title: How to "flatten" or "index" 3D-array in 1D array?
body: <p>I am trying to flatten 3D array into 1D array for "chunk" system in my game. It's a 3D-block game and basically I want the chunk system to be almost identical to Minecraft's system (however, this isn't Minecraft clone by any measure). In my previous 2D-games I have accessed the flattened array with following algorithm:</p>
  
  <pre><code>Tiles[x + y * WIDTH]
  </code></pre>
  
  <p>However, this obviously doesn't work with 3D since it's missing the Z-axis. I have no idea how to implement this sort of algorithm in 3D-space. Width, height and depth are all constants (and width is just as large as height).</p>
  
  <p>Is it just <code>x + y*WIDTH + Z*DEPTH</code> ? I am pretty bad with math and I am just beginning 3D-programming so I am pretty lost :|</p>
  
  <p>PS. The reason for this is that I am looping and getting stuff by index from it quite a lot. I know that 1D arrays are faster than multi-dimensional arrays (for reasons I cant remember :P ). Even though this may not be necessary, I want as good performance as possible :)</p>