title: Occlusion Culling for Grid Aligned Cells
body: <p>Given:</p>
  <ol>
  <li>A 3d, axis aligned grid of cells with side length L.</li>
  <li>A plane with start position, side L and a axis aligned normal;</li>
  <li>A arbitrary positioned/rotated camera with variable vertical field of view</li>
  </ol>
  <p><strong>I need to check what cells lies completely behind the plane</strong></p>
  <p>Desired Result:</p>
  <ul>
  <li><a href="https://i.stack.imgur.com/eWds8.png" rel="nofollow noreferrer">Side View</a></li>
  <li><a href="https://i.stack.imgur.com/E8xvj.png" rel="nofollow noreferrer">Camera View</a></li>
  </ul>
  <p>I don't know if it is relevant, but in my case, the plane start/end components will always be aligned with the grid, with exception of the component its normal is pointing to; The exemple images show a plane with normal (0, 0, -1) so the x and y components are aligned, but not z;</p>