Hi, it seems a copy-paste error is present on the OBJ loader when parsing the options given by the user. "noTesselateLargePolygons" is being activated instead of "noTriStripPolygons". I'm attaching the fixed file.
Regards, Alberto
// -*-c++-*- /* * Wavefront OBJ loader for Open Scene Graph * * Copyright (C) 2001,2007 Ulrich Hertlein <[EMAIL PROTECTED]> * * Modified by Robert Osfield to support per Drawable coord, normal and * texture coord arrays, bug fixes, and support for texture mapping. * * Writing support added 2007 by Stephan Huber, http://digitalmind.de, * some ideas taken from the dae-plugin * * 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/ */ #if defined(_MSC_VER) #pragma warning( disable : 4786 ) #endif #include <string> #include <osg/Notify> #include <osg/Node> #include <osg/MatrixTransform> #include <osg/Geode> #include <osg/Geometry> #include <osg/StateSet> #include <osg/Material> #include <osg/Texture2D> #include <osg/TexGen> #include <osg/TexMat> #include <osgDB/Registry> #include <osgDB/ReadFile> #include <osgDB/FileUtils> #include <osgDB/FileNameUtils> #include <osgUtil/TriStripVisitor> #include <osgUtil/SmoothingVisitor> #include <osgUtil/Tessellator> #include "obj.h" #include "OBJWriterNodeVisitor.h" #include <map> #include <set> class ReaderWriterOBJ : public osgDB::ReaderWriter { public: ReaderWriterOBJ():_fixBlackMaterials(true) { supportsExtension("obj","Alias Wavefront OBJ format"); supportsOption("noRotation","Do not do the default rotate about X axis"); supportsOption("noTesselateLargePolygons","Do not do the default tesselation of large polygons"); supportsOption("noTriStripPolygons","Do not do the default tri stripping of polygons"); } virtual const char* className() const { return "Wavefront OBJ Reader"; } virtual ReadResult readNode(const std::string& fileName, const osgDB::ReaderWriter::Options* options) const; virtual ReadResult readNode(std::istream& fin, const Options* options) const; virtual WriteResult writeObject(const osg::Object& obj,const std::string& fileName,const Options* options=NULL) const { const osg::Node* node = dynamic_cast<const osg::Node*>(&obj); if (node) return writeNode(*node, fileName, options); else return WriteResult(WriteResult::FILE_NOT_HANDLED); } virtual WriteResult writeNode(const osg::Node& node,const std::string& fileName,const Options* options =NULL) const { if (!acceptsExtension(osgDB::getFileExtension(fileName))) return WriteResult(WriteResult::FILE_NOT_HANDLED); std::ofstream f(fileName.c_str()); std::string materialFile = osgDB::getNameLessExtension(fileName) + ".mtl"; OBJWriterNodeVisitor nv(f, osgDB::getSimpleFileName(materialFile)); // we must cast away constness (const_cast<osg::Node*>(&node))->accept(nv); std::ofstream mf(materialFile.c_str()); nv.writeMaterials(mf); return WriteResult(WriteResult::FILE_SAVED); } virtual WriteResult writeObject(const osg::Object& obj,std::ostream& fout,const Options* options=NULL) const { const osg::Node* node = dynamic_cast<const osg::Node*>(&obj); if (node) return writeNode(*node, fout, options); else return WriteResult(WriteResult::FILE_NOT_HANDLED); } virtual WriteResult writeNode(const osg::Node& node,std::ostream& fout,const Options* =NULL) const { // writing to a stream does not support materials OBJWriterNodeVisitor nv(fout); // we must cast away constness (const_cast<osg::Node*>(&node))->accept(nv); return WriteResult(WriteResult::FILE_SAVED); } protected: typedef std::map< std::string, osg::ref_ptr<osg::StateSet> > MaterialToStateSetMap; void buildMaterialToStateSetMap(obj::Model& model, MaterialToStateSetMap& materialToSetSetMap) const; osg::Geometry* convertElementListToGeometry(obj::Model& model, obj::Model::ElementList& elementList, bool& rotate) const; osg::Node* convertModelToSceneGraph(obj::Model& model, bool& rotate, bool& noTesselateLargePolygons, bool& noTriStripPolygons) const; inline osg::Vec3 transformVertex(const osg::Vec3& vec, const