type " << (S32) cache_miss_type << LL_ENDL;

			recorder.cacheMissEvent(id, update_type, cache_miss_type, msg_size);

			continue; // no data packer, skip this object
		}
	}

	return;
}	

void LLViewerObjectList::dirtyAllObjectInventory()
{
	for (vobj_list_t::iterator iter = mObjects.begin(); iter != mObjects.end(); ++iter)
	{
		(*iter)->dirtyInventory();
	}
}

void LLViewerObjectList::updateApparentAngles(LLAgent &agent)
{
	S32 i;
	S32 num_objects = 0;
	LLViewerObject *objectp;

	S32 num_updates, max_value;
	if (NUM_BINS - 1 == mCurBin)
	{
		// Remainder (mObjects.size() could have changed)
		num_updates = (S32) mObjects.size() - mCurLazyUpdateIndex;
		max_value = (S32) mObjects.size();
	}
	else
	{
		num_updates = ((S32) mObjects.size() / NUM_BINS) + 1;
		max_value = llmin((S32) mObjects.size(), mCurLazyUpdateIndex + num_updates);
	}


	// Slam priorities for textures that we care about (hovered, selected, and focused)
	// Hovered
	// Assumes only one level deep of parenting
	LLSelectNode* nodep = LLSelectMgr::instance().getHoverNode();
	if (nodep)
	{
		objectp = nodep->getObject();
		if (objectp)
		{
			objectp->boostTexturePriority();
		}
	}

	// Focused
	objectp = gAgentCamera.getFocusObject();
	if (objectp)
	{
		objectp->boostTexturePriority();
	}

	// Selected
	struct f : public LLSelectedObjectFunctor
	{
		virtual bool apply(LLViewerObject* objectp)
		{
			objectp->boostTexturePriority();
			return true;
		}
	} func;
	LLSelectMgr::getInstance()->getSelection()->applyToRootObjects(&func);

	// Iterate through some of the objects and lazy update their texture priorities
	for (i = mCurLazyUpdateIndex; i < max_value; i++)
	{
		objectp = mObjects[i];
		if (!objectp->isDead())
		{
			num_objects++;

			//  Update distance & gpw 
			objectp->setPixelAreaAndAngle(agent); // Also sets the approx. pixel area
			objectp->updateTextures();	// Update the image levels of textures for this object.
		}
	}

	mCurLazyUpdateIndex = max_value;
	if (mCurLazyUpdateIndex == mObjects.size())
	{
		// restart
		mCurLazyUpdateIndex = 0;
		mCurBin = 0; // keep in sync with index (mObjects.size() could have changed)
	}
	else
	{
		mCurBin = (mCurBin + 1) % NUM_BINS;
	}

	LLVOAvatar::cullAvatarsByPixelArea();
}

void LLViewerObjectList::update(LLAgent &agent)
{
	LL_PROFILE_ZONE_SCOPED_CATEGORY_NETWORK;

	// Cached setting vars
	static LLCachedControl<bool> anim_texture_cc(gSavedSettings, "AnimateTextures");
	static LLCachedControl<bool> freeze_time_cc(gSavedSettings, "FreezeTime");
	static LLCachedControl<bool> vel_interp_cc(gSavedSettings, "VelocityInterpolate");
	static LLCachedControl<bool> ping_interp_cc(gSavedSettings, "PingInterpolate");
	static LLCachedControl<F32> interp_time_cc(gSavedSettings, "InterpolationTime");
	static LLCachedControl<F32> phase_out_time_cc(gSavedSettings, "InterpolationPhaseOut");
	static LLCachedControl<F32> region_interp_time_cc(gSavedSettings, "RegionCrossingInterpolationTime");;

	// Update globals
	LLViewerObject::setVelocityInterpolate( vel_interp_cc );
	LLViewerObject::setPingInterpolate( ping_interp_cc );
	
	F32 interp_time = interp_time_cc;
	F32 phase_out_time = phase_out_time_cc;
	F32 region_interp_time = llclamp(region_interp_time_cc(), 0.5f, 5.f);
	if (interp_time < 0.0 || 
		phase_out_time < 0.0 ||
		phase_out_time > interp_time)
	{
		LL_WARNS() << "Invalid values for InterpolationTime or InterpolationPhaseOut, resetting to defaults" << LL_ENDL;
		interp_time = 3.0f;
		phase_out_time = 1.0f;
	}
	LLViewerObject::setPhaseOutUpdateInterpolationTime( interp_time );
	LLViewerObject::setMaxUpdateInterpolationTime( phase_out_time );
	LLViewerObject::setMaxRegionCrossingInterpolationTime(region_interp_time);

	gAnimateTextures = anim_texture_cc;

	// update global timer
	F32 last_time = gFrameTimeSeconds;
	U64Microseconds time = totalTime();				 // this will become the new gFrameTime when the update is done
	// Time _can_ go backwards, for example if the user changes the system clock.
	// It doesn't cause any fatal problems (just some oddness with stats), so we shouldn't assert here.
//	llassert(time > gFrameTime);
	F64Seconds time_diff = time - gFrameTime;
	gFrameTime	= time;
	F64Seconds time_since_start = gFrameTime - gStartTime;
	gFrameTimeSeconds = time_since_start;

	gFrameIntervalSeconds = gFrameTimeSeconds - last_time;
	if (gFrameIntervalSeconds < 0.f)
	{
		gFrameIntervalSeconds = 0.f;
	}

	//clear avatar LOD change counter
	LLVOAvatar::sNumLODChangesThisFrame = 0;

	const F64 frame_time = LLFrameTimer::getElapsedSeconds();
	
	LLViewerObject *objectp = NULL;	
	
