Hi Robert, Sorry I didn't answer sooner. I tried a tiny change in is83() function and had no crash (under Windows). "osgconv cow.osg cow.3ds" exports a black cow and "osgconv lz.osg lz.3ds" exports tree(s) at (0,0,0)... I guess there are still things to do about non-zero-index textures and multiple instanciation of a node, but at least it doesn't crash.
Attached is my file at rev. 11083. Cheers, Sukender PVLE - Lightweight cross-platform game engine - http://pvle.sourceforge.net/ ----- "Robert Osfield" <[email protected]> a écrit : > Hi Sukender, > > I've now reviewed and merged your changes to keep the ball rolling. > > There are still problems with writing out scene graphs though. > > osgconv cow.osg cow.3ds > > and > > osgconv lz.osg lz.3ds > > both hang, the both hangs at around: > > > #0 0x00007f0619676750 in std::string::find_first_of () from > /usr/lib/libstdc++.so.6 > #1 0x00007f061772d4c4 in is83 () from > /home/robert/OpenSceneGraph/lib/osgPlugins-2.9.7/osgdb_3ds.so > #2 0x00007f061772d95a in is3DSpath () from > /home/robert/OpenSceneGraph/lib/osgPlugins-2.9.7/osgdb_3ds.so > #3 0x00007f0617733162 in WriterNodeVisitor::writeMaterials () from > /home/robert/OpenSceneGraph/lib/osgPlugins-2.9.7/osgdb_3ds.so > #4 0x00007f0617726503 in ReaderWriter3DS::createFileObject () from > /home/robert/OpenSceneGraph/lib/osgPlugins-2.9.7/osgdb_3ds.so > #5 0x00007f061772670b in ReaderWriter3DS::doWriteNode () from > /home/robert/OpenSceneGraph/lib/osgPlugins-2.9.7/osgdb_3ds.so > #6 0x00007f0617725e08 in ReaderWriter3DS::writeNode () from > /home/robert/OpenSceneGraph/lib/osgPlugins-2.9.7/osgdb_3ds.so > #7 0x00007f061bac4c2a in osgDB::Registry::writeNodeImplementation () > from /home/robert/OpenSceneGraph/lib/libosgDB.so.63 > > > For further work on the 3ds plugin could you do an svn update and use > this as the base as I've merged other fixes to the plugin that I > don't > want to loose. > > Cheers, > Robert. > _______________________________________________ > osg-submissions mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscenegraph.org
// -*-c++-*- /* * 3DS reader/writer for Open Scene Graph * * Copyright (C) ??? * * Writing support added 2007 by Sukender (Benoit Neil), http://sukender.free.fr, * strongly inspired by the OBJ writer object by Stephan Huber * * The Open Scene Graph (OSG) is a cross platform C++/OpenGL library for * real-time rendering of large 3D photo-realistic models. * The OSG homepage is http://www.openscenegraph.org/ */ #include <osg/io_utils> #include <osg/CullFace> #include <osgDB/WriteFile> #include "WriterNodeVisitor.h" #include <cassert> void copyOsgMatrixToLib3dsMatrix(Lib3dsMatrix lib3ds_matrix, const osg::Matrix& osg_matrix) { for(int row=0; row<4; ++row) { lib3ds_matrix[row][0] = osg_matrix.ptr()[row*4+0]; lib3ds_matrix[row][1] = osg_matrix.ptr()[row*4+1]; lib3ds_matrix[row][2] = osg_matrix.ptr()[row*4+2]; lib3ds_matrix[row][3] = osg_matrix.ptr()[row*4+3]; } } inline void copyOsgVectorToLib3dsVector(Lib3dsVector lib3ds_vector, const osg::Vec3f& osg_vector) { lib3ds_vector[0] = osg_vector[0]; lib3ds_vector[1] = osg_vector[1]; lib3ds_vector[2] = osg_vector[2]; } inline void copyOsgVectorToLib3dsVector(Lib3dsVector lib3ds_vector, const osg::Vec3d& osg_vector) { lib3ds_vector[0] = osg_vector[0]; lib3ds_vector[1] = osg_vector[1]; lib3ds_vector[2] = osg_vector[2]; } inline void copyOsgColorToLib3dsColor(Lib3dsVector lib3ds_vector, const osg::Vec4f& osg_vector) { lib3ds_vector[0] = osg_vector[0]; lib3ds_vector[1] = osg_vector[1]; lib3ds_vector[2] = osg_vector[2]; } inline void copyOsgColorToLib3dsColor(Lib3dsVector lib3ds_vector, const osg::Vec4d& osg_vector) { lib3ds_vector[0] = osg_vector[0]; lib3ds_vector[1] = osg_vector[1]; lib3ds_vector[2] = osg_vector[2]; } inline