bool rotate) const ; inline osg::Vec3 transformNormal(const osg::Vec3& vec, const bool rotate) const ; bool _fixBlackMaterials; }; inline osg::Vec3 ReaderWriterOBJ::transformVertex(const osg::Vec3& vec, const bool rotate) const { if(rotate==true) { return osg::Vec3(vec.x(),-vec.z(),vec.y()); } else { return vec; } } inline osg::Vec3 ReaderWriterOBJ::transformNormal(const osg::Vec3& vec, const bool rotate) const { if(rotate==true) { return osg::Vec3(vec.x(),-vec.z(),vec.y()); } else { return vec; } } // register with Registry to instantiate the above reader/writer. REGISTER_OSGPLUGIN(obj, ReaderWriterOBJ) static void load_material_texture( obj::Model &model, obj::Material &material, osg::StateSet *stateset, const std::string & filename, const unsigned int texture_unit ) { if (!filename.empty()) { osg::ref_ptr< osg::Image > image; if ( !model.getDatabasePath().empty() ) { // first try with database path of parent. image = osgDB::readImageFile(model.getDatabasePath()+'/'+filename); } if ( !image.valid() ) { // if not already set then try the filename as is. image = osgDB::readImageFile(filename); } if ( image.valid() ) { osg::Texture2D* texture = new osg::Texture2D( image.get() ); osg::Texture::WrapMode textureWrapMode = osg::Texture::REPEAT; texture->setWrap(osg::Texture2D::WRAP_R, textureWrapMode); texture->setWrap(osg::Texture2D::WRAP_S, textureWrapMode); texture->setWrap(osg::Texture2D::WRAP_T, textureWrapMode); stateset->setTextureAttributeAndModes( texture_unit, texture,osg::StateAttribute::ON ); if ( material.textureReflection ) { osg::TexGen* texgen = new osg::TexGen; texgen->setMode(osg::TexGen::SPHERE_MAP); stateset->setTextureAttributeAndModes( texture_unit,texgen,osg::StateAttribute::ON ); } if ( image->isImageTranslucent()) { osg::notify(osg::INFO)<<"Found transparent image"<<std::endl; stateset->setMode(GL_BLEND, osg::StateAttribute::ON); stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN); } } } if (material.uScale != 1.0f || material.vScale != 1.0f || material.uOffset != 0.0f || material.vOffset != 0.0f) { osg::Matrix mat; if (material.uScale != 1.0f || material.vScale != 1.0f) { osg::notify(osg::DEBUG_INFO) << "Obj TexMat scale=" << material.uScale << "," << material.vScale << std::endl; mat *= osg::Matrix::scale(material.uScale, material.vScale, 1.0); } if (material.uOffset != 0.0f || material.vOffset != 0.0f) { osg::notify(osg::DEBUG_INFO) << "Obj TexMat offset=" << material.uOffset << "," << material.uOffset << std::endl; mat *= osg::Matrix::translate(material.uOffset, material.vOffset, 0.0); } osg::TexMat* texmat = new osg::TexMat; texmat->setMatrix(mat); stateset->setTextureAttributeAndModes( texture_unit,texmat,osg::StateAttribute::ON ); } } void ReaderWriterOBJ::buildMaterialToStateSetMap(obj::Model& model, MaterialToStateSetMap& materialToStateSetMap) const { if (_fixBlackMaterials) { // hack to fix Maya exported models that contian all black materials. int numBlack = 0; int numNotBlack = 0; obj::Model::MaterialMap::iterator itr; for(itr = model.materialMap.begin(); itr != model.materialMap.end(); ++itr) { obj::Material& material = itr->second; if (material.ambient==osg::Vec4(0.0f,0.0f,0.0f,1.0f) && material.diffuse==osg::Vec4(0.0f,0.0f,0.0f,1.0f)) { ++numBlack; } else { ++numNotBlack; } } if (numNotBlack==0 && numBlack!=0) { for(itr = model.materialMap.begin(); itr != model.materialMap.end(); ++itr) { obj::Material& material = itr->second; if (material.ambient==osg::Vec4(0.0f,0.0f,0.0f,1.0f) && material.diffuse==osg::Vec4(0.0f,0.0f,0.0f,1.0f)) { material.ambient.set(0.3f,0.3f,0.3f,1.0f); material.diffuse.set(1.0f,1.0f,1.0f,1.0f); } } } } for(obj::Model::MaterialMap::iterator itr = model.materialMap.begin(); itr != model.materialMap.end(); ++itr) { obj::Material& material = itr->second; osg::ref_ptr< osg::StateSet > stateset = new osg::StateSet; bool isTransparent = false; // handle material colors // http://java3d.j3d.org/utilities/loaders/obj/sun.html