merge

1 files changed, 1727 insertions, 0 deletions

diff --git a/indra/llprimitive/llmodel.cpp b/indra/llprimitive/llmodel.cpp
new file mode 100644
index 0000000000..f3f9c29157
--- /dev/null
+++ b/indra/llprimitive/llmodel.cpp
@@ -0,0 +1,1727 @@
+/** 
+ * @file llmodel.cpp
+ * @brief Model handling implementation
+ *
+ * $LicenseInfo:firstyear=2001&license=viewergpl$
+ * 
+ * Copyright (c) 2001-2007, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlife.com/developers/opensource/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at http://secondlife.com/developers/opensource/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "llmodel.h"
+#include "llsdserialize.h"
+#include "llvector4a.h"
+
+#include "dae.h"
+#include "dae/daeErrorHandler.h"
+#include "dom/domConstants.h"
+#include "dom/domMesh.h"
+#include "zlib/zlib.h"
+
+
+std::string model_names[] =
+{
+	"lowest_lod",
+	"low_lod",
+	"medium_lod",
+	"high_lod",
+	"physics_shape"
+};
+
+const int MODEL_NAMES_LENGTH = sizeof(model_names) / sizeof(std::string);
+
+LLModel::LLModel(LLVolumeParams& params, F32 detail)
+	: LLVolume(params, detail), mNormalizedScale(1,1,1), mNormalizedTranslation(0,0,0)
+{
+
+}
+
+void load_face_from_dom_inputs(LLVolumeFace& face, const domInputLocalOffset_Array& inputs, U32 min_idx, U32 max_idx)
+{
+	for (U32 j = 0; j < inputs.getCount(); ++j)
+	{
+		if (strcmp(COMMON_PROFILE_INPUT_VERTEX, inputs[j]->getSemantic()) == 0)
+		{ //found vertex array
+			const domURIFragmentType& uri = inputs[j]->getSource();
+			daeElementRef elem = uri.getElement();
+			domVertices* vertices = (domVertices*) elem.cast();
+
+			domInputLocal_Array& v_inp = vertices->getInput_array();
+			if (inputs[j]->getOffset() != 0)
+			{
+				llerrs << "WTF?" << llendl;
+			}
+
+			for (U32 k = 0; k < v_inp.getCount(); ++k)
+			{
+				if (strcmp(COMMON_PROFILE_INPUT_POSITION, v_inp[k]->getSemantic()) == 0)
+				{
+					const domURIFragmentType& uri = v_inp[k]->getSource();
+					
+					daeElementRef elem = uri.getElement();
+					domSource* src = (domSource*) elem.cast();
+
+					if (src->getTechnique_common()->getAccessor()->getStride() != 3)
+					{
+						llerrs << "WTF?" << llendl;
+					}
+
+					domListOfFloats& v = src->getFloat_array()->getValue();
+
+					LLVector4a min;
+					min.set(v[min_idx], v[min_idx+1], v[min_idx+2]);
+					LLVector4a max = min;
+
+					for (U32 j = min_idx; j <= max_idx; ++j)
+					{ //copy vertex array
+						face.mPositions[j-min_idx].set(v[j*3+0], v[j*3+1], v[j*3+2]);
+						update_min_max(min, max, face.mPositions[j-min_idx]);
+					}
+
+					face.mExtents[0] = min;
+					face.mExtents[1] = max;
+				}
+			}
+		}
+
+		if (strcmp(COMMON_PROFILE_INPUT_NORMAL, inputs[j]->getSemantic()) == 0)
+		{
+			//found normal array for this triangle list
+			const domURIFragmentType& uri = inputs[j]->getSource();
+			daeElementRef elem = uri.getElement();
+			domSource* src = (domSource*) elem.cast();
+			domListOfFloats& n = src->getFloat_array()->getValue();
+			
+			for (U32 j = min_idx; j <= max_idx; ++j)
+			{
+				LLVector4a* norm = (LLVector4a*) face.mNormals + (j-min_idx);
+				norm->set(n[j*3+0], n[j*3+1], n[j*3+2]);
+				norm->normalize3();
+			}
+		}
+		else if (strcmp(COMMON_PROFILE_INPUT_TEXCOORD, inputs[j]->getSemantic()) == 0)
+		{ //found texCoords
+			const domURIFragmentType& uri = inputs[j]->getSource();
+			daeElementRef elem = uri.getElement();
+			domSource* src = (domSource*) elem.cast();
+			domListOfFloats& u = src->getFloat_array()->getValue();
+			
+			for (U32 j = min_idx; j <= max_idx; ++j)
+			{
+				face.mTexCoords[j-min_idx].setVec(u[j*2+0], u[j*2+1]);
+			}
+		}
+	}
+}
+
+void get_dom_sources(const domInputLocalOffset_Array& inputs, S32& pos_offset, S32& tc_offset, S32& norm_offset, S32 &idx_stride,
+					 domSource* &pos_source, domSource* &tc_source, domSource* &norm_source)
+{
+	idx_stride = 0;
+
+	for (U32 j = 0; j < inputs.getCount(); ++j)
+	{
+		idx_stride = llmax((S32) inputs[j]->getOffset(), idx_stride);
+
+		if (strcmp(COMMON_PROFILE_INPUT_VERTEX, inputs[j]->getSemantic()) == 0)
+		{ //found vertex array
+			const domURIFragmentType& uri = inputs[j]->getSource();
+			daeElementRef elem = uri.getElement();
+			domVertices* vertices = (domVertices*) elem.cast();
+
+			domInputLocal_Array& v_inp = vertices->getInput_array();
+			
+			
+			for (U32 k = 0; k < v_inp.getCount(); ++k)
+			{
+				if (strcmp(COMMON_PROFILE_INPUT_POSITION, v_inp[k]->getSemantic()) == 0)
+				{
+					pos_offset = inputs[j]->getOffset();
+
+					const domURIFragmentType& uri = v_inp[k]->getSource();
+					daeElementRef elem = uri.getElement();
+					pos_source = (domSource*) elem.cast();
+				}
+				
+				if (strcmp(COMMON_PROFILE_INPUT_NORMAL, v_inp[k]->getSemantic()) == 0)
+				{
+					norm_offset = inputs[j]->getOffset();
+
+					const domURIFragmentType& uri = v_inp[k]->getSource();
+					daeElementRef elem = uri.getElement();
+					norm_source = (domSource*) elem.cast();
+				}
+			}
+		}
+
+		if (strcmp(COMMON_PROFILE_INPUT_NORMAL, inputs[j]->getSemantic()) == 0)
+		{
+			//found normal array for this triangle list
+			norm_offset = inputs[j]->getOffset();
+			const domURIFragmentType& uri = inputs[j]->getSource();
+			daeElementRef elem = uri.getElement();
+			norm_source = (domSource*) elem.cast();
+		}
+		else if (strcmp(COMMON_PROFILE_INPUT_TEXCOORD, inputs[j]->getSemantic()) == 0)
+		{ //found texCoords
