Kernel::ConstructVector_2

Kernel::Vector_2	fo.operator() ( Kernel::Point_2 a, Kernel::Point_2 b)
		introduces the vector $$b-a.
Kernel::Vector_2	fo.operator() ( Origin o, Kernel::Point_2 b)
		introduces the vector $$b.
Kernel::Vector_2	fo.operator() ( Kernel::Point_2 a, Origin o)
		introduces the vector $$-a.
Kernel::Vector_2	fo.operator() ( Kernel::Segment_2 s)
		introduces the vector $$s.target()-s.source().
Kernel::Vector_2	fo.operator() ( Kernel::Ray_2 r)
		introduces a vector having the same direction as $$r.
Kernel::Vector_2	fo.operator() ( Kernel::Line_2 l)
		introduces a vector having the same direction as $$l.
Kernel::Vector_2	fo.operator() ( Null_vector NULL_VECTOR)
		introduces a null vector .

Refines

See Also