if (material.illum != 0) { osg::Material* osg_material = new osg::Material; stateset->setAttribute(osg_material); osg_material->setAmbient(osg::Material::FRONT_AND_BACK,material.ambient); osg_material->setDiffuse(osg::Material::FRONT_AND_BACK,material.diffuse); osg_material->setEmission(osg::Material::FRONT_AND_BACK,material.emissive); if (material.illum == 2) { osg_material->setSpecular(osg::Material::FRONT_AND_BACK,material.specular); } else { osg_material->setSpecular(osg::Material::FRONT_AND_BACK, osg::Vec4(0,0,0,1)); } osg_material->setShininess(osg::Material::FRONT_AND_BACK,(material.Ns/1000.0f)*128.0f ); // note OBJ shiniess is 0..1000. if (material.ambient[3]!=1.0 || material.diffuse[3]!=1.0 || material.specular[3]!=1.0|| material.emissive[3]!=1.0) { osg::notify(osg::INFO)<<"Found transparent material"<<std::endl; isTransparent = true; } } // handle textures enum TextureUnit { TEXTURE_UNIT_KD = 0, TEXTURE_UNIT_OPACITY }; load_material_texture( model, material, stateset.get(), material.map_Kd, TEXTURE_UNIT_KD ); load_material_texture( model, material, stateset.get(), material.map_opacity, TEXTURE_UNIT_OPACITY ); if (isTransparent) { stateset->setMode(GL_BLEND, osg::StateAttribute::ON); stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN); } materialToStateSetMap[material.name] = stateset.get(); } } osg::Geometry* ReaderWriterOBJ::convertElementListToGeometry(obj::Model& model, obj::Model::ElementList& elementList, bool& rotate) const { unsigned int numVertexIndices = 0; unsigned int numNormalIndices = 0; unsigned int numTexCoordIndices = 0; unsigned int numPointElements = 0; unsigned int numPolylineElements = 0; unsigned int numPolygonElements = 0; obj::Model::ElementList::iterator itr; for(itr=elementList.begin(); itr!=elementList.end(); ++itr) { obj::Element& element = *(*itr); numVertexIndices += element.vertexIndices.size(); numNormalIndices += element.normalIndices.size(); numTexCoordIndices += element.texCoordIndices.size(); numPointElements += (element.dataType==obj::Element::POINTS) ? 1 : 0; numPolylineElements += (element.dataType==obj::Element::POLYLINE) ? 1 : 0; numPolygonElements += (element.dataType==obj::Element::POLYGON) ? 1 : 0; } if (numVertexIndices==0) return 0; if (numNormalIndices!=0 && numNormalIndices!=numVertexIndices) { osg::notify(osg::NOTICE)<<"Incorrect number of normals, ignore them"<<std::endl; numNormalIndices = 0; } if (numTexCoordIndices!=0 && numTexCoordIndices!=numVertexIndices) { osg::notify(osg::NOTICE)<<"Incorrect number of normals, ignore them"<<std::endl; numTexCoordIndices = 0; } osg::Vec3Array* vertices = numVertexIndices ? new osg::Vec3Array : 0; osg::Vec3Array* normals = numNormalIndices ? new osg::Vec3Array : 0; osg::Vec2Array* texcoords = numTexCoordIndices ? new osg::Vec2Array : 0; if (vertices) vertices->reserve(numVertexIndices); if (normals) normals->reserve(numNormalIndices); if (texcoords) texcoords->reserve(numTexCoordIndices); osg::Geometry* geometry = new osg::Geometry; if (vertices) geometry->setVertexArray(vertices); if (normals) { geometry->setNormalArray(normals); geometry->setNormalBinding(osg::Geometry::BIND_PER_VERTEX); } if (texcoords) { geometry->setTexCoordArray(0,texcoords); } if (numPointElements>0) { unsigned int startPos = vertices->size(); unsigned int numPoints = 0; for(itr=elementList.begin(); itr!=elementList.end(); ++itr) { obj::Element& element = *(*itr); if (element.dataType==obj::Element::POINTS) { for(obj::Element::IndexList::iterator index_itr = element.vertexIndices.begin(); index_itr != element.vertexIndices.end(); ++index_itr) { vertices->push_back(transformVertex(model.vertices[*index_itr],rotate)); ++numPoints; } if (numNormalIndices) { for(obj::Element::IndexList::iterator index_itr = element.normalIndices.begin(); index_itr != element.normalIndices.end(); ++index_itr) { normals->push_back(transformNormal(model.normals[*index_itr],rotate)); } } if (numTexCoordIndices) { for(obj::Element::IndexList::iterator index_itr = element.texCoordIndices.begin(); index_itr != element.texCoordIndices.end(); ++index_itr) { texcoords->push_back(model.texcoords[*index_itr]); } } } } osg::DrawArrays* drawArrays = new osg::DrawArrays(GL_POINTS,startPos,numPoints); geometry->addPrimitiveSet(drawArrays); } if (numPolylineElements>0) { unsigned int startPos = vertices->size(); osg::DrawArrayLengths* drawArrayLengths = new osg::DrawArrayLengths(GL_LINES,startPos); for(itr=elementList.begin(); itr!