Version 5.0 The LEDA User Manual

circle C + const vector& v returns C translated by vector v.
circle C − const vector& v returns C translated by vector −v.
circle C.rotate(const point& q, double a)
returns C rotated about point q by angle a.
circle C.rotate(double a) returns C rotated about the origin by angle a.
circle C.rotate90(const point& q, int i = 1)
circle C.reflect(const point& p, const point& q)
returns C rotated about q by an angle of i × 90
degrees. If i > 0 the rotation is counter-clockwise
otherwise it is clockwise.
returns C reflected across the straight line passing
through p and q.
circle C.reflect(const point& p) returns C reflected across point p.
circle C.reverse( ) returns C reversed.
list C.intersection(const circle& D)
list C.intersection(const line& l)
list C.intersection(const segment& s)
segment C.left tangent(const point& p)
segment C.right tangent(const point& p)
double C.distance(const point& p)
returns C ∩ D as a list of points.
returns C ∩ l as a list of (zero, one, or two) points
sorted along l.
returns C ∩ s as a list of (zero, one, or two) points
sorted along s.
returns the line segment starting in p tangent to
C and left of segment [p, C.center()].
returns the line segment starting in p tangent to
C and right of segment [p, C.center()].
returns the distance between C and p.
double C.sqr dist(const point& p) returns the squared distance between C and p.
double C.distance(const line& l) returns the distance between C and l.