title: How to form a shape out of horizontal line grid? With Processing?
body: <p>I was wondering how to achieve a similar effect like the shape of the letter "A" coming out of a horizontal line grid (see picture attached).
  Does somebody know how to find a tutorial? How is this technique called? Can you do it with Processing? Or do you need a 3D program?</p>
  
  <p>Any hint is very welcome!</p>
  
  <p><a href="https://i.stack.imgur.com/W4uRh.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/W4uRh.jpg" alt="horizontal line grid, letter A"></a></p>