merge

1 files changed, 3540 insertions, 0 deletions

diff --git a/indra/newview/llmeshrepository.cpp b/indra/newview/llmeshrepository.cpp
new file mode 100644
index 0000000000..e20e918a2a
--- /dev/null
+++ b/indra/newview/llmeshrepository.cpp
@@ -0,0 +1,3540 @@
+/** 
+ * @file llmeshrepository.cpp
+ * @brief Mesh repository implementation.
+ *
+ * $LicenseInfo:firstyear=2005&license=viewerlgpl$
+ * 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 "apr_pools.h"
+#include "apr_dso.h"
+#include "llhttpstatuscodes.h"
+#include "llmeshrepository.h"
+
+#include "llagent.h"
+#include "llappviewer.h"
+#include "llbufferstream.h"
+#include "llcurl.h"
+#include "llfasttimer.h"
+#include "llfloatermodelpreview.h"
+#include "llfloaterperms.h"
+#include "lleconomy.h"
+#include "llimagej2c.h"
+#include "llhost.h"
+#include "llnotificationsutil.h"
+#include "llsd.h"
+#include "llsdutil_math.h"
+#include "llsdserialize.h"
+#include "llthread.h"
+#include "llvfile.h"
+#include "llviewercontrol.h"
+#include "llviewermenufile.h"
+#include "llviewerobjectlist.h"
+#include "llviewerregion.h"
+#include "llviewertexturelist.h"
+#include "llvolume.h"
+#include "llvolumemgr.h"
+#include "llvovolume.h"
+#include "llworld.h"
+#include "material_codes.h"
+#include "pipeline.h"
+
+#ifndef LL_WINDOWS
+#include "netdb.h"
+#endif
+
+#include <queue>
+
+LLFastTimer::DeclareTimer FTM_MESH_UPDATE("Mesh Update");
+LLFastTimer::DeclareTimer FTM_LOAD_MESH("Load Mesh");
+
+LLMeshRepository gMeshRepo;
+
+const U32 MAX_MESH_REQUESTS_PER_SECOND = 100;
+
+U32 LLMeshRepository::sBytesReceived = 0;
+U32 LLMeshRepository::sHTTPRequestCount = 0;
+U32 LLMeshRepository::sHTTPRetryCount = 0;
+U32 LLMeshRepository::sCacheBytesRead = 0;
+U32 LLMeshRepository::sCacheBytesWritten = 0;
+U32 LLMeshRepository::sPeakKbps = 0;
+	
+
+const U32 MAX_TEXTURE_UPLOAD_RETRIES = 5;
+
+std::string header_lod[] = 
+{
+	"lowest_lod",
+	"low_lod",
+	"medium_lod",
+	"high_lod"
+};
+
+
+//get the number of bytes resident in memory for given volume
+U32 get_volume_memory_size(const LLVolume* volume)
+{
+	U32 indices = 0;
+	U32 vertices = 0;
+
+	for (U32 i = 0; i < volume->getNumVolumeFaces(); ++i)
+	{
+		const LLVolumeFace& face = volume->getVolumeFace(i);
+		indices += face.mNumIndices;
+		vertices += face.mNumVertices;
+	}
+
+
+	return indices*2+vertices*11+sizeof(LLVolume)+sizeof(LLVolumeFace)*volume->getNumVolumeFaces();
+}
+
+void get_vertex_buffer_from_mesh(LLCDMeshData& mesh, LLModel::PhysicsMesh& res, F32 scale = 1.f)
+{
+	res.mPositions.clear();
+	res.mNormals.clear();
+	
+	const F32* v = mesh.mVertexBase;
+
+	if (mesh.mIndexType == LLCDMeshData::INT_16)
+	{
+		U16* idx = (U16*) mesh.mIndexBase;
+		for (S32 j = 0; j < mesh.mNumTriangles; ++j)
+		{ 
+			F32* mp0 = (F32*) ((U8*)v+idx[0]*mesh.mVertexStrideBytes);
+			F32* mp1 = (F32*) ((U8*)v+idx[1]*mesh.mVertexStrideBytes);
+			F32* mp2 = (F32*) ((U8*)v+idx[2]*mesh.mVertexStrideBytes);
+
+			idx = (U16*) (((U8*)idx)+mesh.mIndexStrideBytes);
+			
+			LLVector3 v0(mp0);
+			LLVector3 v1(mp1);
+			LLVector3 v2(mp2);
+
+			LLVector3 n = (v1-v0)%(v2-v0);
+			n.normalize();
+
+			res.mPositions.push_back(v0*scale);
+			res.mPositions.push_back(v1*scale);
+			res.mPositions.push_back(v2*scale);
+
+			res.mNormals.push_back(n);
+			res.mNormals.push_back(n);
+			res.mNormals.push_back(n);			
+		}
+	}
+	else
+	{
+		U32* idx = (U32*) mesh.mIndexBase;
+		for (S32 j = 0; j < mesh.mNumTriangles; ++j)
+		{ 
+			F32* mp0 = (F32*) ((U8*)v+idx[0]*mesh.mVertexStrideBytes);
+			F32* mp1 = (F32*) ((U8*)v+idx[1]*mesh.mVertexStrideBytes);
+			F32* mp2 = (F32*) ((U8*)v+idx[2]*mesh.mVertexStrideBytes);
+
+			idx = (U32*) (((U8*)idx)+mesh.mIndexStrideBytes);
+			
+			LLVector3 v0(mp0);
+			LLVector3 v1(mp1);
+			LLVector3 v2(mp2);
+
+			LLVector3 n = (v1-v0)%(v2-v0);
+			n.normalize();
+
+			res.mPositions.push_back(v0*scale);
+			res.mPositions.push_back(v1*scale);
+			res.mPositions.push_back(v2*scale);
+
+			res.mNormals.push_back(n);
+			res.mNormals.push_back(n);
+			res.mNormals.push_back(n);			
+		}
+	}
+}
+
+S32 LLMeshRepoThread::sActiveHeaderRequests = 0;
+S32 LLMeshRepoThread::sActiveLODRequests = 0;
+U32	LLMeshRepoThread::sMaxConcurrentRequests = 1;
+
+
+class LLTextureCostResponder : public LLCurl::Responder
+{
+public:
+	LLTextureUploadData mData;
+	LLMeshUploadThread* mThread;
+
+	LLTextureCostResponder(LLTextureUploadData data, LLMeshUploadThread* thread) 
+		: mData(data), mThread(thread)
+	{
+
+	}
+
+	virtual void completed(U32 status, const std::string& reason, const LLSD& content)
+	{
+		mThread->mPendingConfirmations--;
+		if (isGoodStatus(status))
+		{
+			mThread->priceResult(mData, content);	
+		}
+		else
+		{
+			llwarns << status << ": " << reason << llendl;
+
+			if (mData.mRetries < MAX_TEXTURE_UPLOAD_RETRIES)
+			{
+				llwarns << "Retrying. (" << ++mData.mRetries << ")" << llendl;
+			
+				if (status == 499 || status == 500)
+				{
+					mThread->uploadTexture(mData);
+				}
+				else
+				{
+					llerrs << "Unhandled status " << status << llendl;
+				}
+			}
+			else
+			{ 
+				llwarns << "Giving up after " << mData.mRetries << " retries." << llendl;
+			}
+		}
+	}
+};
+
+class LLTextureUploadResponder : public LLCurl::Responder
+{
+public:
+	LLTextureUploadData mData;
+	LLMeshUploadThread* mThread;
+
+	LLTextureUploadResponder(LLTextureUploadData data, LLMeshUploadThread* thread)
+		: mData(data), mThread(thread)
+	{
+	}
+
+	virtual void completed(U32 status, const std::string& reason, const LLSD& content)
+	{
+		mThread->mPendingUploads--;
+		if (isGoodStatus(status))
+		{
+			mData.mUUID = content["new_asset"].asUUID();
+			gMeshRepo.updateInventory(LLMeshRepository::inventory_data(mData.mPostData, content));
+			mThread->onTextureUploaded(mData);
+		}
+		else
+		{
+			llwarns << status << ": " << reason << llendl;
+			llwarns << "Retrying. (" << ++mData.mRetries << ")" << llendl;
+
+			if (status == 404)
+			{
+				mThread->uploadTexture(mData);
+			}
+			else if (status == 499)
+			{
+				mThread->mConfirmedTextureQ.push(mData);
+			}
+			else
+			{
+				llerrs << "Unhandled status " << status << llendl;
+			}
+		}
+	}
+};
+
+class LLMeshCostResponder : public LLCurl::Responder
+{
+public:
+	LLMeshUploadData mData;
+	LLMeshUploadThread* mThread;
+
+	LLMeshCostResponder(LLMeshUploadData data, LLMeshUploadThread* thread) 
+		: mData(data), mThread(thread)
+	{
+
+	}
+
+	virtual void completed(U32 status, const std::string& reason, const LLSD& content)
+	{
+		mThread->mPendingConfirmations--;
+
+		if (isGoodStatus(status))
+		{
+			mThread->priceResult(mData, content);	
+		}
+		else
+		{
+			llwarns << status << ": " << reason << llendl;			
+			
+			if (status == HTTP_INTERNAL_ERROR)
+			{
+				llwarns << "Retrying. (" << ++mData.mRetries << ")" << llendl;
+				mThread->uploadModel(mData);
+			}
+			else if (status == HTTP_BAD_REQUEST)
+			{
+				llwarns << "Status 400 received from server, giving up." << llendl;
+			}
+			else if (status == HTTP_NOT_FOUND)
+			{
+				llwarns <<"Status 404 received, server is disconnected, giving up." << llendl ;
+			}
+			else
+			{
+				llerrs << "Unhandled status " << status << llendl;
+			}
+		}
+	}
+};
+
+class LLMeshUploadResponder : public LLCurl::Responder
+{
+public:
+	LLMeshUploadData mData;
+	LLMeshUploadThread* mThread;
+
+	LLMeshUploadResponder(LLMeshUploadData data, LLMeshUploadThread* thread)
+		: mData(data), mThread(thread)
+	{
+	}
+
+	virtual void completed(U32 status, const std::string& reason, const LLSD& content)
+	{
+		mThread->mPendingUploads--;
+		if (isGoodStatus(status))
+		{
+			mData.mUUID = content["new_asset"].asUUID();
+			if (mData.mUUID.isNull())
+			{
+				LLSD args;
+				std::string message = content["error"]["message"];
+				std::string identifier = content["error"]["identifier"];
+				std::string invalidity_identifier = content["error"]["invalidity_identifier"];
+
+				args["MESSAGE"] = message;
+				args["IDENTIFIER"] = identifier;
+				args["INVALIDITY_IDENTIFIER"] = invalidity_identifier;
+				args["LABEL"] = mData.mBaseModel->mLabel;
+
+				gMeshRepo.uploadError(args);
+			}
+			else
+			{
+				gMeshRepo.updateInventory(LLMeshRepository::inventory_data(mData.mPostData, content));
+				mThread->onModelUploaded(mData);
+			}
+		}
+		else
+		{
+			llwarns << status << ": " << reason << llendl;
+			llwarns << "Retrying. (" << ++mData.mRetries << ")" << llendl;
+
+			if (status == 404)
+			{
+				mThread->uploadModel(mData);
+			}
+			else if (status == 499)
+			{
+				mThread->mConfirmedQ.push(mData);
+			}
+			else if (status != 500)
+			{ //drop internal server errors on the floor, otherwise grab
+				llerrs << "Unhandled status " << status << llendl;
+			}
+		}
+	}
+};
+
+
+class LLMeshHeaderResponder : public LLCurl::Responder
+{
+public:
+	LLVolumeParams mMeshParams;
+	
+	LLMeshHeaderResponder(const LLVolumeParams& mesh_params)
+		: mMeshParams(mesh_params)
+	{
+	}
+
+	virtual void completedRaw(U32 status, const std::string& reason,
+							  const LLChannelDescriptors& channels,
+							  const LLIOPipe::buffer_ptr_t& buffer);
+
+};
+
+class LLMeshLODResponder : public LLCurl::Responder
+{
+public:
+	LLVolumeParams mMeshParams;
+	S32 mLOD;
+	U32 mRequestedBytes;
+	U32 mOffset;
+
+	LLMeshLODResponder(const LLVolumeParams& mesh_params, S32 lod, U32 offset, U32 requested_bytes)
+		: mMeshParams(mesh_params), mLOD(lod), mOffset(offset), mRequestedBytes(requested_bytes)
+	{
+	}
+
+	virtual void completedRaw(U32 status, const std::string& reason,
+							  const LLChannelDescriptors& channels,
+							  const LLIOPipe::buffer_ptr_t& buffer);
+
+};
+
+class LLMeshSkinInfoResponder : public LLCurl::Responder
+{
+public:
+	LLUUID mMeshID;
+	U32 mRequestedBytes;
+	U32 mOffset;
+
+	LLMeshSkinInfoResponder(const LLUUID& id, U32 offset, U32 size)
+		: mMeshID(id), mRequestedBytes(size), mOffset(offset)
+	{
+	}
+
+	virtual void completedRaw(U32 status, const std::string& reason,
+							  const LLChannelDescriptors& channels,
+							  const LLIOPipe::buffer_ptr_t& buffer);
+
+};
+
+class LLMeshDecompositionResponder : public LLCurl::Responder
+{
+public:
+	LLUUID mMeshID;
+	U32 mRequestedBytes;
+	U32 mOffset;
+
+	LLMeshDecompositionResponder(const LLUUID& id, U32 offset, U32 size)
+		: mMeshID(id), mRequestedBytes(size), mOffset(offset)
+	{
+	}
+
+	virtual void completedRaw(U32 status, const std::string& reason,
+							  const LLChannelDescriptors& channels,
+							  const LLIOPipe::buffer_ptr_t& buffer);
+
+};
+
+class LLMeshPhysicsShapeResponder : public LLCurl::Responder
+{
+public:
