FSegment seg = new FSegment(node.vennObject.getCenter(),rect.center());
Assert.assertNotNull( seg );
// Polygon intersection point
FPoint a, b;
a = ((VennPolygonObject)node.vennObject).getPolygon().intersect(seg);
b = rect.toPolygon().intersect(seg);
if( (a != null) && (b != null) )
{