void copyOsgQuatToLib3dsQuat(float lib3ds_vector[4], const osg::Quat& osg_quat) { //lib3ds_vector[0] = osg_quat[3]; // Not sure //lib3ds_vector[1] = osg_quat[0]; //lib3ds_vector[2] = osg_quat[1]; //lib3ds_vector[3] = osg_quat[2]; // 3DS seems to store (angle in radians, axis_x, axis_y, axis_z), but it works with (axis_x, axis_y, axis_z, -angle in radians)! osg::Quat::value_type angle, x, y, z; osg_quat.getRotate(angle, x, y, z); lib3ds_vector[0] = static_cast<float>(x); lib3ds_vector[1] = static_cast<float>(y); lib3ds_vector[2] = static_cast<float>(z); lib3ds_vector[3] = static_cast<float>(-angle); } std::string getFileName(const std::string & path) { unsigned int slashPos = path.find_last_of("/\\"); if (slashPos == std::string::npos) return path; return path.substr(slashPos+1); } /// Checks if a filename (\b not path) is 8.3 (an empty name is never 8.3, and a path is never 8.3). bool is83(const std::string & s) { // 012345678901 // ABCDEFGH.ABC if (s.find_first_of("/\\") != std::string::npos) return false; // It should not be a path, but a filename unsigned int len = s.length(); if (len > 12 || len == 0) return false; unsigned int pointPos = s.rfind('.'); if (pointPos == std::string::npos) return len <= 8; // Without point // With point if (pointPos > 8) return false; if (len-1 - pointPos > 3) return false; return true; } /// Tests if the given string is a path supported by 3DS format (8.3, 63 chars max). bool is3DSpath(const std::string & s, bool extendedFilePaths) { unsigned int len = s.length(); if (len >= 64 || len == 0) return false; if (extendedFilePaths) return true; // Extended paths are simply those that fits the 64 bytes buffer! // For each subdirectory unsigned int tokenLen; for (unsigned int tokenBegin=0, tokenEnd=0; tokenEnd == std::string::npos; tokenBegin = tokenEnd+1) { tokenEnd = s.find_first_of("/\\", tokenBegin); if (tokenEnd != std::string::npos) tokenLen = tokenEnd-tokenBegin-1; // -1 to avoid reading the separator else tokenLen = len-tokenBegin; if ( tokenLen>0 && !is83(s.substr(tokenBegin, tokenLen)) ) return false; } return true; } /** writes all primitives of a primitive-set out to a stream, decomposes quads to triangles, line-strips to lines etc */ class PrimitiveIndexWriter : public osg::PrimitiveIndexFunctor { public: PrimitiveIndexWriter(osg::Geometry * geo, ListTriangle & listTriangles, unsigned int drawable_n, unsigned int material) : osg::PrimitiveIndexFunctor(), _drawable_n(drawable_n), _listTriangles(listTriangles), _hasNormalCoords(geo->getNormalArray() != NULL), _hasTexCoords(geo->getTexCoordArray(0) != NULL), _geo(geo), _lastFaceIndex(0), _material(material) { } unsigned int getNextFaceIndex() { return _lastFaceIndex; } virtual void setVertexArray(unsigned int,const osg::Vec2*) {} virtual void setVertexArray(unsigned int count,const osg::Vec3* vecs) {} virtual void setVertexArray(unsigned int,const osg::Vec4* ) {} virtual void setVertexArray(unsigned int,const osg::Vec2d*) {} virtual void setVertexArray(unsigned int ,const osg::Vec3d* ) {} virtual void setVertexArray(unsigned int,const osg::Vec4d* ) {} // operator for triangles void writeTriangle(unsigned int i1, unsigned int i2, unsigned int i3) { Triangle triangle; triangle.t1 = i1; triangle.t2 = i2; triangle.t3 = i3; triangle.material = _material; _listTriangles.push_back(std::pair<Triangle, unsigned int>(triangle, _drawable_n)); } virtual void begin(GLenum mode) { _modeCache = mode; _indexCache.clear(); } virtual void vertex(unsigned int vert) { _indexCache.push_back(vert); } virtual void end() { if (!