Version 5.0 The LEDA User Manual

14.23 Iso-oriented Real Rectangles ( real rectangle )
1. Definition
An instance r of the data type real rectangle is an iso-oriented rectangle in the twodimensional
plane.
#include < LEDA/geo/real rectangle.h >
2. Creation
real rectangle r(const real point& p, const real point& q);
introduces a variable r of type real rectangle. r is initialized to the
real rectangle with diagonal corners p and q
real rectangle r(const real point& p, real w, real h);
introduces a variable r of type real rectangle. r is initialized to the
real rectangle with lower left corner p, width w and height h.
real rectangle r(real x1 , real y1 , real x2 , real y2 );
introduces a variable r of type real rectangle. r is initialized to the
real rectangle with diagonal corners (x1 , y1 ) and (x2 , y2 ).
real rectangle r(const rectangle& r1 , int prec = 0);
real rectangle r(const rat rectangle& r1 );
3. Operations
introduces a variable r of type real rectangle initialized to the
rectangle r 1 . (The second argument is for compatibility with
rat rectangle.)
introduces a variable r of type real rectangle initialized to the rectangle
r 1 .
real point r.upper left( ) returns the upper left corner.
real point r.upper right( ) returns the upper right corner.
real point r.lower left( ) returns the lower left corner.
real point r.lower right( ) returns the lower right corner.
real point r.center( ) returns the center of r.
list r.vertices( )
returns the vertices of r in counterclockwise order
starting from the lower left point.