Someone

		mSceneMgr->setAmbientLight( ColourValue( 1, 1, 1 ) );
		SceneNode *node1 = mSceneMgr->getRootSceneNode()->createChildSceneNode( "axisnode" );
		ManualObject* mo = new ManualObject("axis");
		mo->clear();
		mo->begin("", RenderOperation::OT_LINE_LIST);
			mo->colour (1.0f, 0, 0, 1.0f);
			mo->position(-100, 0, 0);
			mo->position(100, 0, 0);
			mo->colour (0, 1.0f, 0, 1.0f);
			mo->position(0, -100, 0);
			mo->position(0, 100, 0);
			mo->colour (0, 0, 1.0f, 1.0f);
			mo->position(0, 0, -100);
			mo->position(0, 0, 100);
		mo->end();
		node1->attachObject( mo );