thank you filip! this might just be what i was looking for :) but i'm getting OpenGL errors here ...
Code: Warning: detected OpenGL error 'invalid operation' at end of SceneView::draw() Warning: detected OpenGL error 'invalid operation' at start of State::apply() the letter one keeps piling up as the app runs. i wrote this code into the main function just before calling the optimizer and viewer.run(); Code: osg::ref_ptr<osg::Group> rootNode = new osg::Group; { osg::Stencil* stencil = new osg::Stencil; stencil->setFunction(osg::Stencil::ALWAYS, 1, ~0u); stencil->setOperation(osg::Stencil::ZERO, osg::Stencil::ZERO, osg::Stencil::REPLACE); osg::StateSet* ssb1 = new osg::StateSet(); ssb1->setMode(GL_CULL_FACE, osg::StateAttribute::OFF); ssb1->setAttributeAndModes(stencil, osg::StateAttribute::ON); rootNode->setStateSet(ssb1); } rootNode->addChild(loadedModel.get()); viewer.getCamera()->setPostDrawCallback(new PostDrawCallback()); and then the callback Code: class PostDrawCallback : public osg::Camera::DrawCallback { virtual void operator () (osg::RenderInfo& renderInfo) const { osg::ref_ptr<osg::Image> img = new osg::Image; osg::View *view = renderInfo.getView(); int width = view->getCamera()->getViewport()->width(); int height = view->getCamera()->getViewport()->height(); img->readPixels(0, 0, width, height, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE); } }; if i comment out the readpixels method, the errors do not apear. what am i missing [Question] [Arrow] ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=44186#44186 _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org