+			tc_offset = inputs[j]->getOffset();
+			const domURIFragmentType& uri = inputs[j]->getSource();
+			daeElementRef elem = uri.getElement();
+			tc_source = (domSource*) elem.cast();
+		}
+	}
+
+	idx_stride += 1;
+}
+
+void load_face_from_dom_triangles(std::vector<LLVolumeFace>& face_list, std::vector<std::string>& materials, domTrianglesRef& tri)
+{
+	LLVolumeFace face;
+	std::vector<LLVolumeFace::VertexData> verts;
+	std::vector<U16> indices;
+	
+	const domInputLocalOffset_Array& inputs = tri->getInput_array();
+
+	S32 pos_offset = -1;
+	S32 tc_offset = -1;
+	S32 norm_offset = -1;
+
+	domSource* pos_source = NULL;
+	domSource* tc_source = NULL;
+	domSource* norm_source = NULL;
+
+	S32 idx_stride = 0;
+
+	get_dom_sources(inputs, pos_offset, tc_offset, norm_offset, idx_stride, pos_source, tc_source, norm_source);
+
+	domPRef p = tri->getP();
+	domListOfUInts& idx = p->getValue();
+	
+	domListOfFloats v;
+	domListOfFloats tc;
+	domListOfFloats n;
+
+	if (pos_source)
+	{
+		v = pos_source->getFloat_array()->getValue();
+		face.mExtents[0].set(v[0], v[1], v[2]);
+		face.mExtents[1].set(v[0], v[1], v[2]);
+	}
+
+	if (tc_source)
+	{
+		tc = tc_source->getFloat_array()->getValue();
+	}
+
+	if (norm_source)
+	{
+		n = norm_source->getFloat_array()->getValue();
+	}
+
+	
+	LLVolumeFace::VertexMapData::PointMap point_map;
+	
+	for (U32 i = 0; i < idx.getCount(); i += idx_stride)
+	{
+		LLVolumeFace::VertexData cv;
+		if (pos_source)
+		{
+			cv.setPosition(LLVector4a(v[idx[i+pos_offset]*3+0],
+								v[idx[i+pos_offset]*3+1],
+								v[idx[i+pos_offset]*3+2]));
+		}
+
+		if (tc_source)
+		{
+			cv.mTexCoord.setVec(tc[idx[i+tc_offset]*2+0],
+								tc[idx[i+tc_offset]*2+1]);
+		}
+
+		if (norm_source)
+		{
+			cv.setNormal(LLVector4a(n[idx[i+norm_offset]*3+0],
+								n[idx[i+norm_offset]*3+1],
+								n[idx[i+norm_offset]*3+2]));
+		}
+
+		
+		BOOL found = FALSE;
+			
+		LLVolumeFace::VertexMapData::PointMap::iterator point_iter;
+		point_iter = point_map.find(LLVector3(cv.getPosition().getF32ptr()));
+		
+		if (point_iter != point_map.end())
+		{
+			for (U32 j = 0; j < point_iter->second.size(); ++j)
+			{
+				if ((point_iter->second)[j] == cv)
+				{
+					found = TRUE;
+					indices.push_back((point_iter->second)[j].mIndex);
+					break;
+				}
+			}
+		}
+
+		if (!found)
+		{
+			update_min_max(face.mExtents[0], face.mExtents[1], cv.getPosition());
+			verts.push_back(cv);
+			if (verts.size() >= 65535)
+			{
+				llerrs << "Attempted to write model exceeding 16-bit index buffer limitation." << llendl;
+			}
+			U16 index = (U16) (verts.size()-1);
+			indices.push_back(index);
+
+			LLVolumeFace::VertexMapData d;
+			d.setPosition(cv.getPosition());
+			d.mTexCoord = cv.mTexCoord;
+			d.setNormal(cv.getNormal());
+			d.mIndex = index;
+			if (point_iter != point_map.end())
+			{
+				point_iter->second.push_back(d);
+			}
+			else
+			{
+				point_map[LLVector3(d.getPosition().getF32ptr())].push_back(d);
+			}
+		}
+
+		if (indices.size()%3 == 0 && verts.size() >= 65532)
+		{
+			face_list.push_back(face);
+			face_list.rbegin()->fillFromLegacyData(verts, indices);
+			face = LLVolumeFace();
+			point_map.clear();
+		}
+
+	}
+
+	if (!verts.empty())
+	{
+		std::string material;
+
+		if (tri->getMaterial())
+		{
+			material = std::string(tri->getMaterial());
+		}
+		
+		materials.push_back(material);
+		face_list.push_back(face);
+
+		face_list.rbegin()->fillFromLegacyData(verts, indices);
+	}
+
+}
+
+void load_face_from_dom_polylist(std::vector<LLVolumeFace>& face_list, std::vector<std::string>& materials, domPolylistRef& poly)
+{
+	domPRef p = poly->getP();
+	domListOfUInts& idx = p->getValue();
+
+	if (idx.getCount() == 0)
+	{
+		return;
+	}
+
+	const domInputLocalOffset_Array& inputs = poly->getInput_array();
+
+
+	domListOfUInts& vcount = poly->getVcount()->getValue();
+	
+	S32 pos_offset = -1;
+	S32 tc_offset = -1;
+	S32 norm_offset = -1;
+
+	domSource* pos_source = NULL;
+	domSource* tc_source = NULL;
+	domSource* norm_source = NULL;
+
+	S32 idx_stride = 0;
+
+	get_dom_sources(inputs, pos_offset, tc_offset, norm_offset, idx_stride, pos_source, tc_source, norm_source);
+
+	LLVolumeFace face;
+
+	std::vector<U16> indices;
+	std::vector<LLVolumeFace::VertexData> verts;
+
+	domListOfFloats v;
+	domListOfFloats tc;
+	domListOfFloats n;
+
+	if (pos_source)
+	{
+		v = pos_source->getFloat_array()->getValue();
+		face.mExtents[0].set(v[0], v[1], v[2]);
+		face.mExtents[1].set(v[0], v[1], v[2]);
+	}
+
+	if (tc_source)
+	{
+		tc = tc_source->getFloat_array()->getValue();
+	}
+
+	if (norm_source)
+	{
+		n = norm_source->getFloat_array()->getValue();
+	}
+	
+	LLVolumeFace::VertexMapData::PointMap point_map;
+
+	U32 cur_idx = 0;
+	for (U32 i = 0; i < vcount.getCount(); ++i)
+	{ //for each polygon
+		U32 first_index = 0;
+		U32 last_index = 0;
+		for (U32 j = 0; j < vcount[i]; ++j)
+		{ //for each vertex
+
+			LLVolumeFace::VertexData cv;
+
+			if (pos_source)
+			{
+				cv.getPosition().set(v[idx[cur_idx+pos_offset]*3+0],
+									v[idx[cur_idx+pos_offset]*3+1],
+									v[idx[cur_idx+pos_offset]*3+2]);
+			}
+
+			if (tc_source)
+			{
+				cv.mTexCoord.setVec(tc[idx[cur_idx+tc_offset]*2+0],
+									tc[idx[cur_idx+tc_offset]*2+1]);
+			}
+
+			if (norm_source)
+			{
+				cv.getNormal().set(n[idx[cur_idx+norm_offset]*3+0],
+									n[idx[cur_idx+norm_offset]*3+1],
+									n[idx[cur_idx+norm_offset]*3+2]);