_indexCache.empty()) { drawElements(_modeCache,_indexCache.size(),&_indexCache.front()); } } virtual void drawArrays(GLenum mode,GLint first,GLsizei count); virtual void drawElements(GLenum mode,GLsizei count,const GLubyte* indices) { drawElementsImplementation<GLubyte>(mode, count, indices); } virtual void drawElements(GLenum mode,GLsizei count,const GLushort* indices) { drawElementsImplementation<GLushort>(mode, count, indices); } virtual void drawElements(GLenum mode,GLsizei count,const GLuint* indices) { drawElementsImplementation<GLuint>(mode, count, indices); } protected: template<typename T>void drawElementsImplementation(GLenum mode, GLsizei count, const T* indices) { if (indices==0 || count==0) return; typedef const T* IndexPointer; switch(mode) { case(GL_TRIANGLES): { //lib3ds_mesh_resize_faces(_mesh, _lastFaceIndex + count / 3); IndexPointer ilast = &indices[count]; for(IndexPointer iptr=indices;iptr<ilast;iptr+=3) writeTriangle(*iptr,*(iptr+1),*(iptr+2)); break; } case(GL_TRIANGLE_STRIP): { //lib3ds_mesh_resize_faces(_mesh, _lastFaceIndex + count -2); IndexPointer iptr = indices; for(GLsizei i=2;i<count;++i,++iptr) { if ((i%2)) writeTriangle(*(iptr),*(iptr+2),*(iptr+1)); else writeTriangle(*(iptr),*(iptr+1),*(iptr+2)); } break; } case(GL_QUADS): { //lib3ds_mesh_resize_faces(_mesh, _lastFaceIndex + count /2); // count/4*2 IndexPointer iptr = indices; for(GLsizei i=3;i<count;i+=4,iptr+=4) { writeTriangle(*(iptr),*(iptr+1),*(iptr+2)); writeTriangle(*(iptr),*(iptr+2),*(iptr+3)); } break; } case(GL_QUAD_STRIP): { //lib3ds_mesh_resize_faces(_mesh, _lastFaceIndex + (count / 2 -1)*2); IndexPointer iptr = indices; for(GLsizei i=3;i<count;i+=2,iptr+=2) { writeTriangle(*(iptr),*(iptr+1),*(iptr+2)); writeTriangle(*(iptr+1),*(iptr+3),*(iptr+2)); } break; } case(GL_POLYGON): // treat polygons as GL_TRIANGLE_FAN case(GL_TRIANGLE_FAN): { //lib3ds_mesh_resize_faces(_mesh, _lastFaceIndex + count -2); IndexPointer iptr = indices; unsigned int first = *iptr; ++iptr; for(GLsizei i=2;i<count;++i,++iptr) { writeTriangle(first,*(iptr),*(iptr+1)); } break; } case(GL_POINTS): case(GL_LINES): case(GL_LINE_STRIP): case(GL_LINE_LOOP): // Not handled break; default: // uhm should never come to this point :) break; } } private: PrimitiveIndexWriter& operator = (const PrimitiveIndexWriter&) { return *this; } unsigned int _drawable_n; ListTriangle & _listTriangles; GLenum _modeCache; std::vector<GLuint> _indexCache; bool _hasNormalCoords, _hasTexCoords; osg::Geometry* _geo; unsigned int _lastFaceIndex; unsigned int _material; }; void PrimitiveIndexWriter::drawArrays(GLenum mode,GLint first,GLsizei count) { switch(mode) { case(GL_TRIANGLES): { unsigned int pos=first; for(GLsizei i=2;i<count;i+=3,pos+=3) { writeTriangle(pos,pos+1,pos+2); } break; } case(GL_TRIANGLE_STRIP): { unsigned int pos=first; for(GLsizei i=2;i<count;++i,++pos) { if ((i%2)) writeTriangle(pos,pos+2,pos+1); else writeTriangle(pos,pos+1,pos+2); } break; } case(GL_QUADS): { unsigned int pos=first; for(GLsizei i=3;i<count;i+=4,pos+=4) { writeTriangle(pos,pos+1,pos+2); writeTriangle(pos,pos+2,pos+3); } break; } case(GL_QUAD_STRIP): { unsigned int pos=first; for(GLsizei i=3;i<count;i+=2,pos+=2) { writeTriangle(pos,pos+1,pos+2); writeTriangle(pos+1,pos+3,pos+2); } break; } case(GL_POLYGON): // treat polygons as GL_TRIANGLE_FAN case(GL_TRIANGLE_FAN): { unsigned int pos=first+1; for(GLsizei i=2;i<count;++i,++pos) { writeTriangle(first,pos,pos+1); } break; } case(GL_POINTS): case(GL_LINES): case(GL_LINE_STRIP): case(GL_LINE_LOOP): //break; default: osg::notify(osg::WARN) << "3DS WriterNodeVisitor: can't handle mode " << mode << std::endl; break; } } WriterNodeVisitor::Material::Material(WriterNodeVisitor & writerNodeVisitor, osg::StateSet * stateset, osg::Material* mat, osg::Texture* tex, int