title: Coherent Spherical Noise?
body: <p>Does anyone know how I might be able to generate the following kind of noise?</p>
  
  <ul>
  <li>Three inputs, three outputs</li>
  <li>The outputs must always result in a vector of the same magnitude</li>
  <li>If it receives the same input as some other time, it must return the same output</li>
  <li>It must be continuous (best if it appears smooth, like perlin noise)</li>
  <li>It must appear to be fairly random</li>
  </ul>
  
  <p>EDIT: It would also be nice if it were isotropic, but that's not entirely necessary.</p>