+			}
+
+			cur_idx += idx_stride;
+			
+			BOOL found = FALSE;
+				
+			LLVolumeFace::VertexMapData::PointMap::iterator point_iter;
+			LLVector3 pos3(cv.getPosition().getF32ptr());
+			point_iter = point_map.find(pos3);
+			
+			if (point_iter != point_map.end())
+			{
+				for (U32 k = 0; k < point_iter->second.size(); ++k)
+				{
+					if ((point_iter->second)[k] == cv)
+					{
+						found = TRUE;
+						U32 index = (point_iter->second)[k].mIndex;
+						if (j == 0)
+						{
+							first_index = index;
+						}
+						else if (j == 1)
+						{
+							last_index = index;
+						}
+						else
+						{
+							indices.push_back(first_index);
+							indices.push_back(last_index);
+							indices.push_back(index);
+							last_index = index;
+						}
+
+						break;
+					}
+				}
+			}
+
+			if (!found)
+			{
+				update_min_max(face.mExtents[0], face.mExtents[1], cv.getPosition());
+				verts.push_back(cv);
+				if (verts.size() >= 65535)
+				{
+					llerrs << "Attempted to write model exceeding 16-bit index buffer limitation." << llendl;
+				}
+				U16 index = (U16) (verts.size()-1);
+			
+				if (j == 0)
+				{
+					first_index = index;
+				}
+				else if (j == 1)
+				{
+					last_index = index;
+				}
+				else
+				{
+					indices.push_back(first_index);
+					indices.push_back(last_index);
+					indices.push_back(index);
+					last_index = index;
+				}	
+
+				LLVolumeFace::VertexMapData d;
+				d.setPosition(cv.getPosition());
+				d.mTexCoord = cv.mTexCoord;
+				d.setNormal(cv.getNormal());
+				d.mIndex = index;
+				if (point_iter != point_map.end())
+				{
+					point_iter->second.push_back(d);
+				}
+				else
+				{
+					point_map[pos3].push_back(d);
+				}
+			}
+
+			if (indices.size()%3 == 0 && indices.size() >= 65532)
+			{
+				face_list.push_back(face);
+				face_list.rbegin()->fillFromLegacyData(verts, indices);
+				face = LLVolumeFace();
+				verts.clear();
+				indices.clear();
+				point_map.clear();
+			}
+		}
+	}
+
+	if (!verts.empty())
+	{
+		std::string material;
+
+		if (poly->getMaterial())
+		{
+			material = std::string(poly->getMaterial());
+		}
+		
+		materials.push_back(material);
+		face_list.push_back(face);
+		face_list.rbegin()->fillFromLegacyData(verts, indices);
+	}
+}
+
+void load_face_from_dom_polygons(std::vector<LLVolumeFace>& face_list, std::vector<std::string>& materials, domPolygonsRef& poly)
+{
+	LLVolumeFace face;
+	std::vector<U16> indices;
+	std::vector<LLVolumeFace::VertexData> verts;
+
+	const domInputLocalOffset_Array& inputs = poly->getInput_array();
+
+
+	S32 v_offset = -1;
+	S32 n_offset = -1;
+	S32 t_offset = -1;
+
+	domListOfFloats* v = NULL;
+	domListOfFloats* n = NULL;
+	domListOfFloats* t = NULL;
+	
+	U32 stride = 0;
+	for (U32 i = 0; i < inputs.getCount(); ++i)
+	{
+		stride = llmax((U32) inputs[i]->getOffset()+1, stride);
+
+		if (strcmp(COMMON_PROFILE_INPUT_VERTEX, inputs[i]->getSemantic()) == 0)
+		{ //found vertex array
+			v_offset = inputs[i]->getOffset();
+
+			const domURIFragmentType& uri = inputs[i]->getSource();
+			daeElementRef elem = uri.getElement();
+			domVertices* vertices = (domVertices*) elem.cast();
+
+			domInputLocal_Array& v_inp = vertices->getInput_array();
+
+			for (U32 k = 0; k < v_inp.getCount(); ++k)
+			{
+				if (strcmp(COMMON_PROFILE_INPUT_POSITION, v_inp[k]->getSemantic()) == 0)
+				{
+					const domURIFragmentType& uri = v_inp[k]->getSource();
+					daeElementRef elem = uri.getElement();
+					domSource* src = (domSource*) elem.cast();
+					v = &(src->getFloat_array()->getValue());
+				}
+			}
+		}
+		else if (strcmp(COMMON_PROFILE_INPUT_NORMAL, inputs[i]->getSemantic()) == 0)
+		{
+			n_offset = inputs[i]->getOffset();
+			//found normal array for this triangle list
+			const domURIFragmentType& uri = inputs[i]->getSource();
+			daeElementRef elem = uri.getElement();
+			domSource* src = (domSource*) elem.cast();
+			n = &(src->getFloat_array()->getValue());
+		}
+		else if (strcmp(COMMON_PROFILE_INPUT_TEXCOORD, inputs[i]->getSemantic()) == 0 && inputs[i]->getSet() == 0)
+		{ //found texCoords
+			t_offset = inputs[i]->getOffset();
+			const domURIFragmentType& uri = inputs[i]->getSource();
+			daeElementRef elem = uri.getElement();
+			domSource* src = (domSource*) elem.cast();
+			t = &(src->getFloat_array()->getValue());
+		}
+	}
+
+	domP_Array& ps = poly->getP_array();
+
+	//make a triangle list in <verts>
+	for (U32 i = 0; i < ps.getCount(); ++i)
+	{ //for each polygon
+		domListOfUInts& idx = ps[i]->getValue();
+		for (U32 j = 0; j < idx.getCount()/stride; ++j)
+		{ //for each vertex
+			if (j > 2)
+			{
+				U32 size = verts.size();
+				LLVolumeFace::VertexData v0 = verts[size-3];
+				LLVolumeFace::VertexData v1 = verts[size-1];
+
+				verts.push_back(v0);
+				verts.push_back(v1);
+			}
+
+			LLVolumeFace::VertexData vert;
+
+
+			if (v)
+			{
+				U32 v_idx = idx[j*stride+v_offset]*3;
+				vert.getPosition().set(v->get(v_idx),
+								v->get(v_idx+1),
+								v->get(v_idx+2));
+			}
+			
+			if (n)
+			{
+				U32 n_idx = idx[j*stride+n_offset]*3;
+				vert.getNormal().set(n->get(n_idx),
+								n->get(n_idx+1),
+								n->get(n_idx+2));
+			}
+
+			if (t)
+			{
+				U32 t_idx = idx[j*stride+t_offset]*2;
+				vert.mTexCoord.setVec(t->get(t_idx),
+								t->get(t_idx+1));								
+			}
+		
+			
+			verts.push_back(vert);
+		}
+	}
+
+	if (verts.empty())
+	{
+		return;
