[ osg::Box ] 박스 그리기

osg::ref_ptr<osg::Geode> boxGeo = new osg::Geode;
 osg::ref_ptr<osg::Box> box (new osg::Box(center, lengthX, lengthY,lengthZ));

 //Create Box
 osg::ref_ptr<osg::ShapeDrawable> capsuledrawable (new osg::ShapeDrawable(box.get()));
 capsuledrawable->setColor(osg::Vec4(0.5f, 0.5f, 0.5f, 1.f));//set color
 boxGeo->addDrawable(capsuledrawable.get());

mRoot->addChild(model.get(), true);//switch node