Version 5.0 The LEDA User Manual

vector v.rotate90(int i = 1) returns v by an angle of i × 90 degrees. If i >
0 the rotation is counter-clockwise otherwise it is
clockwise. Precondition: v.dim() = 2
vector v.rotate(double a) returns the v rotated counterclockwise by an angle
of a (in radian).
Precondition: v.dim() = 2
vector& v += const vector& v1 Addition and assign.
Precondition: v.dim() = v1.dim().
vector& v −= const vector& v1 Subtraction and assign.
Precondition: v.dim() = v1.dim().
vector v + const vector& v1 Addition.
Precondition: v.dim() = v1.dim().
vector v − const vector& v1 Subtraction.
Precondition: v.dim() = v1.dim().
double v ∗ const vector& v1 Scalar multiplication.
Precondition: v.dim() = v1.dim().
vector v ∗ double r Componentwise multiplication with double r.
vector v / double r Componentwise division which double r.
bool v == const vector& w Test for equality.
bool v != const vector& w Test for inequality.
void v.print(ostream& O) prints v componentwise to ostream O.
void v.print( ) prints v to cout.
void v.read(istream& I) reads d = v.dim( ) numbers from input stream I
and writes them into v[0] . . . v[d − 1].
void v.read( ) reads v from cin.
ostream&
ostream& O ≪ const vector& v
writes v componentwise to the output stream O.
istream& istream& I ≫ vector& v reads v componentwise from the input stream I.
Additional Operations for vectors in two and three-dimensional space
double v.xcoord( ) returns the zero-th cartesian coordinate of v.
double v.ycoord( ) returns the first cartesian coordinate of v.