Hi Paul, You haven't provided a stack trace, or how you manage your nodes and pointers so there isn't much we can say specifically.
As a general comment, these type of crashes on what should otherwise be a perfect reasonable operation, is usually down to dangling pointers of some kind. In your case perhaps the node has been deleted elsewhere so your node_unsel pointer is invalid, or the pointer to the material is invalid. If you are keeping pointers around to objects in the scene graph you shouldn't use C pointers as they can easily become dangling pointers. If you do need to keep a pointer around either use an osg::ref_ptr<> to make sure you keep the object alive even when all other references to it are removed, or use an osg::observer_ptr<> that automatically gets reset to 0 when the object it pointers is deleted. Robert. On 28 November 2017 at 16:35, Paul Bigeon <[email protected]> wrote: > Hi, > > Considering I've created an osg::Material this way, and that the nodes are > shown on screen : > > > Code: > > m_material_selected = new osg::Material(); > m_material_selected->setDiffuse(osg::Material::FRONT_AND_BACK, > osg::Vec4f(0.2f, 0.2f, 0.75f, 0.5f)); > m_material_selected->setSpecular(osg::Material::FRONT_AND_BACK, > osg::Vec4f(0.2f, 0.2f, 0.75f, 0.5f)); > m_material_selected->setShininess(osg::Material::FRONT_AND_BACK, 75.0); > m_material_selected->setColorMode(osg::Material::AMBIENT); > > > > > And then I set it to a node like this ( this is apparently working so far ... > ) : > > > Code: > > // Where node_sel is a previously created osg::Node* > node_sel->getOrCreateStateSet()->setAttribute(m_material_selected, > osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE); > > > > > But when I try to remove this attribute from the previously created node like > this : > > > Code: > > // Where node_unsel = node_sel; > node_unsel->getOrCreateStateSet()->removeAttribute(m_material_selected); > > > > > My app crashes. > > What did I do wrong ? Is it unsafe to removeAttribute from a node this way ? > I've seen on the forum things like NodeVisitor class, should I be using this > or can I change nodes manually ? > > > Thank you for your interest in my question, > > Have a good day, > > Paul > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=72479#72479 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