index) : index(index), diffuse(1,1,1,1), ambient(0.2,0.2,0.2,1), specular(0,0,0,1), shininess(0), transparency(0), double_sided(false), image(NULL), texture_transparency(false), texture_no_tile(false) { //static unsigned int s_objmaterial_id = 0; //++s_objmaterial_id; if (mat) { assert(stateset); diffuse = mat->getDiffuse(osg::Material::FRONT); ambient = mat->getAmbient(osg::Material::FRONT); specular = mat->getSpecular(osg::Material::FRONT); shininess = mat->getShininess(osg::Material::FRONT); transparency = 1-diffuse.w(); name = writerNodeVisitor.getUniqueName(mat->getName(),"mat"); osg::StateAttribute * attribute = stateset->getAttribute(osg::StateAttribute::CULLFACE); if (!attribute) { double_sided = true; } else { assert(dynamic_cast<osg::CullFace *>(attribute)); osg::CullFace::Mode mode = static_cast<osg::CullFace *>(attribute)->getMode(); if (mode == osg::CullFace::BACK) double_sided = false; else if (mode == osg::CullFace::FRONT) { osg::notify(osg::WARN) << "3DS Writer: Reversed face (culled FRONT) not supported yet." << std::endl; double_sided = false; } else { assert(mode == osg::CullFace::FRONT_AND_BACK); osg::notify(osg::WARN) << "3DS Writer: Invisible face (culled FRONT_AND_BACK) not supported yet." << std::endl; double_sided = false; } } } if (tex) { osg::Image* img = tex->getImage(0); if(img) { texture_transparency = (stateset->getMode(GL_BLEND) == osg::StateAttribute::ON); texture_no_tile = (tex->getWrap(osg::Texture2D::WRAP_S) == osg::Texture2D::CLAMP); image = img; } } if (name.empty()) { std::stringstream ss; ss << "m" << index; name = ss.str(); } } // If 'to' is in a subdirectory of 'from' then this function returns the // subpath. Otherwise it just returns the file name. // (Same as in FBX plugin) std::string getPathRelative(const std::string& from/*directory*/, const std::string& to/*file path*/) { std::string::size_type slash = to.find_last_of('/'); std::string::size_type backslash = to.find_last_of('\\'); if (slash == std::string::npos) { if (backslash == std::string::npos) return to; slash = backslash; } else if (backslash != std::string::npos && backslash > slash) { slash = backslash; } if (from.empty() || from.length() > to.length()) return osgDB::getSimpleFileName(to); std::string::const_iterator itTo = to.begin(); for (std::string::const_iterator itFrom = from.begin(); itFrom != from.end(); ++itFrom, ++itTo) { char a = tolower(*itFrom), b = tolower(*itTo); if (a == '\\') a = '/'; if (b == '\\') b = '/'; if (a != b || itTo == to.begin() + slash + 1) { return osgDB::getSimpleFileName(to); } } while (itTo != to.end() && (*itTo == '\\' || *itTo == '/')) { ++itTo; } return std::string(itTo, to.end()); } /// Converts an extension to a 3-letters long one equivalent. std::string convertExt(const std::string & path, bool extendedFilePaths) { if (extendedFilePaths) return path; // Extensions are not truncated for extended filenames std::string ext = osgDB::getFileExtensionIncludingDot(path); if (ext == ".tiff") ext = ".tif"; else if (ext == ".jpeg") ext = ".jpg"; else if (ext == ".jpeg2000" || ext == ".jpg2000") ext = ".jpc"; return osgDB::getNameLessExtension(path) + ext; } WriterNodeVisitor::WriterNodeVisitor(Lib3dsFile * file3ds, const std::string & fileName, const osgDB::ReaderWriter::Options* options, const std::string & srcDirectory) : osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN), _suceedLastApply(true), _srcDirectory(srcDirectory), file3ds(file3ds), _currentStateSet(new osg::StateSet()), _lastMaterialIndex(0), _lastMeshIndex(0), _cur3dsNode(NULL), options(options), _imageCount(0), _extendedFilePaths(false) { if (!fileName.empty()) _directory = options->getDatabasePathList().empty() ? osgDB::getFilePath(fileName) : options->getDatabasePathList().front(); if (options) { std::istringstream iss(options->getOptionString()); std::string