=elementList.end(); ++itr) { obj::Element& element = *(*itr); if (element.dataType==obj::Element::POLYLINE) { drawArrayLengths->push_back(element.vertexIndices.size()); for(obj::Element::IndexList::iterator index_itr = element.vertexIndices.begin(); index_itr != element.vertexIndices.end(); ++index_itr) { vertices->push_back(transformVertex(model.vertices[*index_itr],rotate)); } if (numNormalIndices) { for(obj::Element::IndexList::iterator index_itr = element.normalIndices.begin(); index_itr != element.normalIndices.end(); ++index_itr) { normals->push_back(transformNormal(model.normals[*index_itr],rotate)); } } if (numTexCoordIndices) { for(obj::Element::IndexList::iterator index_itr = element.texCoordIndices.begin(); index_itr != element.texCoordIndices.end(); ++index_itr) { texcoords->push_back(model.texcoords[*index_itr]); } } } } geometry->addPrimitiveSet(drawArrayLengths); } // #define USE_DRAWARRAYLENGTHS if (numPolygonElements>0) { unsigned int startPos = vertices->size(); #ifdef USE_DRAWARRAYLENGTHS osg::DrawArrayLengths* drawArrayLengths = new osg::DrawArrayLengths(GL_POLYGON,startPos); geometry->addPrimitiveSet(drawArrayLengths); #endif for(itr=elementList.begin(); itr!=elementList.end(); ++itr) { obj::Element& element = *(*itr); if (element.dataType==obj::Element::POLYGON) { #ifdef USE_DRAWARRAYLENGTHS drawArrayLengths->push_back(element.vertexIndices.size()); #else if (element.vertexIndices.size()>4) { osg::DrawArrays* drawArrays = new osg::DrawArrays(GL_POLYGON,startPos,element.vertexIndices.size()); startPos += element.vertexIndices.size(); geometry->addPrimitiveSet(drawArrays); } else { osg::DrawArrays* drawArrays = new osg::DrawArrays(GL_TRIANGLE_FAN,startPos,element.vertexIndices.size()); startPos += element.vertexIndices.size(); geometry->addPrimitiveSet(drawArrays); } #endif if (model.needReverse(element)) { // need to reverse so add to OSG arrays in same order as in OBJ, as OSG assume anticlockwise ordering. for(obj::Element::IndexList::reverse_iterator index_itr = element.vertexIndices.rbegin(); index_itr != element.vertexIndices.rend(); ++index_itr) { vertices->push_back(transformVertex(model.vertices[*index_itr],rotate)); } if (numNormalIndices) { for(obj::Element::IndexList::reverse_iterator index_itr = element.normalIndices.rbegin(); index_itr != element.normalIndices.rend(); ++index_itr) { normals->push_back(transformNormal(model.normals[*index_itr],rotate)); } } if (numTexCoordIndices) { for(obj::Element::IndexList::reverse_iterator index_itr = element.texCoordIndices.rbegin(); index_itr != element.texCoordIndices.rend(); ++index_itr) { texcoords->push_back(model.texcoords[*index_itr]); } } } else { // no need to reverse so add to OSG arrays in same order as in OBJ. for(obj::Element::IndexList::iterator index_itr = element.vertexIndices.begin(); index_itr != element.vertexIndices.end(); ++index_itr) { vertices->push_back(transformVertex(model.vertices[*index_itr],rotate)); } if (numNormalIndices) { for(obj::Element::IndexList::iterator index_itr = element.normalIndices.begin(); index_itr != element.normalIndices.end(); ++index_itr) { normals->push_back(transformNormal(model.normals[*index_itr],rotate)); } } if (numTexCoordIndices) { for(obj::Element::IndexList::iterator index_itr = element.texCoordIndices.begin(); index_itr != element.texCoordIndices.end(); ++index_itr) { texcoords->push_back(model.texcoords[*index_itr]); } } } } } } return geometry; } osg::Node* ReaderWriterOBJ::convertModelToSceneGraph(obj::Model& model, bool& rotate, bool& noTesselateLargePolygons, bool& noTriStripPolygons) const { if (model.elementStateMap.empty()) return 0; osg::Group* group = new osg::Group; // set up the materials MaterialToStateSetMap materialToSetSetMap; buildMaterialToStateSetMap(model, materialToSetSetMap); // go through the groups of related elements and build geometry from them. for(obj::Model::ElementStateMap::iterator itr=model.elementStateMap.begin(); itr!