title: Finding CGPoint by adding into distance of two CGPoints
body: <p>I have two CGPoints A and B. Distance between A and B can be found with ccpDistance(A,B). </p>
  
  <p>With this information, I need to find programmatically CGPoint(x,y) of X by adding small distance into distance of A-B. A-B may can make a connecting line in horizontal, vertical, diagonal or any orientation. Purpose is to extend the imaginary line and find a point at the end of it. </p>
  
  <p>Is it possible in Box2D for iOS? If Yes, then how?</p>
  
  <pre><code>          X            Y   X
           /               .  \ 
          /                  . \
         B                     .B
        /                        \
       /                          \
      /                            \
     /                              \
    A                                A
  </code></pre>