E.Float32BufferAttribute([0, 0, 0, 0, 0, - 1], 3));
          geometry.setAttribute('color', new THREE.Float32BufferAttribute([0.5, 0.5, 0.5, 0, 0, 0], 3));

          material = new THREE.LineBasicMaterial({ vertexColors: true, blending: THREE.AdditiveBlending });

          return new THREE.Line(geometry, material);
        case 'gaze':
          geometry = new THREE.RingGeometry(0.02, 0.04, 32).translate(0, 0, - 1);
          material = new THREE.MeshBasicMaterial({ opacity: 0.5, transparent: true });
  