Hi all,
I was wondering if someone could help me out with respect to correcting
my understanding of shadows and node masks. I am using OpenSceneGraph 3.0.1.
I have created a scene, including a osgShadow::ShadowedScene. I have set
the node mask for receiving shadows (via setReceivesShadowTraversalMask)
to 1, and the mask to cast shadows (via setCastsShadowTraversalMask) to
2. I am using ShadowTexture- I have not been able to get the other
techniques to work properly.
I have some text (osgText::Text) that I wish to attach to an animated
model, screen-facing. I neither want to cast nor receive shadows from
this text. The text is attached to a osg::Geode, which is attached to a
osg::MatrixTransform, which the model is also attached to, indirectly.
Up the tree a little bit, the osgShadow::ShadowedScene can be found.
If I leave the Geode as-is, it takes the default all-bits-set node mask,
and casts a shadow. If I set it to 2, it casts a shadow. If I set it to
1, it doesn't cast one, but receives shadows from objects in the scene.
If I then set the Geode node mask to 0, or 4, both of which should
indicate no shadow casting or receiving (as bits zero and one are not
set), the text vanishes entirely.
Now, obviously it shouldn't do that.
I saw similar symptoms when playing with osgEphemeris, but didn't dig
into it further when I shifted away from using it.
If believe that if I reparent the scene so that it lies outside of the
ShadowedScene, it appears correctly. This is because I have a scene
fadeout using RTT, and I reparent the scene so that it does not touch a
ShadowedScene in this case, and the text appears again during the
transition.
I am wondering if my understanding of node masks and how they interact
with osgShadow is correct. If not, if someone could indicate where and
how I am using them incorrectly, it would be appreciated.
I was also wondering with respect to modern-day usage, which parts of
osgShadow would be considered most reliable and mature.
Cheers,
Garth
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