opt; while (iss >> opt) { if (opt == "extended3dsFilePaths" || opt == "extended3DSFilePaths") _extendedFilePaths = true; } } } void WriterNodeVisitor::writeMaterials() { unsigned int nbMat = _materialMap.size(); lib3ds_file_reserve_materials(file3ds, nbMat, 1); // Ugly thing: it seems lib3ds_file_insert_material() doesn't support insertion in a random order (else materials are not assigned the right way) for (unsigned int iMat=0; iMat<nbMat; ++iMat) { bool found = false; for(MaterialMap::iterator itr = _materialMap.begin(); itr != _materialMap.end(); ++itr) { const Material & mat = itr->second; if (mat.index != static_cast<int>(iMat)) continue; // Ugly thing (2) found = true; assert(mat.index>=0 && mat.index < static_cast<int>(_materialMap.size())); Lib3dsMaterial * mat3ds = lib3ds_material_new(getFileName(mat.name).c_str()); copyOsgColorToLib3dsColor(mat3ds->ambient, mat.ambient); copyOsgColorToLib3dsColor(mat3ds->diffuse, mat.diffuse); copyOsgColorToLib3dsColor(mat3ds->specular, mat.specular); mat3ds->shininess = mat.shininess; mat3ds->transparency = mat.transparency; mat3ds->two_sided = mat.double_sided ? 1 : 0; if (mat.image) { Lib3dsTextureMap & tex = mat3ds->texture1_map; std::string path; if(mat.image->getFileName().empty()) { std::ostringstream oss; oss << "Image_" << _imageCount++ << ".rgb"; path = oss.str(); } else { path = getPathRelative(_srcDirectory, mat.image->getFileName()); } path = convertExt(path, _extendedFilePaths); if(!is3DSpath(path, _extendedFilePaths)) { path = getUniqueName(path, "", true); //path = osgDB::getSimpleFileName(path); } strcpy(tex.name, path.c_str()); path = osgDB::concatPaths(_directory, path); osgDB::makeDirectoryForFile(path); //if (mat.image->valid()) osgDB::writeImageFile(*(mat.image), path); if(_imageSet.find(mat.image.get()) == _imageSet.end()) { _imageSet.insert(mat.image.get()); osgDB::writeImageFile(*(mat.image), path); } if (mat.texture_transparency) tex.flags |= LIB3DS_TEXTURE_ALPHA_SOURCE; if (mat.texture_no_tile) tex.flags |= LIB3DS_TEXTURE_NO_TILE; } if (!suceedLastApply()) return; lib3ds_file_insert_material(file3ds, mat3ds, itr->second.index); break; // Ugly thing (3) } if (!found) throw "Implementation error"; // Ugly thing (4) } } std::string WriterNodeVisitor::getUniqueName(const std::string& _defaultValue, const std::string & _defaultPrefix, bool nameIsPath) { static const unsigned int MAX_PREFIX_LEGNTH = 4; if (_defaultPrefix.length()>MAX_PREFIX_LEGNTH) throw "Default prefix is too long"; // Arbitrarily defined to 4 chars. // Tests if default name is valid and unique bool defaultIs83 = is83(_defaultValue); bool defaultIsValid = nameIsPath ? is3DSpath(_defaultValue, _extendedFilePaths) : defaultIs83; if (defaultIsValid && _nameMap.find(_defaultValue) == _nameMap.end()) { _nameMap.insert(_defaultValue); return _defaultValue; } // Handling of paths is not well done yet. Defaulting to something very simple. // We should actually ensure each component is 8 chars long, and final filename is 8.3, and total is <64 chars, or simply ensure total length for extended 3DS paths. std::string defaultValue(nameIsPath ? osgDB::getSimpleFileName(_defaultValue) : _defaultValue); std::string ext(nameIsPath ? osgDB::getFileExtensionIncludingDot(_defaultValue).substr(0, std::min<unsigned int>(_defaultValue.size(), 4)) : ""); // 4 chars = dot + 3 chars if (ext == ".") ext = ""; std::string defaultPrefix(_defaultPrefix.empty() ? "_" : _defaultPrefix); unsigned int max_val = 0; std::string truncDefaultValue = ""; for (unsigned int i = 0; i < std::min<unsigned int>(defaultValue.size(), MAX_PREFIX_LEGNTH); ++i) { if (defaultValue[i] == '.') { truncDefaultValue = defaultValue.substr(0, i); break; } } if (truncDefaultValue.empty()) truncDefaultValue = defaultValue.substr(0, std::min<unsigned int>(defaultValue.size(), MAX_PREFIX_LEGNTH)); assert(truncDefaultValue.size() <= MAX_PREFIX_LEGNTH); std::map<std::string, unsigned int>::iterator pairPrefix; // TODO - Handle the case of extended 3DS paths and allow more than 8 chars defaultIs83 = is83(truncDefaultValue); if (defaultIs83) { max_val = static_cast<unsigned int>(pow(10., 8. - truncDefaultValue.length())) -1; pairPrefix = _mapPrefix.find(truncDefaultValue); } if (defaultIs83 && (pairPrefix == _mapPrefix.end() || pairPrefix->second <= max_val)) { defaultPrefix = truncDefaultValue; } else { max_val = static_cast<unsigned int>(pow(10., 8. - defaultPrefix.length())) -1; pairPrefix = _mapPrefix.find(defaultPrefix); } unsigned int searchStart = 0; if (pairPrefix != _mapPrefix.end()) { searchStart = pairPrefix->second; } for(unsigned int i = searchStart; i <= max_val; ++i) { std::stringstream ss; ss << defaultPrefix << i; const std::string & res = ss.str(); if (_nameMap.find(res) == _nameMap.end()) { if (pairPrefix != _mapPrefix.end()) { pairPrefix->second = i + 1; } else { _mapPrefix.insert(std::pair<std::string, unsigned int>(defaultPrefix, i + 1)); } _nameMap.insert(res); return res + ext; } } // Failed finding a name // Try with a shorter prefix if possible if (defaultPrefix.length()>1) return getUniqueName(_defaultValue, defaultPrefix.substr(0, defaultPrefix.length()-1), nameIsPath); // Try with default prefix if not arleady done if (defaultPrefix != std::string("_")) return getUniqueName(_defaultValue, "_", nameIsPath); throw "No more names available! Is default prefix too long?"; } int WriterNodeVisitor::processStateSet(osg::StateSet* ss) { MaterialMap::const_iterator itr = _materialMap.find(ss); if (itr != _materialMap.end()) { assert(itr->second.index>=0); return itr->second.index; } osg::Material* mat = dynamic_cast<osg::Material*>(ss->getAttribute(osg::StateAttribute::MATERIAL)); osg::Texture* tex = dynamic_cast<osg::Texture*>(ss->getTextureAttribute(0, osg::StateAttribute::TEXTURE)); if (mat || tex) { int matNum = _lastMaterialIndex; _materialMap.insert(std::make_pair(osg::ref_ptr<osg::StateSet>(ss), Material(*this, ss, mat, tex, matNum) )); ++_lastMaterialIndex; return matNum; } return -1; } /** * Add a vertice to the index and link him with the Triangle index and the drawable. * \param index_vert is the map where the vertice are stored. * \param index is the indice of the vertice's position in the vec3. * \param drawable_n is the number of the drawable. * \return the position of the vertice in the final mesh. */ unsigned int WriterNodeVisitor::getMeshIndexForGeometryIndex(MapIndices & index_vert, unsigned int index, unsigned int drawable_n) { MapIndices::iterator itIndex = index_vert.find(std::pair<unsigned int, unsigned int>(index, drawable_n)); if (itIndex == index_vert.end()) { unsigned int indexMesh = index_vert.size(); index_vert.insert(std::make_pair(std::pair<unsigned int, unsigned int>(index, drawable_n), indexMesh)); return indexMesh; } return itIndex->second; } void WriterNodeVisitor::buildMesh(osg::Geode & geo, MapIndices & index_vert, bool texcoords, Lib3dsMesh * mesh) { osg::notify(osg::DEBUG_INFO) << "Building Mesh" << std::endl; if (!mesh) throw "Allocation error"; // TODO lib3ds_mesh_resize_vertices(mesh, index_vert.size(), texcoords ? 