title: three.js - scaling/transforming of tube geometry
body: <p>I've a tube geometry with 174 points, 12 radius segment, 100 radius and 174 segments.
  When I double click at any part of a tube, the scaled portion of a tube with +/- 8 points will be displayed.
  Now the issue is when I click at bending part of a tube, the scaled portion does not look as good as I click on a straight part of a tube.</p>
  
  <p>Please find below the 2 images.<img src="https://i.stack.imgur.com/s74Jm.png" alt="3d full piipe"><img src="https://i.stack.imgur.com/0eqv5.png" alt="portion selected at bend"></p>
  
  <p>Please find <a href="http://jsfiddle.net/WT6jL/23/" rel="nofollow noreferrer">jsfiddle</a> here.</p>
  
  <p>Please find below the code of scaling.</p>
  
  <pre><code>tube = new THREE.TubeGeometry(extrudePath, segments, 100, radiusSegments, closed, debug);           
              tube.dynamic = true;
  
              tube.computeBoundingBox();
              console.log(tube);          
              tube.scale.x = tube.boundingBox.max.x;
              tube.scale.z = tube.boundingBox.max.z;
  </code></pre>
  
  <p><strong>Is there anyway to scale it properly or transform that bending portion into cylinder so that it looks like the straight portion of a tube ?</strong></p>