Hey... I looked over some osgText samples and I solve my problem by edit the StateSet of the Geode node that hold the text. like the following:
osg::StateSet* ptrTextState = geode->getOrCreateStateSet(); ptrTextState->setMode(GL_LIGHTING,osg::StateAttribute::OFF | osg::StateAttribute::PROTECTED | osg::StateAttribute::OVERRIDE); ptrTextState->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF | osg::StateAttribute::PROTECTED | osg::StateAttribute::OVERRIDE); ptrTextState->setRenderBinDetails( TEXT_RENDER_BIN_NUMBER, "RenderBin", osg::StateSet::RenderBinMode::OVERRIDE_RENDERBIN_DETAILS); On 1/22/07, Paul Martz <[EMAIL PROTECTED]> wrote:
Are you trying to draw text that is coplanar to a polygon in your model? If so, you probably have some z-fighting going on. -Paul > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > Shoham Ben-Har > Sent: Monday, January 22, 2007 2:57 AM > To: osg users > Subject: Re: [osg-users] Problem In osgText::Text. > > hey... > > I did all of the things you wrote to me and still the text is > disappear :( I think it's somehow related to the fact that > the osgText is over a .flt model (in ortho view). > that thought came to me after I moved the text away of the > model and the problem gone. > But I prefer a final solution because the text is supposed to > be over the model... > > Is the fact that the text is over the model give more information??? > > Shoham. > > > > On 1/21/07, Robert Osfield <[EMAIL PROTECTED]> wrote: > > HI Shoham, > > > > I can't really say what might be the cause of the problem, > there are > > just too many things that could be going on in your app. > > > > General comments on the callback is that rather than use a > > NodeCallback try attaching the callback to the Text itself > > (Drawable::UpdateCallback). > > > > Also in your code don't use C casts use > dynamic_cast<osgText::Text*>() > > instead and check the return value to make sure its non null. > > > > Another defensive programming time would be to not do a > getDrawable(0) > > without first checking that enough drawable exist as there > is always a > > chance you scene graph isn't set up correctly and as your intend. > > > > The last item to be aware of is management of multiple graphics > > contexts, this may or may not have some baring on your app > as I know > > nothing about your app. > > > > Robert. > > > > On 1/21/07, Shoham Ben-Har <[EMAIL PROTECTED]> wrote: > > > Hello > > > > > > I have some problem with osgText::Text. > > > I tried to do the following: > > > I create a osg::Group And attach to it a osg::Geode To > the Geode I > > > add a drawable osgText::Text. > > > later I set Update Callback to the osgText::Text, and in that > > > callback I change the text via setText. > > > I have 1 integer and 1 float in the text with I put them > in a string > > > via sprintf. > > > The problem is that the text disappear after I change > some value in > > > the text (usually when I change the float). > > > It's not consistent, it's disappear and then show up > again after another change. > > > > > > > > > > > > > > > m_GroupInterceptorData = new osg::Group; > > > m_GroupInterceptorData->setNodeMask(GODS_VIEW_MASK); > > > m_TextInterceptorData = new osgText::Text; > > > osgText::Font *font = > osgText::readFontFile("fonts/mriam.ttf"); > > > TextInterceptorData > ->setCharacterSize(AIRCRAFT_DATA_TEXT_SIZE); > > > TextInterceptorData > ->setAxisAlignment(osgText::Text::XY_PLANE); > > > TextInterceptorData > ->setLayout(osgText::Text::LEFT_TO_RIGHT); > > > TextInterceptorData ->setFont(font); > > > TextInterceptorData > > > ->setFontResolution(AIRCRAFT_DATA_TEXT_SIZE, > > > AIRCRAFT_DATA_TEXT_SIZE); > > > TextInterceptorData > ->setAlignment(osgText::Text::LEFT_CENTER); > > > TextInterceptorData > ->setCharacterSizeMode(osgText::Text::SCREEN_COORDS); > > > TextInterceptorData ->setColor(AIRCRAFT_DATA_COLOR); > > > osg::Geode *geodeInterceptor = new osg::Geode(); > > > > geodeInterceptor->addDrawable(m_TextInterceptorData.get()); > > > geodeInterceptor->setUpdateCallback(new > > > CInterceptorDataUpdateCallback(m_SceneManager)); > > > m_GroupInterceptorData->addChild(geodeInterceptor); > > > > > > The callback: > > > > > > char content[128]; > > > sprintf(content,"H: %d Kft\nV: %.1lf > Mach",heightAboveTerrain,velocity); > > > osgText::Text* text = > (osgText::Text*)(currentGeode->getDrawable(0)); > > > text->setText(content); > > > text->setPosition(position); > > > > > > > > > Help please... > > > _______________________________________________ > > > osg-users mailing list > > > [email protected] > > > http://openscenegraph.net/mailman/listinfo/osg-users > > > http://www.openscenegraph.org/ > > > > > _______________________________________________ > > osg-users mailing list > > [email protected] > > http://openscenegraph.net/mailman/listinfo/osg-users > > http://www.openscenegraph.org/ > > > _______________________________________________ > osg-users mailing list > [email protected] > http://openscenegraph.net/mailman/listinfo/osg-users > http://www.openscenegraph.org/ _______________________________________________ osg-users mailing list [email protected] http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
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