Version 5.0 The LEDA User Manual

void
void
void
W.draw segment(const segment& s, color c = window :: fgcol)
draws line segment s.
W.draw segment(point p, point q, line l, color c = window :: fgcol)
draws the part of the line l between p and q. This version
of draw segment should be used if p or q may lie far outside
W . Precondition: p and q lie on l or at least close to l.
W.draw segments(const list& L, color c = window :: fgcol)
draws all segments in L.
3.4.3 Drawing lines
void
void
void
void
void
void
W.draw line(double x 1 , double y 1 , double x 2 , double y 2 , color c = window :: fgcol)
draws a straight line passing through points (x 1 , y 1 ) and
(x 2 , y 2 ).
W.draw line(const point& p, const point& q, color c = window :: fgcol)
draws a straight line passing through points p and q.
W.draw line(const segment& s, color c = window :: fgcol)
draws the line supporting segment s.
W.draw line(const line& l, color c = window :: fgcol)
draws line l.
W.draw hline(double y, color c = window :: fgcol)
draws a horizontal line with y-coordinate y.
W.draw vline(double x, color c = window :: fgcol)
draws a vertical line with x-coordinate x.
3.4.4 Drawing Rays
void
void
void
void
W.draw ray(double x 1 , double y 1 , double x 2 , double y 2 , color c = window :: fgcol)
draws a ray starting in (x 1 , y 1 ) and passing through
(x 2 , y 2 ).
W.draw ray(const point& p, const point& q, color c = window :: fgcol)
draws a ray starting in p and passing through q.
W.draw ray(const segment& s, color c = window :: fgcol)
draws a ray starting in s.source() containing s.
W.draw ray(const ray& r, color c = window :: fgcol)
draws ray r.