title: glm::vec3 and epsilon comparison
body: <p>I want to check if a <code>glm::vec3</code> is equal to a zero vector <code>glm::vec3(0,0,0)</code>.</p>
  
  <p>Until now I was writing</p>
  
  <pre><code>if(v == glm::vec3(0,0,0))
      ...
  </code></pre>
  
  <p>But then I learned about epsilon, so my question is if there's a faster (more readable) way to do this check than to explicitly compare like so:</p>
  
  <pre><code>if(abs(v.x) &lt; EPSILON &amp;&amp; abs(v.y) &lt; EPSILON &amp;&amp; abs(v.z) &lt; EPSILON)
      ...
  </code></pre>