Hi Shoham,
Could it be a near clipping problem? I dont' know. Its could be some
many things, I really can't help debug it though, you have your app,
you have your data, you have all the source code - just adds some
break points or debugging messages into the code and see whether the
text is being traversed ok in the cull and draw traversals.
Robert.
On 1/22/07, Shoham Ben-Har <[EMAIL PROTECTED]> wrote:
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
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> http://openscenegraph.net/mailman/listinfo/osg-users
> http://www.openscenegraph.org/
>
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