+	LLUUID mMeshID;
+	U32 mRequestedBytes;
+	U32 mOffset;
+
+	LLMeshPhysicsShapeResponder(const LLUUID& id, U32 offset, U32 size)
+		: mMeshID(id), mRequestedBytes(size), mOffset(offset)
+	{
+	}
+
+	virtual void completedRaw(U32 status, const std::string& reason,
+							  const LLChannelDescriptors& channels,
+							  const LLIOPipe::buffer_ptr_t& buffer);
+
+};
+
+
+LLMeshRepoThread::LLMeshRepoThread()
+: LLThread("mesh repo", NULL) 
+{ 
+	mWaiting = false;
+	mMutex = new LLMutex(NULL);
+	mHeaderMutex = new LLMutex(NULL);
+	mSignal = new LLCondition(NULL);
+}
+
+LLMeshRepoThread::~LLMeshRepoThread()
+{
+	delete mMutex;
+	mMutex = NULL;
+	delete mHeaderMutex;
+	mHeaderMutex = NULL;
+	delete mSignal;
+	mSignal = NULL;
+}
+
+void LLMeshRepoThread::run()
+{
+	mCurlRequest = new LLCurlRequest();
+	LLCDResult res = LLConvexDecomposition::initThread();
+	if (res != LLCD_OK)
+	{
+		llwarns << "convex decomposition unable to be loaded" << llendl;
+	}
+
+	while (!LLApp::isQuitting())
+	{
+		mWaiting = true;
+		mSignal->wait();
+		mWaiting = false;
+
+		if (!LLApp::isQuitting())
+		{
+			static U32 count = 0;
+
+			static F32 last_hundred = gFrameTimeSeconds;
+
+			if (gFrameTimeSeconds - last_hundred > 1.f)
+			{ //a second has gone by, clear count
+				last_hundred = gFrameTimeSeconds;
+				count = 0;	
+			}
+
+			// NOTE: throttling intentionally favors LOD requests over header requests
+			
+			while (!mLODReqQ.empty() && count < MAX_MESH_REQUESTS_PER_SECOND && sActiveLODRequests < sMaxConcurrentRequests)
+			{
+				{
+					mMutex->lock();
+					LODRequest req = mLODReqQ.front();
+					mLODReqQ.pop();
+					mMutex->unlock();
+					if (fetchMeshLOD(req.mMeshParams, req.mLOD))
+					{
+						count++;
+					}
+				}
+			}
+
+			while (!mHeaderReqQ.empty() && count < MAX_MESH_REQUESTS_PER_SECOND && sActiveHeaderRequests < sMaxConcurrentRequests)
+			{
+				{
+					mMutex->lock();
+					HeaderRequest req = mHeaderReqQ.front();
+					mHeaderReqQ.pop();
+					mMutex->unlock();
+					if (fetchMeshHeader(req.mMeshParams))
+					{
+						count++;
+					}
+				}
+			}
+
+			{ //mSkinRequests is protected by mSignal
+				std::set<LLUUID> incomplete;
+				for (std::set<LLUUID>::iterator iter = mSkinRequests.begin(); iter != mSkinRequests.end(); ++iter)
+				{
+					LLUUID mesh_id = *iter;
+					if (!fetchMeshSkinInfo(mesh_id))
+					{
+						incomplete.insert(mesh_id);
+					}
+				}
+				mSkinRequests = incomplete;
+			}
+
+			{ //mDecompositionRequests is protected by mSignal
+				std::set<LLUUID> incomplete;
+				for (std::set<LLUUID>::iterator iter = mDecompositionRequests.begin(); iter != mDecompositionRequests.end(); ++iter)
+				{
+					LLUUID mesh_id = *iter;
+					if (!fetchMeshDecomposition(mesh_id))
+					{
+						incomplete.insert(mesh_id);
+					}
+				}
+				mDecompositionRequests = incomplete;
+			}
+
+			{ //mPhysicsShapeRequests is protected by mSignal
+				std::set<LLUUID> incomplete;
+				for (std::set<LLUUID>::iterator iter = mPhysicsShapeRequests.begin(); iter != mPhysicsShapeRequests.end(); ++iter)
+				{
+					LLUUID mesh_id = *iter;
+					if (!fetchMeshPhysicsShape(mesh_id))
+					{
+						incomplete.insert(mesh_id);
+					}
+				}
+				mPhysicsShapeRequests = incomplete;
+			}
+
+			mCurlRequest->process();
+		}
+	}
+	
+	if (mSignal->isLocked())
+	{ //make sure to let go of the mutex associated with the given signal before shutting down
+		mSignal->unlock();
+	}
+
+	res = LLConvexDecomposition::quitThread();
+	if (res != LLCD_OK)
+	{
+		llwarns << "convex decomposition unable to be quit" << llendl;
+	}
+
+	delete mCurlRequest;
+	mCurlRequest = NULL;
+}
+
+void LLMeshRepoThread::loadMeshSkinInfo(const LLUUID& mesh_id)
+{ //protected by mSignal, no locking needed here
+	mSkinRequests.insert(mesh_id);
+}
+
+void LLMeshRepoThread::loadMeshDecomposition(const LLUUID& mesh_id)
+{ //protected by mSignal, no locking needed here
+	mDecompositionRequests.insert(mesh_id);
+}
+
+void LLMeshRepoThread::loadMeshPhysicsShape(const LLUUID& mesh_id)
+{ //protected by mSignal, no locking needed here
+	mPhysicsShapeRequests.insert(mesh_id);
+}
+
+
+void LLMeshRepoThread::loadMeshLOD(const LLVolumeParams& mesh_params, S32 lod)
+{ //protected by mSignal, no locking needed here
+
+	mesh_header_map::iterator iter = mMeshHeader.find(mesh_params.getSculptID());
+	if (iter != mMeshHeader.end())
+	{ //if we have the header, request LOD byte range
+		LODRequest req(mesh_params, lod);
+		{
+			LLMutexLock lock(mMutex);
+			mLODReqQ.push(req);
+		}
+	}
+	else
+	{ 
+		HeaderRequest req(mesh_params);
+		
+		pending_lod_map::iterator pending = mPendingLOD.find(mesh_params);
+
+		if (pending != mPendingLOD.end())
+		{ //append this lod request to existing header request
+			pending->second.push_back(lod);
+			if (pending->second.size() > 4)
+			{
+				llerrs << "WTF?" << llendl;
+			} 
+		}
+		else
+		{ //if no header request is pending, fetch header
+			LLMutexLock lock(mMutex);
+			mHeaderReqQ.push(req);
+			mPendingLOD[mesh_params].push_back(lod);
+		}
+	}
+}
+
+//static 
+std::string LLMeshRepoThread::constructUrl(LLUUID mesh_id)
+{
+	std::string http_url;
+	
+	if (gAgent.getRegion())
+	{
+		http_url = gMeshRepo.mGetMeshCapability; 
+	}
+
+	if (!http_url.empty())
+	{
+		http_url += "/?mesh_id=";
+		http_url += mesh_id.asString().c_str();
+	}
+	else
+	{
+		llwarns << "Current region does not have GetMesh capability!  Cannot load " << mesh_id << ".mesh" << llendl;
+	}
+
+	return http_url;
+}
+
+bool LLMeshRepoThread::fetchMeshSkinInfo(const LLUUID& mesh_id)
+{ //protected by mMutex
+	mHeaderMutex->lock();
+
+	if (mMeshHeader.find(mesh_id) == mMeshHeader.end())
+	{ //we have no header info for this mesh, do nothing
+		mHeaderMutex->unlock();
+		return false;
+	}
+
+	U32 header_size = mMeshHeaderSize[mesh_id];
+
+	if (header_size > 0)
+	{
+		S32 offset = header_size + mMeshHeader[mesh_id]["skin"]["offset"].asInteger();
+		S32 size = mMeshHeader[mesh_id]["skin"]["size"].asInteger();
+
+		mHeaderMutex->unlock();
+
+		if (offset >= 0 && size > 0)
+		{
+			//check VFS for mesh skin info
+			LLVFile file(gVFS, mesh_id, LLAssetType::AT_MESH);
+			if (file.getSize() >= offset+size)
+			{
+				LLMeshRepository::sCacheBytesRead += size;
+				file.seek(offset);
+				U8* buffer = new U8[size];
+				file.read(buffer, size);
+
+				//make sure buffer isn't all 0's (reserved block but not written)
+				bool zero = true;
+				for (S32 i = 0; i < llmin(size, 1024) && zero; ++i)
+				{
+					zero = buffer[i] > 0 ? false : true;
+				}
+
+				if (!zero)
+				{ //attempt to parse
+					if (skinInfoReceived(mesh_id, buffer, size))
+					{
+						delete[] buffer;
+						return true;
+					}
+				}
+
+				delete[] buffer;
+			}
+
+			//reading from VFS failed for whatever reason, fetch from sim
+			std::vector<std::string> headers;
+			headers.push_back("Accept: application/octet-stream");
+
+			std::string http_url = constructUrl(mesh_id);
+			if (!http_url.empty())
+			{
+				++sActiveLODRequests;
+				LLMeshRepository::sHTTPRequestCount++;
+				mCurlRequest->getByteRange(constructUrl(mesh_id), headers, offset, size,
+										   new LLMeshSkinInfoResponder(mesh_id, offset, size));
+			}
+		}
+	}
+	else
+	{	
+		mHeaderMutex->unlock();
+	}
+
+	//early out was not hit, effectively fetched
+	return true;
+}
+
+bool LLMeshRepoThread::fetchMeshDecomposition(const LLUUID& mesh_id)
+{ //protected by mMutex
+	mHeaderMutex->lock();
+
+	if (mMeshHeader.find(mesh_id) == mMeshHeader.end())
+	{ //we have no header info for this mesh, do nothing
+		mHeaderMutex->unlock();
+		return false;
+	}
+
+	U32 header_size = mMeshHeaderSize[mesh_id];
+
+	if (header_size > 0)
+	{
+		S32 offset = header_size + mMeshHeader[mesh_id]["decomposition"]["offset"].asInteger();
+		S32 size = mMeshHeader[mesh_id]["decomposition"]["size"].asInteger();
+
+		mHeaderMutex->unlock();
+
+		if (offset >= 0 && size > 0)
+		{
+			//check VFS for mesh skin info
+			LLVFile file(gVFS, mesh_id, LLAssetType::AT_MESH);
+			if (file.getSize() >= offset+size)
+			{
+				LLMeshRepository::sCacheBytesRead += size;
+				file.seek(offset);
+				U8* buffer = new U8[size];
+				file.read(buffer, size);
+
+				//make sure buffer isn't all 0's (reserved block but not written)
+				bool zero = true;
+				for (S32 i = 0; i < llmin(size, 1024) && zero; ++i)
+				{
+					zero = buffer[i] > 0 ? false : true;
+				}
+
+				if (!zero)
+				{ //attempt to parse
+					if (decompositionReceived(mesh_id, buffer, size))
+					{
+						delete[] buffer;
+						return true;
+					}
+				}
+
+				delete[] buffer;
+			}
+
+			//reading from VFS failed for whatever reason, fetch from sim
+			std::vector<std::string> headers;
+			headers.push_back("Accept: application/octet-stream");
+
+			std::string http_url = constructUrl(mesh_id);
+			if (!http_url.empty())
+			{
+				++sActiveLODRequests;
+				LLMeshRepository::sHTTPRequestCount++;
+				mCurlRequest->getByteRange(http_url, headers, offset, size,
+										   new LLMeshDecompositionResponder(mesh_id, offset, size));
+			}
+		}
+	}
+	else
+	{	
+		mHeaderMutex->unlock();
+	}
+
+	//early out was not hit, effectively fetched
+	return true;
+}
+
+bool LLMeshRepoThread::fetchMeshPhysicsShape(const LLUUID& mesh_id)
+{ //protected by mMutex
+	mHeaderMutex->lock();
+
+	if (mMeshHeader.find(mesh_id) == mMeshHeader.end())
+	{ //we have no header info for this mesh, do nothing
+		mHeaderMutex->unlock();
+		return false;
+	}
+
+	U32 header_size = mMeshHeaderSize[mesh_id];
+
+	if (header_size > 0)
+	{
+		S32 offset = header_size + mMeshHeader[mesh_id]["physics_shape"]["offset"].asInteger();
+		S32 size = mMeshHeader[mesh_id]["physics_shape"]["size"].asInteger();
+
+		mHeaderMutex->unlock();
+
+		if (offset >= 0 && size > 0)
+		{
+			//check VFS for mesh physics shape info
+			LLVFile file(gVFS, mesh_id, LLAssetType::AT_MESH);
+			if (file.getSize() >= offset+size)
+			{
+				LLMeshRepository::sCacheBytesRead += size;
+				file.seek(offset);
+				U8* buffer = new U8[size];
+				file.read(buffer, size);
+
+				//make sure buffer isn't all 0's (reserved block but not written)
+				bool zero = true;
+				for (S32 i = 0; i < llmin(size, 1024) && zero; ++i)
+				{
+					zero = buffer[i] > 0 ? false : true;
+				}
+
+				if (!zero)
+				{ //attempt to parse
+					if (physicsShapeReceived(mesh_id, buffer, size))
+					{
+						delete[] buffer;
+						return true;
+					}
+				}
+
+				delete[] buffer;
+			}
+
+			//reading from VFS failed for whatever reason, fetch from sim
+			std::vector<std::string> headers;
