|
2. It starts
in a point called the source of r and goes to infinity.
| Ray_2<Kernel> r ( Point_2<Kernel> p, Point_2<Kernel> q); | |
|
introduces a ray r
with source p and passing through point q.
| |
| Ray_2<Kernel> r ( Point_2<Kernel> p, Direction_2<Kernel> d); | |
|
introduces a ray r starting at source p with
direction d.
| |
| Ray_2<Kernel> r ( Point_2<Kernel> p, Vector_2<Kernel> v); | |
|
introduces a ray r starting at source p with
the direction of v.
| |
| Ray_2<Kernel> r ( Point_2<Kernel> p, Line_2<Kernel> l); | |
|
introduces a ray r starting at source p with
the same direction as l.
| |
| bool | r.operator== ( h) const | Test for equality: two rays are equal, iff they have the same source and the same direction. | ||
| bool | r.operator!= ( h) const | Test for inequality. | ||
| Point_2<Kernel> | r.source () const | returns the source of r. | ||
| Point_2<Kernel> | r.point ( int i) const |
returns a point on r. point(0) is the source,
point(i), with i>0, is different from the
source.
| ||
| Direction_2<Kernel> | r.direction () const | returns the direction of r. | ||
| Vector_2<Kernel> | r.to_vector () const | returns a vector giving the direction of r. | ||
| Line_2<Kernel> | r.supporting_line () const | returns the line supporting r which has the same direction. | ||
| Ray_2<Kernel> | r.opposite () const | returns the ray with the same source and the opposite direction. |
| bool | r.is_degenerate () const | ray r is degenerate, if the source and the second defining point fall together (that is if the direction is degenerate). | ||
| bool | r.is_horizontal () const | |||
| bool | r.is_vertical () const | |||
| bool | r.has_on ( Point_2<Kernel> p) const | |||
| A point is on r, iff it is equal to the source of r, or if it is in the interior of r. | ||||
| bool | r.collinear_has_on ( Point_2<Kernel> p) const | |||
checks if point p is on r. This function is faster
than function has_on() if the precondition
checking is disabled.
| ||||
| Ray_2<Kernel> | r.transform ( Aff_transformation_2<Kernel> t) const | |
| returns the ray obtained by applying t on the source and on the direction of r. | ||