Version 5.0 The LEDA User Manual

ool l.project(const d3 point& p, const d3 point& q, const d3 point& v,
d3 line& m)
if the projection of l into the plane through (p, q, v)
is not a point, the function returns true and assignes
the projection to m. Otherwise false is returned.
d3 line
l.translate(double dx, double dy, double dz)
returns l translated by vector (dx, dy, dz).
d3 line l.translate(const vector& v)
returns l translated by v.
Precond. : v.dim( ) = 3.
d3 line l + const vector& v returns l translated by vector v.
d3 line l − const vector& v returns l translated by vector −v.
d3 line l.reflect(const d3 point& p, const d3 point& q, const d3 point& v)
d3 line l.reflect(const d3 point& p)
returns l reflected across the plane through (p, q, v).
returns l reflected across point p.
d3 line l.reverse( ) returns l reversed.
vector l.to vector( ) returns point2 ( ) − point1 ( ).
bool l.intersection(const d3 segment& s)
decides, whether l and s intersect in a single point.
bool l.intersection(const d3 segment& s, d3 point& p)
bool l.intersection(const d3 line& m)
decides, whether l and s intersect in a single point. If
so, the point of intersection is assigned to p.
decides, whether l and m intersect.
bool l.intersection(const d3 line& m, d3 point& p)
double l.sqr dist(const d3 point& p)
double l.distance(const d3 point& p)
decides, whether l and m intersect in a single point.
If so, the point of intersection is assigned to p.
returns the square of the distance between l and p.
returns the distance between l and p.