anchor.diff:  
   *Example*
   ----
  +threeB.point_inclusion.check_poly(50, 100, [20, 50, 60, 40, 30], [20, 40, 70, 120, 30]}
   ----
   
   
  
positive.code: There should always be an even number of x,y pairs meaning the length of the vertx and verty arrays should be the same.
  The format of the vertx and verty arrays is: [x1, x2, x3, x4, ...] [y1, y2, y3, y4, ...].
  
  The 'check' function will accept 2 forms of vertex information.  The first is the one described above using the two
  vertx and verty keys in the area_obj.  The second form is a single array similar to the coords array used by the 'rect'
  shape.  In this case the single array must contain both the x and y values in the form: [x1, y1, x2, y2, x3, y3, ...].
  
  Internally the check function will convert the single coords array into a vertx and verty array in order to speed up
  the polygon hit test.
  
  An option key of 'bbox' is allowed to help speed up the hit test on a polygon.  The format of this 'bbox' parameter is
  identical to the coords array used by the 'rect' shape.  Providing a 'bbox' parameter is HIGHLY recommended in order to
  improve performance when testing against a polygon.
  
negative.code: 
  *Example*
  ----
  threeB.point_inclusion.check(50, 100, {shape: "circle", coords: [40, 40, 50]});
  ----
  
  
  