	// Make a copy of the list in case something in idleUpdate() messes with it
	static std::vector<LLViewerObject*> idle_list;

	U32 idle_count = 0;
	
	{
 		for (std::vector<LLPointer<LLViewerObject> >::iterator active_iter = mActiveObjects.begin();
			active_iter != mActiveObjects.end(); active_iter++)
		{
			objectp = *active_iter;
			if (objectp)
			{
				if (idle_count >= idle_list.size())
				{
                    idle_list.push_back( objectp );
                }
			else
				{
					idle_list[idle_count] = objectp;
				}
				++idle_count;
			}
			else
			{	// There shouldn't be any NULL pointers in the list, but they have caused
				// crashes before.  This may be idleUpdate() messing with the list.
				LL_WARNS() << "LLViewerObjectList::update has a NULL objectp" << LL_ENDL;
			}
		}
	}

	std::vector<LLViewerObject*>::iterator idle_end = idle_list.begin()+idle_count;

	if (freeze_time_cc)
	{
		
		for (std::vector<LLViewerObject*>::iterator iter = idle_list.begin();
			iter != idle_end; iter++)
		{
			objectp = *iter;
			if (objectp->isAvatar())
			{
				objectp->idleUpdate(agent, frame_time);
			}
		}
	}
	else
	{
		for (std::vector<LLViewerObject*>::iterator idle_iter = idle_list.begin();
			idle_iter != idle_end; idle_iter++)
		{
			objectp = *idle_iter;
			llassert(objectp->isActive());
                objectp->idleUpdate(agent, frame_time);
		}

		//update flexible objects
		LLVolumeImplFlexible::updateClass();

		//update animated textures
		if (gAnimateTextures)
		{
			LLViewerTextureAnim::updateClass();
		}
	}



	fetchObjectCosts();
	fetchPhysicsFlags();

	// update max computed render cost
	LLVOVolume::updateRenderComplexity();

	// compute all sorts of time-based stats
	// don't factor frames that were paused into the stats
	if (! mWasPaused)
	{
		LLViewerStats::getInstance()->updateFrameStats(time_diff);
	}

	/*
	// Debugging code for viewing orphans, and orphaned parents
	LLUUID id;
	for (i = 0; i < mOrphanParents.size(); i++)
	{
		id = sIndexAndLocalIDToUUID[mOrphanParents[i]];
		LLViewerObject *objectp = findObject(id);
		if (objectp)
		{
			std::string id_str;
			objectp->mID.toString(id_str);
			std::string tmpstr = std::string("Par:	") + id_str;
			addDebugBeacon(objectp->getPositionAgent(),
							tmpstr,
							LLColor4(1.f,0.f,0.f,1.f),
							LLColor4(1.f,1.f,1.f,1.f));
		}
	}

	LLColor4 text_color;
	for (i = 0; i < mOrphanChildren.size(); i++)
	{
		OrphanInfo oi = mOrphanChildren[i];
		LLViewerObject *objectp = findObject(oi.mChildInfo);
		if (objectp)
		{
			std::string id_str;
			objectp->mID.toString(id_str);
			std::string tmpstr;
			if (objectp->getParent())
			{
				tmpstr = std::string("ChP:	") + id_str;
				text_color = LLColor4(0.f, 1.f, 0.f, 1.f);
			}
			else
			{
				tmpstr = std::string("ChNoP:	") + id_str;
				text_color = LLColor4(1.f, 0.f, 0.f, 1.f);
			}
			id = sIndexAndLocalIDToUUID[oi.mParentInfo];
			addDebugBeacon(objectp->getPositionAgent() + LLVector3(0.f, 0.f, -0.25f),
							tmpstr,
							LLColor4(0.25f,0.25f,0.25f,1.f),
							text_color);
		}
		i++;
	}
	*/

	sample(LLStatViewer::NUM_OBJECTS, mObjects.size());
	sample(LLStatViewer::NUM_ACTIVE_OBJECTS, idle_count);
}

void LLViewerObjectList::fetchObjectCosts()
{
	// issue http request for stale object physics costs
	if (!mStaleObjectCost.empty())
	{
		LLViewerRegion* regionp = gAgent.getRegion();

		if (regionp)
		{
			std::string url = regionp->getCapability("GetObjectCost");

			if (!url.empty())
			{
                LLCoros::instance().launch("LLViewerObjectList::fetchObjectCostsCoro",
                    boost::bind(&LLViewerObjectList::fetchObjectCostsCoro, this, url));
			}
			else
			{
				mStaleObjectCost.clear();
				mPendingObjectCost.clear();
			}
		}
	}
}

/*static*/
void LLViewerObjectList::reportObjectCostFailure(LLSD &objectList)
{
    // TODO*: No more hard coding
    for (LLSD::array_iterator it = objectList.beginArray(); it != objectList.endArray(); ++it)
    {
        gObjectList.onObjectCostFetchFailure(it->asUUID());
    }
}


void LLViewerObjectList::fetchObjectCostsCoro(std::string url)
{
    LLCore::HttpRequest::policy_t httpPolicy(LLCore::HttpRequest::DEFAULT_POLICY_ID);
    LLCoreHttpUtil::HttpCoroutineAdapter::ptr_t
        httpAdapter(new LLCoreHttpUtil::HttpCoroutineAdapter("genericPostCoro", httpPolicy));
    LLCore::HttpRequest::ptr_t httpRequest(new LLCore::HttpRequest);



    uuid_set_t diff;

    std::set_difference(mStaleObjectCost.begin(), mStaleObjectCost.end(),
        mPendingObjectCost.begin(), mPendingObjectCost.end(), 
        std::inserter(diff, diff.begin()));

    mStaleObjectCost.clear();

    if (diff.empty())
    {
        LL_INFOS() << "No outstanding object IDs to request. Pending count: " << mPendingObjectCost.size() << LL_ENDL;
        return;
    }