+			headers.push_back("Accept: application/octet-stream");
+
+			std::string http_url = constructUrl(mesh_id);
+			if (!http_url.empty())
+			{
+				++sActiveLODRequests;
+				LLMeshRepository::sHTTPRequestCount++;
+				mCurlRequest->getByteRange(http_url, headers, offset, size,
+										   new LLMeshPhysicsShapeResponder(mesh_id, offset, size));
+			}
+		}
+		else
+		{ //no physics shape whatsoever, report back NULL
+			physicsShapeReceived(mesh_id, NULL, 0);
+		}
+	}
+	else
+	{	
+		mHeaderMutex->unlock();
+	}
+
+	//early out was not hit, effectively fetched
+	return true;
+}
+
+bool LLMeshRepoThread::fetchMeshHeader(const LLVolumeParams& mesh_params)
+{
+	bool retval = false;
+
+	{
+		//look for mesh in asset in vfs
+		LLVFile file(gVFS, mesh_params.getSculptID(), LLAssetType::AT_MESH);
+			
+		S32 size = file.getSize();
+
+		if (size > 0)
+		{
+			U8 buffer[1024];
+			S32 bytes = llmin(size, 1024);
+			LLMeshRepository::sCacheBytesRead += bytes;	
+			file.read(buffer, bytes);
+			if (headerReceived(mesh_params, buffer, bytes))
+			{ //did not do an HTTP request, return false
+				return false;
+			}
+		}
+	}
+
+	//either cache entry doesn't exist or is corrupt, request header from simulator
+
+	std::vector<std::string> headers;
+	headers.push_back("Accept: application/octet-stream");
+
+	std::string http_url = constructUrl(mesh_params.getSculptID());
+	if (!http_url.empty())
+	{
+		++sActiveHeaderRequests;
+		retval = true;
+		//grab first 4KB if we're going to bother with a fetch.  Cache will prevent future fetches if a full mesh fits
+		//within the first 4KB
+		LLMeshRepository::sHTTPRequestCount++;
+		mCurlRequest->getByteRange(http_url, headers, 0, 4096, new LLMeshHeaderResponder(mesh_params));
+	}
+
+	return retval;
+}
+
+bool LLMeshRepoThread::fetchMeshLOD(const LLVolumeParams& mesh_params, S32 lod)
+{ //protected by mMutex
+	mHeaderMutex->lock();
+
+	bool retval = false;
+
+	LLUUID mesh_id = mesh_params.getSculptID();
+	
+	U32 header_size = mMeshHeaderSize[mesh_id];
+
+	if (header_size > 0)
+	{
+		S32 offset = header_size + mMeshHeader[mesh_id][header_lod[lod]]["offset"].asInteger();
+		S32 size = mMeshHeader[mesh_id][header_lod[lod]]["size"].asInteger();
+		mHeaderMutex->unlock();
+		if (offset >= 0 && size > 0)
+		{
+
+			//check VFS for mesh asset
+			LLVFile file(gVFS, mesh_id, LLAssetType::AT_MESH);
+			if (file.getSize() >= offset+size)
+			{
+				LLMeshRepository::sCacheBytesRead += size;
+				file.seek(offset);
+				U8* buffer = new U8[size];
+				file.read(buffer, size);
+
+				//make sure buffer isn't all 0's (reserved block but not written)
+				bool zero = true;
+				for (S32 i = 0; i < llmin(size, 1024) && zero; ++i)
+				{
+					zero = buffer[i] > 0 ? false : true;
+				}
+
+				if (!zero)
+				{ //attempt to parse
+					if (lodReceived(mesh_params, lod, buffer, size))
+					{
+						delete[] buffer;
+						return false;
+					}
+				}
+
+				delete[] buffer;
+			}
+
+			//reading from VFS failed for whatever reason, fetch from sim
+			std::vector<std::string> headers;
+			headers.push_back("Accept: application/octet-stream");
+
+			std::string http_url = constructUrl(mesh_id);
+			if (!http_url.empty())
+			{
+				++sActiveLODRequests;
+				retval = true;
+				LLMeshRepository::sHTTPRequestCount++;
+				mCurlRequest->getByteRange(constructUrl(mesh_id), headers, offset, size,
+										   new LLMeshLODResponder(mesh_params, lod, offset, size));
+			}
+			else
+			{
+				mUnavailableQ.push(LODRequest(mesh_params, lod));
+			}
+		}
+		else
+		{
+			mUnavailableQ.push(LODRequest(mesh_params, lod));
+		}
+	}
+	else
+	{
+		mHeaderMutex->unlock();
+	}
+
+	return retval;
+}
+
+bool LLMeshRepoThread::headerReceived(const LLVolumeParams& mesh_params, U8* data, S32 data_size)
+{
+	LLSD header;
+	
+	U32 header_size = 0;
+	if (data_size > 0)
+	{
+		std::string res_str((char*) data, data_size);
+
+		std::string deprecated_header("<? LLSD/Binary ?>");
+
+		if (res_str.substr(0, deprecated_header.size()) == deprecated_header)
+		{
+			res_str = res_str.substr(deprecated_header.size()+1, data_size);
+			header_size = deprecated_header.size()+1;
+		}
+		data_size = res_str.size();
+
+		std::istringstream stream(res_str);
+
+		if (!LLSDSerialize::fromBinary(header, stream, data_size))
+		{
+			llwarns << "Mesh header parse error.  Not a valid mesh asset!" << llendl;
+			return false;
+		}
+
+		header_size += stream.tellg();
+	}
+	else
+	{
+		llinfos
+			<< "Marking header as non-existent, will not retry." << llendl;
+		header["404"] = 1;
+	}
+
+	{
+		U32 cost = gMeshRepo.calcResourceCost(header);
+
+		LLUUID mesh_id = mesh_params.getSculptID();
+		
+		mHeaderMutex->lock();
+		mMeshHeaderSize[mesh_id] = header_size;
+		mMeshHeader[mesh_id] = header;
+		mMeshResourceCost[mesh_id] = cost;
+		mHeaderMutex->unlock();
+
+		//check for pending requests
+		pending_lod_map::iterator iter = mPendingLOD.find(mesh_params);
+		if (iter != mPendingLOD.end())
+		{
+			LLMutexLock lock(mMutex);
+			for (U32 i = 0; i < iter->second.size(); ++i)
+			{
+				LODRequest req(mesh_params, iter->second[i]);
+				mLODReqQ.push(req);
+			}
+		}
+		mPendingLOD.erase(iter);
+	}
+
+	return true;
+}
+
+bool LLMeshRepoThread::lodReceived(const LLVolumeParams& mesh_params, S32 lod, U8* data, S32 data_size)
+{
+	LLVolume* volume = new LLVolume(mesh_params, LLVolumeLODGroup::getVolumeScaleFromDetail(lod));
+	std::string mesh_string((char*) data, data_size);
+	std::istringstream stream(mesh_string);
+
+	if (volume->unpackVolumeFaces(stream, data_size))
+	{
+		LoadedMesh mesh(volume, mesh_params, lod);
+		if (volume->getNumFaces() > 0)
+		{
+			LLMutexLock lock(mMutex);
+			mLoadedQ.push(mesh);
+			return true;
+		}
+	}
+
+	return false;
+}
+
+bool LLMeshRepoThread::skinInfoReceived(const LLUUID& mesh_id, U8* data, S32 data_size)
+{
+	LLSD skin;
+
+	if (data_size > 0)
+	{
+		std::string res_str((char*) data, data_size);
+
+		std::istringstream stream(res_str);
+
+		if (!unzip_llsd(skin, stream, data_size))
+		{
+			llwarns << "Mesh skin info parse error.  Not a valid mesh asset!" << llendl;
+			return false;
+		}
+	}
+	
+	{
+		LLMeshSkinInfo info(skin);
+		info.mMeshID = mesh_id;
+
+		//llinfos<<"info pelvis offset"<<info.mPelvisOffset<<llendl;
+		mSkinInfoQ.push(info);
+	}
+
+	return true;
+}
+
+bool LLMeshRepoThread::decompositionReceived(const LLUUID& mesh_id, U8* data, S32 data_size)
+{
+	LLSD decomp;
+
+	if (data_size > 0)
+	{ 
+		std::string res_str((char*) data, data_size);
+
+		std::istringstream stream(res_str);
+
+		if (!unzip_llsd(decomp, stream, data_size))
+		{
+			llwarns << "Mesh decomposition parse error.  Not a valid mesh asset!" << llendl;
+			return false;
+		}
+	}
+	
+	{
+		LLModel::Decomposition* d = new LLModel::Decomposition(decomp);
+		d->mMeshID = mesh_id;
+		mDecompositionQ.push(d);
+	}
+
+	return true;
+}
+
+bool LLMeshRepoThread::physicsShapeReceived(const LLUUID& mesh_id, U8* data, S32 data_size)
+{
+	LLSD physics_shape;
+
+	LLModel::Decomposition* d = new LLModel::Decomposition();
+	d->mMeshID = mesh_id;
+
+	if (data == NULL)
+	{ //no data, no physics shape exists
+		d->mPhysicsShapeMesh.clear();
+	}
+	else
+	{
+		LLVolumeParams volume_params;
+		volume_params.setType(LL_PCODE_PROFILE_SQUARE, LL_PCODE_PATH_LINE);
+		volume_params.setSculptID(mesh_id, LL_SCULPT_TYPE_MESH);
+		LLPointer<LLVolume> volume = new LLVolume(volume_params,0);
+		std::string mesh_string((char*) data, data_size);
+		std::istringstream stream(mesh_string);
+
+		if (volume->unpackVolumeFaces(stream, data_size))
+		{
+			//load volume faces into decomposition buffer
+			S32 vertex_count = 0;
+			S32 index_count = 0;
+
+			for (S32 i = 0; i < volume->getNumVolumeFaces(); ++i)
+			{
+				const LLVolumeFace& face = volume->getVolumeFace(i);
+				vertex_count += face.mNumVertices;
+				index_count += face.mNumIndices;
+			}
+
+			d->mPhysicsShapeMesh.clear();
+
+			std::vector<LLVector3>& pos = d->mPhysicsShapeMesh.mPositions;
+			std::vector<LLVector3>& norm = d->mPhysicsShapeMesh.mNormals;
+
+			for (S32 i = 0; i < volume->getNumVolumeFaces(); ++i)
+			{
+				const LLVolumeFace& face = volume->getVolumeFace(i);
+			
+				for (S32 i = 0; i < face.mNumIndices; ++i)
+				{
+					U16 idx = face.mIndices[i];
+
+					pos.push_back(LLVector3(face.mPositions[idx].getF32ptr()));
+					norm.push_back(LLVector3(face.mNormals[idx].getF32ptr()));				
+				}			
+			}
+		}
+	}
+
+	mDecompositionQ.push(d);
+	return true;
+}
+
+LLMeshUploadThread::LLMeshUploadThread(LLMeshUploadThread::instance_list& data, LLVector3& scale, bool upload_textures,
+										bool upload_skin, bool upload_joints)
+: LLThread("mesh upload"),
+	mDiscarded(FALSE)
+{
+	mInstanceList = data;
+	mUploadTextures = upload_textures;
+	mUploadSkin = upload_skin;
+	mUploadJoints = upload_joints;
+	mMutex = new LLMutex(NULL);
+	mCurlRequest = NULL;
+	mPendingConfirmations = 0;
+	mPendingUploads = 0;
+	mPendingCost = 0;
+	mFinished = false;
+	mOrigin = gAgent.getPositionAgent();
+	mHost = gAgent.getRegionHost();
+	
+	mUploadObjectAssetCapability = gAgent.getRegion()->getCapability("UploadObjectAsset");
+	mNewInventoryCapability = gAgent.getRegion()->getCapability("NewFileAgentInventoryVariablePrice");
+
+	mOrigin += gAgent.getAtAxis() * scale.magVec();
+}
+
+LLMeshUploadThread::~LLMeshUploadThread()
+{
+
+}
+
+LLMeshUploadThread::DecompRequest::DecompRequest(LLModel* mdl, LLModel* base_model, LLMeshUploadThread* thread)
+{
+	mStage = "single_hull";
+	mModel = mdl;
+	mDecompID = &mdl->mDecompID;
+	mBaseModel = base_model;
+	mThread = thread;
+	
+	//copy out positions and indices
+	if (mdl)
+	{
+		U16 index_offset = 0;
+
+		mPositions.clear();
+		mIndices.clear();
+			
+		//queue up vertex positions and indices
+		for (S32 i = 0; i < mdl->getNumVolumeFaces(); ++i)
+		{
+			const LLVolumeFace& face = mdl->getVolumeFace(i);
+			if (mPositions.size() + face.mNumVertices > 65535)
+			{
+				continue;
+			}
+
+			for (U32 j = 0; j < face.mNumVertices; ++j)
+			{
+				mPositions.push_back(LLVector3(face.mPositions[j].getF32ptr()));
+			}
+
+			for (U32 j = 0; j < face.mNumIndices; ++j)
+			{
+				mIndices.push_back(face.mIndices[j]+index_offset);
+			}
+
+			index_offset += face.mNumVertices;
+		}
+	}
+
+	mThread->mFinalDecomp = this;
+	mThread->mPhysicsComplete = false;
+}
+
+void LLMeshUploadThread::DecompRequest::completed()
+{
+	if (mThread->mFinalDecomp == this)
+	{
+		mThread->mPhysicsComplete = true;
+	}
+
+	if (mHull.size() != 1)
+	{
+		llerrs << "WTF?" << llendl;
+	}
+
+	mThread->mHullMap[mBaseModel] = mHull[0];
+}
+
+//called in the main thread.
