title: XNA line segment intersection?
body: <p>Lets say we have 4 <code>Vector2</code>'s (yes this is 2d), so we have lineOneStart, lineOneEnd, lineTwoStart and lineTwoEnd.</p>
  
  <p>How can I detect if the 2 lines cross? I don't care where they cross, I just want to know if they intersect.</p>