/indra/newview/llvovolume.cpp

/** 
 * @file llvovolume.cpp
 * @brief LLVOVolume class implementation
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * 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
 * $/LicenseInfo$
 */

// A "volume" is a box, cylinder, sphere, or other primitive shape.

#include "llviewerprecompiledheaders.h"

#include "llvovolume.h"

#include <sstream>

#include "llviewercontrol.h"
#include "lldir.h"
#include "llflexibleobject.h"
#include "llfloatertools.h"
#include "llmaterialtable.h"
#include "llprimitive.h"
#include "llvolume.h"
#include "llvolumeoctree.h"
#include "llvolumemgr.h"
#include "llvolumemessage.h"
#include "material_codes.h"
#include "message.h"
#include "llpluginclassmedia.h" // for code in the mediaEvent handler
#include "object_flags.h"
#include "llagentconstants.h"
#include "lldrawable.h"
#include "lldrawpoolavatar.h"
#include "lldrawpoolbump.h"
#include "llface.h"
#include "llspatialpartition.h"
#include "llhudmanager.h"
#include "llflexibleobject.h"
#include "llsky.h"
#include "lltexturefetch.h"
#include "llvector4a.h"
#include "llviewercamera.h"
#include "llviewertexturelist.h"
#include "llviewerobjectlist.h"
#include "llviewerregion.h"
#include "llviewertextureanim.h"
#include "llworld.h"
#include "llselectmgr.h"
#include "pipeline.h"
#include "llsdutil.h"
#include "llmatrix4a.h"
#include "llmediaentry.h"
#include "llmediadataclient.h"
#include "llmeshrepository.h"
#include "llagent.h"
#include "llviewermediafocus.h"
#include "lldatapacker.h"
#include "llviewershadermgr.h"
#include "llvoavatar.h"
#include "llvocache.h"

const S32 MIN_QUIET_FRAMES_COALESCE = 30;
const F32 FORCE_SIMPLE_RENDER_AREA = 512.f;
const F32 FORCE_CULL_AREA = 8.f;
const F32 MAX_LOD_DISTANCE = 24.f;


BOOL gAnimateTextures = TRUE;
//extern BOOL gHideSelectedObjects;

F32 LLVOVolume::sLODFactor = 1.f;
F32	LLVOVolume::sLODSlopDistanceFactor = 0.5f; //Changing this to zero, effectively disables the LOD transition slop 
F32 LLVOVolume::sDistanceFactor = 1.0f;
S32 LLVOVolume::sNumLODChanges = 0;
S32 LLVOVolume::mRenderComplexity_last = 0;
S32 LLVOVolume::mRenderComplexity_current = 0;
LLPointer<LLObjectMediaDataClient> LLVOVolume::sObjectMediaClient = NULL;
LLPointer<LLObjectMediaNavigateClient> LLVOVolume::sObjectMediaNavigateClient = NULL;

static LLFastTimer::DeclareTimer FTM_GEN_TRIANGLES("Generate Triangles");
static LLFastTimer::DeclareTimer FTM_GEN_VOLUME("Generate Volumes");
static LLFastTimer::DeclareTimer FTM_VOLUME_TEXTURES("Volume Textures");

// Implementation class of LLMediaDataClientObject.  See llmediadataclient.h
class LLMediaDataClientObjectImpl : public LLMediaDataClientObject
{
public:
	LLMediaDataClientObjectImpl(LLVOVolume *obj, bool isNew) : mObject(obj), mNew(isNew) 
	{
		mObject->addMDCImpl();
	}
	~LLMediaDataClientObjectImpl()
	{
		mObject->removeMDCImpl();
	}
	
	virtual U8 getMediaDataCount() const 
		{ return mObject->getNumTEs(); }

	virtual LLSD getMediaDataLLSD(U8 index) const 
		{
			LLSD result;
			LLTextureEntry *te = mObject->getTE(index); 
			if (NULL != te)
			{
				llassert((te->getMediaData() != NULL) == te->hasMedia());
				if (te->getMediaData() != NULL)
				{
					result = te->getMediaData()->asLLSD();
					// XXX HACK: workaround bug in asLLSD() where whitelist is not set properly
					// See DEV-41949
					if (!result.has(LLMediaEntry::WHITELIST_KEY))
					{
						result[LLMediaEntry::WHITELIST_KEY] = LLSD::emptyArray();
					}
				}
			}
			return result;
		}
	virtual bool isCurrentMediaUrl(U8 index, const std::string &url) const
		{
			LLTextureEntry *te = mObject->getTE(index); 
			if (te)
			{
				if (te->getMediaData())
				{
					return (te->getMediaData()->getCurrentURL() == url);
				}
			}
			return url.empty();
		}

	virtual LLUUID getID() const
		{ return mObject->getID(); }

	virtual void mediaNavigateBounceBack(U8 index)
		{ mObject->mediaNavigateBounceBack(index); }
	
	virtual bool hasMedia() const
		{ return mObject->hasMedia(); }
	
	virtual void updateObjectMediaData(LLSD const &data, const std::string &version_string) 
		{ mObject->updateObjectMediaData(data, version_string); }
	
	virtual F64 getMediaInterest() const 
		{ 
			F64 interest = mObject->getTotalMediaInterest();
			if (interest < (F64)0.0)
			{
				// media interest not valid yet, try pixel area
				interest = mObject->getPixelArea();
				// HACK: force recalculation of pixel area if interest is the "magic default" of 1024.
				if (interest == 1024.f)
				{
					const_cast<LLVOVolume*>(static_cast<LLVOVolume*>(mObject))->setPixelAreaAndAngle(gAgent);
					interest = mObject->getPixelArea();
				}
			}
			return interest; 
		}
	
	virtual bool isInterestingEnough() const
		{
			return LLViewerMedia::isInterestingEnough(mObject, getMediaInterest());
		}

	virtual std::string getCapabilityUrl(const std::string &name) const
		{ return mObject->getRegion()->getCapability(name); }
	
	virtual bool isDead() const
		{ return mObject->isDead(); }
	
	virtual U32 getMediaVersion() const
		{ return LLTextureEntry::getVersionFromMediaVersionString(mObject->getMediaURL()); }
	
	virtual bool isNew() const
		{ return mNew; }

private:
	LLPointer<LLVOVolume> mObject;
	bool mNew;
};


LLVOVolume::LLVOVolume(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp)
	: LLViewerObject(id, pcode, regionp),
	  mVolumeImpl(NULL)
{
	mTexAnimMode = 0;
	mRelativeXform.setIdentity();
	mRelativeXformInvTrans.setIdentity();

	mFaceMappingChanged = FALSE;
	mLOD = MIN_LOD;
	mTextureAnimp = NULL;
	mVolumeChanged = FALSE;
	mVObjRadius = LLVector3(1,1,0.5f).length();
	mNumFaces = 0;
	mLODChanged = FALSE;
	mSculptChanged = FALSE;
	mSpotLightPriority = 0.f;

	mMediaImplList.resize(getNumTEs());
	mLastFetchedMediaVersion = -1;
	mIndexInTex = 0;
	mMDCImplCount = 0;
}

LLVOVolume::~LLVOVolume()
{
	delete mTextureAnimp;
	mTextureAnimp = NULL;
	delete mVolumeImpl;
	mVolumeImpl = NULL;

	if(!mMediaImplList.empty())
	{
		for(U32 i = 0 ; i < mMediaImplList.size() ; i++)
		{
			if(mMediaImplList[i].notNull())
			{
				mMediaImplList[i]->removeObject(this) ;
			}
		}
	}
}

void LLVOVolume::markDead()
{
	if (!mDead)
	{
		if(getMDCImplCount() > 0)
		{
			LLMediaDataClientObject::ptr_t obj = new LLMediaDataClientObjectImpl(const_cast<LLVOVolume*>(this), false);
			if (sObjectMediaClient) sObjectMediaClient->removeFromQueue(obj);
			if (sObjectMediaNavigateClient) sObjectMediaNavigateClient->removeFromQueue(obj);
		}
		
		// Detach all media impls from this object
		for(U32 i = 0 ; i < mMediaImplList.size() ; i++)
		{
			removeMediaImpl(i);
		}

		if (mSculptTexture.notNull())
		{
			mSculptTexture->removeVolume(this);
		}
	}
	
	LLViewerObject::markDead();
}


// static
void LLVOVolume::initClass()
{
	// gSavedSettings better be around
	if (gSavedSettings.getBOOL("PrimMediaMasterEnabled"))
	{
		const F32 queue_timer_delay = gSavedSettings.getF32("PrimMediaRequestQueueDelay");
		const F32 retry_timer_delay = gSavedSettings.getF32("PrimMediaRetryTimerDelay");
		const U32 max_retries = gSavedSettings.getU32("PrimMediaMaxRetries");
		const U32 max_sorted_queue_size = gSavedSettings.getU32("PrimMediaMaxSortedQueueSize");
		const U32 max_round_robin_queue_size = gSavedSettings.getU32("PrimMediaMaxRoundRobinQueueSize");
		sObjectMediaClient = new LLObjectMediaDataClient(queue_timer_delay, retry_timer_delay, max_retries, 
														 max_sorted_queue_size, max_round_robin_queue_size);
		sObjectMediaNavigateClient = new LLObjectMediaNavigateClient(queue_timer_delay, retry_timer_delay, 
																	 max_retries, max_sorted_queue_size, max_round_robin_queue_size);
	}
}

// static
void LLVOVolume::cleanupClass()
{
    sObjectMediaClient = NULL;
    sObjectMediaNavigateClient = NULL;
}

U32 LLVOVolume::processUpdateMessage(LLMessageSystem *mesgsys,
										  void **user_data,
										  U32 block_num, EObjectUpdateType update_type,
										  LLDataPacker *dp)
{
	LLColor4U color;
	const S32 teDirtyBits = (TEM_CHANGE_TEXTURE|TEM_CHANGE_COLOR|TEM_CHANGE_MEDIA);

	// Do base class updates...
	U32 retval = LLViewerObject::processUpdateMessage(mesgsys, user_data, block_num, update_type, dp);