    LLSD idList(LLSD::emptyArray());

    for (uuid_set_t::iterator it = diff.begin(); it != diff.end(); ++it)
    {
        idList.append(*it);
    }

    mPendingObjectCost.insert(diff.begin(), diff.end());

    LLSD postData = LLSD::emptyMap();

    postData["object_ids"] = idList;

    LLSD result = httpAdapter->postAndSuspend(httpRequest, url, postData);

    LLSD httpResults = result[LLCoreHttpUtil::HttpCoroutineAdapter::HTTP_RESULTS];
    LLCore::HttpStatus status = LLCoreHttpUtil::HttpCoroutineAdapter::getStatusFromLLSD(httpResults);

    if (!status || result.has("error"))
    {
        if (result.has("error"))
        {
            LL_WARNS() << "Application level error when fetching object "
                << "cost.  Message: " << result["error"]["message"].asString()
                << ", identifier: " << result["error"]["identifier"].asString()
                << LL_ENDL;

            // TODO*: Adaptively adjust request size if the
            // service says we've requested too many and retry
        }
        reportObjectCostFailure(idList);

        return;
    }

    // Success, grab the resource cost and linked set costs
    // for an object if one was returned
    for (LLSD::array_iterator it = idList.beginArray(); it != idList.endArray(); ++it)
    {
        LLUUID objectId = it->asUUID();

        // Object could have been added to the mStaleObjectCost after request started
        mStaleObjectCost.erase(objectId);
        mPendingObjectCost.erase(objectId);

        // Check to see if the request contains data for the object
        if (result.has(it->asString()))
        {
            LLSD objectData = result[it->asString()];

            F32 linkCost = objectData["linked_set_resource_cost"].asReal();
            F32 objectCost = objectData["resource_cost"].asReal();
            F32 physicsCost = objectData["physics_cost"].asReal();
            F32 linkPhysicsCost = objectData["linked_set_physics_cost"].asReal();

            gObjectList.updateObjectCost(objectId, objectCost, linkCost, physicsCost, linkPhysicsCost);
        }
        else
        {
            // TODO*: Give user feedback about the missing data?
            gObjectList.onObjectCostFetchFailure(objectId);
        }
    }

}

void LLViewerObjectList::fetchPhysicsFlags()
{
	// issue http request for stale object physics flags
	if (!mStalePhysicsFlags.empty())
	{
		LLViewerRegion* regionp = gAgent.getRegion();

		if (regionp)
		{
			std::string url = regionp->getCapability("GetObjectPhysicsData");

			if (!url.empty())
			{
                LLCoros::instance().launch("LLViewerObjectList::fetchPhisicsFlagsCoro",
                    boost::bind(&LLViewerObjectList::fetchPhisicsFlagsCoro, this, url));
			}
			else
			{
				mStalePhysicsFlags.clear();
				mPendingPhysicsFlags.clear();
			}
		}
	}
}

/*static*/
void LLViewerObjectList::reportPhysicsFlagFailure(LLSD &objectList)
{
    // TODO*: No more hard coding
    for (LLSD::array_iterator it = objectList.beginArray(); it != objectList.endArray(); ++it)
    {
        gObjectList.onPhysicsFlagsFetchFailure(it->asUUID());
    }
}

void LLViewerObjectList::fetchPhisicsFlagsCoro(std::string url)
{
    LLCore::HttpRequest::policy_t httpPolicy(LLCore::HttpRequest::DEFAULT_POLICY_ID);
    LLCoreHttpUtil::HttpCoroutineAdapter::ptr_t
        httpAdapter(new LLCoreHttpUtil::HttpCoroutineAdapter("genericPostCoro", httpPolicy));
    LLCore::HttpRequest::ptr_t httpRequest(new LLCore::HttpRequest);

    LLSD idList;
    U32 objectIndex = 0;

    for (uuid_set_t::iterator it = mStalePhysicsFlags.begin(); it != mStalePhysicsFlags.end();)
    {
        // Check to see if a request for this object
        // has already been made.
        if (mPendingPhysicsFlags.find(*it) == mPendingPhysicsFlags.end())
        {
            mPendingPhysicsFlags.insert(*it);
            idList[objectIndex++] = *it;
        }

        mStalePhysicsFlags.erase(it++);

        if (objectIndex >= MAX_CONCURRENT_PHYSICS_REQUESTS)
        {
            break;
        }
    }

    if (idList.size() < 1)
    {
        LL_INFOS() << "No outstanding object physics flags to request." << LL_ENDL;
        return;
    }

    LLSD postData = LLSD::emptyMap();

    postData["object_ids"] = idList;

    LLSD result = httpAdapter->postAndSuspend(httpRequest, url, postData);

    LLSD httpResults = result[LLCoreHttpUtil::HttpCoroutineAdapter::HTTP_RESULTS];
    LLCore::HttpStatus status = LLCoreHttpUtil::HttpCoroutineAdapter::getStatusFromLLSD(httpResults);

    if (!status || result.has("error"))
    {
        if (result.has("error"))
        {
            LL_WARNS() << "Application level error when fetching object "
                << "physics flags.  Message: " << result["error"]["message"].asString()
                << ", identifier: " << result["error"]["identifier"].asString()
                << LL_ENDL;

            // TODO*: Adaptively adjust request size if the
            // service says we've requested too many and retry
        }
        reportPhysicsFlagFailure(idList);

        return;
    }

    // Success, grab the resource cost and linked set costs
    // for an object if one was returned
    for (LLSD::array_iterator it = idList.beginArray(); it != idList.endArray(); ++it)
    {
        LLUUID objectId = it->asUUID();

