Hi all,
If anyone finds this useful, my current solution, combining help from this
thread and Paul Martz at http://forum.openscenegraph.org/viewtopic.php?t=13877,
looks like the following:
Code:
osg::StateSet* state = _rootGroup->getOrCreateStateSet();
if (op == 1)
{
state->removeAttribute(osg::StateAttribute::BLENDCOLOR);
state->removeAttribute(osg::StateAttribute::BLENDFUNC);
state->setRenderingHint(osg::StateSet::DEFAULT_BIN);
}
else
{
osg::BlendColor* bc = new osg::BlendColor(osg::Vec4(1.0, 1.0, 1.0, op));
osg::BlendFunc *bf = new osg::BlendFunc();
state->setAttributeAndModes(bf, osg::StateAttribute::ON);
state->setAttributeAndModes(bc, osg::StateAttribute::ON);
bf->setSource(osg::BlendFunc::CONSTANT_ALPHA);
bf->setDestination(osg::BlendFunc::ONE_MINUS_CONSTANT_ALPHA);
state->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
}
Next I'll try to see if I can set a material so that the blend settings are
ignored for a part of the sub-tree.
Thanks for all the help that carried me this far!
Claudio
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=75790#75790
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