+void LLMeshUploadThread::preStart()
+{
+	//build map of LLModel refs to instances for callbacks
+	for (instance_list::iterator iter = mInstanceList.begin(); iter != mInstanceList.end(); ++iter)
+	{
+		mInstance[iter->mModel].push_back(*iter);
+	}
+}
+
+void LLMeshUploadThread::discard()
+{
+	LLMutexLock lock(mMutex) ;
+	mDiscarded = TRUE ;
+}
+
+BOOL LLMeshUploadThread::isDiscarded()
+{
+	LLMutexLock lock(mMutex) ;
+	return mDiscarded ;
+}
+
+void LLMeshUploadThread::run()
+{
+	if(isDiscarded())
+	{
+		mFinished = true;
+		return ;
+	}
+	
+	mCurlRequest = new LLCurlRequest();	
+
+	std::set<LLViewerTexture* > textures;
+
+	//populate upload queue with relevant models
+	for (instance_map::iterator iter = mInstance.begin(); iter != mInstance.end(); ++iter)
+	{
+		LLMeshUploadData data;
+		data.mBaseModel = iter->first;
+
+		LLModelInstance& instance = *(iter->second.begin());
+
+		for (S32 i = 0; i < 5; i++)
+		{
+			data.mModel[i] = instance.mLOD[i];
+		}
+
+		uploadModel(data);
+
+		if (mUploadTextures)
+		{
+			for (std::vector<LLImportMaterial>::iterator material_iter = instance.mMaterial.begin();
+				material_iter != instance.mMaterial.end(); ++material_iter)
+			{
+
+				if (textures.find(material_iter->mDiffuseMap.get()) == textures.end())
+				{
+					textures.insert(material_iter->mDiffuseMap.get());
+					
+					LLTextureUploadData data(material_iter->mDiffuseMap.get(), material_iter->mDiffuseMapLabel);
+					uploadTexture(data);
+				}
+			}
+		}
+
+		//queue up models for hull generation
+		LLModel* physics = NULL;
+
+		if (data.mModel[LLModel::LOD_PHYSICS].notNull())
+		{
+			physics = data.mModel[LLModel::LOD_PHYSICS];
+		}
+		else if (data.mModel[LLModel::LOD_MEDIUM].notNull())
+		{
+			physics = data.mModel[LLModel::LOD_MEDIUM];
+		}
+		else
+		{
+			physics = data.mModel[LLModel::LOD_HIGH];
+		}
+
+		if (!physics)
+		{
+			llerrs << "WTF?" << llendl;
+		}
+
+		DecompRequest* request = new DecompRequest(physics, data.mBaseModel, this);
+		gMeshRepo.mDecompThread->submitRequest(request);
+	}
+
+	while (!mPhysicsComplete)
+	{
+		apr_sleep(100);
+	}
+
+	//upload textures
+	bool done = false;
+	do
+	{
+		if (!mTextureQ.empty())
+		{
+			sendCostRequest(mTextureQ.front());
+			mTextureQ.pop();
+		}
+
+		if (!mConfirmedTextureQ.empty())
+		{
+			doUploadTexture(mConfirmedTextureQ.front());
+			mConfirmedTextureQ.pop();
+		}
+
+		mCurlRequest->process();
+
+		done = mTextureQ.empty() && mConfirmedTextureQ.empty();
+	}
+	while (!done || mCurlRequest->getQueued() > 0);
+
+	LLSD object_asset;
+	object_asset["objects"] = LLSD::emptyArray();
+
+	done = false;
+	do 
+	{
+		static S32 count = 0;
+		static F32 last_hundred = gFrameTimeSeconds;
+		if (gFrameTimeSeconds - last_hundred > 1.f)
+		{
+			last_hundred = gFrameTimeSeconds;
+			count = 0;
+		}
+
+		//how many requests to push before calling process
+		const S32 PUSH_PER_PROCESS = 32;
+
+		S32 tcount = llmin(count+PUSH_PER_PROCESS, 100);
+
+		while (!mUploadQ.empty() && count < tcount)
+		{ //send any pending upload requests
+			mMutex->lock();
+			LLMeshUploadData data = mUploadQ.front();
+			mUploadQ.pop();
+			mMutex->unlock();
+			sendCostRequest(data);
+			count++;
+		}
+
+		tcount = llmin(count+PUSH_PER_PROCESS, 100);
+		
+		while (!mConfirmedQ.empty() && count < tcount)
+		{ //process any meshes that have been confirmed for upload
+			LLMeshUploadData& data = mConfirmedQ.front();
+			doUploadModel(data);
+			mConfirmedQ.pop();
+			count++;
+		}
+	
+		tcount = llmin(count+PUSH_PER_PROCESS, 100);
+
+		while (!mInstanceQ.empty() && count < tcount && !isDiscarded())
+		{ //create any objects waiting for upload
+			count++;
+			object_asset["objects"].append(createObject(mInstanceQ.front()));
+			mInstanceQ.pop();
+		}
+			
+		mCurlRequest->process();
+			
+		done = isDiscarded() || (mInstanceQ.empty() && mConfirmedQ.empty() && mUploadQ.empty());
+	}
+	while (!done || mCurlRequest->getQueued() > 0);
+
+	delete mCurlRequest;
+	mCurlRequest = NULL;
+
+	// now upload the object asset
+	std::string url = mUploadObjectAssetCapability;
+
+	if (object_asset["objects"][0].has("permissions"))
+	{ //copy permissions from first available object to be used for coalesced object
+		object_asset["permissions"] = object_asset["objects"][0]["permissions"];
+	}
+
+	if(!isDiscarded())
+	{
+		LLHTTPClient::post(url, object_asset, new LLHTTPClient::Responder());
+	}
+
+	mFinished = true;
+}
+
+void LLMeshUploadThread::uploadModel(LLMeshUploadData& data)
+{ //called from arbitrary thread
+	{
+		LLMutexLock lock(mMutex);
+		mUploadQ.push(data);
+	}
+}
+
+void LLMeshUploadThread::uploadTexture(LLTextureUploadData& data)
+{ //called from mesh upload thread
+	mTextureQ.push(data);	
+}
+
+
+static LLFastTimer::DeclareTimer FTM_NOTIFY_MESH_LOADED("Notify Loaded");
+static LLFastTimer::DeclareTimer FTM_NOTIFY_MESH_UNAVAILABLE("Notify Unavailable");
+
+void LLMeshRepoThread::notifyLoadedMeshes()
+{
+	while (!mLoadedQ.empty())
+	{
+		mMutex->lock();
+		LoadedMesh mesh = mLoadedQ.front();
+		mLoadedQ.pop();
+		mMutex->unlock();
+		
+		if (mesh.mVolume && mesh.mVolume->getNumVolumeFaces() > 0)
+		{
+			gMeshRepo.notifyMeshLoaded(mesh.mMeshParams, mesh.mVolume);
+		}
+		else
+		{
+			gMeshRepo.notifyMeshUnavailable(mesh.mMeshParams, 
+				LLVolumeLODGroup::getVolumeDetailFromScale(mesh.mVolume->getDetail()));
+		}
+	}
+
+	while (!mUnavailableQ.empty())
+	{
+		mMutex->lock();
+		LODRequest req = mUnavailableQ.front();
+		mUnavailableQ.pop();
+		mMutex->unlock();
+		
+		gMeshRepo.notifyMeshUnavailable(req.mMeshParams, req.mLOD);
+	}
+
+	while (!mSkinInfoQ.empty())
+	{
+		gMeshRepo.notifySkinInfoReceived(mSkinInfoQ.front());
+		mSkinInfoQ.pop();
+	}
+
+	while (!mDecompositionQ.empty())
+	{
+		gMeshRepo.notifyDecompositionReceived(mDecompositionQ.front());
+		mDecompositionQ.pop();
+	}
+}
+
+S32 LLMeshRepoThread::getActualMeshLOD(const LLVolumeParams& mesh_params, S32 lod) 
+{ //only ever called from main thread
+	LLMutexLock lock(mHeaderMutex);
+	mesh_header_map::iterator iter = mMeshHeader.find(mesh_params.getSculptID());
+
+	if (iter != mMeshHeader.end())
+	{
+		LLSD& header = iter->second;
+
+		return LLMeshRepository::getActualMeshLOD(header, lod);
+	}
+
+	return lod;
+}
+
+//static
+S32 LLMeshRepository::getActualMeshLOD(LLSD& header, S32 lod)
+{
+	lod = llclamp(lod, 0, 3);
+
+	if (header.has("404"))
+	{
+		return -1;
+	}
+
+	if (header[header_lod[lod]]["size"].asInteger() > 0)
+	{
+		return lod;
+	}
+
+	//search down to find the next available lower lod
+	for (S32 i = lod-1; i >= 0; --i)
+	{
+		if (header[header_lod[i]]["size"].asInteger() > 0)
+		{
+			return i;
+		}
+	}
+
+	//search up to find then ext available higher lod
+	for (S32 i = lod+1; i < 4; ++i)
+	{
+		if (header[header_lod[i]]["size"].asInteger() > 0)
+		{
+			return i;
+		}
+	}
+
+	//header exists and no good lod found, treat as 404
+	header["404"] = 1;
+	return -1;
+}
+
+U32 LLMeshRepoThread::getResourceCost(const LLUUID& mesh_id)
+{
+	LLMutexLock lock(mHeaderMutex);
+	
+	std::map<LLUUID, U32>::iterator iter = mMeshResourceCost.find(mesh_id);
+	if (iter != mMeshResourceCost.end())
+	{
+		return iter->second;
+	}
+
+	return 0;
+}
+
+void LLMeshRepository::cacheOutgoingMesh(LLMeshUploadData& data, LLSD& header)
+{
+	mThread->mMeshHeader[data.mUUID] = header;
+
+	// we cache the mesh for default parameters
+	LLVolumeParams volume_params;
+	volume_params.setType(LL_PCODE_PROFILE_SQUARE, LL_PCODE_PATH_LINE);
+	volume_params.setSculptID(data.mUUID, LL_SCULPT_TYPE_MESH);
+
+	for (U32 i = 0; i < 4; i++)
+	{
+		if (data.mModel[i].notNull())
+		{
+			LLPointer<LLVolume> volume = new LLVolume(volume_params, LLVolumeLODGroup::getVolumeScaleFromDetail(i));
+			volume->copyVolumeFaces(data.mModel[i]);
+		}
+	}
+
+}
+
+void LLMeshLODResponder::completedRaw(U32 status, const std::string& reason,
+							  const LLChannelDescriptors& channels,
+							  const LLIOPipe::buffer_ptr_t& buffer)
+{
+
+	LLMeshRepoThread::sActiveLODRequests--;
+	S32 data_size = buffer->countAfter(channels.in(), NULL);
+
+	if (status < 200 || status > 400)
+	{
+		llwarns << status << ": " << reason << llendl;
+	}
+
+	if (data_size < mRequestedBytes)
+	{
+		if (status == 499 || status == 503)
+		{ //timeout or service unavailable, try again
+			LLMeshRepository::sHTTPRetryCount++;
+			gMeshRepo.mThread->loadMeshLOD(mMeshParams, mLOD);
+		}
+		else
+		{
+			llwarns << "Unhandled status " << status << llendl;
+		}
+		return;
+	}
+
+	LLMeshRepository::sBytesReceived += mRequestedBytes;
+
+	U8* data = NULL;
+
+	if (data_size > 0)
+	{
+		data = new U8[data_size];
+		buffer->readAfter(channels.in(), NULL, data, data_size);
+	}
+
+	if (gMeshRepo.mThread->lodReceived(mMeshParams, mLOD, data, data_size))
+	{
+		//good fetch from sim, write to VFS for caching
+		LLVFile file(gVFS, mMeshParams.getSculptID(), LLAssetType::AT_MESH, LLVFile::WRITE);
+
+		S32 offset = mOffset;
+		S32 size = mRequestedBytes;
+
+		if (file.getSize() >= offset+size)
+		{
+			file.seek(offset);
+			file.write(data, size);
+			LLMeshRepository::sCacheBytesWritten += size;
+		}
+	}
+
+	delete [] data;
+}
+
+void LLMeshSkinInfoResponder::completedRaw(U32 status, const std::string& reason,
+							  const LLChannelDescriptors& channels,
+							  const LLIOPipe::buffer_ptr_t& buffer)
+{
+	S32 data_size = buffer->countAfter(channels.in(), NULL);
+
+	if (status < 200 || status > 400)
+	{
+		llwarns << status << ": " << reason << llendl;
+	}
+
+	if (data_size < mRequestedBytes)
+	{
+		if (status == 499 || status == 503)
+		{ //timeout or service unavailable, try again
+			LLMeshRepository::sHTTPRetryCount++;
+			gMeshRepo.mThread->loadMeshSkinInfo(mMeshID);
+		}
+		else
+		{
+			llwarns << "Unhandled status " << status << llendl;
+		}
+		return;
+	}
+
+	LLMeshRepository::sBytesReceived += mRequestedBytes;
+
+	U8* data = NULL;
+
+	if (data_size > 0)
+	{
+		data = new U8[data_size];
+		buffer->readAfter(channels.in(), NULL, data, data_size);
+	}
+
+	if (gMeshRepo.mThread->skinInfoReceived(mMeshID, data, data_size))
+	{
+		//good fetch from sim, write to VFS for caching
+		LLVFile file(gVFS, mMeshID, LLAssetType::AT_MESH, LLVFile::WRITE);
+
+		S32 offset = mOffset;
+		S32 size = mRequestedBytes;
+
+		if (file.getSize() >= offset+size)
+		{
+			LLMeshRepository::sCacheBytesWritten += size;
+			file.seek(offset);
+			file.write(data, size);
+		}
+	}
+
+	delete [] data;
+}
+
+void LLMeshDecompositionResponder::completedRaw(U32 status, const std::string& reason,
+							  const LLChannelDescriptors& channels,
+							  const LLIOPipe::buffer_ptr_t& buffer)
+{
+	S32 data_size = buffer->countAfter(channels.in(), NULL);
+
+	if (status < 200 || status > 400)
+	{
+		llwarns << status << ": " << reason << llendl;
+	}
+
+	if (data_size < mRequestedBytes)
+	{
+		if (status == 499 || status == 503)
+		{ //timeout or service unavailable, try again
+			LLMeshRepository::sHTTPRetryCount++;
+			gMeshRepo.mThread->loadMeshDecomposition(mMeshID);
+		}
+		else
+		{
+			llwarns << "Unhandled status " << status << llendl;
+		}
+		return;
+	}
+
+	LLMeshRepository::sBytesReceived += mRequestedBytes;
+
+	U8* data = NULL;
+
+	if (data_size > 0)
+	{
+		data = new U8[data_size];
+		buffer->readAfter(channels.in(), NULL, data, data_size);
+	}
+
+	if (gMeshRepo.mThread->decompositionReceived(mMeshID, data, data_size))
+	{
+		//good fetch from sim, write to VFS for caching
+		LLVFile file(gVFS, mMeshID, LLAssetType::AT_MESH, LLVFile::WRITE);
+
+		S32 offset = mOffset;
+		S32 size = mRequestedBytes;
+
+		if (file.getSize() >= offset+size)
+		{
+			LLMeshRepository::sCacheBytesWritten += size;
+			file.seek(offset);
+			file.write(data, size);