        // Check to see if the request contains data for the object
        if (result.has(it->asString()))
        {
            const LLSD& data = result[it->asString()];

            S32 shapeType = data["PhysicsShapeType"].asInteger();

            gObjectList.updatePhysicsShapeType(objectId, shapeType);

            if (data.has("Density"))
            {
                F32 density = data["Density"].asReal();
                F32 friction = data["Friction"].asReal();
                F32 restitution = data["Restitution"].asReal();
                F32 gravityMult = data["GravityMultiplier"].asReal();

                gObjectList.updatePhysicsProperties(objectId, density, 
                    friction, restitution, gravityMult);
            }
        }
        else
        {
            // TODO*: Give user feedback about the missing data?
            gObjectList.onPhysicsFlagsFetchFailure(objectId);
        }
    }
}

void LLViewerObjectList::clearDebugText()
{
	for (vobj_list_t::iterator iter = mObjects.begin(); iter != mObjects.end(); ++iter)
	{
		(*iter)->restoreHudText();
	}
}


void LLViewerObjectList::cleanupReferences(LLViewerObject *objectp)
{
	LL_PROFILE_ZONE_SCOPED_CATEGORY_NETWORK;

	bool new_dead_object = true;
	if (mDeadObjects.find(objectp->mID) != mDeadObjects.end())
	{
		LL_INFOS() << "Object " << objectp->mID << " already on dead list!" << LL_ENDL;	
		new_dead_object = false;
	}
	else
	{
		mDeadObjects.insert(objectp->mID);
	}

	// Cleanup any references we have to this object
	// Remove from object map so noone can look it up.

    LL_DEBUGS("ObjectUpdate") << " dereferencing id " << objectp->mID << LL_ENDL;
    dumpStack("ObjectUpdateStack");
    
	mUUIDObjectMap.erase(objectp->mID);
	
	//if (objectp->getRegion())
	//{
	//	LL_INFOS() << "cleanupReferences removing object from table, local ID " << objectp->mLocalID << ", ip " 
	//				<< objectp->getRegion()->getHost().getAddress() << ":" 
	//				<< objectp->getRegion()->getHost().getPort() << LL_ENDL;
	//}	
	
	removeFromLocalIDTable(objectp);

	if (objectp->onActiveList())
	{
		//LL_INFOS() << "Removing " << objectp->mID << " " << objectp->getPCodeString() << " from active list in cleanupReferences." << LL_ENDL;
		objectp->setOnActiveList(FALSE);
		removeFromActiveList(objectp);
	}

	if (objectp->isOnMap())
	{
		removeFromMap(objectp);
	}

	// Don't clean up mObject references, these will be cleaned up more efficiently later!
	
	if(new_dead_object)
	{
		mNumDeadObjects++;
	}
}

BOOL LLViewerObjectList::killObject(LLViewerObject *objectp)
{
	// Don't ever kill gAgentAvatarp, just force it to the agent's region
	// unless region is NULL which is assumed to mean you are logging out.
	if ((objectp == gAgentAvatarp) && gAgent.getRegion())
	{
		objectp->setRegion(gAgent.getRegion());
		return FALSE;
	}

	// When we're killing objects, all we do is mark them as dead.
	// We clean up the dead objects later.

	if (objectp)
	{
		// We are going to cleanup a lot of smart pointers to this object, they might be last,
		// and object being NULLed while inside it's own function won't be pretty
		// so create a pointer to make sure object will stay alive untill markDead() finishes
		LLPointer<LLViewerObject> sp(objectp);
		sp->markDead(); // does the right thing if object already dead
		return TRUE;
	}

	return FALSE;
}

void LLViewerObjectList::killObjects(LLViewerRegion *regionp)
{
	LLViewerObject *objectp;

	
	for (vobj_list_t::iterator iter = mObjects.begin(); iter != mObjects.end(); ++iter)
	{
		objectp = *iter;
		
		if (objectp->mRegionp == regionp)
		{
			killObject(objectp);
		}
	}

	// Have to clean right away because the region is becoming invalid.
	cleanDeadObjects(FALSE);
}

void LLViewerObjectList::killAllObjects()
{
	// Used only on global destruction.
	LLViewerObject *objectp;

	for (vobj_list_t::iterator iter = mObjects.begin(); iter != mObjects.end(); ++iter)
	{
		objectp = *iter;
		killObject(objectp);
		// Object must be dead, or it's the LLVOAvatarSelf which never dies.
		llassert((objectp == gAgentAvatarp) || objectp->isDead());
	}

	cleanDeadObjects(FALSE);

	if(!mObjects.empty())
	{
		LL_WARNS() << "LLViewerObjectList::killAllObjects still has entries in mObjects: " << mObjects.size() << LL_ENDL;
		mObjects.clear();
	}

	if (!mActiveObjects.empty())
	{
		LL_WARNS() << "Some objects still on active object list!" << LL_ENDL;
		mActiveObjects.clear();
	}

	if (!mMapObjects.empty())
	{
		LL_WARNS() << "Some objects still on map object list!" << LL_ENDL;
		mMapObjects.clear();
	}
}

void LLViewerObjectList::cleanDeadObjects(BOOL use_timer)
{
	if (!mNumDeadObjects)
	{
		// No dead objects, don't need to scan object list.
		return;
	}

