Version 5.0 The LEDA User Manual

14.17 Real Points ( real point )
1. Definition
An instance of the data type real point is a point in the two-dimensional plane R 2 . We use
(x, y) to denote a real point with first (or x-) coordinate x and second (or y-) coordinate
y.
#include < LEDA/geo/real point.h >
2. Types
real point :: coord type
real point :: point type
real point :: float type
the coordinate type (real).
the point type (real point).
the corresponding floating-point type (point).
3. Creation
real point p; introduces a variable p of type real point initialized to the
point (0, 0).
real point
p(real x, real y);
introduces a variable p of type real point initialized to the
point (x, y).
real point p(const point& p1 , int prec = 0);
real point p(const rat point& p1 );
introduces a variable p of type real point initialized to the
point p 1 . (The second argument is for compatibility with
rat point.)
introduces a variable p of type real point initialized to the
point p 1 .
real point
p(double x, double y);
introduces a variable p of type real point initialized to the real
point (x, y).
4. Operations
real p.xcoord( ) returns the first coordinate of p.
real p.ycoord( ) returns the second coordinate of p.