	LLUUID sculpt_id;
	U8 sculpt_type = 0;
	if (isSculpted())
	{
		LLSculptParams *sculpt_params = (LLSculptParams *)getParameterEntry(LLNetworkData::PARAMS_SCULPT);
		sculpt_id = sculpt_params->getSculptTexture();
		sculpt_type = sculpt_params->getSculptType();
	}

	if (!dp)
	{
		if (update_type == OUT_FULL)
		{
			////////////////////////////////
			//
			// Unpack texture animation data
			//
			//

			if (mesgsys->getSizeFast(_PREHASH_ObjectData, block_num, _PREHASH_TextureAnim))
			{
				if (!mTextureAnimp)
				{
					mTextureAnimp = new LLViewerTextureAnim();
				}
				else
				{
					if (!(mTextureAnimp->mMode & LLTextureAnim::SMOOTH))
					{
						mTextureAnimp->reset();
					}
				}
				mTexAnimMode = 0;
				mTextureAnimp->unpackTAMessage(mesgsys, block_num);
			}
			else
			{
				if (mTextureAnimp)
				{
					delete mTextureAnimp;
					mTextureAnimp = NULL;
					gPipeline.markTextured(mDrawable);
					mFaceMappingChanged = TRUE;
					mTexAnimMode = 0;
				}
			}

			// Unpack volume data
			LLVolumeParams volume_params;
			LLVolumeMessage::unpackVolumeParams(&volume_params, mesgsys, _PREHASH_ObjectData, block_num);
			volume_params.setSculptID(sculpt_id, sculpt_type);

			if (setVolume(volume_params, 0))
			{
				markForUpdate(TRUE);
			}
		}

		// Sigh, this needs to be done AFTER the volume is set as well, otherwise bad stuff happens...
		////////////////////////////
		//
		// Unpack texture entry data
		//

		S32 result = unpackTEMessage(mesgsys, _PREHASH_ObjectData, block_num);
		if (result & teDirtyBits)
		{
			updateTEData();
		}
		if (result & TEM_CHANGE_MEDIA)
		{
			retval |= MEDIA_FLAGS_CHANGED;
		}
	}
	else
	{
		// CORY TO DO: Figure out how to get the value here
		if (update_type != OUT_TERSE_IMPROVED)
		{
			LLVolumeParams volume_params;
			BOOL res = LLVolumeMessage::unpackVolumeParams(&volume_params, *dp);
			if (!res)
			{
				llwarns << "Bogus volume parameters in object " << getID() << llendl;
				llwarns << getRegion()->getOriginGlobal() << llendl;
			}

			volume_params.setSculptID(sculpt_id, sculpt_type);

			if (setVolume(volume_params, 0))
			{
				markForUpdate(TRUE);
			}
			S32 res2 = unpackTEMessage(*dp);
			if (TEM_INVALID == res2)
			{
				// There's something bogus in the data that we're unpacking.
				dp->dumpBufferToLog();
				llwarns << "Flushing cache files" << llendl;

				if(LLVOCache::hasInstance() && getRegion())
				{
					LLVOCache::getInstance()->removeEntry(getRegion()->getHandle()) ;
				}
				
				llwarns << "Bogus TE data in " << getID() << llendl;
			}
			else 
			{
				if (res2 & teDirtyBits) 
				{
					updateTEData();
				}
				if (res2 & TEM_CHANGE_MEDIA)
				{
					retval |= MEDIA_FLAGS_CHANGED;
				}
			}

			U32 value = dp->getPassFlags();

			if (value & 0x40)
			{
				if (!mTextureAnimp)
				{
					mTextureAnimp = new LLViewerTextureAnim();
				}
				else
				{
					if (!(mTextureAnimp->mMode & LLTextureAnim::SMOOTH))
					{
						mTextureAnimp->reset();
					}
				}
				mTexAnimMode = 0;
				mTextureAnimp->unpackTAMessage(*dp);
			}
			else if (mTextureAnimp)
			{
				delete mTextureAnimp;
				mTextureAnimp = NULL;
				gPipeline.markTextured(mDrawable);
				mFaceMappingChanged = TRUE;
				mTexAnimMode = 0;
			}
		}
		else
		{
			S32 texture_length = mesgsys->getSizeFast(_PREHASH_ObjectData, block_num, _PREHASH_TextureEntry);
			if (texture_length)
			{
				U8							tdpbuffer[1024];
				LLDataPackerBinaryBuffer	tdp(tdpbuffer, 1024);
				mesgsys->getBinaryDataFast(_PREHASH_ObjectData, _PREHASH_TextureEntry, tdpbuffer, 0, block_num);
				S32 result = unpackTEMessage(tdp);
				if (result & teDirtyBits)
				{
					updateTEData();
				}
				if (result & TEM_CHANGE_MEDIA)
				{
					retval |= MEDIA_FLAGS_CHANGED;
				}
			}
		}
	}
	if (retval & (MEDIA_URL_REMOVED | MEDIA_URL_ADDED | MEDIA_URL_UPDATED | MEDIA_FLAGS_CHANGED)) 
	{
		// If only the media URL changed, and it isn't a media version URL,
		// ignore it
		if ( ! ( retval & (MEDIA_URL_ADDED | MEDIA_URL_UPDATED) &&
				 mMedia && ! mMedia->mMediaURL.empty() &&
				 ! LLTextureEntry::isMediaVersionString(mMedia->mMediaURL) ) )
		{
			// If the media changed at all, request new media data
			LL_DEBUGS("MediaOnAPrim") << "Media update: " << getID() << ": retval=" << retval << " Media URL: " <<
                ((mMedia) ?  mMedia->mMediaURL : std::string("")) << LL_ENDL;
			requestMediaDataUpdate(retval & MEDIA_FLAGS_CHANGED);
		}
        else {
            LL_INFOS("MediaOnAPrim") << "Ignoring media update for: " << getID() << " Media URL: " <<
                ((mMedia) ?  mMedia->mMediaURL : std::string("")) << LL_ENDL;
        }
	}
	// ...and clean up any media impls
	cleanUpMediaImpls();

	return retval;
}


void LLVOVolume::animateTextures()
{
	F32 off_s = 0.f, off_t = 0.f, scale_s = 1.f, scale_t = 1.f, rot = 0.f;
	S32 result = mTextureAnimp->animateTextures(off_s, off_t, scale_s, scale_t, rot);
	
	if (result)
	{
		if (!mTexAnimMode)
		{
			mFaceMappingChanged = TRUE;
			gPipeline.markTextured(mDrawable);
		}
		mTexAnimMode = result | mTextureAnimp->mMode;
				
		S32 start=0, end=mDrawable->getNumFaces()-1;
		if (mTextureAnimp->mFace >= 0 && mTextureAnimp->mFace <= end)
		{
			start = end = mTextureAnimp->mFace;
		}
		
		for (S32 i = start; i <= end; i++)
		{
			LLFace* facep = mDrawable->getFace(i);
			if(facep->getVirtualSize() <= MIN_TEX_ANIM_SIZE && facep->mTextureMatrix) continue;

			const LLTextureEntry* te = facep->getTextureEntry();
			
			if (!te)
			{
				continue;
			}
		
			if (!(result & LLViewerTextureAnim::ROTATE))
			{
				te->getRotation(&rot);
			}
			if (!(result & LLViewerTextureAnim::TRANSLATE))
			{
				te->getOffset(&off_s,&off_t);
			}			
			if (!(result & LLViewerTextureAnim::SCALE))
			{
				te->getScale(&scale_s, &scale_t);
			}

			if (!facep->mTextureMatrix)
			{
				facep->mTextureMatrix = new LLMatrix4();
			}

			LLMatrix4& tex_mat = *facep->mTextureMatrix;
			tex_mat.setIdentity();
			LLVector3 trans ;

			if(facep->isAtlasInUse())
			{
				//
				//if use atlas for animated texture
				//apply the following transform to the animation matrix.
				//

				F32 tcoord_xoffset = 0.f ;
				F32 tcoord_yoffset = 0.f ;
				F32 tcoord_xscale = 1.f ;
				F32 tcoord_yscale = 1.f ;			
				if(facep->isAtlasInUse())
				{
					const LLVector2* tmp = facep->getTexCoordOffset() ;
					tcoord_xoffset = tmp->mV[0] ; 
					tcoord_yoffset = tmp->mV[1] ;

					tmp = facep->getTexCoordScale() ;
					tcoord_xscale = tmp->mV[0] ; 
					tcoord_yscale = tmp->mV[1] ;	
				}
				trans.set(LLVector3(tcoord_xoffset + tcoord_xscale * (off_s+0.5f), tcoord_yoffset + tcoord_yscale * (off_t+0.5f), 0.f));

				tex_mat.translate(LLVector3(-(tcoord_xoffset + tcoord_xscale * 0.5f), -(tcoord_yoffset + tcoord_yscale * 0.5f), 0.f));
			}
			else	//non atlas
			{
				trans.set(LLVector3(off_s+0.5f, off_t+0.5f, 0.f));			
				tex_mat.translate(LLVector3(-0.5f, -0.5f, 0.f));
			}

			LLVector3 scale(scale_s, scale_t, 1.f);			
			LLQuaternion quat;
			quat.setQuat(rot, 0, 0, -1.f);
		
			tex_mat.rotate(quat);				

			LLMatrix4 mat;
			mat.initAll(scale, LLQuaternion(), LLVector3());
			tex_mat *= mat;
		
			tex_mat.translate(trans);
		}
	}
	else
	{
		if (mTexAnimMode && mTextureAnimp->mRate == 0)
		{
			U8 start, count;

			if (mTextureAnimp->mFace == -1)
			{
				start = 0;
				count = getNumTEs();
			}
			else
			{
				start = (U8) mTextureAnimp->mFace;
				count = 1;
			}

			for (S32 i = start; i < start + count; i++)
			{
				if (mTexAnimMode & LLViewerTextureAnim::TRANSLATE)
				{
					setTEOffset(i, mTextureAnimp->mOffS, mTextureAnimp->mOffT);				
				}
				if (mTexAnimMode & LLViewerTextureAnim::SCALE)
				{
					setTEScale(i, mTextureAnimp->mScaleS, mTextureAnimp->mScaleT);	
				}
				if (mTexAnimMode & LLViewerTextureAnim::ROTATE)
				{
					setTERotation(i, mTextureAnimp->mRot);
				}
			}

			gPipeline.markTextured(mDrawable);
			mFaceMappingChanged = TRUE;
			mTexAnimMode = 0;
		}
	}
}
BOOL LLVOVolume::idleUpdate(LLAgent &agent, LLWorld &world, const F64 &time)
{
	LLViewerObject::idleUpdate(agent, world, time);

	static LLFastTimer::DeclareTimer ftm("Volume");
	LLFastTimer t(ftm);

	if (mDead || mDrawable.isNull())
	{
		return TRUE;
	}
	
	///////////////////////
	//
	// Do texture animation stuff
	//

	if (mTextureAnimp && gAnimateTextures)
	{
		animateTextures();
	}

	// Dispatch to implementation
	if (mVolumeImpl)
	{
		mVolumeImpl->doIdleUpdate(agent, world, time);
	}

	const S32 MAX_ACTIVE_OBJECT_QUIET_FRAMES = 40;

	if (mDrawable->isActive())
	{
		if (mDrawable->isRoot() && 
			mDrawable->mQuietCount++ > MAX_ACTIVE_OBJECT_QUIET_FRAMES && 
			(!mDrawable->getParent() || !mDrawable->getParent()->isActive()))
		{
			mDrawable->makeStatic();
		}
	}

	return TRUE;
}

void LLVOVolume::updateTextures()
{
	const F32 TEXTURE_AREA_REFRESH_TIME = 5.f; // seconds
	if (mTextureUpdateTimer.getElapsedTimeF32() > TEXTURE_AREA_REFRESH_TIME)
	{
		updateTextureVirtualSize();		
	}
}

