Made update, cull and draw callbacks virtual to allow custom Drawable's to there own specific extensions for handling callbacks
Made update, cull and draw callbacks virtual to allow custom Drawable's
to there own specific extensions for handling callbacks


XiaoCC/osg,ntoand/osg,ghub/osg,stmh/osg,XiaoCC/osg,artoolkit/osg,ntoand/osg,ghub/osg,stmh/osg,stmh/osg,stmh/osg,ghub/osg,XiaoCC/osg,koshman86/osg,stmh/osg,omega-hub/osg,artoolkit/osg,omega-hub/osg,artoolkit/osg,ntoand/osg,koshman86/osg,omega-hub/osg,koshman86/osg,omega-hub/osg,ghub/osg,ntoand/osg,artoolkit/osg,XiaoCC/osg,koshman86/osg,XiaoCC/osg