bool

fo.operator() ( Kernel::Ray_2 r, Kernel::Point_2 p)

 
checks if point $$p is on $$r.
Precondition:  $$p is on the supporting line of $$r. 


bool

fo.operator() ( Kernel::Segment_2 s, Kernel::Point_2 p)

 
checks if point $$p is on $$s.
Precondition:  $$p is on the supporting line of $$s. 