BOOL LLVOVolume::isVisible() const 
{
	if(mDrawable.notNull() && mDrawable->isVisible())
	{
		return TRUE ;
	}

	if(isAttachment())
	{
		LLViewerObject* objp = (LLViewerObject*)getParent() ;
		while(objp && !objp->isAvatar())
		{
			objp = (LLViewerObject*)objp->getParent() ;
		}

		return objp && objp->mDrawable.notNull() && objp->mDrawable->isVisible() ;
	}

	return FALSE ;
}

void LLVOVolume::updateTextureVirtualSize(bool forced)
{
	LLFastTimer ftm(FTM_VOLUME_TEXTURES);
	// Update the pixel area of all faces

	if(!forced)
	{
		if(!isVisible())
		{
			return ;
		}

		if (!gPipeline.hasRenderType(LLPipeline::RENDER_TYPE_SIMPLE))
		{
			return;
		}
	}

	static LLCachedControl<bool> dont_load_textures(gSavedSettings,"TextureDisable");
		
	if (dont_load_textures || LLAppViewer::getTextureFetch()->mDebugPause) // || !mDrawable->isVisible())
	{
		return;
	}

	mTextureUpdateTimer.reset();
	
	F32 old_area = mPixelArea;
	mPixelArea = 0.f;

	const S32 num_faces = mDrawable->getNumFaces();
	F32 min_vsize=999999999.f, max_vsize=0.f;
	LLViewerCamera* camera = LLViewerCamera::getInstance();
	for (S32 i = 0; i < num_faces; i++)
	{
		LLFace* face = mDrawable->getFace(i);
		const LLTextureEntry *te = face->getTextureEntry();
		LLViewerTexture *imagep = face->getTexture();
		if (!imagep || !te ||			
			face->mExtents[0].equals3(face->mExtents[1]))
		{
			continue;
		}
		
		F32 vsize;
		F32 old_size = face->getVirtualSize();

		if (isHUDAttachment())
		{
			F32 area = (F32) camera->getScreenPixelArea();
			vsize = area;
			imagep->setBoostLevel(LLViewerTexture::BOOST_HUD);
 			face->setPixelArea(area); // treat as full screen
			face->setVirtualSize(vsize);
		}
		else
		{
			vsize = face->getTextureVirtualSize();
		}

		mPixelArea = llmax(mPixelArea, face->getPixelArea());		

		if (face->mTextureMatrix != NULL)
		{
			if ((vsize < MIN_TEX_ANIM_SIZE && old_size > MIN_TEX_ANIM_SIZE) ||
				(vsize > MIN_TEX_ANIM_SIZE && old_size < MIN_TEX_ANIM_SIZE))
			{
				gPipeline.markRebuild(mDrawable, LLDrawable::REBUILD_TCOORD, FALSE);
			}
		}
				
		if (gPipeline.hasRenderDebugMask(LLPipeline::RENDER_DEBUG_TEXTURE_AREA))
		{
			if (vsize < min_vsize) min_vsize = vsize;
			if (vsize > max_vsize) max_vsize = vsize;
		}
		else if (gPipeline.hasRenderDebugMask(LLPipeline::RENDER_DEBUG_TEXTURE_PRIORITY))
		{
			LLViewerFetchedTexture* img = LLViewerTextureManager::staticCastToFetchedTexture(imagep) ;
			if(img)
			{
				F32 pri = img->getDecodePriority();
				pri = llmax(pri, 0.0f);
				if (pri < min_vsize) min_vsize = pri;
				if (pri > max_vsize) max_vsize = pri;
			}
		}
		else if (gPipeline.hasRenderDebugMask(LLPipeline::RENDER_DEBUG_FACE_AREA))
		{
			F32 pri = mPixelArea;
			if (pri < min_vsize) min_vsize = pri;
			if (pri > max_vsize) max_vsize = pri;
		}	
	}
	
	if (isSculpted())
	{
		LLSculptParams *sculpt_params = (LLSculptParams *)getParameterEntry(LLNetworkData::PARAMS_SCULPT);
		LLUUID id =  sculpt_params->getSculptTexture();
		
		updateSculptTexture();
		
		

		if (mSculptTexture.notNull())
		{
			mSculptTexture->setBoostLevel(llmax((S32)mSculptTexture->getBoostLevel(),
												(S32)LLViewerTexture::BOOST_SCULPTED));
			mSculptTexture->setForSculpt() ;
			
			if(!mSculptTexture->isCachedRawImageReady())
			{
				S32 lod = llmin(mLOD, 3);
				F32 lodf = ((F32)(lod + 1.0f)/4.f);
				F32 tex_size = lodf * LLViewerTexture::sMaxSculptRez ;
				mSculptTexture->addTextureStats(2.f * tex_size * tex_size, FALSE);
			
				//if the sculpty very close to the view point, load first
				{				
					LLVector3 lookAt = getPositionAgent() - camera->getOrigin();
					F32 dist = lookAt.normVec() ;
					F32 cos_angle_to_view_dir = lookAt * camera->getXAxis() ;				
					mSculptTexture->setAdditionalDecodePriority(0.8f * LLFace::calcImportanceToCamera(cos_angle_to_view_dir, dist)) ;
				}
			}
	
			S32 texture_discard = mSculptTexture->getDiscardLevel(); //try to match the texture
			S32 current_discard = getVolume() ? getVolume()->getSculptLevel() : -2 ;

			if (texture_discard >= 0 && //texture has some data available
				(texture_discard < current_discard || //texture has more data than last rebuild
				current_discard < 0)) //no previous rebuild
			{
				gPipeline.markRebuild(mDrawable, LLDrawable::REBUILD_VOLUME, FALSE);
				mSculptChanged = TRUE;
			}

			if (gPipeline.hasRenderDebugMask(LLPipeline::RENDER_DEBUG_SCULPTED))
			{
				setDebugText(llformat("T%d C%d V%d\n%dx%d",
										  texture_discard, current_discard, getVolume()->getSculptLevel(),
										  mSculptTexture->getHeight(), mSculptTexture->getWidth()));
			}
		}

	}

	if (getLightTextureID().notNull())
	{
		LLLightImageParams* params = (LLLightImageParams*) getParameterEntry(LLNetworkData::PARAMS_LIGHT_IMAGE);
		LLUUID id = params->getLightTexture();
		mLightTexture = LLViewerTextureManager::getFetchedTexture(id);
		if (mLightTexture.notNull())
		{
			F32 rad = getLightRadius();
			mLightTexture->addTextureStats(gPipeline.calcPixelArea(getPositionAgent(), 
																	LLVector3(rad,rad,rad),
																	*camera));
		}	
	}
	
	if (gPipeline.hasRenderDebugMask(LLPipeline::RENDER_DEBUG_TEXTURE_AREA))
	{
		setDebugText(llformat("%.0f:%.0f", (F32) sqrt(min_vsize),(F32) sqrt(max_vsize)));
	}
 	else if (gPipeline.hasRenderDebugMask(LLPipeline::RENDER_DEBUG_TEXTURE_PRIORITY))
 	{
 		setDebugText(llformat("%.0f:%.0f", (F32) sqrt(min_vsize),(F32) sqrt(max_vsize)));
 	}
	else if (gPipeline.hasRenderDebugMask(LLPipeline::RENDER_DEBUG_FACE_AREA))
	{
		setDebugText(llformat("%.0f:%.0f", (F32) sqrt(min_vsize),(F32) sqrt(max_vsize)));
	}

	if (mPixelArea == 0)
	{ //flexi phasing issues make this happen
		mPixelArea = old_area;
	}
}

BOOL LLVOVolume::isActive() const
{
	return !mStatic || mTextureAnimp || (mVolumeImpl && mVolumeImpl->isActive()) || 
		(mDrawable.notNull() && mDrawable->isActive());
}

BOOL LLVOVolume::setMaterial(const U8 material)
{
	BOOL res = LLViewerObject::setMaterial(material);
	
	return res;
}

void LLVOVolume::setTexture(const S32 face)
{
	llassert(face < getNumTEs());
	gGL.getTexUnit(0)->bind(getTEImage(face));
}

void LLVOVolume::setScale(const LLVector3 &scale, BOOL damped)
{
	if (scale != getScale())
	{
		// store local radius
		LLViewerObject::setScale(scale);

		if (mVolumeImpl)
		{
			mVolumeImpl->onSetScale(scale, damped);
		}
		
		updateRadius();

		//since drawable transforms do not include scale, changing volume scale
		//requires an immediate rebuild of volume verts.
		gPipeline.markRebuild(mDrawable, LLDrawable::REBUILD_POSITION, TRUE);
	}
}

LLFace* LLVOVolume::addFace(S32 f)
{
	const LLTextureEntry* te = getTE(f);
	LLViewerTexture* imagep = getTEImage(f);
	return mDrawable->addFace(te, imagep);
}

LLDrawable *LLVOVolume::createDrawable(LLPipeline *pipeline)
{
	pipeline->allocDrawable(this);
		
	mDrawable->setRenderType(LLPipeline::RENDER_TYPE_VOLUME);

