     mesh.leftLine = new THREE.Line3();
      mesh.topLine = new THREE.Line3();
      mesh.update = () => {
        mesh.leftLine.start
          .set(-menuWorldWidth/2, menuWorldHeight*4/2, 0)
          .applyMatrix4(mesh.matrixWorld);
        mesh.leftLine.end
          .set(-menuWorldWidth/2, -menuWorldHeight*4/2, 0)
          .applyMatrix4(mesh.matrixWorld);

        mesh.topLine.start
          .set(-menuWorldWidth/2, menuWorldHeight*4/2, 0)
          .applyMatrix4(mesh.matrixWorld);
        mesh.topLi