title: How to convert a 3D point on a plane to UV coordinates?
body: <p>I have a 3d point, defined by <code>[x0, y0, z0]</code>.</p>
  
  <p>This point belongs to a plane, defined by <code>[a, b, c, d]</code>.</p>
  
  <p><code>normal</code> = <code>[a, b, c]</code>, and <code>ax + by + cz + d = 0</code></p>
  
  <p>How can convert or map the 3d point to a pair of <code>(u,v)</code> coordinates ?</p>
  
  <p>This must be something really simple, but I can't figure it out.</p>