	S32 num_removed = 0;
	LLViewerObject *objectp;
	
	vobj_list_t::reverse_iterator target = mObjects.rbegin();

	vobj_list_t::iterator iter = mObjects.begin();
	for ( ; iter != mObjects.end(); )
	{
		// Scan for all of the dead objects and put them all on the end of the list with no ref count ops
		objectp = *iter;
		if (objectp == NULL)
		{ //we caught up to the dead tail
			break;
		}

		if (objectp->isDead())
		{
			LLPointer<LLViewerObject>::swap(*iter, *target);
			*target = NULL;
			++target;
			num_removed++;

			if (num_removed == mNumDeadObjects || iter->isNull())
			{
				// We've cleaned up all of the dead objects or caught up to the dead tail
				break;
			}
		}
		else
		{
			++iter;
		}
	}

	llassert(num_removed == mNumDeadObjects);

	//erase as a block
	mObjects.erase(mObjects.begin()+(mObjects.size()-mNumDeadObjects), mObjects.end());

	// We've cleaned the global object list, now let's do some paranoia testing on objects
	// before blowing away the dead list.
	mDeadObjects.clear();
	mNumDeadObjects = 0;
}

void LLViewerObjectList::removeFromActiveList(LLViewerObject* objectp)
{
	S32 idx = objectp->getListIndex();
	if (idx != -1)
	{ //remove by moving last element to this object's position
		llassert(mActiveObjects[idx] == objectp);
		
		objectp->setListIndex(-1);

		S32 last_index = mActiveObjects.size()-1;

		if (idx != last_index)
		{
			mActiveObjects[idx] = mActiveObjects[last_index];
			mActiveObjects[idx]->setListIndex(idx);
		}

		mActiveObjects.pop_back();
	}
}

void LLViewerObjectList::updateActive(LLViewerObject *objectp)
{
	LL_PROFILE_ZONE_SCOPED_CATEGORY_DRAWABLE;

	if (objectp->isDead())
	{
		return; // We don't update dead objects!
	}

	BOOL active = objectp->isActive();
	if (active != objectp->onActiveList())
	{
		if (active)
		{
			//LL_INFOS() << "Adding " << objectp->mID << " " << objectp->getPCodeString() << " to active list." << LL_ENDL;
			S32 idx = objectp->getListIndex();
			if (idx <= -1)
			{
				mActiveObjects.push_back(objectp);
				objectp->setListIndex(mActiveObjects.size()-1);
			objectp->setOnActiveList(TRUE);
		}
		else
		{
				llassert(idx < mActiveObjects.size());
				llassert(mActiveObjects[idx] == objectp);

				if (idx >= mActiveObjects.size() ||
					mActiveObjects[idx] != objectp)
				{
					LL_WARNS() << "Invalid object list index detected!" << LL_ENDL;
				}
			}
		}
		else
		{
			//LL_INFOS() << "Removing " << objectp->mID << " " << objectp->getPCodeString() << " from active list." << LL_ENDL;
			removeFromActiveList(objectp);
			objectp->setOnActiveList(FALSE);
		}
	}

	//post condition: if object is active, it must be on the active list
	llassert(!active || std::find(mActiveObjects.begin(), mActiveObjects.end(), objectp) != mActiveObjects.end());

	//post condition: if object is not active, it must not be on the active list
	llassert(active || std::find(mActiveObjects.begin(), mActiveObjects.end(), objectp) == mActiveObjects.end());
}

void LLViewerObjectList::updateObjectCost(LLViewerObject* object)
{
	if (!object->isRoot())
	{ //always fetch cost for the parent when fetching cost for children
		mStaleObjectCost.insert(((LLViewerObject*)object->getParent())->getID());
	}
	mStaleObjectCost.insert(object->getID());
}

void LLViewerObjectList::updateObjectCost(const LLUUID& object_id, F32 object_cost, F32 link_cost, F32 physics_cost, F32 link_physics_cost)
{
	LLViewerObject* object = findObject(object_id);
	if (object)
	{
		object->setObjectCost(object_cost);
		object->setLinksetCost(link_cost);
		object->setPhysicsCost(physics_cost);
		object->setLinksetPhysicsCost(link_physics_cost);
	}
}

void LLViewerObjectList::onObjectCostFetchFailure(const LLUUID& object_id)
{
	//LL_WARNS() << "Failed to fetch object cost for object: " << object_id << LL_ENDL;
	mPendingObjectCost.erase(object_id);
}

void LLViewerObjectList::updatePhysicsFlags(const LLViewerObject* object)
{
	mStalePhysicsFlags.insert(object->getID());
}

void LLViewerObjectList::updatePhysicsShapeType(const LLUUID& object_id, S32 type)
{
	mPendingPhysicsFlags.erase(object_id);
	LLViewerObject* object = findObject(object_id);
	if (object)
	{
		object->setPhysicsShapeType(type);
	}
}

void LLViewerObjectList::updatePhysicsProperties(const LLUUID& object_id, 
												F32 density,
												F32 friction,
												F32 restitution,
												F32 gravity_multiplier)
{
	mPendingPhysicsFlags.erase(object_id);

	LLViewerObject* object = findObject(object_id);
	if (object)
	{
		object->setPhysicsDensity(density);
		object->setPhysicsFriction(friction);
		object->setPhysicsGravity(gravity_multiplier);
		object->setPhysicsRestitution(restitution);
	}
}

void LLViewerObjectList::onPhysicsFlagsFetchFailure(const LLUUID& object_id)
{
	//LL_WARNS() << "Failed to fetch physics flags for object: " << object_id << LL_ENDL;
	mPendingPhysicsFlags.erase(object_id);
}

void LLViewerObjectList::shiftObjects(const LLVector3 &offset)
{
    LL_PROFILE_ZONE_SCOPED_CATEGORY_NETWORK;
	// This is called when we shift our origin when we cross region boundaries...
	// We need to update many object caches, I'll document this more as I dig through the code
	// cleaning things out...