	S32 max_tes_to_set = getNumTEs();
	for (S32 i = 0; i < max_tes_to_set; i++)
	{
		addFace(i);
	}
	mNumFaces = max_tes_to_set;

	if (isAttachment())
	{
		mDrawable->makeActive();
	}

	if (getIsLight())
	{
		// Add it to the pipeline mLightSet
		gPipeline.setLight(mDrawable, TRUE);
	}
	
	updateRadius();
	bool force_update = true; // avoid non-alpha mDistance update being optimized away
	mDrawable->updateDistance(*LLViewerCamera::getInstance(), force_update);

	return mDrawable;
}

BOOL LLVOVolume::setVolume(const LLVolumeParams &params_in, const S32 detail, bool unique_volume)
{
	LLVolumeParams volume_params = params_in;

	S32 last_lod = mVolumep.notNull() ? LLVolumeLODGroup::getVolumeDetailFromScale(mVolumep->getDetail()) : -1;
	S32 lod = mLOD;

	BOOL is404 = FALSE;
	
	if (isSculpted())
	{
		// if it's a mesh
		if ((volume_params.getSculptType() & LL_SCULPT_TYPE_MASK) == LL_SCULPT_TYPE_MESH)
		{ //meshes might not have all LODs, get the force detail to best existing LOD
			LLUUID mesh_id = volume_params.getSculptID();

			lod = gMeshRepo.getActualMeshLOD(volume_params, lod);
			if (lod == -1)
			{
				is404 = TRUE;
				lod = 0;
			}
		}
	}

	// Check if we need to change implementations
	bool is_flexible = (volume_params.getPathParams().getCurveType() == LL_PCODE_PATH_FLEXIBLE);
	if (is_flexible)
	{
		setParameterEntryInUse(LLNetworkData::PARAMS_FLEXIBLE, TRUE, false);
		if (!mVolumeImpl)
		{
			LLFlexibleObjectData* data = (LLFlexibleObjectData*)getParameterEntry(LLNetworkData::PARAMS_FLEXIBLE);
			mVolumeImpl = new LLVolumeImplFlexible(this, data);
		}
	}
	else
	{
		// Mark the parameter not in use
		setParameterEntryInUse(LLNetworkData::PARAMS_FLEXIBLE, FALSE, false);
		if (mVolumeImpl)
		{
			delete mVolumeImpl;
			mVolumeImpl = NULL;
			if (mDrawable.notNull())
			{
				// Undo the damage we did to this matrix
				mDrawable->updateXform(FALSE);
			}
		}
	}
	
	if (is404)
	{
		setIcon(LLViewerTextureManager::getFetchedTextureFromFile("icons/Inv_Mesh.png", TRUE, LLViewerTexture::BOOST_UI));
		//render prim proxy when mesh loading attempts give up
		volume_params.setSculptID(LLUUID::null, LL_SCULPT_TYPE_NONE);

	}

	if ((LLPrimitive::setVolume(volume_params, lod, (mVolumeImpl && mVolumeImpl->isVolumeUnique()))) || mSculptChanged)
	{
		mFaceMappingChanged = TRUE;
		
		if (mVolumeImpl)
		{
			mVolumeImpl->onSetVolume(volume_params, mLOD);
		}
	
		updateSculptTexture();

		if (isSculpted())
		{
			updateSculptTexture();
			// if it's a mesh
			if ((volume_params.getSculptType() & LL_SCULPT_TYPE_MASK) == LL_SCULPT_TYPE_MESH)
			{
				if (!getVolume()->isMeshAssetLoaded())
				{ 
					//load request not yet issued, request pipeline load this mesh
					LLUUID asset_id = volume_params.getSculptID();
					S32 available_lod = gMeshRepo.loadMesh(this, volume_params, lod, last_lod);
					if (available_lod != lod)
					{
						LLPrimitive::setVolume(volume_params, available_lod);
					}
				}
				
			}
			else // otherwise is sculptie
			{
				if (mSculptTexture.notNull())
				{
					sculpt();
				}
			}
		}

		return TRUE;
	}

	return FALSE;
}

void LLVOVolume::updateSculptTexture()
{
	LLPointer<LLViewerFetchedTexture> old_sculpt = mSculptTexture;

	if (isSculpted() && !isMesh())
	{
		LLSculptParams *sculpt_params = (LLSculptParams *)getParameterEntry(LLNetworkData::PARAMS_SCULPT);
		LLUUID id =  sculpt_params->getSculptTexture();
		if (id.notNull())
		{
			mSculptTexture = LLViewerTextureManager::getFetchedTexture(id, TRUE, LLViewerTexture::BOOST_NONE, LLViewerTexture::LOD_TEXTURE);
		}
	}
	else
	{
		mSculptTexture = NULL;
	}

	if (mSculptTexture != old_sculpt)
	{
		if (old_sculpt.notNull())
		{
			old_sculpt->removeVolume(this);
		}
		if (mSculptTexture.notNull())
		{
			mSculptTexture->addVolume(this);
		}
	}
	
}

void LLVOVolume::notifyMeshLoaded()
{ 
	mSculptChanged = TRUE;
	gPipeline.markRebuild(mDrawable, LLDrawable::REBUILD_GEOMETRY, TRUE);
}

// sculpt replaces generate() for sculpted surfaces
void LLVOVolume::sculpt()
{	
	if (mSculptTexture.notNull())
	{				
		U16 sculpt_height = 0;
		U16 sculpt_width = 0;
		S8 sculpt_components = 0;
		const U8* sculpt_data = NULL;
	
		S32 discard_level = mSculptTexture->getDiscardLevel() ;
		LLImageRaw* raw_image = mSculptTexture->getCachedRawImage() ;
		
		S32 max_discard = mSculptTexture->getMaxDiscardLevel();
		if (discard_level > max_discard)
			discard_level = max_discard;    // clamp to the best we can do

		S32 current_discard = getVolume()->getSculptLevel() ;
		if(current_discard < -2)
		{
			llwarns << "WARNING!!: Current discard of sculpty at " << current_discard 
				<< " is less than -2." << llendl;
			
			// corrupted volume... don't update the sculpty
			return;
		}
		else if (current_discard > MAX_DISCARD_LEVEL)
		{
			llwarns << "WARNING!!: Current discard of sculpty at " << current_discard 
				<< " is more than than allowed max of " << MAX_DISCARD_LEVEL << llendl;
			
			// corrupted volume... don't update the sculpty			
			return;
		}

		if (current_discard == discard_level)  // no work to do here
			return;
		
		if(!raw_image)
		{
			llassert(discard_level < 0) ;

			sculpt_width = 0;
			sculpt_height = 0;
			sculpt_data = NULL ;

			if(LLViewerTextureManager::sTesterp)
			{
				LLViewerTextureManager::sTesterp->updateGrayTextureBinding();
			}
		}
		else
		{					
			sculpt_height = raw_image->getHeight();
			sculpt_width = raw_image->getWidth();
			sculpt_components = raw_image->getComponents();		
					   
			sculpt_data = raw_image->getData();

			if(LLViewerTextureManager::sTesterp)
			{
				mSculptTexture->updateBindStatsForTester() ;
			}
		}
		getVolume()->sculpt(sculpt_width, sculpt_height, sculpt_components, sculpt_data, discard_level);

		//notify rebuild any other VOVolumes that reference this sculpty volume
		for (S32 i = 0; i < mSculptTexture->getNumVolumes(); ++i)
		{
			LLVOVolume* volume = (*(mSculptTexture->getVolumeList()))[i];
			if (volume != this && volume->getVolume() == getVolume())
			{
				gPipeline.markRebuild(volume->mDrawable, LLDrawable::REBUILD_GEOMETRY, FALSE);
			}
		}
	}
}

S32	LLVOVolume::computeLODDetail(F32 distance, F32 radius)
{
	S32	cur_detail;
	if (LLPipeline::sDynamicLOD)
	{
		// We've got LOD in the profile, and in the twist.  Use radius.
		F32 tan_angle = (LLVOVolume::sLODFactor*radius)/distance;
		cur_detail = LLVolumeLODGroup::getDetailFromTan(llround(tan_angle, 0.01f));
	}
	else
	{
		cur_detail = llclamp((S32) (sqrtf(radius)*LLVOVolume::sLODFactor*4.f), 0, 3);		
	}
	return cur_detail;
}

BOOL LLVOVolume::calcLOD()
{
	if (mDrawable.isNull())
	{
		return FALSE;
	}

	S32 cur_detail = 0;
	
	F32 radius;
	F32 distance;

	if (mDrawable->isState(LLDrawable::RIGGED))
	{
		LLVOAvatar* avatar = getAvatar(); 
		distance = avatar->mDrawable->mDistanceWRTCamera;
		radius = avatar->getBinRadius();
	}
	else
	{
		distance = mDrawable->mDistanceWRTCamera;
		radius = getVolume()->mLODScaleBias.scaledVec(getScale()).length();
	}
	
	//hold onto unmodified distance for debugging
	//F32 debug_distance = distance;
	
	distance *= sDistanceFactor;

	F32 rampDist = LLVOVolume::sLODFactor * 2;
	
	if (distance < rampDist)
	{
		// Boost LOD when you're REALLY close
		distance *= 1.0f/rampDist;
		distance *= distance;
		distance *= rampDist;
	}
	
	// DON'T Compensate for field of view changing on FOV zoom.
	distance *= F_PI/3.f;

	cur_detail = computeLODDetail(llround(distance, 0.01f), 
									llround(radius, 0.01f));


	if (gPipeline.hasRenderDebugMask(LLPipeline::RENDER_DEBUG_LOD_INFO))
	{
		//setDebugText(llformat("%.2f:%.2f, %d", debug_distance, radius, cur_detail));

		setDebugText(llformat("%d", mDrawable->getFace(0)->getTextureIndex()));
	}

	if (cur_detail != mLOD)
	{
		mAppAngle = llround((F32) atan2( mDrawable->getRadius(), mDrawable->mDistanceWRTCamera) * RAD_TO_DEG, 0.01f);
		mLOD = cur_detail;		
		return TRUE;
	}
	else
	{
		return FALSE;
	}
}