+	}
+
+	face.mExtents[0] = verts[0].getPosition();
+	face.mExtents[1] = verts[0].getPosition();
+	
+	//create a map of unique vertices to indices
+	std::map<LLVolumeFace::VertexData, U32> vert_idx;
+
+	U32 cur_idx = 0;
+	for (U32 i = 0; i < verts.size(); ++i)
+	{
+		std::map<LLVolumeFace::VertexData, U32>::iterator iter = vert_idx.find(verts[i]);
+		if (iter == vert_idx.end())
+		{
+			vert_idx[verts[i]] = cur_idx++;
+		}
+	}
+
+	if (cur_idx != vert_idx.size())
+	{
+		llerrs << "WTF?" << llendl;
+	}
+
+	//build vertex array from map
+	std::vector<LLVolumeFace::VertexData> new_verts;
+	new_verts.resize(vert_idx.size());
+
+	for (std::map<LLVolumeFace::VertexData, U32>::iterator iter = vert_idx.begin(); iter != vert_idx.end(); ++iter)
+	{
+		new_verts[iter->second] = iter->first;
+		update_min_max(face.mExtents[0], face.mExtents[1], iter->first.getPosition());
+	}
+
+	//build index array from map
+	indices.resize(verts.size());
+
+	for (U32 i = 0; i < verts.size(); ++i)
+	{
+		indices[i] = vert_idx[verts[i]];
+	}
+
+	// DEBUG just build an expanded triangle list
+	/*for (U32 i = 0; i < verts.size(); ++i)
+	{
+		indices.push_back((U16) i);
+		update_min_max(face.mExtents[0], face.mExtents[1], verts[i].getPosition());
+	}*/
+
+    if (!new_verts.empty())
+	{
+		std::string material;
+
+		if (poly->getMaterial())
+		{
+			material = std::string(poly->getMaterial());
+		}
+
+		materials.push_back(material);
+		face_list.push_back(face);
+		face_list.rbegin()->fillFromLegacyData(new_verts, indices);
+	}
+}
+
+void LLModel::addVolumeFacesFromDomMesh(domMesh* mesh)
+{
+	domTriangles_Array& tris = mesh->getTriangles_array();
+		
+	for (U32 i = 0; i < tris.getCount(); ++i)
+	{
+		domTrianglesRef& tri = tris.get(i);
+
+		load_face_from_dom_triangles(mVolumeFaces, mMaterialList, tri);
+	}
+
+	domPolylist_Array& polys = mesh->getPolylist_array();
+	for (U32 i = 0; i < polys.getCount(); ++i)
+	{
+		domPolylistRef& poly = polys.get(i);
+
+		load_face_from_dom_polylist(mVolumeFaces, mMaterialList, poly);
+	}
+
+	domPolygons_Array& polygons = mesh->getPolygons_array();
+	for (U32 i = 0; i < polygons.getCount(); ++i)
+	{
+		domPolygonsRef& poly = polygons.get(i);
+
+		load_face_from_dom_polygons(mVolumeFaces, mMaterialList, poly);
+	}
+
+}
+
+BOOL LLModel::createVolumeFacesFromDomMesh(domMesh* mesh)
+{
+	if (mesh)
+	{
+		mVolumeFaces.clear();
+		mMaterialList.clear();
+
+		addVolumeFacesFromDomMesh(mesh);
+
+		if (getNumVolumeFaces() > 0)
+		{
+			optimizeVolumeFaces();
+			normalizeVolumeFaces();
+
+			if (getNumVolumeFaces() > 0)
+			{
+				return TRUE;
+			}
+		}
+	}
+	else
+	{	
+		llwarns << "no mesh found" << llendl;
+	}
+	
+	return FALSE;
+}
+
+
+BOOL LLModel::createVolumeFacesFromFile(const std::string& file_name)
+{
+	DAE dae;
+	domCOLLADA* dom = dae.open(file_name);
+	if (dom)
+	{
+		daeDatabase* db = dae.getDatabase();
+
+		daeInt count = db->getElementCount(NULL, COLLADA_TYPE_MESH);
+		
+		mVolumeFaces.clear();
+		mMaterialList.clear();
+
+		for (daeInt idx = 0; idx < count; ++idx)
+		{
+			domMesh* mesh = NULL;
+
+			db->getElement((daeElement**) &mesh, idx, NULL, COLLADA_TYPE_MESH);
+			
+			if (mesh)
+			{
+				addVolumeFacesFromDomMesh(mesh);
+			}
+		}
+
+		if (getNumVolumeFaces() > 0)
+		{
+			optimizeVolumeFaces();
+			normalizeVolumeFaces();
+			return TRUE;
+		}
+	}
+
+	return FALSE;
+}
+
+
+void LLModel::optimizeVolumeFaces()
+{
+#if 0 //VECTORIZE ?
+	for (std::vector<LLVolumeFace>::iterator iter = mVolumeFaces.begin(); iter != mVolumeFaces.end(); )
+	{
+		std::vector<LLVolumeFace>::iterator cur_iter = iter++;
+		LLVolumeFace& face = *cur_iter;
+
+		for (S32 i = 0; i < (S32) face.mNumIndices; i += 3)
+		{ //remove zero area triangles
+			U16 i0 = face.mIndices[i+0];
+			U16 i1 = face.mIndices[i+1];
+			U16 i2 = face.mIndices[i+2];
+
+			if (i0 == i1 || 
+				i1 == i2 || 
+				i0 == i2)
+			{ //duplicate index in triangle, remove triangle
+				face.mIndices.erase(face.mIndices.begin()+i, face.mIndices.begin()+i+3);
+				i -= 3;
+			}
+			else
+			{ 
+				LLVolumeFace::VertexData& v0 = face.mVertices[i0];
+				LLVolumeFace::VertexData& v1 = face.mVertices[i1];
+				LLVolumeFace::VertexData& v2 = face.mVertices[i2];
+
+				if (v0.mPosition == v1.mPosition ||
+					v1.mPosition == v2.mPosition ||
+					v2.mPosition == v0.mPosition)
+				{ //zero area triangle, delete
+					face.mIndices.erase(face.mIndices.begin()+i, face.mIndices.begin()+i+3);
+					i-=3;
+				}
+			}
+		}
+
+		//remove unreference vertices
+		std::vector<bool> ref;
+		ref.resize(face.mNumVertices);
+
+		for (U32 i = 0; i < ref.size(); ++i)
+		{
+			ref[i] = false;
+		}
+
+		for (U32 i = 0; i < face.mNumIndices; ++i)
+		{ 
+			ref[face.mIndices[i]] = true;
+		}
+
+		U32 unref_count = 0;
+		for (U32 i = 0; i < ref.size(); ++i)
+		{
+			if (!ref[i])
+			{
+				//vertex is unreferenced
+				face.mVertices.erase(face.mVertices.begin()+(i-unref_count));
+				U16 idx = (U16) (i-unref_count);
+
+				for (U32 j = 0; j < face.mNumIndices; ++j)
+				{ //decrement every index array value greater than idx
+					if (face.mIndices[j] > idx)
+					{
+						--face.mIndices[j];
+					}
+				}
+				++unref_count;
+			}
+		}
+
+		if (face.mVertices.empty() || face.mIndices.empty())
+		{ //face is empty, remove it
+			iter = mVolumeFaces.erase(cur_iter);
+		}
+	}
+#endif
+}
+
+void LLModel::normalizeVolumeFaces()
+{
+
+	// ensure we don't have too many faces