	if (0 == offset.magVecSquared())
	{
		return;
	}


	LLViewerObject *objectp;
	for (vobj_list_t::iterator iter = mObjects.begin(); iter != mObjects.end(); ++iter)
	{
		objectp = *iter;
		// There could be dead objects on the object list, so don't update stuff if the object is dead.
		if (!objectp->isDead())
		{
			objectp->updatePositionCaches();

			if (objectp->mDrawable.notNull() && !objectp->mDrawable->isDead())
			{
				gPipeline.markShift(objectp->mDrawable);
			}
		}
	}

	gPipeline.shiftObjects(offset);
	
	LLWorld::getInstance()->shiftRegions(offset);
}

void LLViewerObjectList::repartitionObjects()
{
	for (vobj_list_t::iterator iter = mObjects.begin(); iter != mObjects.end(); ++iter)
	{
		LLViewerObject* objectp = *iter;
		if (!objectp->isDead())
		{
			LLDrawable* drawable = objectp->mDrawable;
			if (drawable && !drawable->isDead())
			{
				drawable->updateBinRadius();
				drawable->updateSpatialExtents();
				drawable->movePartition();
			}
		}
	}
}

//debug code
bool LLViewerObjectList::hasMapObjectInRegion(LLViewerRegion* regionp) 
{
	for (vobj_list_t::iterator iter = mMapObjects.begin(); iter != mMapObjects.end(); ++iter)
	{
		LLViewerObject* objectp = *iter;

		if(objectp->isDead() || objectp->getRegion() == regionp)
		{
			return true ;
		}
	}

	return false ;
}

//make sure the region is cleaned up.
void LLViewerObjectList::clearAllMapObjectsInRegion(LLViewerRegion* regionp) 
{
	std::set<LLViewerObject*> dead_object_list ;
	std::set<LLViewerObject*> region_object_list ;
	for (vobj_list_t::iterator iter = mMapObjects.begin(); iter != mMapObjects.end(); ++iter)
	{
		LLViewerObject* objectp = *iter;

		if(objectp->isDead())
		{
			dead_object_list.insert(objectp) ;			
		}
		else if(objectp->getRegion() == regionp)
		{
			region_object_list.insert(objectp) ;
		}
	}

	if(dead_object_list.size() > 0)
	{
		LL_WARNS() << "There are " << dead_object_list.size() << " dead objects on the map!" << LL_ENDL ;

		for(std::set<LLViewerObject*>::iterator iter = dead_object_list.begin(); iter != dead_object_list.end(); ++iter)
		{
			cleanupReferences(*iter) ;
		}
	}
	if(region_object_list.size() > 0)
	{
		LL_WARNS() << "There are " << region_object_list.size() << " objects not removed from the deleted region!" << LL_ENDL ;

		for(std::set<LLViewerObject*>::iterator iter = region_object_list.begin(); iter != region_object_list.end(); ++iter)
		{
			(*iter)->markDead() ;
		}
	}
}


void LLViewerObjectList::renderObjectsForMap(LLNetMap &netmap)
{
	LLColor4 above_water_color = LLUIColorTable::instance().getColor( "NetMapOtherOwnAboveWater" );
	LLColor4 below_water_color = LLUIColorTable::instance().getColor( "NetMapOtherOwnBelowWater" );
	LLColor4 you_own_above_water_color = 
						LLUIColorTable::instance().getColor( "NetMapYouOwnAboveWater" );
	LLColor4 you_own_below_water_color = 
						LLUIColorTable::instance().getColor( "NetMapYouOwnBelowWater" );
	LLColor4 group_own_above_water_color = 
						LLUIColorTable::instance().getColor( "NetMapGroupOwnAboveWater" );
	LLColor4 group_own_below_water_color = 
						LLUIColorTable::instance().getColor( "NetMapGroupOwnBelowWater" );

	F32 max_radius = gSavedSettings.getF32("MiniMapPrimMaxRadius");

	for (vobj_list_t::iterator iter = mMapObjects.begin(); iter != mMapObjects.end(); ++iter)
	{
		LLViewerObject* objectp = *iter;

		if(objectp->isDead())//some dead objects somehow not cleaned.
		{
			continue ;
		}

		if (!objectp->getRegion() || objectp->isOrphaned() || objectp->isAttachment())
		{
			continue;
		}
		const LLVector3& scale = objectp->getScale();
		const LLVector3d pos = objectp->getPositionGlobal();
		const F64 water_height = F64( objectp->getRegion()->getWaterHeight() );
		// LLWorld::getInstance()->getWaterHeight();

		F32 approx_radius = (scale.mV[VX] + scale.mV[VY]) * 0.5f * 0.5f * 1.3f;  // 1.3 is a fudge

		// Limit the size of megaprims so they don't blot out everything on the minimap.
		// Attempting to draw very large megaprims also causes client lag.
		// See DEV-17370 and DEV-29869/SNOW-79 for details.
		approx_radius = llmin(approx_radius, max_radius);