BOOL LLVOVolume::updateLOD()
{
	if (mDrawable.isNull())
	{
		return FALSE;
	}
	
	BOOL lod_changed = calcLOD();

	if (lod_changed)
	{
		gPipeline.markRebuild(mDrawable, LLDrawable::REBUILD_VOLUME, FALSE);
		mLODChanged = TRUE;
	}
	else
	{
		F32 new_radius = getBinRadius();
		F32 old_radius = mDrawable->getBinRadius();
		if (new_radius < old_radius * 0.9f || new_radius > old_radius*1.1f)
		{
			gPipeline.markPartitionMove(mDrawable);
		}
	}

	lod_changed = lod_changed || LLViewerObject::updateLOD();
	
	return lod_changed;
}

BOOL LLVOVolume::setDrawableParent(LLDrawable* parentp)
{
	if (!LLViewerObject::setDrawableParent(parentp))
	{
		// no change in drawable parent
		return FALSE;
	}

	if (!mDrawable->isRoot())
	{
		// rebuild vertices in parent relative space
		gPipeline.markRebuild(mDrawable, LLDrawable::REBUILD_VOLUME, TRUE);

		if (mDrawable->isActive() && !parentp->isActive())
		{
			parentp->makeActive();
		}
		else if (mDrawable->isStatic() && parentp->isActive())
		{
			mDrawable->makeActive();
		}
	}
	
	return TRUE;
}

void LLVOVolume::updateFaceFlags()
{
	for (S32 i = 0; i < getVolume()->getNumFaces(); i++)
	{
		LLFace *face = mDrawable->getFace(i);
		if (!face)
		{
			return;
		}

		BOOL fullbright = getTE(i)->getFullbright();
		face->clearState(LLFace::FULLBRIGHT | LLFace::HUD_RENDER | LLFace::LIGHT);

		if (fullbright || (mMaterial == LL_MCODE_LIGHT))
		{
			face->setState(LLFace::FULLBRIGHT);
		}
		if (mDrawable->isLight())
		{
			face->setState(LLFace::LIGHT);
		}
		if (isHUDAttachment())
		{
			face->setState(LLFace::HUD_RENDER);
		}
	}
}

BOOL LLVOVolume::setParent(LLViewerObject* parent)
{
	BOOL ret = FALSE ;
	if (parent != getParent())
	{
		ret = LLViewerObject::setParent(parent);
		if (ret && mDrawable)
		{
			gPipeline.markMoved(mDrawable);
			gPipeline.markRebuild(mDrawable, LLDrawable::REBUILD_VOLUME, TRUE);
		}
	}

	return ret ;
}

// NOTE: regenFaces() MUST be followed by genTriangles()!
void LLVOVolume::regenFaces()
{
	// remove existing faces
	BOOL count_changed = mNumFaces != getNumTEs();
	
	if (count_changed)
	{
		deleteFaces();		
		// add new faces
		mNumFaces = getNumTEs();
	}
		
	for (S32 i = 0; i < mNumFaces; i++)
	{
		LLFace* facep = count_changed ? addFace(i) : mDrawable->getFace(i);
		facep->setTEOffset(i);
		facep->setTexture(getTEImage(i));
		facep->setViewerObject(this);
		
		// If the face had media on it, this will have broken the link between the LLViewerMediaTexture and the face.
		// Re-establish the link.
		if((int)mMediaImplList.size() > i)
		{
			if(mMediaImplList[i])
			{
				LLViewerMediaTexture* media_tex = LLViewerTextureManager::findMediaTexture(mMediaImplList[i]->getMediaTextureID()) ;
				if(media_tex)
				{
					media_tex->addMediaToFace(facep) ;
				}
			}
		}
	}
	
	if (!count_changed)
	{
		updateFaceFlags();
	}
}

BOOL LLVOVolume::genBBoxes(BOOL force_global)
{
	BOOL res = TRUE;

	LLVector4a min,max;

	min.clear();
	max.clear();

	BOOL rebuild = mDrawable->isState(LLDrawable::REBUILD_VOLUME | LLDrawable::REBUILD_POSITION | LLDrawable::REBUILD_RIGGED);

//	bool rigged = false;
	LLVolume* volume = mRiggedVolume;
	if (!volume)
	{
		volume = getVolume();
	}

	for (S32 i = 0; i < getVolume()->getNumVolumeFaces(); i++)
	{
		LLFace *face = mDrawable->getFace(i);
		if (!face)
		{
			continue;
		}
		res &= face->genVolumeBBoxes(*volume, i,
										mRelativeXform, mRelativeXformInvTrans,
										(mVolumeImpl && mVolumeImpl->isVolumeGlobal()) || force_global);
		
		if (rebuild)
		{
			if (i == 0)
			{
				min = face->mExtents[0];
				max = face->mExtents[1];
			}
			else
			{
				min.setMin(min, face->mExtents[0]);
				max.setMax(max, face->mExtents[1]);
			}
		}
	}
	
	if (rebuild)
	{
		mDrawable->setSpatialExtents(min,max);
		min.add(max);
		min.mul(0.5f);
		mDrawable->setPositionGroup(min);	
	}

	updateRadius();
	mDrawable->movePartition();
			
	return res;
}

void LLVOVolume::preRebuild()
{
	if (mVolumeImpl != NULL)
	{
		mVolumeImpl->preRebuild();
	}
}

void LLVOVolume::updateRelativeXform()
{
	if (mVolumeImpl)
	{
		mVolumeImpl->updateRelativeXform();
		return;
	}
	
	LLDrawable* drawable = mDrawable;
	
	if (drawable->isState(LLDrawable::RIGGED) && mRiggedVolume.notNull())
	{ //rigged volume (which is in agent space) is used for generating bounding boxes etc
	  //inverse of render matrix should go to partition space
		mRelativeXform = getRenderMatrix();

		F32* dst = (F32*) mRelativeXformInvTrans.mMatrix;
		F32* src = (F32*) mRelativeXform.mMatrix;
		dst[0] = src[0]; dst[1] = src[1]; dst[2] = src[2];
		dst[3] = src[4]; dst[4] = src[5]; dst[5] = src[6];
		dst[6] = src[8]; dst[7] = src[9]; dst[8] = src[10];
		
		mRelativeXform.invert();
		mRelativeXformInvTrans.transpose();
	}
	else if (drawable->isActive())
	{				
		// setup relative transforms
		LLQuaternion delta_rot;
		LLVector3 delta_pos, delta_scale;
		
		//matrix from local space to parent relative/global space
		delta_rot = drawable->isSpatialRoot() ? LLQuaternion() : mDrawable->getRotation();
		delta_pos = drawable->isSpatialRoot() ? LLVector3(0,0,0) : mDrawable->getPosition();
		delta_scale = mDrawable->getScale();

		// Vertex transform (4x4)
		LLVector3 x_axis = LLVector3(delta_scale.mV[VX], 0.f, 0.f) * delta_rot;
		LLVector3 y_axis = LLVector3(0.f, delta_scale.mV[VY], 0.f) * delta_rot;
		LLVector3 z_axis = LLVector3(0.f, 0.f, delta_scale.mV[VZ]) * delta_rot;

		mRelativeXform.initRows(LLVector4(x_axis, 0.f),
								LLVector4(y_axis, 0.f),
								LLVector4(z_axis, 0.f),
								LLVector4(delta_pos, 1.f));

		
		// compute inverse transpose for normals
		// mRelativeXformInvTrans.setRows(x_axis, y_axis, z_axis);
		// mRelativeXformInvTrans.invert(); 
		// mRelativeXformInvTrans.setRows(x_axis, y_axis, z_axis);
		// grumble - invert is NOT a matrix invert, so we do it by hand:

		LLMatrix3 rot_inverse = LLMatrix3(~delta_rot);

		LLMatrix3 scale_inverse;
		scale_inverse.setRows(LLVector3(1.0, 0.0, 0.0) / delta_scale.mV[VX],
							  LLVector3(0.0, 1.0, 0.0) / delta_scale.mV[VY],
							  LLVector3(0.0, 0.0, 1.0) / delta_scale.mV[VZ]);
							   
		
		mRelativeXformInvTrans = rot_inverse * scale_inverse;

		mRelativeXformInvTrans.transpose();
	}
	else
	{
		LLVector3 pos = getPosition();
		LLVector3 scale = getScale();
		LLQuaternion rot = getRotation();
	
		if (mParent)
		{
			pos *= mParent->getRotation();
			pos += mParent->getPosition();
			rot *= mParent->getRotation();
		}
		
		//LLViewerRegion* region = getRegion();
		//pos += region->getOriginAgent();
		
		LLVector3 x_axis = LLVector3(scale.mV[VX], 0.f, 0.f) * rot;
		LLVector3 y_axis = LLVector3(0.f, scale.mV[VY], 0.f) * rot;
		LLVector3 z_axis = LLVector3(0.f, 0.f, scale.mV[VZ]) * rot;

		mRelativeXform.initRows(LLVector4(x_axis, 0.f),
								LLVector4(y_axis, 0.f),
								LLVector4(z_axis, 0.f),
								LLVector4(pos, 1.f));

		// compute inverse transpose for normals
		LLMatrix3 rot_inverse = LLMatrix3(~rot);

		LLMatrix3 scale_inverse;
		scale_inverse.setRows(LLVector3(1.0, 0.0, 0.0) / scale.mV[VX],
							  LLVector3(0.0, 1.0, 0.0) / scale.mV[VY],
							  LLVector3(0.0, 0.0, 1.0) / scale.mV[VZ]);
							   
		
		mRelativeXformInvTrans = rot_inverse * scale_inverse;

		mRelativeXformInvTrans.transpose();
	}
}

static LLFastTimer::DeclareTimer FTM_GEN_FLEX("Generate Flexies");
static LLFastTimer::DeclareTimer FTM_UPDATE_PRIMITIVES("Update Primitives");
static LLFastTimer::DeclareTimer FTM_UPDATE_RIGGED_VOLUME("Update Rigged");

BOOL LLVOVolume::updateGeometry(LLDrawable *drawable)
{
	LLFastTimer t(FTM_UPDATE_PRIMITIVES);
	
	if (mDrawable->isState(LLDrawable::REBUILD_RIGGED))
	{
		{
			LLFastTimer t(FTM_UPDATE_RIGGED_VOLUME);
			updateRiggedVolume();
		}
		genBBoxes(FALSE);
		mDrawable->clearState(LLDrawable::REBUILD_RIGGED);
	}

	if (mVolumeImpl != NULL)
	{
		BOOL res;
		{
			LLFastTimer t(FTM_GEN_FLEX);
			res = mVolumeImpl->doUpdateGeometry(drawable);
		}
		updateFaceFlags();
		return res;
	}
	
	dirtySpatialGroup(drawable->isState(LLDrawable::IN_REBUILD_Q1));