+		}
+	}
+
+	delete [] data;
+}
+
+void LLMeshPhysicsShapeResponder::completedRaw(U32 status, const std::string& reason,
+							  const LLChannelDescriptors& channels,
+							  const LLIOPipe::buffer_ptr_t& buffer)
+{
+	S32 data_size = buffer->countAfter(channels.in(), NULL);
+
+	if (status < 200 || status > 400)
+	{
+		llwarns << status << ": " << reason << llendl;
+	}
+
+	if (data_size < mRequestedBytes)
+	{
+		if (status == 499 || status == 503)
+		{ //timeout or service unavailable, try again
+			LLMeshRepository::sHTTPRetryCount++;
+			gMeshRepo.mThread->loadMeshPhysicsShape(mMeshID);
+		}
+		else
+		{
+			llwarns << "Unhandled status " << status << llendl;
+		}
+		return;
+	}
+
+	LLMeshRepository::sBytesReceived += mRequestedBytes;
+
+	U8* data = NULL;
+
+	if (data_size > 0)
+	{
+		data = new U8[data_size];
+		buffer->readAfter(channels.in(), NULL, data, data_size);
+	}
+
+	if (gMeshRepo.mThread->physicsShapeReceived(mMeshID, data, data_size))
+	{
+		//good fetch from sim, write to VFS for caching
+		LLVFile file(gVFS, mMeshID, LLAssetType::AT_MESH, LLVFile::WRITE);
+
+		S32 offset = mOffset;
+		S32 size = mRequestedBytes;
+
+		if (file.getSize() >= offset+size)
+		{
+			LLMeshRepository::sCacheBytesWritten += size;
+			file.seek(offset);
+			file.write(data, size);
+		}
+	}
+
+	delete [] data;
+}
+
+void LLMeshHeaderResponder::completedRaw(U32 status, const std::string& reason,
+							  const LLChannelDescriptors& channels,
+							  const LLIOPipe::buffer_ptr_t& buffer)
+{
+	LLMeshRepoThread::sActiveHeaderRequests--;
+	if (status < 200 || status > 400)
+	{
+		//llwarns
+		//	<< "Header responder failed with status: "
+		//	<< status << ": " << reason << llendl;
+
+		// 503 (service unavailable) or 499 (timeout)
+		// can be due to server load and can be retried
+
+		// TODO*: Add maximum retry logic, exponential backoff
+		// and (somewhat more optional than the others) retries
+		// again after some set period of time
+		if (status == 503 || status == 499)
+		{ //retry
+			LLMeshRepository::sHTTPRetryCount++;
+			LLMeshRepoThread::HeaderRequest req(mMeshParams);
+			LLMutexLock lock(gMeshRepo.mThread->mMutex);
+			gMeshRepo.mThread->mHeaderReqQ.push(req);
+
+			return;
+		}
+	}
+
+	S32 data_size = buffer->countAfter(channels.in(), NULL);
+
+	U8* data = NULL;
+
+	if (data_size > 0)
+	{
+		data = new U8[data_size];
+		buffer->readAfter(channels.in(), NULL, data, data_size);
+	}
+
+	LLMeshRepository::sBytesReceived += llmin(data_size, 4096);
+
+	if (!gMeshRepo.mThread->headerReceived(mMeshParams, data, data_size))
+	{
+		llwarns
+			<< "Unable to parse mesh header: "
+			<< status << ": " << reason << llendl;
+	}
+	else if (data && data_size > 0)
+	{
+		//header was successfully retrieved from sim, cache in vfs
+		LLUUID mesh_id = mMeshParams.getSculptID();
+		LLSD header = gMeshRepo.mThread->mMeshHeader[mesh_id];
+
+		std::stringstream str;
+
+		S32 lod_bytes = 0;
+
+		for (U32 i = 0; i < LLModel::LOD_PHYSICS; ++i)
+		{ //figure out how many bytes we'll need to reserve in the file
+			std::string lod_name = header_lod[i];
+			lod_bytes = llmax(lod_bytes, header[lod_name]["offset"].asInteger()+header[lod_name]["size"].asInteger());
+		}
+		
+		//just in case skin info or decomposition is at the end of the file (which it shouldn't be)
+		lod_bytes = llmax(lod_bytes, header["skin"]["offset"].asInteger() + header["skin"]["size"].asInteger());
+		lod_bytes = llmax(lod_bytes, header["decomposition"]["offset"].asInteger() + header["decomposition"]["size"].asInteger());
+
+		S32 header_bytes = (S32) gMeshRepo.mThread->mMeshHeaderSize[mesh_id];
+		S32 bytes = lod_bytes + header_bytes; 
+
+		
+		//it's possible for the remote asset to have more data than is needed for the local cache
+		//only allocate as much space in the VFS as is needed for the local cache
+		data_size = llmin(data_size, bytes);
+
+		LLVFile file(gVFS, mesh_id, LLAssetType::AT_MESH, LLVFile::WRITE);
+		if (file.getMaxSize() >= bytes || file.setMaxSize(bytes))
+		{
+			LLMeshRepository::sCacheBytesWritten += data_size;
+
+			file.write((const U8*) data, data_size);
+			
+			//zero out the rest of the file 
+			U8 block[4096];
+			memset(block, 0, 4096);
+
+			while (bytes-file.tell() > 4096)
+			{
+				file.write(block, 4096);
+			}
+
+			S32 remaining = bytes-file.tell();
+
+			if (remaining < 0 || remaining > 4096)
+			{
+				llerrs << "Bad padding of mesh asset cache entry." << llendl;
+			}
+
+			if (remaining > 0)
+			{
+				file.write(block, remaining);
+			}
+		}
+	}
+
+	delete [] data;
+}
+
+
+LLMeshRepository::LLMeshRepository()
+: mMeshMutex(NULL),
+  mMeshThreadCount(0),
+  mThread(NULL)
+{
+
+}
+
+void LLMeshRepository::init()
+{
+	mMeshMutex = new LLMutex(NULL);
+	
+	LLConvexDecomposition::getInstance()->initSystem();
+
+	mDecompThread = new LLPhysicsDecomp();
+	mDecompThread->start();
+
+	while (!mDecompThread->mInited)
+	{ //wait for physics decomp thread to init
+		apr_sleep(100);
+	}
+
+	
+	
+	mThread = new LLMeshRepoThread();
+	mThread->start();
+}
+
+void LLMeshRepository::shutdown()
+{
+	llinfos << "Shutting down mesh repository." << llendl;
+
+	for (U32 i = 0; i < mUploads.size(); ++i)
+	{
+		llinfos << "Discard the pending mesh uploads " << llendl;
+		mUploads[i]->discard() ; //discard the uploading requests.
+	}
+
+	mThread->mSignal->signal();
+	
+	while (!mThread->isStopped())
+	{
+		apr_sleep(10);
+	}
+	delete mThread;
+	mThread = NULL;
+
+	for (U32 i = 0; i < mUploads.size(); ++i)
+	{
+		llinfos << "Waiting for pending mesh upload " << i << "/" << mUploads.size() << llendl;
+		while (!mUploads[i]->isStopped())
+		{
+			apr_sleep(10);
+		}
+		delete mUploads[i];
+	}
+
+	mUploads.clear();
+
+	delete mMeshMutex;
+	mMeshMutex = NULL;
+
+	llinfos << "Shutting down decomposition system." << llendl;
+
+	if (mDecompThread)
+	{
+		mDecompThread->shutdown();		
+		delete mDecompThread;
+		mDecompThread = NULL;
+	}
+
+	LLConvexDecomposition::quitSystem();
+}
+
+//called in the main thread.
+S32 LLMeshRepository::update()
+{
+	if(mUploadWaitList.empty())
+	{
+		return 0 ;
+	}
+
+	S32 size = mUploadWaitList.size() ;
+	for (S32 i = 0; i < size; ++i)
+	{
+		mUploads.push_back(mUploadWaitList[i]);
+		mUploadWaitList[i]->preStart() ;
+		mUploadWaitList[i]->start() ;
+	}
+	mUploadWaitList.clear() ;
+
+	return size ;
+}
+
+S32 LLMeshRepository::loadMesh(LLVOVolume* vobj, const LLVolumeParams& mesh_params, S32 detail, S32 last_lod)
+{
+	if (detail < 0 || detail > 4)
+	{
+		return detail;
+	}
+
+	LLFastTimer t(FTM_LOAD_MESH); 
+
+	{
+		LLMutexLock lock(mMeshMutex);
+		//add volume to list of loading meshes
+		mesh_load_map::iterator iter = mLoadingMeshes[detail].find(mesh_params);
+		if (iter != mLoadingMeshes[detail].end())
+		{ //request pending for this mesh, append volume id to list
+			iter->second.insert(vobj->getID());
+		}
+		else
+		{
+			//first request for this mesh
+			mLoadingMeshes[detail][mesh_params].insert(vobj->getID());
+			mPendingRequests.push_back(LLMeshRepoThread::LODRequest(mesh_params, detail));
+		}
+	}
+
+	//do a quick search to see if we can't display something while we wait for this mesh to load
+	LLVolume* volume = vobj->getVolume();
+
+	if (volume)
+	{
+		if (volume->getNumVolumeFaces() == 0 && !volume->isTetrahedron())
+		{
+			volume->makeTetrahedron();
+		}
+
+		LLVolumeParams params = volume->getParams();
+
+		LLVolumeLODGroup* group = LLPrimitive::getVolumeManager()->getGroup(params);
+
+		if (group)
+		{
+			//first, see if last_lod is available (don't transition down to avoid funny popping a la SH-641)
+			if (last_lod >= 0)
+			{
+				LLVolume* lod = group->refLOD(last_lod);
+				if (lod && !lod->isTetrahedron() && lod->getNumVolumeFaces() > 0)
+				{
+					group->derefLOD(lod);
+					return last_lod;
+				}
+				group->derefLOD(lod);
+			}
+
+			//next, see what the next lowest LOD available might be
+			for (S32 i = detail-1; i >= 0; --i)
+			{
+				LLVolume* lod = group->refLOD(i);
+				if (lod && !lod->isTetrahedron() && lod->getNumVolumeFaces() > 0)
+				{
+					group->derefLOD(lod);
+					return i;
+				}
+
+				group->derefLOD(lod);
+			}
+
+			//no lower LOD is a available, is a higher lod available?
+			for (S32 i = detail+1; i < 4; ++i)
+			{
+				LLVolume* lod = group->refLOD(i);
+				if (lod && !lod->isTetrahedron() && lod->getNumVolumeFaces() > 0)
+				{
+					group->derefLOD(lod);
+					return i;
+				}
+
+				group->derefLOD(lod);
+			}
+		}
+		else
+		{
+			llerrs << "WTF?" << llendl;
+		}
+	}
+
+	return detail;
+}
+
+static LLFastTimer::DeclareTimer FTM_START_MESH_THREAD("Start Thread");
+static LLFastTimer::DeclareTimer FTM_LOAD_MESH_LOD("Load LOD");
+static LLFastTimer::DeclareTimer FTM_MESH_LOCK1("Lock 1");
+static LLFastTimer::DeclareTimer FTM_MESH_LOCK2("Lock 2");
+
+void LLMeshRepository::notifyLoadedMeshes()
+{ //called from main thread
+
+	LLMeshRepoThread::sMaxConcurrentRequests = gSavedSettings.getU32("MeshMaxConcurrentRequests");
+
+	//clean up completed upload threads
+	for (std::vector<LLMeshUploadThread*>::iterator iter = mUploads.begin(); iter != mUploads.end(); )
+	{
+		LLMeshUploadThread* thread = *iter;
+
+		if (thread->isStopped() && thread->finished())
+		{
+			iter = mUploads.erase(iter);
+			delete thread;
+		}
+		else
+		{
+			++iter;
+		}
+	}
+
+	//update inventory
+	if (!mInventoryQ.empty())
+	{
+		LLMutexLock lock(mMeshMutex);
+		while (!mInventoryQ.empty())
+		{
+			inventory_data& data = mInventoryQ.front();
+
+			LLAssetType::EType asset_type = LLAssetType::lookup(data.mPostData["asset_type"].asString());
+			LLInventoryType::EType inventory_type = LLInventoryType::lookup(data.mPostData["inventory_type"].asString());
+
+			on_new_single_inventory_upload_complete(
+				asset_type,
+				inventory_type,
+				data.mPostData["asset_type"].asString(),
+				data.mPostData["folder_id"].asUUID(),
+				data.mPostData["name"],
+				data.mPostData["description"],
+				data.mResponse,
+				0);
+			
+			mInventoryQ.pop();
+		}
+	}
+
+	//call completed callbacks on finished decompositions
+	mDecompThread->notifyCompleted();
+	
+	if (!mThread->mWaiting)
+	{ //curl thread is churning, wait for it to go idle
+		return;
+	}
+
+	static std::string region_name("never name a region this");
+
+	if (gAgent.getRegion())
+	{ //update capability url 
+		if (gAgent.getRegion()->getName() != region_name && gAgent.getRegion()->capabilitiesReceived())
+		{
+			region_name = gAgent.getRegion()->getName();
+		
+			mGetMeshCapability = gAgent.getRegion()->getCapability("GetMesh");
+		}
+	}
+
+	LLFastTimer t(FTM_MESH_UPDATE);
+
+	{
+		LLFastTimer t(FTM_MESH_LOCK1);
+		mMeshMutex->lock();	
+	}
+
+	{
+		LLFastTimer t(FTM_MESH_LOCK2);
+		mThread->mMutex->lock();
+	}
+	
+	//popup queued error messages from background threads
+	while (!mUploadErrorQ.empty())
+	{
+		LLNotificationsUtil::add("MeshUploadError", mUploadErrorQ.front());
+		mUploadErrorQ.pop();
+	}
+
+	S32 push_count = LLMeshRepoThread::sMaxConcurrentRequests-(LLMeshRepoThread::sActiveHeaderRequests+LLMeshRepoThread::sActiveLODRequests);
+
+	if (push_count > 0)
+	{
+		//calculate "score" for pending requests
+
+		//create score map
+		std::map<LLUUID, F32> score_map;
+
+		for (U32 i = 0; i < 4; ++i)
+		{
+			for (mesh_load_map::iterator iter = mLoadingMeshes[i].begin();  iter != mLoadingMeshes[i].end(); ++iter)
+			{
+				F32 max_score = 0.f;
+				for (std::set<LLUUID>::iterator obj_iter = iter->second.begin(); obj_iter != iter->second.end(); ++obj_iter)
+				{
+					LLViewerObject* object = gObjectList.findObject(*obj_iter);
+
+					if (object)
+					{
+						LLDrawable* drawable = object->mDrawable;
+						if (drawable)