+	if (mVolumeFaces.size() > LL_SCULPT_MESH_MAX_FACES)
+		mVolumeFaces.resize(LL_SCULPT_MESH_MAX_FACES);
+	
+	if (!mVolumeFaces.empty())
+	{
+		LLVector4a min, max;
+		
+		if (mVolumeFaces[0].mNumVertices <= 0)
+		{
+			llerrs << "WTF?" << llendl;
+		}
+
+		min = mVolumeFaces[0].mExtents[0];
+		max = mVolumeFaces[0].mExtents[1];
+
+		for (U32 i = 1; i < mVolumeFaces.size(); ++i)
+		{
+			LLVolumeFace& face = mVolumeFaces[i];
+
+			if (face.mNumVertices <= 0)
+			{
+				llerrs << "WTF?" << llendl;
+			}
+
+			update_min_max(min, max, face.mExtents[0]);
+			update_min_max(min, max, face.mExtents[1]);
+		}
+
+		LLVector4a trans;
+		trans.setAdd(min, max);
+		trans.mul(-0.5f);
+		LLVector4a size;
+		size.setSub(max, min);
+
+		F32 scale = 1.f/llmax(llmax(size[0], size[1]), size[2]);
+
+		for (U32 i = 0; i < mVolumeFaces.size(); ++i)
+		{
+			LLVolumeFace& face = mVolumeFaces[i];
+				
+			face.mExtents[0].add(trans);
+			face.mExtents[0].mul(scale);
+
+			face.mExtents[1].add(trans);
+			face.mExtents[1].mul(scale);
+
+			LLVector4a* pos = (LLVector4a*) face.mPositions;
+			for (U32 j = 0; j < face.mNumVertices; ++j)
+			{
+				pos[j].add(trans);
+				pos[j].mul(scale);
+			}
+		}
+
+		mNormalizedScale = LLVector3(1,1,1) / scale;
+		mNormalizedTranslation.set(trans.getF32ptr());
+		mNormalizedTranslation *= -1.f; 
+	}
+}
+
+void LLModel::getNormalizedScaleTranslation(LLVector3& scale_out, LLVector3& translation_out)
+{
+	scale_out = mNormalizedScale;
+	translation_out = mNormalizedTranslation;
+}
+
+void LLModel::setNumVolumeFaces(S32 count)
+{
+	mVolumeFaces.resize(count);
+}
+
+void LLModel::setVolumeFaceData(S32 f, 
+								LLStrider<LLVector3> pos, 
+								LLStrider<LLVector3> norm, 
+								LLStrider<LLVector2> tc, 
+								LLStrider<U16> ind, 
+								U32 num_verts, 
+								U32 num_indices)
+{
+	LLVolumeFace& face = mVolumeFaces[f];
+
+	face.resizeVertices(num_verts);
+	face.resizeIndices(num_indices);
+
+	LLVector4a::memcpyNonAliased16((F32*) face.mPositions, (F32*) pos.get(), num_verts*4*sizeof(F32));
+	LLVector4a::memcpyNonAliased16((F32*) face.mNormals, (F32*) norm.get(), num_verts*4*sizeof(F32));
+	LLVector4a::memcpyNonAliased16((F32*) face.mTexCoords, (F32*) tc.get(), num_verts*2*sizeof(F32));
+	U32 size = (num_indices*2+0xF)&~0xF;
+	LLVector4a::memcpyNonAliased16((F32*) face.mIndices, (F32*) ind.get(), size);
+}
+
+void LLModel::appendFaces(LLModel *model, LLMatrix4 &transform, LLMatrix4& norm_mat)
+{
+	if (mVolumeFaces.empty())
+	{
+		setNumVolumeFaces(1);
+	}
+
+	LLVolumeFace& face = mVolumeFaces[mVolumeFaces.size()-1];
+
+
+	for (S32 i = 0; i < model->getNumFaces(); ++i)
+	{
+		face.appendFace(model->getVolumeFace(i), transform, norm_mat);
+	}
+
+}
+
+void LLModel::appendFace(const LLVolumeFace& src_face, std::string src_material, LLMatrix4& mat, LLMatrix4& norm_mat)
+{
+	S32 rindex = getNumVolumeFaces()-1; 
+	if (rindex == -1 || 
+		mVolumeFaces[rindex].mNumVertices + src_face.mNumVertices >= 65536)
+	{ //empty or overflow will occur, append new face
+		LLVolumeFace cur_face;
+		cur_face.appendFace(src_face, mat, norm_mat);
+		addFace(cur_face);
+		mMaterialList.push_back(src_material);
+	}
+	else
+	{ //append to existing end face
+		mVolumeFaces.rbegin()->appendFace(src_face, mat, norm_mat);
+	}
+}
+
+void LLModel::addFace(const LLVolumeFace& face)
+{
+	if (face.mNumVertices == 0)
+	{
+		llerrs << "Cannot add empty face." << llendl;
+	}
+
+	mVolumeFaces.push_back(face);
+
+	if (mVolumeFaces.size() > MAX_MODEL_FACES)
+	{
+		llerrs << "Model prims cannot have more than " << MAX_MODEL_FACES << " faces!" << llendl;
+	}
+}
+
+
+void LLModel::smoothNormals(F32 angle_cutoff)
+{
+	//smooth normals for all faces by:
+	// 1 - Create faceted copy of face with no texture coordinates
+	// 2 - Weld vertices in faceted copy that are shared between triangles with less than "angle_cutoff" difference between normals
+	// 3 - Generate smoothed set of normals based on welding results
+	// 4 - Create faceted copy of face with texture coordinates
+	// 5 - Copy smoothed normals to faceted copy, using closest normal to triangle normal where more than one normal exists for a given position
+	// 6 - Remove redundant vertices from new faceted (now smooth) copy
+
+	angle_cutoff = cosf(angle_cutoff);
+	for (U32 j = 0; j < mVolumeFaces.size(); ++j)
+	{
+		LLVolumeFace& vol_face = mVolumeFaces[j];
+
+		if (vol_face.mNumIndices > 65535)
+		{
+			llwarns << "Too many vertices for normal generation to work." << llendl;
+			continue;
+		}
+
+		//create faceted copy of current face with no texture coordinates (step 1)
+		LLVolumeFace faceted;
+
+		LLVector4a* src_pos = (LLVector4a*) vol_face.mPositions;
+		//LLVector4a* src_norm = (LLVector4a*) vol_face.mNormals;
+
+
+		faceted.resizeVertices(vol_face.mNumIndices);
+		faceted.resizeIndices(vol_face.mNumIndices);
+		//bake out triangles into temporary face, clearing texture coordinates
+		for (U32 i = 0; i < vol_face.mNumIndices; ++i)
+		{
+			U32 idx = vol_face.mIndices[i];
+		
+			faceted.mPositions[i] = src_pos[idx];
+			faceted.mTexCoords[i] = LLVector2(0,0);
+			faceted.mIndices[i] = i;
+		}
+
+		//generate normals for temporary face
+		for (U32 i = 0; i < faceted.mNumIndices; i += 3)
+		{ //for each triangle
+			U16 i0 = faceted.mIndices[i+0];
+			U16 i1 = faceted.mIndices[i+1];
+			U16 i2 = faceted.mIndices[i+2];
+			
+			LLVector4a& p0 = faceted.mPositions[i0];