	BOOL compiled = FALSE;
			
	updateRelativeXform();
	
	if (mDrawable.isNull()) // Not sure why this is happening, but it is...
	{
		return TRUE; // No update to complete
	}

	if (mVolumeChanged || mFaceMappingChanged )
	{
		compiled = TRUE;

		if (mVolumeChanged)
		{
			LLFastTimer ftm(FTM_GEN_VOLUME);
			LLVolumeParams volume_params = getVolume()->getParams();
			setVolume(volume_params, 0);
			drawable->setState(LLDrawable::REBUILD_VOLUME);
		}

		{
			LLFastTimer t(FTM_GEN_TRIANGLES);
			regenFaces();
			genBBoxes(FALSE);
		}
	}
	else if ((mLODChanged) || (mSculptChanged))
	{
		LLVolume *old_volumep, *new_volumep;
		F32 old_lod, new_lod;
		S32 old_num_faces, new_num_faces ;

		old_volumep = getVolume();
		old_lod = old_volumep->getDetail();
		old_num_faces = old_volumep->getNumFaces() ;
		old_volumep = NULL ;

		{
			LLFastTimer ftm(FTM_GEN_VOLUME);
			LLVolumeParams volume_params = getVolume()->getParams();
			setVolume(volume_params, 0);
		}

		new_volumep = getVolume();
		new_lod = new_volumep->getDetail();
		new_num_faces = new_volumep->getNumFaces() ;
		new_volumep = NULL ;

		if ((new_lod != old_lod) || mSculptChanged)
		{
			compiled = TRUE;
			sNumLODChanges += new_num_faces ;
	
			if((S32)getNumTEs() != getVolume()->getNumFaces())
			{
				setNumTEs(getVolume()->getNumFaces()); //mesh loading may change number of faces.
			}

			drawable->setState(LLDrawable::REBUILD_VOLUME); // for face->genVolumeTriangles()

			{
				LLFastTimer t(FTM_GEN_TRIANGLES);
				if (new_num_faces != old_num_faces || mNumFaces != (S32)getNumTEs())
				{
					regenFaces();
				}
				genBBoxes(FALSE);

				if (mSculptChanged)
				{ //changes in sculpt maps can thrash an object bounding box without 
				  //triggering a spatial group bounding box update -- force spatial group
				  //to update bounding boxes
					LLSpatialGroup* group = mDrawable->getSpatialGroup();
					if (group)
					{
						group->unbound();
					}
				}
			}
		}
	}
	// it has its own drawable (it's moved) or it has changed UVs or it has changed xforms from global<->local
	else
	{
		compiled = TRUE;
		// All it did was move or we changed the texture coordinate offset
		LLFastTimer t(FTM_GEN_TRIANGLES);
		genBBoxes(FALSE);
	}

	// Update face flags
	updateFaceFlags();
	
	if(compiled)
	{
		LLPipeline::sCompiles++;
	}
		
	mVolumeChanged = FALSE;
	mLODChanged = FALSE;
	mSculptChanged = FALSE;
	mFaceMappingChanged = FALSE;
	
	return LLViewerObject::updateGeometry(drawable);
}

void LLVOVolume::updateFaceSize(S32 idx)
{
	LLFace* facep = mDrawable->getFace(idx);
	if (idx >= getVolume()->getNumVolumeFaces())
	{
		facep->setSize(0,0, true);
	}
	else
	{
		const LLVolumeFace& vol_face = getVolume()->getVolumeFace(idx);
		facep->setSize(vol_face.mNumVertices, vol_face.mNumIndices, 
						true); // <--- volume faces should be padded for 16-byte alignment
		
	}
}

BOOL LLVOVolume::isRootEdit() const
{
	if (mParent && !((LLViewerObject*)mParent)->isAvatar())
	{
		return FALSE;
	}
	return TRUE;
}

//virtual
void LLVOVolume::setNumTEs(const U8 num_tes)
{
	const U8 old_num_tes = getNumTEs() ;
	
	if(old_num_tes && old_num_tes < num_tes) //new faces added
	{
		LLViewerObject::setNumTEs(num_tes) ;

		if(mMediaImplList.size() >= old_num_tes && mMediaImplList[old_num_tes -1].notNull())//duplicate the last media textures if exists.
		{
			mMediaImplList.resize(num_tes) ;
			const LLTextureEntry* te = getTE(old_num_tes - 1) ;
			for(U8 i = old_num_tes; i < num_tes ; i++)
			{
				setTE(i, *te) ;
				mMediaImplList[i] = mMediaImplList[old_num_tes -1] ;
			}
			mMediaImplList[old_num_tes -1]->setUpdated(TRUE) ;
		}
	}
	else if(old_num_tes > num_tes && mMediaImplList.size() > num_tes) //old faces removed
	{
		U8 end = mMediaImplList.size() ;
		for(U8 i = num_tes; i < end ; i++)
		{
			removeMediaImpl(i) ;				
		}
		mMediaImplList.resize(num_tes) ;

		LLViewerObject::setNumTEs(num_tes) ;
	}
	else
	{
		LLViewerObject::setNumTEs(num_tes) ;
	}

	return ;
}

void LLVOVolume::setTEImage(const U8 te, LLViewerTexture *imagep)
{
	BOOL changed = (mTEImages[te] != imagep);
	LLViewerObject::setTEImage(te, imagep);
	if (changed)
	{
		gPipeline.markTextured(mDrawable);
		mFaceMappingChanged = TRUE;
	}
}

S32 LLVOVolume::setTETexture(const U8 te, const LLUUID &uuid)
{
	S32 res = LLViewerObject::setTETexture(te, uuid);
	if (res)
	{
		gPipeline.markTextured(mDrawable);
		mFaceMappingChanged = TRUE;
	}
	return res;
}

S32 LLVOVolume::setTEColor(const U8 te, const LLColor3& color)
{
	return setTEColor(te, LLColor4(color));
}

S32 LLVOVolume::setTEColor(const U8 te, const LLColor4& color)
{
	S32 retval = 0;
	const LLTextureEntry *tep = getTE(te);
	if (!tep)
	{
		llwarns << "No texture entry for te " << (S32)te << ", object " << mID << llendl;
	}
	else if (color != tep->getColor())
	{
		if (color.mV[3] != tep->getColor().mV[3])
		{
			gPipeline.markTextured(mDrawable);
		}
		retval = LLPrimitive::setTEColor(te, color);
		if (mDrawable.notNull() && retval)
		{
			// These should only happen on updates which are not the initial update.
			mDrawable->setState(LLDrawable::REBUILD_COLOR);
			dirtyMesh();
		}
	}

	return  retval;
}

S32 LLVOVolume::setTEBumpmap(const U8 te, const U8 bumpmap)
{
	S32 res = LLViewerObject::setTEBumpmap(te, bumpmap);
	if (res)
	{
		gPipeline.markTextured(mDrawable);
		mFaceMappingChanged = TRUE;
	}
	return  res;
}

S32 LLVOVolume::setTETexGen(const U8 te, const U8 texgen)
{
	S32 res = LLViewerObject::setTETexGen(te, texgen);
	if (res)
	{
		gPipeline.markTextured(mDrawable);
		mFaceMappingChanged = TRUE;
	}
	return  res;
}

S32 LLVOVolume::setTEMediaTexGen(const U8 te, const U8 media)
{
	S32 res = LLViewerObject::setTEMediaTexGen(te, media);
	if (res)
	{
		gPipeline.markTextured(mDrawable);
		mFaceMappingChanged = TRUE;
	}
	return  res;
}

S32 LLVOVolume::setTEShiny(const U8 te, const U8 shiny)
{
	S32 res = LLViewerObject::setTEShiny(te, shiny);
	if (res)
	{
		gPipeline.markTextured(mDrawable);
		mFaceMappingChanged = TRUE;
	}
	return  res;
}

S32 LLVOVolume::setTEFullbright(const U8 te, const U8 fullbright)
{
	S32 res = LLViewerObject::setTEFullbright(te, fullbright);
	if (res)
	{
		gPipeline.markTextured(mDrawable);
		mFaceMappingChanged = TRUE;
	}
	return  res;
}

S32 LLVOVolume::setTEBumpShinyFullbright(const U8 te, const U8 bump)
{
	S32 res = LLViewerObject::setTEBumpShinyFullbright(te, bump);
	if (res)
	{
		gPipeline.markTextured(mDrawable);
		mFaceMappingChanged = TRUE;
	}
	return res;
}

S32 LLVOVolume::setTEMediaFlags(const U8 te, const U8 media_flags)
{
	S32 res = LLViewerObject::setTEMediaFlags(te, media_flags);
	if (res)
	{
		gPipeline.markTextured(mDrawable);
		mFaceMappingChanged = TRUE;
	}
	return  res;
}

S32 LLVOVolume::setTEGlow(const U8 te, const F32 glow)
{
	S32 res = LLViewerObject::setTEGlow(te, glow);
	if (res)
	{
		gPipeline.markTextured(mDrawable);
		mFaceMappingChanged = TRUE;
	}
	return  res;
}

S32 LLVOVolume::setTEScale(const U8 te, const F32 s, const F32 t)
{
	S32 res = LLViewerObject::setTEScale(te, s, t);
	if (res)
	{
		gPipeline.markTextured(mDrawable);
		mFaceMappingChanged = TRUE;
	}
	return res;
}

S32 LLVOVolume::setTEScaleS(const U8 te, const F32 s)
{
	S32 res = LLViewerObject::setTEScaleS(te, s);
	if (res)
	{
		gPipeline.markTextured(mDrawable);
		mFaceMappingChanged = TRUE;
	}
	return res;
}

S32 LLVOVolume::setTEScaleT(const U8 te, const F32 t)
{
	S32 res = LLViewerObject::setTEScaleT(te, t);
	if (res)
	{
		gPipeline.markTextured(mDrawable);
		mFaceMappingChanged = TRUE;
	}
	return res;
}

void LLVOVolume::updateTEData()
{
	/*if (mDrawable.notNull())
	{
		mFaceMappingChanged = TRUE;
		gPipeline.markRebuild(mDrawable, LLDrawable::REBUILD_MATERIAL, TRUE);
	}*/
}

bool LLVOVolume::hasMedia() const
{
	bool result = false;
	const U8 numTEs = getNumTEs();
	for (U8 i = 0; i < numTEs; i++)
	{
		const LLTextureEntry* te = getTE(i);
		if(te->hasMedia())
		{
			result = true;
			break;
		}
	}
	return result;
}