+						{
+							F32 cur_score = drawable->getRadius()/llmax(drawable->mDistanceWRTCamera, 1.f);
+							max_score = llmax(max_score, cur_score);
+						}
+					}
+				}
+				
+				score_map[iter->first.getSculptID()] = max_score;
+			}
+		}
+
+		//set "score" for pending requests
+		for (std::vector<LLMeshRepoThread::LODRequest>::iterator iter = mPendingRequests.begin(); iter != mPendingRequests.end(); ++iter)
+		{
+			iter->mScore = score_map[iter->mMeshParams.getSculptID()];
+		}
+
+		//sort by "score"
+		std::sort(mPendingRequests.begin(), mPendingRequests.end(), LLMeshRepoThread::CompareScoreGreater());
+
+		while (!mPendingRequests.empty() && push_count > 0)
+		{
+			LLFastTimer t(FTM_LOAD_MESH_LOD);
+			LLMeshRepoThread::LODRequest& request = mPendingRequests.front();
+			mThread->loadMeshLOD(request.mMeshParams, request.mLOD);
+			mPendingRequests.erase(mPendingRequests.begin());
+			push_count--;
+		}
+	}
+
+	//send skin info requests
+	while (!mPendingSkinRequests.empty())
+	{
+		mThread->loadMeshSkinInfo(mPendingSkinRequests.front());
+		mPendingSkinRequests.pop();
+	}
+	
+	//send decomposition requests
+	while (!mPendingDecompositionRequests.empty())
+	{
+		mThread->loadMeshDecomposition(mPendingDecompositionRequests.front());
+		mPendingDecompositionRequests.pop();
+	}
+	
+	//send physics shapes decomposition requests
+	while (!mPendingPhysicsShapeRequests.empty())
+	{
+		mThread->loadMeshPhysicsShape(mPendingPhysicsShapeRequests.front());
+		mPendingPhysicsShapeRequests.pop();
+	}
+	
+	mThread->notifyLoadedMeshes();
+
+	mThread->mMutex->unlock();
+	mMeshMutex->unlock();
+
+	mThread->mSignal->signal();
+}
+
+void LLMeshRepository::notifySkinInfoReceived(LLMeshSkinInfo& info)
+{
+	mSkinMap[info.mMeshID] = info;
+	mLoadingSkins.erase(info.mMeshID);
+}
+
+void LLMeshRepository::notifyDecompositionReceived(LLModel::Decomposition* decomp)
+{
+	decomposition_map::iterator iter = mDecompositionMap.find(decomp->mMeshID);
+	if (iter == mDecompositionMap.end())
+	{ //just insert decomp into map
+		mDecompositionMap[decomp->mMeshID] = decomp;
+	}
+	else
+	{ //merge decomp with existing entry
+		iter->second->merge(decomp);
+		delete decomp;
+	}
+
+	mLoadingDecompositions.erase(decomp->mMeshID);
+}
+
+void LLMeshRepository::notifyMeshLoaded(const LLVolumeParams& mesh_params, LLVolume* volume)
+{ //called from main thread
+	S32 detail = LLVolumeLODGroup::getVolumeDetailFromScale(volume->getDetail());
+
+	//get list of objects waiting to be notified this mesh is loaded
+	mesh_load_map::iterator obj_iter = mLoadingMeshes[detail].find(mesh_params);
+
+	if (volume && obj_iter != mLoadingMeshes[detail].end())
+	{
+		//make sure target volume is still valid
+		if (volume->getNumVolumeFaces() <= 0)
+		{
+			llwarns << "Mesh loading returned empty volume." << llendl;
+			volume->makeTetrahedron();
+		}
+		
+		{ //update system volume
+			LLVolume* sys_volume = LLPrimitive::getVolumeManager()->refVolume(mesh_params, detail);
+			if (sys_volume)
+			{
+				sys_volume->copyVolumeFaces(volume);
+				LLPrimitive::getVolumeManager()->unrefVolume(sys_volume);
+			}
+			else
+			{
+				llwarns << "Couldn't find system volume for given mesh." << llendl;
+			}
+		}
+
+		//notify waiting LLVOVolume instances that their requested mesh is available
+		for (std::set<LLUUID>::iterator vobj_iter = obj_iter->second.begin(); vobj_iter != obj_iter->second.end(); ++vobj_iter)
+		{
+			LLVOVolume* vobj = (LLVOVolume*) gObjectList.findObject(*vobj_iter);
+			if (vobj)
+			{
+				vobj->notifyMeshLoaded();
+			}
+		}
+		
+		mLoadingMeshes[detail].erase(mesh_params);
+	}
+}
+
+void LLMeshRepository::notifyMeshUnavailable(const LLVolumeParams& mesh_params, S32 lod)
+{ //called from main thread
+	//get list of objects waiting to be notified this mesh is loaded
+	mesh_load_map::iterator obj_iter = mLoadingMeshes[lod].find(mesh_params);
+
+	F32 detail = LLVolumeLODGroup::getVolumeScaleFromDetail(lod);
+
+	if (obj_iter != mLoadingMeshes[lod].end())
+	{
+		for (std::set<LLUUID>::iterator vobj_iter = obj_iter->second.begin(); vobj_iter != obj_iter->second.end(); ++vobj_iter)
+		{
+			LLVOVolume* vobj = (LLVOVolume*) gObjectList.findObject(*vobj_iter);
+			if (vobj)
+			{
+				LLVolume* obj_volume = vobj->getVolume();
+
+				if (obj_volume && 
+					obj_volume->getDetail() == detail &&
+					obj_volume->getParams() == mesh_params)
+				{ //should force volume to find most appropriate LOD
+					vobj->setVolume(obj_volume->getParams(), lod);
+				}
+			}
+		}
+		
+		mLoadingMeshes[lod].erase(mesh_params);
+	}
+}
+
+S32 LLMeshRepository::getActualMeshLOD(const LLVolumeParams& mesh_params, S32 lod)
+{ 
+	return mThread->getActualMeshLOD(mesh_params, lod);
+}
+
+U32 LLMeshRepository::calcResourceCost(LLSD& header)
+{
+	U32 bytes = 0;
+
+	for (U32 i = 0; i < 4; i++)
+	{
+		bytes += header[header_lod[i]]["size"].asInteger();
+	}
+
+	bytes += header["skin"]["size"].asInteger();
+
+	return bytes/4096 + 1;
+}
+
+U32 LLMeshRepository::getResourceCost(const LLUUID& mesh_id)
+{
+	return mThread->getResourceCost(mesh_id);
+}
+
+const LLMeshSkinInfo* LLMeshRepository::getSkinInfo(const LLUUID& mesh_id)
+{
+	if (mesh_id.notNull())
+	{
+		skin_map::iterator iter = mSkinMap.find(mesh_id);
+		if (iter != mSkinMap.end())
+		{
+			return &(iter->second);
+		}
+		
+		//no skin info known about given mesh, try to fetch it
+		{
+			LLMutexLock lock(mMeshMutex);
+			//add volume to list of loading meshes
+			std::set<LLUUID>::iterator iter = mLoadingSkins.find(mesh_id);
+			if (iter == mLoadingSkins.end())
+			{ //no request pending for this skin info
+				mLoadingSkins.insert(mesh_id);
+				mPendingSkinRequests.push(mesh_id);
+			}
+		}
+	}
+
+	return NULL;
+}
+
+void LLMeshRepository::fetchPhysicsShape(const LLUUID& mesh_id)
+{
+	if (mesh_id.notNull())
+	{
+		LLModel::Decomposition* decomp = NULL;
+		decomposition_map::iterator iter = mDecompositionMap.find(mesh_id);
+		if (iter != mDecompositionMap.end())
+		{
+			decomp = iter->second;
+		}
+		
+		//decomposition block hasn't been fetched yet
+		if (!decomp || decomp->mPhysicsShapeMesh.empty())
+		{
+			LLMutexLock lock(mMeshMutex);
+			//add volume to list of loading meshes
+			std::set<LLUUID>::iterator iter = mLoadingPhysicsShapes.find(mesh_id);
+			if (iter == mLoadingPhysicsShapes.end())
+			{ //no request pending for this skin info
+				mLoadingPhysicsShapes.insert(mesh_id);
+				mPendingPhysicsShapeRequests.push(mesh_id);
+			}
+		}
+	}
+
+}
+
+LLModel::Decomposition* LLMeshRepository::getDecomposition(const LLUUID& mesh_id)
+{
+	LLModel::Decomposition* ret = NULL;
+
+	if (mesh_id.notNull())
+	{
+		decomposition_map::iterator iter = mDecompositionMap.find(mesh_id);
+		if (iter != mDecompositionMap.end())
+		{
+			ret = iter->second;
+		}
+		
+		//decomposition block hasn't been fetched yet
+		if (!ret || ret->mBaseHullMesh.empty())
+		{
+			LLMutexLock lock(mMeshMutex);
+			//add volume to list of loading meshes
+			std::set<LLUUID>::iterator iter = mLoadingDecompositions.find(mesh_id);
+			if (iter == mLoadingDecompositions.end())
+			{ //no request pending for this skin info
+				mLoadingDecompositions.insert(mesh_id);
+				mPendingDecompositionRequests.push(mesh_id);
+			}
+		}
+	}
+
+	return ret;
+}
+
+void LLMeshRepository::buildHull(const LLVolumeParams& params, S32 detail)
+{
+	LLVolume* volume = LLPrimitive::sVolumeManager->refVolume(params, detail);
+
+	if (!volume->mHullPoints)
+	{
+		//all default params
+		//execute first stage
+		//set simplify mode to retain
+		//set retain percentage to zero
+		//run second stage
+	}
+
+	LLPrimitive::sVolumeManager->unrefVolume(volume);
+}
+
+bool LLMeshRepository::hasPhysicsShape(const LLUUID& mesh_id)
+{
+	LLSD mesh = mThread->getMeshHeader(mesh_id);
+	return mesh.has("physics_shape") && mesh["physics_shape"].has("size") && (mesh["physics_shape"]["size"].asInteger() > 0);
+}
+
+LLSD& LLMeshRepository::getMeshHeader(const LLUUID& mesh_id)
+{
+	return mThread->getMeshHeader(mesh_id);
+}
+
+LLSD& LLMeshRepoThread::getMeshHeader(const LLUUID& mesh_id)
+{
+	static LLSD dummy_ret;
+	if (mesh_id.notNull())
+	{
+		LLMutexLock lock(mHeaderMutex);
+		mesh_header_map::iterator iter = mMeshHeader.find(mesh_id);
+		if (iter != mMeshHeader.end())
+		{
+			return iter->second;
+		}
+	}
+
+	return dummy_ret;
+}
+
+
+void LLMeshRepository::uploadModel(std::vector<LLModelInstance>& data, LLVector3& scale, bool upload_textures,
+									bool upload_skin, bool upload_joints)
+{
+	LLMeshUploadThread* thread = new LLMeshUploadThread(data, scale, upload_textures, upload_skin, upload_joints);
+	mUploadWaitList.push_back(thread);
+}
+
+S32 LLMeshRepository::getMeshSize(const LLUUID& mesh_id, S32 lod)
+{
+	if (mThread)
+	{
+		LLMeshRepoThread::mesh_header_map::iterator iter = mThread->mMeshHeader.find(mesh_id);
+		if (iter != mThread->mMeshHeader.end())
+		{
+			LLSD& header = iter->second;
+
+			if (header.has("404"))
+			{
+				return -1;
+			}
+
+			S32 size = header[header_lod[lod]]["size"].asInteger();
+			return size;
+		}
+
+	}
+
+	return -1;
+
+}
+
+void LLMeshUploadThread::sendCostRequest(LLMeshUploadData& data)
+{
+	if(isDiscarded())
+	{
+		return ;
+	}
+
+	//write model file to memory buffer
+	std::stringstream ostr;
+
+	LLModel::Decomposition& decomp =
+		data.mModel[LLModel::LOD_PHYSICS].notNull() ? 
+		data.mModel[LLModel::LOD_PHYSICS]->mPhysics : 
+		data.mBaseModel->mPhysics;
+
+	LLSD header = LLModel::writeModel(
+		ostr,
+		data.mModel[LLModel::LOD_PHYSICS],
+		data.mModel[LLModel::LOD_HIGH],
+		data.mModel[LLModel::LOD_MEDIUM],
+		data.mModel[LLModel::LOD_LOW],
+		data.mModel[LLModel::LOD_IMPOSTOR], 
+		decomp,
+		mUploadSkin,
+		mUploadJoints,
+		true);
+
+	std::string desc = data.mBaseModel->mLabel;
+	
+	// Grab the total vertex count of the model
+	// along with other information for the "asset_resources" map
+	// to send to the server.
+	LLSD asset_resources = LLSD::emptyMap();
+
+
+	std::string url = mNewInventoryCapability; 
+
+	if (!url.empty())
+	{
+		LLSD body = generate_new_resource_upload_capability_body(
+			LLAssetType::AT_MESH,
+			desc,
+			desc,
+			LLFolderType::FT_MESH,
+			LLInventoryType::IT_MESH,
+			LLFloaterPerms::getNextOwnerPerms(),
+			LLFloaterPerms::getGroupPerms(),
+			LLFloaterPerms::getEveryonePerms());
+
+		body["asset_resources"] = asset_resources;
+
+		mPendingConfirmations++;
+		LLCurlRequest::headers_t headers;
+
+		data.mPostData = body;
+
+		mCurlRequest->post(url, headers, body, new LLMeshCostResponder(data, this));
+	}	
+}
+
+void LLMeshUploadThread::sendCostRequest(LLTextureUploadData& data)
+{
+	if(isDiscarded())
+	{
+		return ;
+	}
+
+	if (data.mTexture && data.mTexture->getDiscardLevel() >= 0)
+	{
+		LLSD asset_resources = LLSD::emptyMap();
+
+		std::string url = mNewInventoryCapability; 
+
+		if (!url.empty())
+		{
+			LLSD body = generate_new_resource_upload_capability_body(
+				LLAssetType::AT_TEXTURE,
+				data.mLabel,
+				data.mLabel,
+				LLFolderType::FT_TEXTURE,
+				LLInventoryType::IT_TEXTURE,
+				LLFloaterPerms::getNextOwnerPerms(),
+				LLFloaterPerms::getGroupPerms(),
+				LLFloaterPerms::getEveryonePerms());
+
+			body["asset_resources"] = asset_resources;
+
+			mPendingConfirmations++;
+			LLCurlRequest::headers_t headers;
+			
+			data.mPostData = body;
+			mCurlRequest->post(url, headers, body, new LLTextureCostResponder(data, this));
+		}	
+	}
+}
+
+
+void LLMeshUploadThread::doUploadModel(LLMeshUploadData& data)
+{
+	if(isDiscarded())
+	{
+		return ;
+	}
+
+	if (!data.mRSVP.empty())
+	{
+		std::stringstream ostr;
+
+		LLModel::Decomposition& decomp =
+			data.mModel[LLModel::LOD_PHYSICS].notNull() ? 
