Hi JSG,
Nick http://www.linkedin.com/in/tnikolov Sent from Gümüşsuyu, İstanbul, Turkey On Mon, Dec 7, 2009 at 6:02 AM, Jean-Sébastien Guay < [email protected]> wrote: > Hello Trajce, > > > I have osg file and I am doing traversal to get nodes with given >> name. In the osg file, I see the Geode with the name, however the >> visitor never gets there >> > > [...] > > > virtual void apply(osg::Group& node) >> { >> for (unsigned int i=0; i<node.getNumChildren(); ++i) >> { >> traverse(*node.getChild(i)); >> } >> } >> > > Well first of all, you don't need this, the osg::NodeVisitor base class > version of apply(osg::Group&) will traverse all children of a group already. > > yea ... I was doing couple of testings so I put the other sample > > virtual void apply(osg::Geode& node) >> { >> osg::Node::DescriptionList& dl = node.getDescriptions(); >> osg::Node::DescriptionList::iterator itr = dl.begin(); >> for (; itr != dl.end(); ++itr) >> { >> if (itr->find_first_of("#MIRROR") != std::string::npos) >> { >> std::cout << "Never gets here !" << std::endl; >> } >> } >> traverse(node); >> } >> > > Here, you're not checking the node's name, you're checking its description > list... In addition, find_first_of doesn't do what you think it does. It > finds the first occurence of *any* of the characters in the string you pass > (so the first occurence of either '#' 'M' 'I'...). Try this instead: > > > virtual void apply(osg::Geode& node) > { > if (node.getName().find("#MIRROR") != std::string::npos) > { > std::cout << "Should get here if one of the Geodes' name has > #MIRROR in it" << std::endl; > } > traverse(node); > } > > std::string::find returns the first occurrence of the argument within the > string object you call it on, or std::string::npos if not found. > > good hint ... Thanks ! > Also note that you're only checking Geodes here... If you want to find any > node that has #MIRROR in its name, you might want to override the > apply(osg::Node& node), which will be called for all types of nodes (as long > as you don't override other versions of apply() ). > > And a little tip I imagine you know, but just in case: you can write your > scene graph to a .osg file (either with osgDB::writeNodeFile() in code or > with osgconv on the command line) and then inspect it with a text editor to > make sure one of the nodes really has #MIRROR in its name. > That is what I am doing to check the scenegraph. Its been quite a while since I used OSG and just need time to get a hand of it again. Forgot many things ... But I learn fast ;-) Thanks a gain for the support > > Hope this helps, > > J-S > -- > ______________________________________________________ > Jean-Sebastien Guay [email protected] > http://www.cm-labs.com/ > http://whitestar02.webhop.org/ > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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