Version 5.0 The LEDA User Manual

eal rectangle r.translate(real dx, real dy)
real rectangle r.translate(const real vector& v)
real rectangle r + const real vector& v
real rectangle r − const real vector& v
returns a new rectangle that is the translation of
r by (dx, dy).
returns a new rectangle that is the translation of
r by v.
returns r translated by v.
returns r translated by −v.
real point r[int i] returns the i − th vertex of r. Precondition: (0 <
i < 5).
real rectangle r.rotate90(const real point& p, int i = 1)
returns r rotated about p by an angle of i × 90
degrees. If i > 0 the rotation is counter-clockwise
otherwise it is clockwise.
real rectangle r.rotate90(int i = 1)
returns r rotated by an angle of i × 90 degrees
about the origin.
real rectangle r.reflect(const real point& p)
returns r reflected across p .
list r.intersection(const real segment& s)
returns r ∩ s .
bool r.clip(const real segment& t, real segment& inter)
clips t on r and returns the result in inter.
bool
bool
r.clip(const real line& l, real segment& inter)
clips l on r and returns the result in inter.
r.clip(const real ray& ry, real segment& inter)
clips ry on r and returns the result in inter.
bool r.difference(const real rectangle& q, list& L)
returns true iff the difference of r and q is not
empty, and false otherwise. The difference L is
returned as a partition into rectangles.
list r.intersection(const real line& l)
returns r ∩ l.