Added event handler to shader code so that alphaCuttOff, transparency and sampleDensity are controlled via 'a', 't' and 'd' respectively.
Added event handler to shader code so that alphaCuttOff, transparency and
sampleDensity are controlled via 'a', 't' and 'd' respectively.


artoolkit/osg,tomasthoresen/osg,artoolkit/osg,marchelbling/osg,artoolkit/osg,openscenegraph/osg,openscenegraph/osg,tomasthoresen/osg,jtorresfabra/osg,tomasthoresen/osg,jtorresfabra/osg,openscenegraph/osg,scrawl/osg,marchelbling/osg,scrawl/osg,marchelbling/osg,jtorresfabra/osg,openscenegraph/osg,scrawl/osg,scrawl/osg,marchelbling/osg,tomasthoresen/osg,artoolkit/osg,jtorresfabra/osg