LLVector3 LLVOVolume::getApproximateFaceNormal(U8 face_id)
{
	LLVolume* volume = getVolume();
	LLVector4a result;
	result.clear();

	LLVector3 ret;

	if (volume && face_id < volume->getNumVolumeFaces())
	{
		const LLVolumeFace& face = volume->getVolumeFace(face_id);
		for (S32 i = 0; i < (S32)face.mNumVertices; ++i)
		{
			result.add(face.mNormals[i]);
		}

		LLVector3 ret(result.getF32ptr());
		ret = volumeDirectionToAgent(ret);
		ret.normVec();
	}
	
	return ret;
}

void LLVOVolume::requestMediaDataUpdate(bool isNew)
{
    if (sObjectMediaClient)
		sObjectMediaClient->fetchMedia(new LLMediaDataClientObjectImpl(this, isNew));
}

bool LLVOVolume::isMediaDataBeingFetched() const
{
	// I know what I'm doing by const_casting this away: this is just 
	// a wrapper class that is only going to do a lookup.
	return (sObjectMediaClient) ? sObjectMediaClient->isInQueue(new LLMediaDataClientObjectImpl(const_cast<LLVOVolume*>(this), false)) : false;
}

void LLVOVolume::cleanUpMediaImpls()
{
	// Iterate through our TEs and remove any Impls that are no longer used
	const U8 numTEs = getNumTEs();
	for (U8 i = 0; i < numTEs; i++)
	{
		const LLTextureEntry* te = getTE(i);
		if( ! te->hasMedia())
		{
			// Delete the media IMPL!
			removeMediaImpl(i) ;
		}
	}
}

void LLVOVolume::updateObjectMediaData(const LLSD &media_data_array, const std::string &media_version)
{
	// media_data_array is an array of media entry maps
	// media_version is the version string in the response.
	U32 fetched_version = LLTextureEntry::getVersionFromMediaVersionString(media_version);

	// Only update it if it is newer!
	if ( (S32)fetched_version > mLastFetchedMediaVersion)
	{
		mLastFetchedMediaVersion = fetched_version;
		//llinfos << "updating:" << this->getID() << " " << ll_pretty_print_sd(media_data_array) << llendl;
		
		LLSD::array_const_iterator iter = media_data_array.beginArray();
		LLSD::array_const_iterator end = media_data_array.endArray();
		U8 texture_index = 0;
		for (; iter != end; ++iter, ++texture_index)
		{
			syncMediaData(texture_index, *iter, false/*merge*/, false/*ignore_agent*/);
		}
	}
}

void LLVOVolume::syncMediaData(S32 texture_index, const LLSD &media_data, bool merge, bool ignore_agent)
{
	if(mDead)
	{
		// If the object has been marked dead, don't process media updates.
		return;
	}
	
	LLTextureEntry *te = getTE(texture_index);
	if(!te)
	{
		return ;
	}

	LL_DEBUGS("MediaOnAPrim") << "BEFORE: texture_index = " << texture_index
		<< " hasMedia = " << te->hasMedia() << " : " 
		<< ((NULL == te->getMediaData()) ? "NULL MEDIA DATA" : ll_pretty_print_sd(te->getMediaData()->asLLSD())) << llendl;

	std::string previous_url;
	LLMediaEntry* mep = te->getMediaData();
	if(mep)
	{
		// Save the "current url" from before the update so we can tell if
		// it changes. 
		previous_url = mep->getCurrentURL();
	}

	if (merge)
	{
		te->mergeIntoMediaData(media_data);
	}
	else {
		// XXX Question: what if the media data is undefined LLSD, but the
		// update we got above said that we have media flags??	Here we clobber
		// that, assuming the data from the service is more up-to-date. 
		te->updateMediaData(media_data);
	}

	mep = te->getMediaData();
	if(mep)
	{
		bool update_from_self = false;
		if (!ignore_agent) 
		{
			LLUUID updating_agent = LLTextureEntry::getAgentIDFromMediaVersionString(getMediaURL());
			update_from_self = (updating_agent == gAgent.getID());
		}
		viewer_media_t media_impl = LLViewerMedia::updateMediaImpl(mep, previous_url, update_from_self);
			
		addMediaImpl(media_impl, texture_index) ;
	}
	else
	{
		removeMediaImpl(texture_index);
	}

	LL_DEBUGS("MediaOnAPrim") << "AFTER: texture_index = " << texture_index
		<< " hasMedia = " << te->hasMedia() << " : " 
		<< ((NULL == te->getMediaData()) ? "NULL MEDIA DATA" : ll_pretty_print_sd(te->getMediaData()->asLLSD())) << llendl;
}

void LLVOVolume::mediaNavigateBounceBack(U8 texture_index)
{
	// Find the media entry for this navigate
	const LLMediaEntry* mep = NULL;
	viewer_media_t impl = getMediaImpl(texture_index);
	LLTextureEntry *te = getTE(texture_index);
	if(te)
	{
		mep = te->getMediaData();
	}
	
	if (mep && impl)
	{
        std::string url = mep->getCurrentURL();
		// Look for a ":", if not there, assume "http://"
		if (!url.empty() && std::string::npos == url.find(':')) 
		{
			url = "http://" + url;
		}
		// If the url we're trying to "bounce back" to is either empty or not
		// allowed by the whitelist, try the home url.  If *that* doesn't work,
		// set the media as failed and unload it
        if (url.empty() || !mep->checkCandidateUrl(url))
        {
            url = mep->getHomeURL();
			// Look for a ":", if not there, assume "http://"
			if (!url.empty() && std::string::npos == url.find(':')) 
			{
				url = "http://" + url;
			}
        }
        if (url.empty() || !mep->checkCandidateUrl(url))
		{
			// The url to navigate back to is not good, and we have nowhere else
			// to go.
			LL_WARNS("MediaOnAPrim") << "FAILED to bounce back URL \"" << url << "\" -- unloading impl" << LL_ENDL;
			impl->setMediaFailed(true);
		}
		else {
			// Okay, navigate now
            LL_INFOS("MediaOnAPrim") << "bouncing back to URL: " << url << LL_ENDL;
            impl->navigateTo(url, "", false, true);
        }
    }
}

bool LLVOVolume::hasMediaPermission(const LLMediaEntry* media_entry, MediaPermType perm_type)
{
    // NOTE: This logic ALMOST duplicates the logic in the server (in particular, in llmediaservice.cpp).
    if (NULL == media_entry ) return false; // XXX should we assert here?
    
    // The agent has permissions if:
    // - world permissions are on, or
    // - group permissions are on, and agent_id is in the group, or
    // - agent permissions are on, and agent_id is the owner
    
	// *NOTE: We *used* to check for modify permissions here (i.e. permissions were
	// granted if permModify() was true).  However, this doesn't make sense in the
	// viewer: we don't want to show controls or allow interaction if the author
	// has deemed it so.  See DEV-42115.
	
    U8 media_perms = (perm_type == MEDIA_PERM_INTERACT) ? media_entry->getPermsInteract() : media_entry->getPermsControl();
    
    // World permissions
    if (0 != (media_perms & LLMediaEntry::PERM_ANYONE)) 
    {
        return true;
    }
    
    // Group permissions
    else if (0 != (media_perms & LLMediaEntry::PERM_GROUP))
    {
		LLPermissions* obj_perm = LLSelectMgr::getInstance()->findObjectPermissions(this);
		if (obj_perm && gAgent.isInGroup(obj_perm->getGroup()))
		{
			return true;
		}
    }
    
    // Owner permissions
    else if (0 != (media_perms & LLMediaEntry::PERM_OWNER) && permYouOwner()) 
    {
        return true;
    }
    
    return false;
    
}

void LLVOVolume::mediaNavigated(LLViewerMediaImpl *impl, LLPluginClassMedia* plugin, std::string new_location)
{
	bool block_navigation = false;
	// FIXME: if/when we allow the same media impl to be used by multiple faces, the logic here will need to be fixed
	// to deal with multiple face indices.
	int face_index = getFaceIndexWithMediaImpl(impl, -1);
	
	// Find the media entry for this navigate
	LLMediaEntry* mep = NULL;
	LLTextureEntry *te = getTE(face_index);
	if(te)
	{
		mep = te->getMediaData();
	}
	
	if(mep)
	{
		if(!mep->checkCandidateUrl(new_location))
		{
			block_navigation = true;
		}
		if (!block_navigation && !hasMediaPermission(mep, MEDIA_PERM_INTERACT))
		{
			block_navigation = true;
		}
	}
	else
	{
		LL_WARNS("MediaOnAPrim") << "Couldn't find media entry!" << LL_ENDL;
	}
						
	if(block_navigation)
	{
		LL_INFOS("MediaOnAPrim") << "blocking navigate to URI " << new_location << LL_ENDL;

		// "bounce back" to the current URL from the media entry
		mediaNavigateBounceBack(face_index);
	}
	else if (sObjectMediaNavigateClient)
	{
		