		LLColor4U color = above_water_color;
		if( objectp->permYouOwner() )
		{
			const F32 MIN_RADIUS_FOR_OWNED_OBJECTS = 2.f;
			if( approx_radius < MIN_RADIUS_FOR_OWNED_OBJECTS )
			{
				approx_radius = MIN_RADIUS_FOR_OWNED_OBJECTS;
			}

			if( pos.mdV[VZ] >= water_height )
			{
				if ( objectp->permGroupOwner() )
				{
					color = group_own_above_water_color;
				}
				else
				{
				color = you_own_above_water_color;
			}
			}
			else
			{
				if ( objectp->permGroupOwner() )
				{
					color = group_own_below_water_color;
				}
			else
			{
				color = you_own_below_water_color;
			}
		}
		}
		else
		if( pos.mdV[VZ] < water_height )
		{
			color = below_water_color;
		}

		netmap.renderScaledPointGlobal( 
			pos, 
			color,
			approx_radius );
	}
}

void LLViewerObjectList::renderObjectBounds(const LLVector3 &center)
{
}

void LLViewerObjectList::addDebugBeacon(const LLVector3 &pos_agent,
										const std::string &string,
										const LLColor4 &color,
										const LLColor4 &text_color,
										S32 line_width)
{
	LLDebugBeacon beacon;
	beacon.mPositionAgent = pos_agent;
	beacon.mString = string;
	beacon.mColor = color;
	beacon.mTextColor = text_color;
	beacon.mLineWidth = line_width;

	mDebugBeacons.push_back(beacon);
}

void LLViewerObjectList::resetObjectBeacons()
{
	mDebugBeacons.clear();
}

LLViewerObject *LLViewerObjectList::createObjectViewer(const LLPCode pcode, LLViewerRegion *regionp, S32 flags)
{
	LLUUID fullid;
	fullid.generate();

	LLViewerObject *objectp = LLViewerObject::createObject(fullid, pcode, regionp, flags);
	if (!objectp)
	{
// 		LL_WARNS() << "Couldn't create object of type " << LLPrimitive::pCodeToString(pcode) << LL_ENDL;
		return NULL;
	}

	mUUIDObjectMap[fullid] = objectp;

	mObjects.push_back(objectp);

	updateActive(objectp);

	return objectp;
}

LLViewerObject *LLViewerObjectList::createObjectFromCache(const LLPCode pcode, LLViewerRegion *regionp, const LLUUID &uuid, const U32 local_id)
{
	llassert_always(uuid.notNull());

    LL_DEBUGS("ObjectUpdate") << "creating " << uuid << " local_id " << local_id << LL_ENDL;
    dumpStack("ObjectUpdateStack");
    
	LLViewerObject *objectp = LLViewerObject::createObject(uuid, pcode, regionp);
	if (!objectp)
	{
// 		LL_WARNS() << "Couldn't create object of type " << LLPrimitive::pCodeToString(pcode) << " id:" << fullid << LL_ENDL;
		return NULL;
	}

	objectp->mLocalID = local_id;
	mUUIDObjectMap[uuid] = objectp;
	setUUIDAndLocal(uuid,
					local_id,
					regionp->getHost().getAddress(),
					regionp->getHost().getPort());
	mObjects.push_back(objectp);
	
	updateActive(objectp);

	return objectp;
}

LLViewerObject *LLViewerObjectList::createObject(const LLPCode pcode, LLViewerRegion *regionp,
												 const LLUUID &uuid, const U32 local_id, const LLHost &sender)
{
	LLUUID fullid;
	if (uuid == LLUUID::null)
	{
		fullid.generate();
	}
	else
	{
		fullid = uuid;
	}

    LL_DEBUGS("ObjectUpdate") << "createObject creating " << fullid << LL_ENDL;
    dumpStack("ObjectUpdateStack");

	LLViewerObject *objectp = LLViewerObject::createObject(fullid, pcode, regionp);
	if (!objectp)
	{
// 		LL_WARNS() << "Couldn't create object of type " << LLPrimitive::pCodeToString(pcode) << " id:" << fullid << LL_ENDL;
		return NULL;
	}
	if(regionp)
	{
		regionp->addToCreatedList(local_id); 
	}

	mUUIDObjectMap[fullid] = objectp;
	setUUIDAndLocal(fullid,
					local_id,
					gMessageSystem->getSenderIP(),
					gMessageSystem->getSenderPort());

	mObjects.push_back(objectp);

	updateActive(objectp);

	return objectp;
}

LLViewerObject *LLViewerObjectList::replaceObject(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp)
{
	LLViewerObject *old_instance = findObject(id);
	if (old_instance)
	{
		//cleanupReferences(old_instance);
		old_instance->markDead();
		
		return createObject(pcode, regionp, id, old_instance->getLocalID(), LLHost());
	}
	return NULL;
}

S32 LLViewerObjectList::findReferences(LLDrawable *drawablep) const
{
	LL_PROFILE_ZONE_SCOPED_CATEGORY_DRAWABLE;

	LLViewerObject *objectp;
	S32 num_refs = 0;
	
	for (vobj_list_t::const_iterator iter = mObjects.begin(); iter != mObjects.end(); ++iter)
	{
		objectp = *iter;
		if (objectp->mDrawable.notNull())
		{
			num_refs += objectp->mDrawable->findReferences(drawablep);
		}
	}
	return num_refs;
}


void LLViewerObjectList::orphanize(LLViewerObject *childp, U32 parent_id, U32 ip, U32 port)
{
	LL_DEBUGS("ORPHANS") << "Orphaning object " << childp->getID() << " with parent " << parent_id << LL_ENDL;

	// We're an orphan, flag things appropriately.
	childp->mOrphaned = TRUE;
	if (childp->mDrawable.notNull())
	{
		bool make_invisible = true;
		LLViewerObject *parentp = (LLViewerObject *)childp->getParent();
		if (parentp)
		{
			if (parentp->getRegion() != childp->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).
				make_invisible = false;
				//LL_INFOS() << "Don't make object handoffs invisible!" << LL_ENDL;
			}
		}

		if (make_invisible)
		{
			// Make sure that this object becomes invisible if it's an orphan
			childp->mDrawable->setState(LLDrawable::FORCE_INVISIBLE);
		}
	}