+			LLVector4a& p1 = faceted.mPositions[i1];
+			LLVector4a& p2 = faceted.mPositions[i2];
+
+			LLVector4a& n0 = faceted.mNormals[i0];
+			LLVector4a& n1 = faceted.mNormals[i1];
+			LLVector4a& n2 = faceted.mNormals[i2];
+
+			LLVector4a lhs, rhs;
+			lhs.setSub(p1, p0);
+			rhs.setSub(p2, p0);
+
+			n0.setCross3(lhs, rhs);
+			n0.normalize3();
+			n1 = n0;
+			n2 = n0;
+		}
+
+		//weld vertices in temporary face, respecting angle_cutoff (step 2)
+		faceted.optimize(angle_cutoff);
+
+		//generate normals for welded face based on new topology (step 3)
+
+		for (U32 i = 0; i < faceted.mNumVertices; i++)
+		{
+			faceted.mNormals[i].clear();
+		}
+
+		for (U32 i = 0; i < faceted.mNumIndices; i += 3)
+		{ //for each triangle
+			U16 i0 = faceted.mIndices[i+0];
+			U16 i1 = faceted.mIndices[i+1];
+			U16 i2 = faceted.mIndices[i+2];
+			
+			LLVector4a& p0 = faceted.mPositions[i0];
+			LLVector4a& p1 = faceted.mPositions[i1];
+			LLVector4a& p2 = faceted.mPositions[i2];
+
+			LLVector4a& n0 = faceted.mNormals[i0];
+			LLVector4a& n1 = faceted.mNormals[i1];
+			LLVector4a& n2 = faceted.mNormals[i2];
+
+			LLVector4a lhs, rhs;
+			lhs.setSub(p1, p0);
+			rhs.setSub(p2, p0);
+
+			LLVector4a n;
+			n.setCross3(lhs, rhs);
+
+			n0.add(n);
+			n1.add(n);
+			n2.add(n);
+		}
+
+		//normalize normals and build point map
+		LLVolumeFace::VertexMapData::PointMap point_map;
+
+		for (U32 i = 0; i < faceted.mNumVertices; ++i)
+		{
+			faceted.mNormals[i].normalize3();
+
+			LLVolumeFace::VertexMapData v;
+			v.setPosition(faceted.mPositions[i]);
+			v.setNormal(faceted.mNormals[i]);
+
+			point_map[LLVector3(v.getPosition().getF32ptr())].push_back(v);
+		}
+
+		//create faceted copy of current face with texture coordinates (step 4)
+		LLVolumeFace new_face;
+
+		//bake out triangles into new face
+		new_face.resizeIndices(vol_face.mNumIndices);
+		new_face.resizeVertices(vol_face.mNumIndices);
+		
+		for (U32 i = 0; i < vol_face.mNumIndices; ++i)
+		{
+			U32 idx = vol_face.mIndices[i];
+			LLVolumeFace::VertexData v;
+			new_face.mPositions[i] = vol_face.mPositions[idx];
+			new_face.mNormals[i].clear();
+			new_face.mTexCoords[i] = vol_face.mTexCoords[idx];
+			new_face.mIndices[i] = i;
+		}
+
+		//generate normals for new face
+		for (U32 i = 0; i < new_face.mNumIndices; i += 3)
+		{ //for each triangle
+			U16 i0 = new_face.mIndices[i+0];
+			U16 i1 = new_face.mIndices[i+1];
+			U16 i2 = new_face.mIndices[i+2];
+			
+			LLVector4a& p0 = new_face.mPositions[i0];
+			LLVector4a& p1 = new_face.mPositions[i1];
+			LLVector4a& p2 = new_face.mPositions[i2];
+
+			LLVector4a& n0 = new_face.mNormals[i0];
+			LLVector4a& n1 = new_face.mNormals[i1];
+			LLVector4a& n2 = new_face.mNormals[i2];
+
+			LLVector4a lhs, rhs;
+			lhs.setSub(p1, p0);
+			rhs.setSub(p2, p0);
+
+			n0.setCross3(lhs, rhs);
+			n0.normalize3();
+			n1 = n0;
+			n2 = n0;
+		}
+
+		//swap out normals in new_face with best match from point map (step 5)
+		for (U32 i = 0; i < new_face.mNumVertices; ++i)
+		{
+			//LLVolumeFace::VertexData v = new_face.mVertices[i];
+
+			LLVector4a ref_norm = new_face.mNormals[i];
+
+			LLVolumeFace::VertexMapData::PointMap::iterator iter = point_map.find(LLVector3(new_face.mPositions[i].getF32ptr()));
+
+			if (iter != point_map.end())
+			{
+				F32 best = -2.f;
+				for (U32 k = 0; k < iter->second.size(); ++k)
+				{
+					LLVector4a& n = iter->second[k].getNormal();
+
+					if (!iter->second[k].getPosition().equals3(new_face.mPositions[i]))
+					{
+						llerrs << "WTF?" << llendl;
+					}
+
+					F32 cur = n.dot3(ref_norm).getF32();
+
+					if (cur > best)
+					{
+						best = cur;
+						new_face.mNormals[i] = n;
+					}
+				}
+			}
+		}
+		
+		//remove redundant vertices from new face (step 6)
+		new_face.optimize();
+
+		mVolumeFaces[j] = new_face;
+	}
+}
+
+//static
+std::string LLModel::getElementLabel(daeElement *element)
+{ // try to get a decent label for this element
+	// if we have a name attribute, use it
+	std::string name = element->getAttribute("name");
+	if (name.length())
+	{
+		return name;
+	}
+
+	// if we have an ID attribute, use it
+	if (element->getID())
+	{
+		return std::string(element->getID());
+	}
+
+	// if we have a parent, use it
+	daeElement* parent = element->getParent();
+	if (parent)
+	{
+		// if parent has a name, use it
+		std::string name = parent->getAttribute("name");
+		if (name.length())
+		{
+			return name;
+		}
+
+		// if parent has an ID, use it
+		if (parent->getID())
+		{
+			return std::string(parent->getID());
+		}
+	}
+
+	// try to use our type
+	daeString element_name = element->getElementName();
+	if (element_name)
+	{
+		return std::string(element_name);
+	}
+
+	// if all else fails, use "object"
+	return std::string("object");
+}
+
+//static 
+LLModel* LLModel::loadModelFromDae(std::string filename)
+{
+	LLVolumeParams volume_params;
+	volume_params.setType(LL_PCODE_PROFILE_SQUARE, LL_PCODE_PATH_LINE);
+	LLModel* ret = new LLModel(volume_params, 0.f); 
+	ret->createVolumeFacesFromFile(filename);
+	return ret;
+}
+
+//static 
+LLModel* LLModel::loadModelFromDomMesh(domMesh *mesh)
+{
+	LLVolumeParams volume_params;
+	volume_params.setType(LL_PCODE_PROFILE_SQUARE, LL_PCODE_PATH_LINE);
+	LLModel* ret = new LLModel(volume_params, 0.f); 
+	ret->createVolumeFacesFromDomMesh(mesh);
+	ret->mLabel = getElementLabel(mesh);
+	return ret;
+}
+
+//static 
