title: Fill UIBezierPath with parallel lines
body: <p>I'm trying to draw custom shape using UIBezierPath: </p>
  
  <pre><code>UIBezierPath *aPath = [UIBezierPath bezierPath];
  
      [aPath moveToPoint:CGPointMake(100.0, 0.0)];
  
      // Draw the lines.
      [aPath addLineToPoint:CGPointMake(200.0, 40.0)];
      [aPath addLineToPoint:CGPointMake(160, 140)];
      [aPath addLineToPoint:CGPointMake(40.0, 140)];
      [aPath addLineToPoint:CGPointMake(0.0, 40.0)];
      [aPath closePath];
  </code></pre>
  
  <p>I want to fill it with parallel lines to make this stripped. I want to change color of this lines too.
  Assume that I want to make them vertical.
  I have to calculate somehow points on this path with regular interval, how I can do this?</p>
  
  <p>I have found this UIColor colorWithPatternImage but then i cant change color and "density" of my lines inside shape.</p>