Hello!
I'm using impostors in my application. I searched the mailing list for
mails and the osgimpostor example that could answer the issue i have, but not
one can answer.
To test the impostors, i just use them on 3 osg::Sphere. So for one osg::Sphere
i wrote the following code:
osg::ref_ptr<osgSim::Impostor> impostor = new osgSim::Impostor();
impostor->setImpostorThreshold(DistVisu/2);
impostor->addChild(PlanetGeode.get()); /*PlanetGeode contains the osg::Sphere*/
impostor->setRange(0,0.0f,DistVisu);
impostor->setCenter(PlanetGeode.get()->getBound.center());
But at runtime, i have white quads instead of the images that should have
been cached by the impostors.
Then i thought it was because i forgot those 3 lines:
osgSim::InsertImpostorsVisitor ov;
root->accept(ov); /*root is an osg::Group that contains the three impostors*/
ov.insertImpostors();
But those lines did not change anything, i still have the 3 white quads.
And when i rotate the scene, i can see that the 3 quads do not point the
viewer. In a while, when rotating, the 3 white quads are replaced by the
osg::Sphere, and then the "LOD" does not seem to work anymore: when i move away
from the 3 osg::Sphere, the spheres does not disappear but stay displayed until
they are as big as one pixel.
Did i forget something in my code that makes the impostors not working
properly? And why the quads (the cached images) do not rotate toward the viewer
like billboards?
I thank you in advance!
Belthil
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