Version 5.0 The LEDA User Manual

segment s.project xy( ) returns the projection into the xy plane.
segment s.project xz( ) returns the projection into the xz plane.
segment s.project yz( ) returns the projection into the yz plane.
d3 segment s.project(const d3 point& p, const d3 point& q, const d3 point& v)
returns s projected into the plane through (p, q, v).
d3 segment s.reflect(const d3 point& p, const d3 point& q, const d3 point& v)
d3 segment s.reflect(const d3 point& p)
returns s reflected across the plane through (p, q, v).
returns s reflected across point p.
d3 segment s.reverse( ) returns s reversed.
vector s.to vector( ) returns s.target( ) − s.source( ).
bool s.intersection(const d3 segment& t)
decides, whether s and t intersect in a single point.
bool s.intersection(const d3 segment& t, d3 point& p)
decides, whether s and t intersect in a single point. If
they intersect in a single point, the point is assigned
to p and the result is true, otherwise the result is false
bool s.intersection of lines(const d3 segment& t, d3 point& p)
bool s.is trivial( ) returns true if s is trivial.
If line(s) and line(t) intersect in a single point this
point is assigned to p and the result is true, otherwise
the result is false.
double s.sqr length( ) returns the square of the length of s.
double s.length( ) returns the length of s.
d3 segment s.translate(const vector& v)
returns s translated by vector v.
Precond. : v.dim( ) = 3.
d3 segment
s.translate(double dx, double dy, double dz)
returns s translated by vector (dx, dy, dz).
d3 segment s + const vector& v returns s translated by vector v.
d3 segment s − const vector& v returns s translated by vector −v.