Re: [osg-users] Insert an image before a text

[Robert Osfield]

Images won't render on their own you need to create some geometry to render
the texture on.  You don't mentioned anything about creating geometry but
it could easily by that you've just not mentioned it.

There is a convenience function for created a quad geometry appropriate for
rendering textures on, see:

   osg::createTexturedQuadGeometry()

The OSG examples that use this are:
:~/Dev/OpenSceneGraph/examples$ grep -r "osg::createTexturedQuadGeometry" .
./osgmovie/osgmovie.cpp:osg::Geometry* pictureQuad =
osg::createTexturedQuadGeometry(pos,
./osgmovie/osgmovie.cpp:osg::Geometry* pictureQuad =
osg::createTexturedQuadGeometry(pos,
./osgatomiccounter/osgatomiccounter.cpp:osg::Geometry * quad =
osg::createTexturedQuadGeometry(osg::Vec3f(-2.0f, 0.0f, -2.0f),
./osgcomputeshaders/osgcomputeshaders.cpp:osg::Geometry* geom =
osg::createTexturedQuadGeometry(
./osgtext3D/osgtext3D.cpp:geode->addDrawable(
osg::createTexturedQuadGeometry(osg::Vec3(0.0f,characterSize*thickness,0.0f),osg::Vec3(characterSize,0.0,0.0),osg::Vec3(0.0f,0.0,characterSize),
0.0, 0.0, 1.0, 1.0) );
./osgcatch/osgcatch.cpp:osg::Geometry* geometry =
osg::createTexturedQuadGeometry(pos,width,height);
./osgcatch/osgcatch.cpp:osg::Geometry* geometry =
osg::createTexturedQuadGeometry(pos,width,height);
./osgcatch/osgcatch.cpp:osg::Geometry* geometry =
osg::createTexturedQuadGeometry(pos,width,height);
./osgcatch/osgcatch.cpp:osg::Geometry* geometry =
osg::createTexturedQuadGeometry(pos,width,height);
./osgcatch/osgcatch.cpp:osg::Geometry* geometry =
osg::createTexturedQuadGeometry(_origin,_width,_height);
./osgcatch/osgcatch.cpp:osg::Geometry* geometry =
osg::createTexturedQuadGeometry(_origin,_width,_height);
./osgcatch/osgcatch.cpp:osg::Geometry* geometry =
osg::createTexturedQuadGeometry(_origin,_width,_height);
./osgcatch/osgcatch.cpp:osg::Geometry* geometry =
osg::createTexturedQuadGeometry(_origin,_width,_height);
./osgSSBO/osgSSBO.cpp:geom = osg::createTexturedQuadGeometry(placement,
osg::Vec3(1.0f*scale, 0.0f, 0.0f), osg::Vec3(0.0f, 0.0f,
ratio*1.0f*scale));
./osgSSBO/osgSSBO.cpp:geom = osg::createTexturedQuadGeometry(placement,
osg::Vec3(ratio*1.0f*scale, 0.0f, 0.0f), osg::Vec3(0.0f, 0.0f,
1.0f*scale));
./osgsampler/osgSampler.cpp:((osg::Geode*)geode.get())->addDrawable(
osg::createTexturedQuadGeometry(osg::Vec3(0,0,0),osg::Vec3(1,0,0),osg::Vec3(0,0,1)
));
./osgshadow/osgshadow.cpp:geode->addDrawable(
osg::createTexturedQuadGeometry( centerBase-widthVec*1.5f-depthVec*1.5f,
./osgimagesequence/osgimagesequence.cpp:geode->addDrawable(
osg::createTexturedQuadGeometry(osg::Vec3(0.0f,0.0f,0.0),
osg::Vec3(1.0f,0.0f,0.0), osg::Vec3(0.0f,0.0f,1.0f)));
./osgblenddrawbuffers/osgblenddrawbuffers.cpp:osg::Geometry* geom =
osg::createTexturedQuadGeometry(
./osgmultiplemovies/osgmultiplemovies.cpp:geo =
osg::createTexturedQuadGeometry(p, osg::Vec3(w, 0, 0), osg::Vec3(0, 0,
desired_height), 0, tex_t, tex_s, 0);
./osgmultiplemovies/osgmultiplemovies.cpp:geo =
osg::createTexturedQuadGeometry(p, osg::Vec3(w, 0, 0), osg::Vec3(0, 0,
desired_height), 0, 0, tex_s, tex_t);
./osgdeferred/osgdeferred.cpp:osg::Geometry* geom =
osg::createTexturedQuadGeometry(

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[osg-users] Insert an image before a text

[marco....@elmansrl.eu]

Hi Guys,

I need to create a label, in which to insert a text and an image from .png 
file.

The label with text ONLY has already been created, as below:

osg::ref_ptr text = new osgText::Text;
text->setText("Tr text");
osg::ref_ptr textBoat = new osg::Geode;
textBoat->addDrawable(text);

Then, since I have few experience with osg::Image and osg::Text, I tried as 
solution, to implement a texture inside a StateSet to insert into a Geode,

osg::Texture2D* texture = new osg::Texture2D;
texture->setDataVariance(osg::Object::DYNAMIC);
osg::Image* 
Image=osgDB::readImageFile(std::string(url+"/Images/flags_png/abw.png"));
texture->setImage(image);
osg::StateSet* stateTex = new osg::StateSet();
stateTex->setTextureAttributeAndModes(0, texture, osg::StateAttribute::ON);
textBoat->setStateSet(stateTex);

Then, the text is correctly created, but I don't have the image.

Can anyone show me the right way to go?

Thanks

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