Version 5.0 The LEDA User Manual

eal vector v.norm( )
returns v normalized.
real 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
real vector v + const real vector& v1
real vector v − const real vector& v1
Addition.
Precondition: v.dim() = v1.dim().
Subtraction.
Precondition: v.dim() = v1.dim().
real v ∗ const real vector& v1 Scalar multiplication.
Precondition: v.dim() = v1.dim().
real vector v ∗ real r Componentwise multiplication with real r.
bool
v == const real vector& w Test for equality.
bool v != const real 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&
istream&
ostream& O ≪ const real vector& v
writes v componentwise to the output stream O.
istream& I ≫ real vector& v
reads v componentwise from the input stream I.
vector v.to float( ) returns a floating point approximation of v.
Additional Operations for vectors in two and three-dimensional space
real v.xcoord( ) returns the zero-th cartesian coordinate of v.
real v.ycoord( ) returns the first cartesian coordinate of v.
real v.zcoord( ) returns the second cartesian coordinate of v.