=model.elementStateMap.end(); ++itr) { const obj::ElementState& es = itr->first; obj::Model::ElementList& el = itr->second; osg::Geometry* geometry = convertElementListToGeometry(model,el,rotate); if (geometry) { osg::StateSet* stateset = materialToSetSetMap[es.materialName].get(); geometry->setStateSet(stateset); // tesseleate any large polygons if (!noTesselateLargePolygons) { osgUtil::Tessellator tessellator; tessellator.retessellatePolygons(*geometry); } // tri strip polygons to improve graphics peformance if (!noTriStripPolygons) { osgUtil::TriStripVisitor tsv; tsv.stripify(*geometry); } // if no normals present add them. if (!geometry->getNormalArray() || geometry->getNormalArray()->getNumElements()==0) { osgUtil::SmoothingVisitor sv; sv.smooth(*geometry); } osg::Geode* geode = new osg::Geode; geode->addDrawable(geometry); if (es.objectName.empty()) { geode->setName(es.groupName); } else if (es.groupName.empty()) { geode->setName(es.objectName); } else { geode->setName(es.groupName + std::string(":") + es.objectName); } group->addChild(geode); } } return group; } // read file and convert to OSG. osgDB::ReaderWriter::ReadResult ReaderWriterOBJ::readNode(const std::string& file, const osgDB::ReaderWriter::Options* options) const { std::string ext = osgDB::getLowerCaseFileExtension(file); if (!acceptsExtension(ext)) return ReadResult::FILE_NOT_HANDLED; std::string fileName = osgDB::findDataFile( file, options ); if (fileName.empty()) return ReadResult::FILE_NOT_FOUND; std::ifstream fin(fileName.c_str()); if (fin) { // code for setting up the database path so that internally referenced file are searched for on relative paths. osg::ref_ptr<Options> local_opt = options ? static_cast<Options*>(options->clone(osg::CopyOp::SHALLOW_COPY)) : new Options; local_opt->setDatabasePath(osgDB::getFilePath(fileName)); obj::Model model; model.setDatabasePath(osgDB::getFilePath(fileName.c_str())); model.readOBJ(fin, local_opt.get()); // code for checking the nonRotation, noTesselateLargePolygons, // and noTriStripPolygons bool rotate = true; bool noTesselateLargePolygons = false; bool noTriStripPolygons = false; if (options!=NULL) { if (options->getOptionString() == "noRotation") { rotate = false; } if (options->getOptionString() == "noTesselateLargePolygons") { noTesselateLargePolygons = true; } if (options->getOptionString() == "noTriStripPolygons") { noTriStripPolygons = true; } } osg::Node* node = convertModelToSceneGraph(model,rotate, noTesselateLargePolygons,noTriStripPolygons); return node; } return ReadResult::FILE_NOT_HANDLED; } osgDB::ReaderWriter::ReadResult ReaderWriterOBJ::readNode(std::istream& fin, const Options* options) const { if (fin) { obj::Model model; model.readOBJ(fin, options); // code for checking the nonRotation, noTesselateLargePolygons, // and noTriStripPolygons bool rotate = true; bool noTesselateLargePolygons = false; bool noTriStripPolygons = false; if (options!=NULL) { if (options->getOptionString() == "noRotation") { rotate = false; } if (options->getOptionString() == "noTesselateLargePolygons") { noTesselateLargePolygons = true; } if (options->getOptionString() == "noTriStripPolygons") { noTesselateLargePolygons = true; } } osg::Node* node = convertModelToSceneGraph(model,rotate, noTesselateLargePolygons,noTriStripPolygons); return node; } return ReadResult::FILE_NOT_HANDLED; }
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