title: Creating a spline curve between 2 points in Three.js
body: <p>I'm trying to link points with a spline using Three.js for a visualization I'm trying to make.</p>
  
  <p>As far as I can tell, I add points to an array, pass that to THREE.SplineCurve3, step through the spline points to get the geom coords and render.  It works if I only add the start/end points to the array but if I try to add a mid-point, I get an error.</p>
  
  <p>Example is here:</p>
  
  <p><a href="http://jsfiddle.net/sLQK9/4/" rel="noreferrer">http://jsfiddle.net/sLQK9/4/</a></p>
  
  <p>I'm sure it's something simple but I can't spot it - can anyone help me?</p>
  
  <p>Ultimately, the points will be on the surface of a sphere and the splines between 2 points will take the route an aircraft would take - I.E. sort of great circle but further away from the center of the sphere at the midpoint of the spline.</p>
  
  <p>Many thanks in advance.</p>