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;
}
osg::Node* ReaderWriterOBJ::convertModelToSceneGraph(obj::Model& model, ObjOptionsStruct& localOptions, const Options* options) const
{
if (model.elementStateMap.empty()) return 0;
osg::Group* group = new osg::Group;
// set up the materials
MaterialToStateSetMap materialToStateSetMap;
buildMaterialToStateSetMap(model, materialToStateSetMap, localOptions, options);
// 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,localOptions);
if (geometry)
{
MaterialToStateSetMap::const_iterator it = materialToStateSetMap.find(es.materialName);
if (it == materialToStateSetMap.end())
{
OSG_WARN << "Obj unable to find material '" << es.materialName << "'" << std::endl;
}
osg::StateSet* stateset = materialToStateSetMap[es.materialName].get();
geometry->setStateSet(stateset);
// tesseleate any large polygons
if (!localOptions.noTesselateLargePolygons)
{
osgUtil::Tessellator tessellator;
tessellator.retessellatePolygons(*geometry);
}
// tri strip polygons to improve graphics performance
if (!localOptions.noTriStripPolygons)
{
osgUtil::optimizeMesh(geometry);
}
// if no normals present add them.
if (localOptions.generateFacetNormals==false && (!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;
}