Version 5.0 The LEDA User Manual

circle C(const circle& c, int);
4. Operations
introduces a variable C of type circle. C is initialized to a
copy of c. The second argument is for compatability with
rat circle.
point C.center( ) returns the center of C.
Precondition: The orientation of C is not 0.
double C.radius( ) returns the radius of C.
Precondition: The orientation of C is not 0.
double C.sqr radius( ) returns the squared radius of C.
Precondition: The orientation of C is not 0.
point C.point1( ) returns p 1 .
point C.point2( ) returns p 2 .
point C.point3( ) returns p 3 .
point C.point on circle(double alpha, double = 0)
returns a point p on C with angle of alpha.
The second argument is for compatability with
rat circle.
bool C.is degenerate( ) returns true if the defining points are collinear.
bool C.is trivial( ) returns true if C has radius zero.
int C.orientation( ) returns the orientation of C.
int C.side of(const point& p) returns −1, +1, or 0 if p lies right of, left of, or on
C respectively.
bool C.inside(const point& p) returns true iff p lies inside of C.
bool C.outside(const point& p) returns true iff p lies outside of C.
bool C.contains(const point& p)
circle C.translate by angle(double a, double d)
returns true iff p lies on C.
returns C translated in direction a by distance d.
circle
C.translate(double dx, double dy)
returns C translated by vector (dx, dy).
circle C.translate(const vector& v)
returns C translated by vector v.