		LL_DEBUGS("MediaOnAPrim") << "broadcasting navigate with URI " << new_location << LL_ENDL;

		sObjectMediaNavigateClient->navigate(new LLMediaDataClientObjectImpl(this, false), face_index, new_location);
	}
}

void LLVOVolume::mediaEvent(LLViewerMediaImpl *impl, LLPluginClassMedia* plugin, LLViewerMediaObserver::EMediaEvent event)
{
	switch(event)
	{
		
		case LLViewerMediaObserver::MEDIA_EVENT_LOCATION_CHANGED:
		{			
			switch(impl->getNavState())
			{
				case LLViewerMediaImpl::MEDIANAVSTATE_FIRST_LOCATION_CHANGED:
				{
					// This is the first location changed event after the start of a non-server-directed nav.  It may need to be broadcast or bounced back.
					mediaNavigated(impl, plugin, plugin->getLocation());
				}
				break;
				
				case LLViewerMediaImpl::MEDIANAVSTATE_FIRST_LOCATION_CHANGED_SPURIOUS:
					// This navigate didn't change the current URL.  
					LL_DEBUGS("MediaOnAPrim") << "	NOT broadcasting navigate (spurious)" << LL_ENDL;
				break;
				
				case LLViewerMediaImpl::MEDIANAVSTATE_SERVER_FIRST_LOCATION_CHANGED:
					// This is the first location changed event after the start of a server-directed nav.  Don't broadcast it.
					LL_INFOS("MediaOnAPrim") << "	NOT broadcasting navigate (server-directed)" << LL_ENDL;
				break;
				
				default:
					// This is a subsequent location-changed due to a redirect.	 Don't broadcast.
					LL_INFOS("MediaOnAPrim") << "	NOT broadcasting navigate (redirect)" << LL_ENDL;
				break;
			}
		}
		break;
		
		case LLViewerMediaObserver::MEDIA_EVENT_NAVIGATE_COMPLETE:
		{
			switch(impl->getNavState())
			{
				case LLViewerMediaImpl::MEDIANAVSTATE_COMPLETE_BEFORE_LOCATION_CHANGED:
				{
					// This is the first location changed event after the start of a non-server-directed nav.  It may need to be broadcast or bounced back.
					mediaNavigated(impl, plugin, plugin->getNavigateURI());
				}
				break;
				
				case LLViewerMediaImpl::MEDIANAVSTATE_COMPLETE_BEFORE_LOCATION_CHANGED_SPURIOUS:
					// This navigate didn't change the current URL.  
					LL_DEBUGS("MediaOnAPrim") << "	NOT broadcasting navigate (spurious)" << LL_ENDL;
				break;

				case LLViewerMediaImpl::MEDIANAVSTATE_SERVER_COMPLETE_BEFORE_LOCATION_CHANGED:
					// This is the the navigate complete event from a server-directed nav.  Don't broadcast it.
					LL_INFOS("MediaOnAPrim") << "	NOT broadcasting navigate (server-directed)" << LL_ENDL;
				break;
				
				default:
					// For all other states, the navigate should have been handled by LOCATION_CHANGED events already.
				break;
			}
		}
		break;
		
		default:
		break;
	}

}

void LLVOVolume::sendMediaDataUpdate()
{
    if (sObjectMediaClient)
		sObjectMediaClient->updateMedia(new LLMediaDataClientObjectImpl(this, false));
}

void LLVOVolume::removeMediaImpl(S32 texture_index)
{
	if(mMediaImplList.size() <= (U32)texture_index || mMediaImplList[texture_index].isNull())
	{
		return ;
	}

	//make the face referencing to mMediaImplList[texture_index] to point back to the old texture.
	if(mDrawable && texture_index < mDrawable->getNumFaces())
	{
		LLFace* facep = mDrawable->getFace(texture_index) ;
		if(facep)
		{
			LLViewerMediaTexture* media_tex = LLViewerTextureManager::findMediaTexture(mMediaImplList[texture_index]->getMediaTextureID()) ;
			if(media_tex)
			{
				media_tex->removeMediaFromFace(facep) ;
			}
		}
	}		
	
	//check if some other face(s) of this object reference(s)to this media impl.
	S32 i ;
	S32 end = (S32)mMediaImplList.size() ;
	for(i = 0; i < end ; i++)
	{
		if( i != texture_index && mMediaImplList[i] == mMediaImplList[texture_index])
		{
			break ;
		}
	}

	if(i == end) //this object does not need this media impl.
	{
		mMediaImplList[texture_index]->removeObject(this) ;
	}

	mMediaImplList[texture_index] = NULL ;
	return ;
}

void LLVOVolume::addMediaImpl(LLViewerMediaImpl* media_impl, S32 texture_index)
{
	if((S32)mMediaImplList.size() < texture_index + 1)
	{
		mMediaImplList.resize(texture_index + 1) ;
	}
	
	if(mMediaImplList[texture_index].notNull())
	{
		if(mMediaImplList[texture_index] == media_impl)
		{
			return ;
		}

		removeMediaImpl(texture_index) ;
	}

	mMediaImplList[texture_index] = media_impl;
	media_impl->addObject(this) ;	

	//add the face to show the media if it is in playing
	if(mDrawable)
	{
		LLFace* facep = mDrawable->getFace(texture_index) ;
		if(facep)
		{
			LLViewerMediaTexture* media_tex = LLViewerTextureManager::findMediaTexture(mMediaImplList[texture_index]->getMediaTextureID()) ;
			if(media_tex)
			{
				media_tex->addMediaToFace(facep) ;
			}
		}
		else //the face is not available now, start media on this face later.
		{
			media_impl->setUpdated(TRUE) ;
		}
	}
	return ;
}

viewer_media_t LLVOVolume::getMediaImpl(U8 face_id) const
{
	if(mMediaImplList.size() > face_id)
	{
		return mMediaImplList[face_id];
	}
	return NULL;
}

F64 LLVOVolume::getTotalMediaInterest() const
{
	// If this object is currently focused, this object has "high" interest
	if (LLViewerMediaFocus::getInstance()->getFocusedObjectID() == getID())
		return F64_MAX;
	
	F64 interest = (F64)-1.0;  // means not interested;
    
	// If this object is selected, this object has "high" interest, but since 
	// there can be more than one, we still add in calculated impl interest
	// XXX Sadly, 'contains()' doesn't take a const :(
	if (LLSelectMgr::getInstance()->getSelection()->contains(const_cast<LLVOVolume*>(this)))
		interest = F64_MAX / 2.0;
	
	int i = 0;
	const int end = getNumTEs();
	for ( ; i < end; ++i)
	{
		const viewer_media_t &impl = getMediaImpl(i);
		if (!impl.isNull())
		{
			if (interest == (F64)-1.0) interest = (F64)0.0;
			interest += impl->getInterest();
		}
	}
	return interest;
}

S32 LLVOVolume::getFaceIndexWithMediaImpl(const LLViewerMediaImpl* media_impl, S32 start_face_id)
{
	S32 end = (S32)mMediaImplList.size() ;
	for(S32 face_id = start_face_id + 1; face_id < end; face_id++)
	{
		if(mMediaImplList[face_id] == media_impl)
		{
			return face_id ;
		}
	}
	return -1 ;
}

//----------------------------------------------------------------------------

void LLVOVolume::setLightTextureID(LLUUID id)
{
	if (id.notNull())
	{
		if (!hasLightTexture())
		{
			setParameterEntryInUse(LLNetworkData::PARAMS_LIGHT_IMAGE, TRUE, true);
		}
		LLLightImageParams* param_block = (LLLightImageParams*) getParameterEntry(LLNetworkData::PARAMS_LIGHT_IMAGE);
		if (param_block && param_block->getLightTexture() != id)
		{
			param_block->setLightTexture(id);
			parameterChanged(LLNetworkData::PARAMS_LIGHT_IMAGE, true);
		}
	}
	else
	{
		if (hasLightTexture())
		{
			setParameterEntryInUse(LLNetworkData::PARAMS_LIGHT_IMAGE, FALSE, true);
			mLightTexture = NULL;
		}
	}		
}

void LLVOVolume::setSpotLightParams(LLVector3 params)
{
	LLLightImageParams* param_block = (LLLightImageParams*) getParameterEntry(LLNetworkData::PARAMS_LIGHT_IMAGE);
	if (param_block && param_block->getParams() != params)
	{
		param_block->setParams(params);
		parameterChanged(LLNetworkData::PARAMS_LIGHT_IMAGE, true);
	}
}
		
void LLVOVolume::setIsLight(BOOL is_light)
{
	if (is_light != getIsLight())
	{
		if (is_light)
		{
			setParameterEntryInUse(LLNetworkData::PARAMS_LIGHT, TRUE, true);
		}
		else
		{
			setParameterEntryInUse(LLNetworkData::PARAMS_LIGHT, FALSE, true);
		}

		if (is_light)
		{
			// Add it to the pipeline mLightSet
			gPipeline.setLight(mDrawable, TRUE);
		}
		else
		{
			// Not a light.  Remove it from the pipeline's light set.
			gPipeline.setLight(mDrawable, FALSE);
		}
	}
}

void LLVOVolume::setLightColor(const LLColor3& color)
{
	LLLightParams *param_block = (LLLightParams *)getParameterEntry(LLNetworkData::PARAMS_LIGHT);
	if (param_block)
	{
		if (param_block->getColor() != color)
		{
			param_block->setColor(LLColor4(color, param_block->getColor().mV[3]));
			parameterChanged(LLNetworkData::PARAMS_LIGHT, true);
			gPipeline.markTextured(mDrawable);
			mFaceMappingChanged = TRUE;
		}
	}
}

void LLVOVolume::setLightIntensity(F32 intensity)
{
	LLLightParams *param_block = (LLLightParams *)getParameterEntry(LLNetworkData::PARAMS_LIGHT);
	if (param_block)
	{
		if (param_block->getColor().mV[3] != intensity)
		{
			param_block->setColor(LLColor4(LLColor3(param_block->getColor()), intensity));
			parameterChanged(LLNetworkData::PARAMS_LIGHT, true);
		}
	}
}

void LLVOVolume::setLightRadius(F32 radius)
{
	LLLightParams *param_block = (LLLightParams *)getParameterEntry(LLNetworkData::PARAMS_LIGHT);
	if (param_block)
	{
		if (param_block->getRadius() != radius)
		{
			param_block->setRadius(radius);
			parameterChanged(LLNetworkData::PARAMS_LIGHT, true);
		}
	}
}

void LLVOVolume::setLightFalloff(F32 falloff)
{
	LLLightParams *param_block = (LLLightParams *)getParameterEntry(LLNetworkData::PARAMS_LIGHT);
	if (param_block)
	{
		if (param_block->getFalloff() != falloff)
		{
			param_block->setFalloff(falloff);
			parameterChanged(LLNetworkData::PARAMS_LIGHT, true);
		}
	}
}

void LLVOVolume::setLightCutoff(F32 cutoff)
{
	LLLightParams *param_block = (LLLightParams *)getParameterEntry(LLNetworkData::PARAMS_LIGHT);
	if (param_block)
	{
		if (param_block->getCutoff() != cutoff)
		{
			param_block->setCutoff(cutoff);
			parameterChanged(LLNetworkData::PARAMS_LIGHT, true);
		}
	}
}

//---------------------------------