Hi Don! I think that you can try enabling GL_BLEND mode in your StateSet (if it is not already enabled).
Best regards, Yurii Monakov 2010/12/16 Don Leich <d...@ilight.com>: > Hi all, > > I've got a problem that I haven't been able to find a solution > for and could use some help. I'm using the standard texture file > "OpenSceneGraph-Data/Images/sphere.gif" as the source image for > point sprites. The file is an image of a shaded sphere against > a fully transparent background. > > I can set a state to properly render small 2-D sphere images with > GL_POINTS primitive type. I needed to add sprites to my scene > graph after some other content that requires setting a different > state first. The point sprites after this other content will show > the shaded sphere image correctly, but will now also render the > sphere image background even though it should be fully transparent. > > Adding osg::StateAttribute::OVERRIDE to the blend function state > was a thought, but no help. > > fn->setFunction(osg::BlendFunc::SRC_ALPHA, > osg::BlendFunc::ONE_MINUS_SRC_ALPHA); > > _state->setAttributeAndModes(fn, > osg::StateAttribute::OVERRIDE|osg::StateAttribute::ON); > > A dump and compare of .osg files didn't yield any insight. Does > anyone have a suggestion for a possible fix here or maybe a way > to debug the state with OSG internals? What besides BlendFunc > should be in influence here? Does it sound like I'm just not > applying the state where I think I am? > > Thanks, > -Don Leich > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
