/** * @file llmodel.cpp * @brief Model handling implementation * * $LicenseInfo:firstyear=2001&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2010, Linden Research, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; * version 2.1 of the License only. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ */ #include "linden_common.h" #include "llmodel.h" #include "llconvexdecomposition.h" #include "llsdserialize.h" #include "llvector4a.h" #include "dae.h" #include "dae/daeErrorHandler.h" #include "dom/domConstants.h" #include "dom/domMesh.h" #ifdef LL_STANDALONE # include #else # include "zlib/zlib.h" #endif 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) { mDecompID = -1; } LLModel::~LLModel() { if (mDecompID >= 0) { // LLConvexDecomposition::getInstance()->deleteDecomposition(mDecompID); } } 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& face_list, std::vector& materials, domTrianglesRef& tri) { LLVolumeFace face; std::vector verts; std::vector 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& face_list, std::vector& 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 indices; std::vector 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& face_list, std::vector& materials, domPolygonsRef& poly) { LLVolumeFace face; std::vector indices; std::vector 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 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 vert_idx; U32 cur_idx = 0; for (U32 i = 0; i < verts.size(); ++i) { std::map::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 new_verts; new_verts.resize(vert_idx.size()); for (std::map::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::iterator iter = mVolumeFaces.begin(); iter != mVolumeFaces.end(); ) { std::vector::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 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 } // Shrink the model to fit // on a 1x1x1 cube centered at the origin. // The positions and extents // multiplied by mNormalizedScale // and offset by mNormalizedTranslation // to be the "original" extents and position. // Also, the positions will fit // within the unit cube. 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; } // For all of the volume faces // in the model, loop over // them and see what the extents // of the volume along each axis. 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]); } // Now that we have the extents of the model // we can compute the offset needed to center // the model at the origin. // Compute center of the model // and make it negative to get translation // needed to center at origin. LLVector4a trans; trans.setAdd(min, max); trans.mul(-0.5f); // Compute the total size along all // axes of the model. LLVector4a size; size.setSub(max, min); // Prevent division by zero. F32 x = size[0]; F32 y = size[1]; F32 z = size[2]; F32 w = size[3]; if (fabs(x) pos, LLStrider norm, LLStrider tc, LLStrider 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::generateNormals(F32 angle_cutoff) { //generate 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; } std::string LLModel::getName() const { if (!mRequestedLabel.empty()) return mRequestedLabel; else return mLabel; } //static LLSD LLModel::writeModel( std::string filename, LLModel* physics, LLModel* high, LLModel* medium, LLModel* low, LLModel* impostor, const convex_hull_decomposition& decomp, BOOL upload_skin, BOOL upload_joints, BOOL nowrite) { LLModel::hull dummy_hull; return writeModel( filename, physics, high, medium, low, impostor, decomp, dummy_hull, upload_skin, upload_joints, nowrite); } //static LLSD LLModel::writeModel( std::string filename, LLModel* physics, LLModel* high, LLModel* medium, LLModel* low, LLModel* impostor, const convex_hull_decomposition& decomp, const hull& base_hull, BOOL upload_skin, BOOL upload_joints, BOOL nowrite) { std::ofstream os( filename.c_str(), std::ofstream::out | std::ofstream::binary); LLSD header = writeModel( os, physics, high, medium, low, impostor, decomp, base_hull, upload_skin, upload_joints, nowrite); os.close(); return header; } //static LLSD LLModel::writeModel( std::ostream& ostr, LLModel* physics, LLModel* high, LLModel* medium, LLModel* low, LLModel* impostor, const convex_hull_decomposition& decomp, const hull& base_hull, BOOL upload_skin, BOOL upload_joints, BOOL nowrite) { LLSD mdl; LLModel* model[] = { impostor, low, medium, high, physics }; bool skinning = upload_skin && 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 ( upload_joints && 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() || !base_hull.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 // ["decomposition"]["Hull"] -- list of 16-bit integers to be decoded to given domain, encoded 3D points representing a single hull approximation of given shape //get minimum and maximum LLVector3 min; if (decomp.empty()) { min = base_hull[0]; } else { 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]); } } for (U32 i = 0; i < base_hull.size(); ++i) { update_min_max(min, max, base_hull[i]); } mdl["decomposition"]["Min"] = min.getValue(); mdl["decomposition"]["Max"] = max.getValue(); if (!hulls.empty()) { mdl["decomposition"]["HullList"] = hulls; } if (total > 0) { 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; } if (!base_hull.empty()) { LLSD::Binary p(base_hull.size()*3*2); LLVector3 range = max-min; U32 vert_idx = 0; for (U32 j = 0; j < base_hull.size(); ++j) { for (U32 k = 0; k < 3; k++) { //convert to 16-bit normalized across domain U16 val = (U16) (((base_hull[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"]["Hull"] = 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::toBinary(header, ostr); 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 const F32 epsilon = 2.f/65536; weight_map::iterator iter_up = mSkinWeights.lower_bound(pos); weight_map::iterator iter_down = ++iter_up; weight_map::iterator best = iter_up; F32 min_dist = (iter->first - pos).magVecSquared(); bool done = false; while (!done) { //search up and down mSkinWeights from lower bound of pos until a //match is found within epsilon. If no match is found within epsilon, //return closest match done = true; if (iter_up != mSkinWeights.end() && ++iter_up != mSkinWeights.end()) { done = false; F32 dist = (iter_up->first - pos).magVecSquared(); if (dist < epsilon) { return iter_up->second; } if (dist < min_dist) { best = iter_up; min_dist = dist; } } if (iter_down != mSkinWeights.begin() && --iter_down != mSkinWeights.begin()) { done = false; F32 dist = (iter_down->first - pos).magVecSquared(); if (dist < epsilon) { return iter_down->second; } if (dist < min_dist) { best = iter_down; min_dist = dist; } } } return best->second; } } void LLModel::setConvexHullDecomposition( const LLModel::convex_hull_decomposition& decomp) { mConvexHullDecomp = decomp; mHullCenter.resize(mConvexHullDecomp.size()); mHullPoints = 0; mCenterOfHullCenters.clear(); for (U32 i = 0; i < decomp.size(); ++i) { LLVector3 cur_center; for (U32 j = 0; j < decomp[i].size(); ++j) { cur_center += decomp[i][j]; } mCenterOfHullCenters += cur_center; cur_center *= 1.f/decomp[i].size(); mHullCenter[i] = cur_center; mHullPoints += decomp[i].size(); } mCenterOfHullCenters *= 1.f / mHullPoints; }