title: Basic geometry in Clojure
body: <p>I'm looking for a Clojure library to do some basic geometry, such as:</p>
  
  <ul>
  <li>Calculating the slope of a line given its starting and ending coordinates</li>
  <li>Given a line with a known slope, and an x value, calculating the y value (and calculating x given y)</li>
  </ul>
  
  <p>I can write these quite easily, given the mathematical definitions of the equations, but it seems a shame to do so if there is a decent library out there that does this already.</p>
  
  <p>Note that I don't need to plot things graphically and so on, so a library that introduces a lot of graphical dependencies is not really welcome.</p>