Function lineSegmentIntersects

lineSegmentIntersects(a, b, c, d): boolean
Quickly test whether the line segment AB intersects with the line segment CD. This method does not determine the point of intersection, for that use lineLineIntersection.
Parameters
- a: Point
  The first endpoint of segment AB
- b: Point
  The second endpoint of segment AB
- c: Point
  The first endpoint of segment CD
- d: Point
  The second endpoint of segment CD
Returns boolean
Do the line segments intersect?