Hi,
I solved. The Problem is a null pointer of material, after :
osg::Material * material = (osg::Material *)
wireframe_subgraph->getOrCreateStateSet()->getAttribute(osg::StateAttribute::MATERIAL);
command.
I solved simply in this way :
osg::Material * material = new osg::Material();
material->setTransparency(osg::Material::FRONT_AND_BACK, 1. - Opacity);
wireframe_subgraph->getOrCreateStateSet()->setRenderBinDetails(0,
"transparent");
wireframe_subgraph->getOrCreateStateSet()->setMode( GL_BLEND,
osg::StateAttribute::ON );
wireframe_subgraph->getOrCreateStateSet()->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
wireframe_subgraph->getOrCreateStateSet()->setAttributeAndModes(material,
osg::StateAttribute::OVERRIDE);
...
Sorry.
Andrea
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=37886#37886
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