1 : 0, 0); // Write points for(MapIndices::iterator it = index_vert.begin(); it != index_vert.end();++it) { osg::Geometry *g = geo.getDrawable( it->first.second )->asGeometry(); assert(g->getVertexArray()); if (g->getVertexArray()->getType() != osg::Array::Vec3ArrayType) throw "Vertex array is not Vec3. Not implemented"; // TODO const osg::Vec3Array & vecs= *static_cast<osg::Vec3Array *>(g->getVertexArray()); copyOsgVectorToLib3dsVector(mesh->vertices[it->second], vecs[it->first.first]); } // Write texture coords (Texture 0 only) if (texcoords) { for(MapIndices::iterator it = index_vert.begin(); it != index_vert.end(); ++it) { osg::Geometry *g = geo.getDrawable( it->first.second )->asGeometry(); osg::Array * array = g->getTexCoordArray(0); if(array) { if (g->getTexCoordArray(0)->getType() != osg::Array::Vec2ArrayType) throw "Texture coords array is not Vec2. Not implemented"; // TODO const osg::Vec2Array & vecs= *static_cast<osg::Vec2Array *>(array); mesh->texcos[it->second][0] = vecs[it->first.first][0]; mesh->texcos[it->second][1] = vecs[it->first.first][1]; } } } lib3ds_file_insert_mesh(file3ds, mesh, _lastMeshIndex); ++_lastMeshIndex; Lib3dsMeshInstanceNode * node3ds = lib3ds_node_new_mesh_instance(mesh, mesh->name, NULL, NULL, NULL); lib3ds_file_append_node(file3ds, reinterpret_cast<Lib3dsNode*>(node3ds), reinterpret_cast<Lib3dsNode*>(_cur3dsNode)); } unsigned int WriterNodeVisitor::calcVertices(osg::Geode & geo) { unsigned int numVertice = 0; for (unsigned int i = 0; i < geo.getNumDrawables(); ++i) { osg::Geometry *g = geo.getDrawable( i )->asGeometry(); assert(g->getVertexArray()); if (g->getVertexArray()->getType() != osg::Array::Vec3ArrayType) throw "Vertex array is not Vec3. Not implemented"; // TODO const osg::Vec3Array & vecs= *static_cast<osg::Vec3Array *>(g->getVertexArray()); numVertice += vecs.getNumElements(); } return numVertice; } void WriterNodeVisitor::buildFaces(osg::Geode & geo, ListTriangle & listTriangles, bool texcoords) { MapIndices index_vert; unsigned int nbFace = 0; Lib3dsMesh *mesh = lib3ds_mesh_new( getUniqueName(geo.getName().empty() ? geo.className() : geo.getName(), "geo").c_str() ); unsigned int nbTriangles = listTriangles.size(); lib3ds_mesh_resize_faces(mesh, nbTriangles); unsigned int nbVertices = calcVertices(geo); if (listTriangles.size() >= MAX_FACES-2 || ((nbVertices) >= MAX_VERTICES-2)) { osg::notify(osg::INFO) << "Sorting elements..." << std::endl; WriterCompareTriangle cmp(geo, nbVertices); std::sort(listTriangles.begin(), listTriangles.end(), cmp); } for (ListTriangle::iterator it = listTriangles.begin(); it != listTriangles.end(); ++it) //Go through the triangle list to define meshs { // Using -2 due to the fact that we treat 3 faces in one time (=the algorithm may overrun the limit by 2). if ((index_vert.size() >= MAX_VERTICES-2 || // If mesh is full nbFace >= MAX_FACES-2)) { // Finnishing mesh lib3ds_mesh_resize_faces(mesh, nbFace); buildMesh(geo, index_vert, texcoords, mesh); // Creating a new mesh index_vert.clear(); mesh = lib3ds_mesh_new( getUniqueName(geo.getName().empty() ? geo.className() : geo.getName(), "geo").c_str()); nbTriangles -= nbFace; nbFace = 0; lib3ds_mesh_resize_faces(mesh, nbTriangles); } Lib3dsFace & face = mesh->faces[nbFace++]; face.index[0] = getMeshIndexForGeometryIndex(index_vert, it->first.t1, it->second); face.index[1] = getMeshIndexForGeometryIndex(index_vert, it->first.t2, it->second); face.index[2] = getMeshIndexForGeometryIndex(index_vert, it->first.t3, it->second); face.material = it->first.material; } buildMesh(geo, index_vert, texcoords, mesh); //When a Mesh is completed without restriction of vertices number } void WriterNodeVisitor::createListTriangle(osg::Geometry * geo, ListTriangle & listTriangles, bool & texcoords, unsigned int & drawable_n) { unsigned int nbVertices = 0; { if (geo->getVertexArray() && geo->getVertexArray()->getType() != osg::Array::Vec3ArrayType) throw "Vertex array is not Vec3. Not implemented"; // TODO const osg::Vec3Array * vecs = geo->getVertexArray() ? static_cast<osg::Vec3Array *>(geo->getVertexArray()) : NULL; if (vecs) { nbVertices = geo->getVertexArray()->getNumElements(); // Texture coords if (geo->getTexCoordArray(0) && geo->getTexCoordArray(0)->getType() != osg::Array::Vec2ArrayType) throw "Texture coords array is not Vec2. Not implemented"; // TODO const osg::Vec2Array * texvecs = geo->getTexCoordArray(0) ? static_cast<osg::Vec2Array *>(geo->getTexCoordArray(0)) : NULL; if (texvecs) { unsigned int nb = geo->getTexCoordArray(0)->getNumElements(); if (nb != geo->getVertexArray()->getNumElements()) throw "There are more/less texture coords than vertices!"; texcoords = true; } } } if (nbVertices==0) return; int material = processStateSet(_currentStateSet.get()); for(unsigned int i = 0; i < geo->getNumPrimitiveSets(); ++i) //Fill the Triangle List { osg::PrimitiveSet* ps = geo->getPrimitiveSet(i); PrimitiveIndexWriter pif(geo, listTriangles, drawable_n, material); ps->accept(pif); } } bool WriterNodeVisitor::suceedLastApply() const { return _suceedLastApply; } void WriterNodeVisitor::failedApply() { _suceedLastApply = false; osg::notify(osg::NOTICE) << "Error going through node" << std::endl; } void WriterNodeVisitor::apply( osg::Geode &node ) { pushStateSet(node.getStateSet()); //_nameStack.push_back(node.getName()); //osg::Matrix m = osg::computeLocalToWorld(getNodePath()); unsigned int count = node.getNumDrawables(); ListTriangle listTriangles; bool texcoords = false; for ( unsigned int i = 0; i < count; i++ ) { osg::Geometry *g = node.getDrawable( i )->asGeometry(); if ( g != NULL ) { pushStateSet(g->getStateSet()); createListTriangle(g, listTriangles, texcoords, i); popStateSet(g->getStateSet()); } } if (count > 0) { buildFaces(node, listTriangles, texcoords); } popStateSet(node.getStateSet()); //_nameStack.pop_back(); if (suceedLastApply()) traverse(node); } void WriterNodeVisitor::apply(osg::Group &node) { Lib3dsMeshInstanceNode * parent = _cur3dsNode; Lib3dsMeshInstanceNode * node3ds = lib3ds_node_new_mesh_instance(NULL, getUniqueName(node.getName().empty() ? node.className() : getFileName(node.getName()), "grp").c_str(), NULL, NULL, NULL); lib3ds_file_append_node(file3ds, reinterpret_cast<Lib3dsNode*>(node3ds), reinterpret_cast<Lib3dsNode*>(parent)); _cur3dsNode = node3ds; if (suceedLastApply()) traverse(node); _cur3dsNode = parent; } void WriterNodeVisitor::apply(osg::MatrixTransform &node) { Lib3dsMeshInstanceNode * parent = _cur3dsNode; const osg::Matrix & m = node.getMatrix(); //const osg::Matrix m( osg::computeWorldToLocal(getNodePath()) ); // [NEEDS TESTING!] 3DS matrices always contain world to local transformation (not local transform; ie. from parent) // Transform data used to be given to lib3ds_node_new_mesh_instance(), but it seems buggy (pivot problem? bug in conversion?). float pos[3]; float scl[3]; float rot[4]; osg::Vec3 osgScl, osgPos; osg::Quat osgRot, osgSo; m.decompose(osgPos, osgRot, osgScl, osgSo); copyOsgVectorToLib3dsVector(pos, osgPos); copyOsgVectorToLib3dsVector(scl, osgScl); copyOsgQuatToLib3dsQuat(rot, osgRot); Lib3dsMeshInstanceNode * node3ds = lib3ds_node_new_mesh_instance (NULL, getUniqueName(node.getName().empty() ? node.className() : node.getName(), "mtx").c_str(), pos, scl, rot); //// Create a mesh instance with no transform and then copy the matrix (doesn't work) //Lib3dsMeshInstanceNode * node3ds = lib3ds_node_new_mesh_instance // (NULL, getUniqueName(node.getName().empty() ? node.className() : node.getName(), "mtx").c_str(), NULL, NULL, NULL); // copyOsgMatrixToLib3dsMatrix(node3ds->base.matrix, m); lib3ds_file_append_node(file3ds, reinterpret_cast<Lib3dsNode*>(node3ds), reinterpret_cast<Lib3dsNode*>(parent)); _cur3dsNode = node3ds; if (suceedLastApply()) traverse(node); _cur3dsNode = parent; }
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