+			data.mModel[LLModel::LOD_PHYSICS]->mPhysics : 
+			data.mBaseModel->mPhysics;
+
+		decomp.mBaseHull = mHullMap[data.mBaseModel];
+
+		LLModel::writeModel(
+			ostr,  
+			data.mModel[LLModel::LOD_PHYSICS],
+			data.mModel[LLModel::LOD_HIGH],
+			data.mModel[LLModel::LOD_MEDIUM],
+			data.mModel[LLModel::LOD_LOW],
+			data.mModel[LLModel::LOD_IMPOSTOR], 
+			decomp,
+			mUploadSkin,
+			mUploadJoints);
+
+		data.mAssetData = ostr.str();
+
+		LLCurlRequest::headers_t headers;
+		mPendingUploads++;
+
+		mCurlRequest->post(data.mRSVP, headers, data.mAssetData, new LLMeshUploadResponder(data, this));
+	}
+}
+
+void LLMeshUploadThread::doUploadTexture(LLTextureUploadData& data)
+{
+	if(isDiscarded())
+	{
+		return ;
+	}
+
+	if (!data.mRSVP.empty())
+	{
+		std::stringstream ostr;
+		
+		if (!data.mTexture->isRawImageValid())
+		{
+			data.mTexture->reloadRawImage(data.mTexture->getDiscardLevel());
+		}
+
+		LLPointer<LLImageJ2C> upload_file = LLViewerTextureList::convertToUploadFile(data.mTexture->getRawImage());
+		
+		ostr.write((const char*) upload_file->getData(), upload_file->getDataSize());
+
+		data.mAssetData = ostr.str();
+
+		LLCurlRequest::headers_t headers;
+		mPendingUploads++;
+
+		mCurlRequest->post(data.mRSVP, headers, data.mAssetData, new LLTextureUploadResponder(data, this));
+	}
+}
+
+
+void LLMeshUploadThread::onModelUploaded(LLMeshUploadData& data)
+{
+	createObjects(data);
+}
+
+void LLMeshUploadThread::onTextureUploaded(LLTextureUploadData& data)
+{
+	mTextureMap[data.mTexture] = data;
+}
+
+
+void LLMeshUploadThread::createObjects(LLMeshUploadData& data)
+{
+	instance_list& instances = mInstance[data.mBaseModel];
+
+	for (instance_list::iterator iter = instances.begin(); iter != instances.end(); ++iter)
+	{ //create prims that reference given mesh
+		LLModelInstance& instance = *iter;
+		instance.mMeshID = data.mUUID;
+		mInstanceQ.push(instance);
+	}
+}
+
+LLSD LLMeshUploadThread::createObject(LLModelInstance& instance)
+{
+	LLMatrix4 transformation = instance.mTransform;
+
+	if (instance.mMeshID.isNull())
+	{
+		llerrs << "WTF?" << llendl;
+	}
+
+	// check for reflection
+	BOOL reflected = (transformation.determinant() < 0);
+
+	// compute position
+	LLVector3 position = LLVector3(0, 0, 0) * transformation;
+
+	// compute scale
+	LLVector3 x_transformed = LLVector3(1, 0, 0) * transformation - position;
+	LLVector3 y_transformed = LLVector3(0, 1, 0) * transformation - position;
+	LLVector3 z_transformed = LLVector3(0, 0, 1) * transformation - position;
+	F32 x_length = x_transformed.normalize();
+	F32 y_length = y_transformed.normalize();
+	F32 z_length = z_transformed.normalize();
+	LLVector3 scale = LLVector3(x_length, y_length, z_length);
+
+    // adjust for "reflected" geometry
+	LLVector3 x_transformed_reflected = x_transformed;
+	if (reflected)
+	{
+		x_transformed_reflected *= -1.0;
+	}
+	
+	// compute rotation
+	LLMatrix3 rotation_matrix;
+	rotation_matrix.setRows(x_transformed_reflected, y_transformed, z_transformed);
+	LLQuaternion quat_rotation = rotation_matrix.quaternion();
+	quat_rotation.normalize(); // the rotation_matrix might not have been orthoginal.  make it so here.
+	LLVector3 euler_rotation;
+	quat_rotation.getEulerAngles(&euler_rotation.mV[VX], &euler_rotation.mV[VY], &euler_rotation.mV[VZ]);
+
+	//
+	// build parameter block to construct this prim
+	//
+	
+	LLSD object_params;
+
+	// create prim
+
+	// set volume params
+	U8 sculpt_type = LL_SCULPT_TYPE_MESH;
+	if (reflected)
+	{
+		sculpt_type |= LL_SCULPT_FLAG_MIRROR;
+	}
+	LLVolumeParams  volume_params;
+	volume_params.setType( LL_PCODE_PROFILE_SQUARE, LL_PCODE_PATH_LINE );
+	volume_params.setBeginAndEndS( 0.f, 1.f );
+	volume_params.setBeginAndEndT( 0.f, 1.f );
+	volume_params.setRatio  ( 1, 1 );
+	volume_params.setShear  ( 0, 0 );
+	volume_params.setSculptID(instance.mMeshID, sculpt_type);
+	object_params["shape"] = volume_params.asLLSD();
+
+	object_params["material"] = LL_MCODE_WOOD;
+
+	object_params["group-id"] = gAgent.getGroupID();
+	object_params["pos"] = ll_sd_from_vector3(position + mOrigin);
+	object_params["rotation"] = ll_sd_from_quaternion(quat_rotation);
+	object_params["scale"] = ll_sd_from_vector3(scale);
+	object_params["name"] = instance.mLabel;
+
+	// load material from dae file
+	object_params["facelist"] = LLSD::emptyArray();
+	for (S32 i = 0; i < instance.mMaterial.size(); i++)
+	{
+		LLTextureEntry te;
+		LLImportMaterial& mat = instance.mMaterial[i];
+
+		te.setColor(mat.mDiffuseColor);
+
+		LLUUID diffuse_id = mTextureMap[mat.mDiffuseMap].mUUID;
+
+		if (diffuse_id.notNull())
+		{
+			te.setID(diffuse_id);
+		}
+		else
+		{
+			te.setID(LLUUID("5748decc-f629-461c-9a36-a35a221fe21f")); // blank texture
+		}
+
+		te.setFullbright(mat.mFullbright);
+
+		object_params["facelist"][i] = te.asLLSD();
+	}
+
+	// set extra parameters
+	LLSculptParams sculpt_params;
+	sculpt_params.setSculptTexture(instance.mMeshID);
+	sculpt_params.setSculptType(sculpt_type);
+	U8 buffer[MAX_OBJECT_PARAMS_SIZE+1];
+	LLDataPackerBinaryBuffer dp(buffer, MAX_OBJECT_PARAMS_SIZE);
+	sculpt_params.pack(dp);
+	std::vector<U8> v(dp.getCurrentSize());
+	memcpy(&v[0], buffer, dp.getCurrentSize());
+	LLSD extra_parameter;
+	extra_parameter["extra_parameter"] = sculpt_params.mType;
+	extra_parameter["param_data"] = v;
+	object_params["extra_parameters"].append(extra_parameter);
+
+	LLPermissions perm;
+	perm.setOwnerAndGroup(gAgent.getID(), gAgent.getID(), LLUUID::null, false);
+	perm.setCreator(gAgent.getID());
+
+	perm.initMasks(PERM_ITEM_UNRESTRICTED | PERM_MOVE, //base
+				   PERM_ITEM_UNRESTRICTED | PERM_MOVE, //owner
+				   LLFloaterPerms::getEveryonePerms(),
+				   LLFloaterPerms::getGroupPerms(),
+				   LLFloaterPerms::getNextOwnerPerms());
+		
+	object_params["permissions"] = ll_create_sd_from_permissions(perm);
+
+	object_params["physics_shape_type"] = (U8)(LLViewerObject::PHYSICS_SHAPE_CONVEX_HULL);
+
+	return object_params;
+}
+
+void LLMeshUploadThread::priceResult(LLMeshUploadData& data, const LLSD& content)
+{
+	mPendingCost += content["upload_price"].asInteger();
+	data.mRSVP = content["rsvp"].asString();
+
+	mConfirmedQ.push(data);
+}
+
+void LLMeshUploadThread::priceResult(LLTextureUploadData& data, const LLSD& content)
+{
+	mPendingCost += content["upload_price"].asInteger();
+	data.mRSVP = content["rsvp"].asString();
+
+	mConfirmedTextureQ.push(data);
+}
+
+
+bool LLImportMaterial::operator<(const LLImportMaterial &rhs) const
+{
+	if (mDiffuseMap != rhs.mDiffuseMap)
+	{
+		return mDiffuseMap < rhs.mDiffuseMap;
+	}
+
+	if (mDiffuseMapFilename != rhs.mDiffuseMapFilename)
+	{
+		return mDiffuseMapFilename < rhs.mDiffuseMapFilename;
+	}
+
+	if (mDiffuseMapLabel != rhs.mDiffuseMapLabel)
+	{
+		return mDiffuseMapLabel < rhs.mDiffuseMapLabel;
+	}
+
+	if (mDiffuseColor != rhs.mDiffuseColor)
+	{
+		return mDiffuseColor < rhs.mDiffuseColor;
+	}
+
+	return mFullbright < rhs.mFullbright;
+}
+
+
+void LLMeshRepository::updateInventory(inventory_data data)
+{
+	LLMutexLock lock(mMeshMutex);
+	mInventoryQ.push(data);
+}
+
+void LLMeshRepository::uploadError(LLSD& args)
+{
+	LLMutexLock lock(mMeshMutex);
+	mUploadErrorQ.push(args);
+}
+
+//static
+F32 LLMeshRepository::getStreamingCost(LLSD& header, F32 radius, S32* bytes, S32* bytes_visible, S32 lod)
+{
+	F32 dlowest = llmin(radius/0.03f, 256.f);
+	F32 dlow = llmin(radius/0.06f, 256.f);
+	F32 dmid = llmin(radius/0.24f, 256.f);
+	
+	F32 bytes_lowest = header["lowest_lod"]["size"].asReal()/1024.f;
+	F32 bytes_low = header["low_lod"]["size"].asReal()/1024.f;
+	F32 bytes_mid = header["medium_lod"]["size"].asReal()/1024.f;
+	F32 bytes_high = header["high_lod"]["size"].asReal()/1024.f;
+
+	if (bytes)
+	{
+		*bytes = 0;
+		*bytes += header["lowest_lod"]["size"].asInteger();
+		*bytes += header["low_lod"]["size"].asInteger();
+		*bytes += header["medium_lod"]["size"].asInteger();
+		*bytes += header["high_lod"]["size"].asInteger();
+	}
+
+
+	if (bytes_visible)
+	{
+		lod = LLMeshRepository::getActualMeshLOD(header, lod);
+		if (lod >= 0 && lod <= 3)
+		{
+			*bytes_visible = header[header_lod[lod]]["size"].asInteger();
+		}
+	}
+
+	if (bytes_high == 0.f)
+	{
+		return 0.f;
+	}
+
+	if (bytes_mid == 0.f)
+	{
+		bytes_mid = bytes_high;
+	}
+
+	if (bytes_low == 0.f)
+	{
+		bytes_low = bytes_mid;
+	}
+
+	if (bytes_lowest == 0.f)
+	{
+		bytes_lowest = bytes_low;
+	}
+
+	F32 max_area = 65536.f;
+	F32 min_area = 1.f;
+
+	F32 high_area = llmin(F_PI*dmid*dmid, max_area);
+	F32 mid_area = llmin(F_PI*dlow*dlow, max_area);
+	F32 low_area = llmin(F_PI*dlowest*dlowest, max_area);
+	F32 lowest_area = max_area;
+
+	lowest_area -= low_area;
+	low_area -= mid_area;
+	mid_area -= high_area;
+
+	high_area = llclamp(high_area, min_area, max_area);
+	mid_area = llclamp(mid_area, min_area, max_area);
+	low_area = llclamp(low_area, min_area, max_area);
+	lowest_area = llclamp(lowest_area, min_area, max_area);
+
+	F32 total_area = high_area + mid_area + low_area + lowest_area;
+	high_area /= total_area;
+	mid_area /= total_area;
+	low_area /= total_area;
+	lowest_area /= total_area;
+
+	F32 weighted_avg = bytes_high*high_area +
+					   bytes_mid*mid_area +
+					   bytes_low*low_area +
+					  bytes_lowest*lowest_area;
+
+	return weighted_avg * gSavedSettings.getF32("MeshStreamingCostScaler");
+}
+
+
+LLPhysicsDecomp::LLPhysicsDecomp()
+: LLThread("Physics Decomp")
+{
+	mInited = false;
+	mQuitting = false;
+	mDone = false;
+
+	mSignal = new LLCondition(NULL);
+	mMutex = new LLMutex(NULL);
+}
+
+LLPhysicsDecomp::~LLPhysicsDecomp()
+{
+	shutdown();
+
+	delete mSignal;
+	mSignal = NULL;
+	delete mMutex;
+	mMutex = NULL;
+}
+
+void LLPhysicsDecomp::shutdown()
+{
+	if (mSignal)
+	{
+		mQuitting = true;
+		mSignal->signal();
+
+		while (!isStopped())
+		{
+			apr_sleep(10);
+		}
+	}
+}
+
+void LLPhysicsDecomp::submitRequest(LLPhysicsDecomp::Request* request)
+{
+	LLMutexLock lock(mMutex);
+	mRequestQ.push(request);
+	mSignal->signal();
+}
+
+//static
+S32 LLPhysicsDecomp::llcdCallback(const char* status, S32 p1, S32 p2)
+{	
+	if (gMeshRepo.mDecompThread && gMeshRepo.mDecompThread->mCurRequest.notNull())
+	{
+		return gMeshRepo.mDecompThread->mCurRequest->statusCallback(status, p1, p2);
+	}
+
+	return 1;
+}
+
+void LLPhysicsDecomp::setMeshData(LLCDMeshData& mesh)
+{
+	mesh.mVertexBase = mCurRequest->mPositions[0].mV;
+	mesh.mVertexStrideBytes = 12;
+	mesh.mNumVertices = mCurRequest->mPositions.size();
+
+	mesh.mIndexType = LLCDMeshData::INT_16;
+	mesh.mIndexBase = &(mCurRequest->mIndices[0]);
+	mesh.mIndexStrideBytes = 6;
+	
+	mesh.mNumTriangles = mCurRequest->mIndices.size()/3;
