title: Label on AxisHelper withTextGeometry and rotation issue
body: <p>I have a main scene with a sphere and another subwindow (in right bottom) where I have drawn the (x,y,z) axis of main scene.</p>
  <p>In this subwindow, I would like to draw the labels &quot;X&quot; &quot;Y&quot; and &quot;Z&quot; on each axis (more precisely located on the end of each AxisHelper). I know how to use TextGeometry but the issue is that I can't get to make rotate these labels in order to make them appear always in face on the user.</p>
  <p>You can see the problem on the [following link][1] : label &quot;X&quot; is fixed relatively to axis and is rotating with camera, so it is not always in face of user.</p>
  <p>From these two links <a href="https://stackoverflow.com/questions/12919638/textgeometry-to-always-face-user">link1</a> and <a href="https://stackoverflow.com/questions/20398652/three-js-textgeometry-text-alignment-gets-messed-up-after-re-setting-the-rotati">link2</a>, I tried to add (in my example, I tried with only &quot;X&quot; label) :</p>
  <pre><code>function addLabelAxes() {
  
    // Axes label
    var loader = new THREE.FontLoader();
    loader.load( 'js/helvetiker_regular.typeface.js', function ( font ) {
  
    var textGeo1 = new THREE.TextGeometry( 'X', {
        font: font,
        size: 5,
        height: 0.1,
        bevelThickness: 0.1,
        bevelSize: 0.1,
        bevelEnabled: true,
    } );
  
    var  color = new THREE.Color();
    color.setRGB(255, 255, 255);
    textMaterial = new THREE.MeshBasicMaterial({ color: color });
    var meshText1 = new THREE.Mesh(textGeo1, textMaterial);
  
    // Position of axes extremities 
    var positionEndAxes = axes2.geometry.attributes.position;
  
    var label1X = positionEndAxes.getX(0);
    meshText1.position.x = label1X + axisLength;
    meshText1.position.y = 0;
    meshText1.position.z = 0;
  
    // Rotation of &quot;X&quot; label
    //meshText1.rotation = zoomCamera.rotation;
    meshText1.lookAt(zoomCamera.position);
  
    // Add meshText to zoomScene
    zoomScene.add(meshText1);
  
    });
  
  }
  </code></pre>
  <p><code>zoomCamera</code> represents a <code>PerspectiveCamera</code> which is the camera of subwindow (i.e <code>zoomScene</code>) ;I add TextGeometry to <code>zoomScene</code> by doing :</p>
  <pre><code>zoomScene.add(meshText1);
  </code></pre>
  <p>What might be wrong in my code ? I wonder if I can make rotate the &quot;X&quot; label on itself, i.e the &quot;X&quot; label is rotating like axis but a self (local) orientation is applied as a function of rotation theta angle, so the label is always kept in face of user during camera rotation ?</p>