+LLSD LLModel::writeModel(std::string filename, LLModel* physics, LLModel* high, LLModel* medium, LLModel* low, LLModel* impostor, LLModel::physics_shape& decomp, BOOL nowrite)
+{
+	std::ofstream os(filename.c_str(), std::ofstream::out | std::ofstream::binary);
+
+	LLSD header = writeModel(os, physics, high, medium, low, impostor, decomp, nowrite);
+
+	os.close();
+
+	return header;
+}
+
+//static
+LLSD LLModel::writeModel(std::ostream& ostr, LLModel* physics, LLModel* high, LLModel* medium, LLModel* low, LLModel* impostor, LLModel::physics_shape& decomp, BOOL nowrite)
+{
+	LLSD mdl;
+
+	LLModel* model[] = 
+	{
+		impostor,
+		low,
+		medium,
+		high,
+		physics
+	};
+
+	bool skinning = high && !high->mSkinWeights.empty();
+
+	if (skinning)
+	{ //write skinning block
+		if (high->mJointList.size() != high->mInvBindMatrix.size())
+		{
+			llerrs << "WTF?" << llendl;
+		}
+
+		for (U32 i = 0; i < high->mJointList.size(); ++i)
+		{
+			mdl["skin"]["joint_names"][i] = high->mJointList[i];
+
+			for (U32 j = 0; j < 4; j++)
+			{
+				for (U32 k = 0; k < 4; k++)
+				{
+					mdl["skin"]["inverse_bind_matrix"][i][j*4+k] = high->mInvBindMatrix[i].mMatrix[j][k]; 
+				}
+			}
+		}
+
+		for (U32 i = 0; i < 4; i++)
+		{
+			for (U32 j = 0; j < 4; j++)
+			{
+				mdl["skin"]["bind_shape_matrix"][i*4+j] = high->mBindShapeMatrix.mMatrix[i][j];
+			}
+		}
+		
+		if ( high->mAlternateBindMatrix.size() > 0 )
+		{
+			for (U32 i = 0; i < high->mJointList.size(); ++i)
+			{
+				for (U32 j = 0; j < 4; j++)
+				{
+					for (U32 k = 0; k < 4; k++)
+					{
+						mdl["skin"]["alt_inverse_bind_matrix"][i][j*4+k] = high->mAlternateBindMatrix[i].mMatrix[j][k]; 
+					}
+				}
+			}
+		}
+		
+	}
+
+	if (!decomp.empty())
+	{
+		//write decomposition block
+		// ["decomposition"]["HullList"] -- list of 8 bit integers, each entry represents a hull with specified number of points
+		// ["decomposition"]["PositionDomain"]["Min"/"Max"]
+		// ["decomposition"]["Position"] -- list of 16-bit integers to be decoded to given domain, encoded 3D points
+	
+		//get minimum and maximum
+		LLVector3 min = decomp[0][0];
+		LLVector3 max = min;
+
+		LLSD::Binary hulls(decomp.size());
+
+		U32 total = 0;
+
+		for (U32 i = 0; i < decomp.size(); ++i)
+		{
+			U32 size = decomp[i].size();
+			total += size;
+			hulls[i] = (U8) size;
+
+			for (U32 j = 0; j < decomp[i].size(); ++j)
+			{
+				update_min_max(min, max, decomp[i][j]);
+			}
+		}
+
+		mdl["decomposition"]["Min"] = min.getValue();
+		mdl["decomposition"]["Max"] = max.getValue();
+		mdl["decomposition"]["HullList"] = hulls;
+		
+		LLSD::Binary p(total*3*2);
+
+		LLVector3 range = max-min;
+
+		U32 vert_idx = 0;
+		for (U32 i = 0; i < decomp.size(); ++i)
+		{
+			for (U32 j = 0; j < decomp[i].size(); ++j)
+			{
+				for (U32 k = 0; k < 3; k++)
+				{
+					//convert to 16-bit normalized across domain
+					U16 val = (U16) (((decomp[i][j].mV[k]-min.mV[k])/range.mV[k])*65535);
+
+					U8* buff = (U8*) &val;
+					//write to binary buffer
+					p[vert_idx++] = buff[0];
+					p[vert_idx++] = buff[1];
+
+					if (vert_idx > p.size())
+					{
+						llerrs << "WTF?" << llendl;
+					}
+				}
+			}
+		}
+
+		mdl["decomposition"]["Position"] = p;
+	}
+
+	for (U32 idx = 0; idx < MODEL_NAMES_LENGTH; ++idx)
+	{
+		if (model[idx] && model[idx]->getNumVolumeFaces() > 0)
+		{
+			LLVector3 min_pos = LLVector3(model[idx]->getVolumeFace(0).mPositions[0].getF32ptr());
+			LLVector3 max_pos = min_pos;
+
+			//find position domain
+			for (S32 i = 0; i < model[idx]->getNumVolumeFaces(); ++i)
+			{ //for each face
+				const LLVolumeFace& face = model[idx]->getVolumeFace(i);
+				for (U32 j = 0; j < face.mNumVertices; ++j)
+				{
+					update_min_max(min_pos, max_pos, face.mPositions[j].getF32ptr());
+				}
+			}
+
+			LLVector3 pos_range = max_pos - min_pos;
+
+			for (S32 i = 0; i < model[idx]->getNumVolumeFaces(); ++i)
+			{ //for each face
+				const LLVolumeFace& face = model[idx]->getVolumeFace(i);
+				if (!face.mNumVertices)
+				{ //don't export an empty face
+					continue;
+				}
+				LLSD::Binary verts(face.mNumVertices*3*2);
+				LLSD::Binary tc(face.mNumVertices*2*2);
+				LLSD::Binary normals(face.mNumVertices*3*2);
+				LLSD::Binary indices(face.mNumIndices*2);
+
+				U32 vert_idx = 0;
+				U32 norm_idx = 0;
+				U32 tc_idx = 0;
+			
+				LLVector2* ftc = (LLVector2*) face.mTexCoords;
+				LLVector2 min_tc = ftc[0];
+				LLVector2 max_tc = min_tc;
+	
+				//get texture coordinate domain
+				for (U32 j = 0; j < face.mNumVertices; ++j)
+				{
+					update_min_max(min_tc, max_tc, ftc[j]);
+				}
+
+				LLVector2 tc_range = max_tc - min_tc;
+
+				for (U32 j = 0; j < face.mNumVertices; ++j)
+				{ //for each vert
+		
+					F32* pos = face.mPositions[j].getF32ptr();
+					F32* norm = face.mNormals[j].getF32ptr();
+
+					//position + normal
+					for (U32 k = 0; k < 3; ++k)
+					{ //for each component
+
+						//convert to 16-bit normalized across domain
+						U16 val = (U16) (((pos[k]-min_pos.mV[k])/pos_range.mV[k])*65535);
+
+						U8* buff = (U8*) &val;
+						//write to binary buffer
+						verts[vert_idx++] = buff[0];
+						verts[vert_idx++] = buff[1];
+						
+						//convert to 16-bit normalized
+						val = (U16) ((norm[k]+1.f)*0.5f*65535);
+
+						//write to binary buffer
+						normals[norm_idx++] = buff[0];
+						normals[norm_idx++] = buff[1];
+					}
+
+					F32* src_tc = (F32*) face.mTexCoords[j].mV;