+
+	LLCDResult ret = LLCD_OK;
+	if (LLConvexDecomposition::getInstance() != NULL)
+	{
+		ret  = LLConvexDecomposition::getInstance()->setMeshData(&mesh);
+	}
+
+	if (ret)
+	{
+		llerrs << "Convex Decomposition thread valid but could not set mesh data" << llendl;
+	}
+}
+
+void LLPhysicsDecomp::doDecomposition()
+{
+	LLCDMeshData mesh;
+	S32 stage = mStageID[mCurRequest->mStage];
+
+	//load data intoLLCD
+	if (stage == 0)
+	{
+		setMeshData(mesh);
+	}
+		
+	//build parameter map
+	std::map<std::string, const LLCDParam*> param_map;
+
+	static const LLCDParam* params = NULL;
+	static S32 param_count = 0;
+	if (!params)
+	{
+		param_count = LLConvexDecomposition::getInstance()->getParameters(&params);
+	}
+	
+	for (S32 i = 0; i < param_count; ++i)
+	{
+		param_map[params[i].mName] = params+i;
+	}
+
+	//set parameter values
+	for (decomp_params::iterator iter = mCurRequest->mParams.begin(); iter != mCurRequest->mParams.end(); ++iter)
+	{
+		const std::string& name = iter->first;
+		const LLSD& value = iter->second;
+
+		const LLCDParam* param = param_map[name];
+
+		if (param == NULL)
+		{ //couldn't find valid parameter
+			continue;
+		}
+
+		U32 ret = LLCD_OK;
+
+		if (param->mType == LLCDParam::LLCD_FLOAT)
+		{
+			ret = LLConvexDecomposition::getInstance()->setParam(param->mName, (F32) value.asReal());
+		}
+		else if (param->mType == LLCDParam::LLCD_INTEGER ||
+			param->mType == LLCDParam::LLCD_ENUM)
+		{
+			ret = LLConvexDecomposition::getInstance()->setParam(param->mName, value.asInteger());
+		}
+		else if (param->mType == LLCDParam::LLCD_BOOLEAN)
+		{
+			ret = LLConvexDecomposition::getInstance()->setParam(param->mName, value.asBoolean());
+		}
+
+		if (ret)
+		{
+			llerrs << "WTF?" << llendl;
+		}
+	}
+
+	mCurRequest->setStatusMessage("Executing.");
+
+	LLCDResult ret = LLCD_OK;
+	
+	if (LLConvexDecomposition::getInstance() != NULL)
+	{
+		ret = LLConvexDecomposition::getInstance()->executeStage(stage);
+	}
+
+	if (ret)
+	{
+		llwarns << "Convex Decomposition thread valid but could not execute stage " << stage << llendl;
+		LLMutexLock lock(mMutex);
+
+		mCurRequest->mHull.clear();
+		mCurRequest->mHullMesh.clear();
+
+		mCurRequest->setStatusMessage("FAIL");
+		
+		completeCurrent();
+	}
+	else
+	{
+		mCurRequest->setStatusMessage("Reading results");
+
+		S32 num_hulls =0;
+		if (LLConvexDecomposition::getInstance() != NULL)
+		{
+			num_hulls = LLConvexDecomposition::getInstance()->getNumHullsFromStage(stage);
+		}
+		
+		mMutex->lock();
+		mCurRequest->mHull.clear();
+		mCurRequest->mHull.resize(num_hulls);
+
+		mCurRequest->mHullMesh.clear();
+		mCurRequest->mHullMesh.resize(num_hulls);
+		mMutex->unlock();
+
+		for (S32 i = 0; i < num_hulls; ++i)
+		{
+			std::vector<LLVector3> p;
+			LLCDHull hull;
+			// if LLConvexDecomposition is a stub, num_hulls should have been set to 0 above, and we should not reach this code
+			LLConvexDecomposition::getInstance()->getHullFromStage(stage, i, &hull);
+
+			const F32* v = hull.mVertexBase;
+
+			for (S32 j = 0; j < hull.mNumVertices; ++j)
+			{
+				LLVector3 vert(v[0], v[1], v[2]); 
+				p.push_back(vert);
+				v = (F32*) (((U8*) v) + hull.mVertexStrideBytes);
+			}
+			
+			LLCDMeshData mesh;
+			// if LLConvexDecomposition is a stub, num_hulls should have been set to 0 above, and we should not reach this code
+			LLConvexDecomposition::getInstance()->getMeshFromStage(stage, i, &mesh);
+
+			get_vertex_buffer_from_mesh(mesh, mCurRequest->mHullMesh[i]);
+			
+			mMutex->lock();
+			mCurRequest->mHull[i] = p;
+			mMutex->unlock();
+		}
+	
+		{
+			LLMutexLock lock(mMutex);
+
+			mCurRequest->setStatusMessage("FAIL");
+			completeCurrent();						
+		}
+	}
+}
+
+void LLPhysicsDecomp::completeCurrent()
+{
+	LLMutexLock lock(mMutex);
+	mCompletedQ.push(mCurRequest);
+	mCurRequest = NULL;
+}
+
+void LLPhysicsDecomp::notifyCompleted()
+{
+	if (!mCompletedQ.empty())
+	{
+		LLMutexLock lock(mMutex);
+		while (!mCompletedQ.empty())
+		{
+			Request* req = mCompletedQ.front();
+			req->completed();
+			mCompletedQ.pop();
+		}
+	}
+}
+
+
+void make_box(LLPhysicsDecomp::Request * request)
+{
+	LLVector3 min,max;
+	min = request->mPositions[0];
+	max = min;
+
+	for (U32 i = 0; i < request->mPositions.size(); ++i)
+	{
+		update_min_max(min, max, request->mPositions[i]);
+	}
+
+	request->mHull.clear();
+	
+	LLModel::hull box;
+	box.push_back(LLVector3(min[0],min[1],min[2]));
+	box.push_back(LLVector3(max[0],min[1],min[2]));
+	box.push_back(LLVector3(min[0],max[1],min[2]));
+	box.push_back(LLVector3(max[0],max[1],min[2]));
+	box.push_back(LLVector3(min[0],min[1],max[2]));
+	box.push_back(LLVector3(max[0],min[1],max[2]));
+	box.push_back(LLVector3(min[0],max[1],max[2]));
+	box.push_back(LLVector3(max[0],max[1],max[2]));
+
+	request->mHull.push_back(box);
+}
+
+
+void LLPhysicsDecomp::doDecompositionSingleHull()
+{
+	LLCDMeshData mesh;
+	
+	setMeshData(mesh);
+			
+	
+	//set all parameters to default
+	std::map<std::string, const LLCDParam*> param_map;
+
+	static const LLCDParam* params = NULL;
+	static S32 param_count = 0;
+
+	if (!params)
+	{
+		param_count = LLConvexDecomposition::getInstance()->getParameters(&params);
+	}
+	
+	LLConvexDecomposition* decomp = LLConvexDecomposition::getInstance();
+
+	for (S32 i = 0; i < param_count; ++i)
+	{
+		decomp->setParam(params[i].mName, params[i].mDefault.mIntOrEnumValue);
+	}
+
+	const S32 STAGE_DECOMPOSE = mStageID["Decompose"];
+	const S32 STAGE_SIMPLIFY = mStageID["Simplify"];
+	const S32 DECOMP_PREVIEW = 0;
+	const S32 SIMPLIFY_RETAIN = 0;
+	
+	decomp->setParam("Decompose Quality", DECOMP_PREVIEW);
+	decomp->setParam("Simplify Method", SIMPLIFY_RETAIN);
+	decomp->setParam("Retain%", 0.f);
+
+	LLCDResult ret = LLCD_OK;
+	ret = decomp->executeStage(STAGE_DECOMPOSE);
+	
+	if (ret)
+	{
+		llwarns << "Could not execute decomposition stage when attempting to create single hull." << llendl;
+		make_box(mCurRequest);
+	}
+	else
+	{
+		ret = decomp->executeStage(STAGE_SIMPLIFY);
+
+		if (ret)
+		{
+			llwarns << "Could not execute simiplification stage when attempting to create single hull." << llendl;
+			make_box(mCurRequest);
+		}
+		else
+		{
+			S32 num_hulls =0;
+			if (LLConvexDecomposition::getInstance() != NULL)
+			{
+				num_hulls = LLConvexDecomposition::getInstance()->getNumHullsFromStage(STAGE_SIMPLIFY);
+			}
+			
+			mMutex->lock();
+			mCurRequest->mHull.clear();
+			mCurRequest->mHull.resize(num_hulls);
+			mCurRequest->mHullMesh.clear();
+			mMutex->unlock();
+
+			for (S32 i = 0; i < num_hulls; ++i)
+			{
+				std::vector<LLVector3> p;
+				LLCDHull hull;
+				// if LLConvexDecomposition is a stub, num_hulls should have been set to 0 above, and we should not reach this code
+				LLConvexDecomposition::getInstance()->getHullFromStage(STAGE_SIMPLIFY, i, &hull);
+
+				const F32* v = hull.mVertexBase;
+
+				for (S32 j = 0; j < hull.mNumVertices; ++j)
+				{
+					LLVector3 vert(v[0], v[1], v[2]); 
+					p.push_back(vert);
+					v = (F32*) (((U8*) v) + hull.mVertexStrideBytes);
+				}
+						
+				mMutex->lock();
+				mCurRequest->mHull[i] = p;
+				mMutex->unlock();
+			}
+		}
+	}
+
+
+	{
+		completeCurrent();
+		
+	}
+}
+
+
+void LLPhysicsDecomp::run()
+{
+	LLConvexDecomposition* decomp = LLConvexDecomposition::getInstance();
+	decomp->initThread();
+	mInited = true;
+
+	static const LLCDStageData* stages = NULL;
+	static S32 num_stages = 0;
+	
+	if (!stages)
+	{
+		num_stages = decomp->getStages(&stages);
+	}
+
+	for (S32 i = 0; i < num_stages; i++)
+	{
+		mStageID[stages[i].mName] = i;
+	}
+
+	while (!mQuitting)
+	{
+		mSignal->wait();
+		while (!mQuitting && !mRequestQ.empty())
+		{
+			{
+				LLMutexLock lock(mMutex);
+				mCurRequest = mRequestQ.front();
+				mRequestQ.pop();
+			}
+
+			S32& id = *(mCurRequest->mDecompID);
+			if (id == -1)
+			{
+				decomp->genDecomposition(id);
+			}
+			decomp->bindDecomposition(id);
+
+			if (mCurRequest->mStage == "single_hull")
+			{
+				doDecompositionSingleHull();
+			}
+			else
+			{
+				doDecomposition();
+			}		
+		}
+	}
+
+	decomp->quitThread();
+	
+	if (mSignal->isLocked())
+	{ //let go of mSignal's associated mutex
+		mSignal->unlock();
+	}
+
+	mDone = true;
+}
+
+void LLPhysicsDecomp::Request::setStatusMessage(const std::string& msg)
+{
+	mStatusMessage = msg;
+}
+
+LLModelInstance::LLModelInstance(LLSD& data)
+{
+	mLocalMeshID = data["mesh_id"].asInteger();
+	mLabel = data["label"].asString();
+	mTransform.setValue(data["transform"]);
+
+	for (U32 i = 0; i < data["material"].size(); ++i)
+	{
+		mMaterial.push_back(LLImportMaterial(data["material"][i]));
+	}
+}
+
+
+LLSD LLModelInstance::asLLSD()
+{	
+	LLSD ret;
+
+	ret["mesh_id"] = mModel->mLocalID;
+	ret["label"] = mLabel;
+	ret["transform"] = mTransform.getValue();
+	
+	for (U32 i = 0; i < mMaterial.size(); ++i)
+	{
+		ret["material"][i] = mMaterial[i].asLLSD();
+	}
+
+	return ret;
+}
+
+LLImportMaterial::LLImportMaterial(LLSD& data)
+{
+	mDiffuseMapFilename = data["diffuse"]["filename"].asString();
+	mDiffuseMapLabel = data["diffuse"]["label"].asString();
+	mDiffuseColor.setValue(data["diffuse"]["color"]);
+	mFullbright = data["fullbright"].asBoolean();
+}
+
+
+LLSD LLImportMaterial::asLLSD()
+{
+	LLSD ret;
+
+	ret["diffuse"]["filename"] = mDiffuseMapFilename;
+	ret["diffuse"]["label"] = mDiffuseMapLabel;
+	ret["diffuse"]["color"] = mDiffuseColor.getValue();
+	ret["fullbright"] = mFullbright;
+	
+	return ret;
+}
+
+void LLMeshRepository::buildPhysicsMesh(LLModel::Decomposition& decomp)
+{
+	decomp.mMesh.resize(decomp.mHull.size());
+
+	for (U32 i = 0; i < decomp.mHull.size(); ++i)
+	{
+		LLCDHull hull;
+		hull.mNumVertices = decomp.mHull[i].size();
+		hull.mVertexBase = decomp.mHull[i][0].mV;
+		hull.mVertexStrideBytes = 12;
+
+		LLCDMeshData mesh;
+		LLCDResult res = LLCD_OK;
+		if (LLConvexDecomposition::getInstance() != NULL)
+		{
+			res = LLConvexDecomposition::getInstance()->getMeshFromHull(&hull, &mesh);
+		}
+		if (res == LLCD_OK)
+		{
+			get_vertex_buffer_from_mesh(mesh, decomp.mMesh[i]);
+		}
+	}
+
+	if (!decomp.mBaseHull.empty() && decomp.mBaseHullMesh.empty())
+	{ //get mesh for base hull
+		LLCDHull hull;
+		hull.mNumVertices = decomp.mBaseHull.size();
+		hull.mVertexBase = decomp.mBaseHull[0].mV;
+		hull.mVertexStrideBytes = 12;
+
+		LLCDMeshData mesh;
+		LLCDResult res = LLCD_OK;
+		if (LLConvexDecomposition::getInstance() != NULL)
+		{
+			res = LLConvexDecomposition::getInstance()->getMeshFromHull(&hull, &mesh);
+		}
+		if (res == LLCD_OK)
+		{
+			get_vertex_buffer_from_mesh(mesh, decomp.mBaseHullMesh);
+		}
+	}
+}