title: How to calculate area of an organic shape?
body: <p>I want to know its possible to calculate the area of an organic shape. The shape im trying to calculate looks something like this: <img src="https://i.stack.imgur.com/89XmD.jpg" alt=""> </p>
  
  <p>Imagine its drawn by <code>CGPoints</code></p>
  
  <p>Is there a special function for this? Im thinking maybe CoreImage or Quartz or maybe opengl.</p>