	// Unknown parent, add to orpaned child list
	U64 parent_info = getIndex(parent_id, ip, port);

	if (std::find(mOrphanParents.begin(), mOrphanParents.end(), parent_info) == mOrphanParents.end())
	{
		mOrphanParents.push_back(parent_info);
	}

	LLViewerObjectList::OrphanInfo oi(parent_info, childp->mID);
	if (std::find(mOrphanChildren.begin(), mOrphanChildren.end(), oi) == mOrphanChildren.end())
	{
		mOrphanChildren.push_back(oi);
		mNumOrphans++;
	}
}


void LLViewerObjectList::findOrphans(LLViewerObject* objectp, U32 ip, U32 port)
{
	LL_PROFILE_ZONE_SCOPED_CATEGORY_NETWORK;

	if (objectp->isDead())
	{
		LL_WARNS() << "Trying to find orphans for dead obj " << objectp->mID 
			<< ":" << objectp->getPCodeString() << LL_ENDL;
		return;
	}

	//search object cache to get orphans
	if(objectp->getRegion())
	{
		objectp->getRegion()->findOrphans(objectp->getLocalID());
	}

	// See if we are a parent of an orphan.
	// Note:  This code is fairly inefficient but it should happen very rarely.
	// It can be sped up if this is somehow a performance issue...
	if (mOrphanParents.empty())
	{
		// no known orphan parents
		return;
	}
	if (std::find(mOrphanParents.begin(), mOrphanParents.end(), getIndex(objectp->mLocalID, ip, port)) == mOrphanParents.end())
	{
		// did not find objectp in OrphanParent list
		return;
	}

	U64 parent_info = getIndex(objectp->mLocalID, ip, port);
	BOOL orphans_found = FALSE;
	// Iterate through the orphan list, and set parents of matching children.

	for (std::vector<OrphanInfo>::iterator iter = mOrphanChildren.begin(); iter != mOrphanChildren.end(); )
	{	
		if (iter->mParentInfo != parent_info)
		{
			++iter;
			continue;
		}
		LLViewerObject *childp = findObject(iter->mChildInfo);
		if (childp)
		{
			if (childp == objectp)
			{
				LL_WARNS() << objectp->mID << " has self as parent, skipping!" 
					<< LL_ENDL;
				continue;
			}

			LL_DEBUGS("ORPHANS") << "Reunited parent " << objectp->mID 
				<< " with child " << childp->mID << LL_ENDL;
			LL_DEBUGS("ORPHANS") << "Glob: " << objectp->getPositionGlobal() << LL_ENDL;
			LL_DEBUGS("ORPHANS") << "Agent: " << objectp->getPositionAgent() << LL_ENDL;
#ifdef ORPHAN_SPAM
			addDebugBeacon(objectp->getPositionAgent(),"");
#endif
			gPipeline.markMoved(objectp->mDrawable);				
			objectp->setChanged(LLXform::MOVED | LLXform::SILHOUETTE);

			// Flag the object as no longer orphaned
			childp->mOrphaned = FALSE;
			if (childp->mDrawable.notNull())
			{
				// Make the drawable visible again and set the drawable parent
				childp->mDrawable->clearState(LLDrawable::FORCE_INVISIBLE);
				childp->setDrawableParent(objectp->mDrawable); // LLViewerObjectList::findOrphans()
				gPipeline.markRebuild( childp->mDrawable, LLDrawable::REBUILD_ALL, TRUE );
			}

			// Make certain particles, icon and HUD aren't hidden
			childp->hideExtraDisplayItems( FALSE );

			objectp->addChild(childp);
			orphans_found = TRUE;
			++iter;
		}
		else
		{
			LL_INFOS() << "Missing orphan child, removing from list" << LL_ENDL;

			iter = mOrphanChildren.erase(iter);
		}
	}

	// Remove orphan parent and children from lists now that they've been found
	{
		std::vector<U64>::iterator iter = std::find(mOrphanParents.begin(), mOrphanParents.end(), parent_info);
		if (iter != mOrphanParents.end())
		{
			mOrphanParents.erase(iter);
		}
	}
	
	for (std::vector<OrphanInfo>::iterator iter = mOrphanChildren.begin(); iter != mOrphanChildren.end(); )
	{
		if (iter->mParentInfo == parent_info)
		{
			iter = mOrphanChildren.erase(iter);
			mNumOrphans--;
		}
		else
		{
			++iter;
		}
	}

	if (orphans_found && objectp->isSelected())
	{
		LLSelectNode* nodep = LLSelectMgr::getInstance()->getSelection()->findNode(objectp);
		if (nodep && !nodep->mIndividualSelection)
		{
			// rebuild selection with orphans
			LLSelectMgr::getInstance()->deselectObjectAndFamily(objectp);
			LLSelectMgr::getInstance()->selectObjectAndFamily(objectp);
		}
	}
}

////////////////////////////////////////////////////////////////////////////

LLViewerObjectList::OrphanInfo::OrphanInfo()
	: mParentInfo(0)
{
}

LLViewerObjectList::OrphanInfo::OrphanInfo(const U64 parent_info, const LLUUID child_info)
	: mParentInfo(parent_info), mChildInfo(child_info)
{
}

bool LLViewerObjectList::OrphanInfo::operator==(const OrphanInfo &rhs) const
{
	return (mParentInfo == rhs.mParentInfo) && (mChildInfo == rhs.mChildInfo);
}

bool LLViewerObjectList::OrphanInfo::operator!=(const OrphanInfo &rhs) const
{
	return !operator==(rhs);
}


LLDebugBeacon::~LLDebugBeacon()
{
	if (mHUDObject.notNull())
	{
		mHUDObject->markDead();
	}
}