+
+					//texcoord
+					for (U32 k = 0; k < 2; ++k)
+					{ //for each component
+						//convert to 16-bit normalized
+						U16 val = (U16) ((src_tc[k]-min_tc.mV[k])/tc_range.mV[k]*65535);
+
+						U8* buff = (U8*) &val;
+						//write to binary buffer
+						tc[tc_idx++] = buff[0];
+						tc[tc_idx++] = buff[1];
+					}
+					
+				}
+
+				U32 idx_idx = 0;
+				for (U32 j = 0; j < face.mNumIndices; ++j)
+				{
+					U8* buff = (U8*) &(face.mIndices[j]);
+					indices[idx_idx++] = buff[0];
+					indices[idx_idx++] = buff[1];
+				}
+
+				//write out face data
+				mdl[model_names[idx]][i]["PositionDomain"]["Min"] = min_pos.getValue();
+				mdl[model_names[idx]][i]["PositionDomain"]["Max"] = max_pos.getValue();
+
+				mdl[model_names[idx]][i]["TexCoord0Domain"]["Min"] = min_tc.getValue();
+				mdl[model_names[idx]][i]["TexCoord0Domain"]["Max"] = max_tc.getValue();
+
+				mdl[model_names[idx]][i]["Position"] = verts;
+				mdl[model_names[idx]][i]["Normal"] = normals;
+				mdl[model_names[idx]][i]["TexCoord0"] = tc;
+				mdl[model_names[idx]][i]["TriangleList"] = indices;
+
+				if (skinning)
+				{
+					//write out skin weights
+
+					//each influence list entry is up to 4 24-bit values
+					// first 8 bits is bone index
+					// last 16 bits is bone influence weight
+					// a bone index of 0xFF signifies no more influences for this vertex
+
+					std::stringstream ostr;
+
+					for (U32 j = 0; j < face.mNumVertices; ++j)
+					{
+						LLVector3 pos(face.mPositions[j].getF32ptr());
+
+						weight_list& weights = high->getJointInfluences(pos);
+
+						if (weights.size() > 4)
+						{
+							llerrs << "WTF?" << llendl;
+						}
+
+						S32 count = 0;
+						for (weight_list::iterator iter = weights.begin(); iter != weights.end(); ++iter)
+						{
+							if (iter->mJointIdx < 255 && iter->mJointIdx >= 0)
+							{
+								U8 idx = (U8) iter->mJointIdx;
+								ostr.write((const char*) &idx, 1);
+
+								U16 influence = (U16) (iter->mWeight*65535);
+								ostr.write((const char*) &influence, 2);
+
+								++count;
+							}		
+						}
+						U8 end_list = 0xFF;
+						if (count < 4)
+						{
+							ostr.write((const char*) &end_list, 1);
+						}
+					}
+
+					//copy ostr to binary buffer
+					std::string data = ostr.str();
+					const U8* buff = (U8*) data.data();
+					U32 bytes = data.size();
+
+					LLSD::Binary w(bytes);
+					for (U32 j = 0; j < bytes; ++j)
+					{
+						w[j] = buff[j];
+					}
+
+					mdl[model_names[idx]][i]["Weights"] = w;
+				}
+			}
+		}
+	}
+	
+	return writeModelToStream(ostr, mdl, nowrite);
+}
+
+LLSD LLModel::writeModelToStream(std::ostream& ostr, LLSD& mdl, BOOL nowrite)
+{
+	U32 bytes = 0;
+	
+	std::string::size_type cur_offset = 0;
+
+	LLSD header;
+
+	std::string skin;
+
+	if (mdl.has("skin"))
+	{ //write out skin block
+		skin = zip_llsd(mdl["skin"]);
+
+		U32 size = skin.size();
+		if (size > 0)
+		{
+			header["skin"]["offset"] = (LLSD::Integer) cur_offset;
+			header["skin"]["size"] = (LLSD::Integer) size;
+			cur_offset += size;
+			bytes += size;
+		}
+		else
+		{
+			llerrs << "WTF?" << llendl;
+		}
+	}
+
+	std::string decomposition;
+
+	if (mdl.has("decomposition"))
+	{ //write out convex decomposition
+		decomposition = zip_llsd(mdl["decomposition"]);
+
+		U32 size = decomposition.size();
+		if (size > 0)
+		{
+			header["decomposition"]["offset"] = (LLSD::Integer) cur_offset;
+			header["decomposition"]["size"] = (LLSD::Integer) size;
+			cur_offset += size;
+			bytes += size;
+		}
+	}
+
+	std::string out[MODEL_NAMES_LENGTH];
+
+	for (S32 i = 0; i < MODEL_NAMES_LENGTH; i++)
+	{
+		if (mdl.has(model_names[i]))
+		{
+			out[i] = zip_llsd(mdl[model_names[i]]);
+
+			U32 size = out[i].size();
+
+			header[model_names[i]]["offset"] = (LLSD::Integer) cur_offset;
+			header[model_names[i]]["size"] = (LLSD::Integer) size;
+			cur_offset += size;
+			bytes += size;
+		}
+		else
+		{
+			header[model_names[i]]["offset"] = -1;
+			header[model_names[i]]["size"] = 0;
+		}
+	}
+
+	if (!nowrite)
+	{
+		LLSDSerialize::serialize(header, ostr, LLSDSerialize::LLSD_BINARY);
+
+		if (!skin.empty())
+		{ //write skin block
+			ostr.write((const char*) skin.data(), header["skin"]["size"].asInteger());
+		}
+
+		if (!decomposition.empty())
+		{ //write decomposition block
+			ostr.write((const char*) decomposition.data(), header["decomposition"]["size"].asInteger());
+		}
+
+		for (S32 i = 0; i < MODEL_NAMES_LENGTH; i++)
+		{
+			if (!out[i].empty())
+			{
+				ostr.write((const char*) out[i].data(), header[model_names[i]]["size"].asInteger());
+			}
+		}
+	}
+	
+	return header;
+}
+
+//static 
+LLModel* LLModel::loadModelFromAsset(std::string filename, S32 lod)
+{
+	return NULL;
+}
+
+LLModel::weight_list& LLModel::getJointInfluences(const LLVector3& pos)
+{
+	weight_map::iterator iter = mSkinWeights.find(pos);
+	
+	if (iter != mSkinWeights.end())
+	{
+		if ((iter->first - pos).magVec() > 0.1f)
+		{
+			llerrs << "WTF?" << llendl;
+		}
+
+		return iter->second;
+	}
+	else
+	{  //no exact match found, get closest point
+		iter = mSkinWeights.begin();
+		weight_map::iterator best = iter;
+
+		F32 min_dist = (iter->first - pos).magVecSquared();
+
+		while (++iter != mSkinWeights.end())
+		{
+			F32 dist = (iter->first - pos).magVecSquared();
+			if (dist < min_dist)
+			{
+				best = iter;
+				min_dist = dist;
+			}
+		}
+
+		return best->second;
+	}					
+}
+
+