Version 5.0 The LEDA User Manual

14.9 Iso-oriented Rectangles ( rectangle )
1. Definition
An instance r of the data type rectangle is an iso-oriented rectangle in the two-dimensional
plane.
#include < LEDA/geo/rectangle.h >
2. Creation
rectangle r(const point& p, const point& q);
introduces a variable r of type rectangle.
rectangle with diagonal corners p and q
r is initialized to the
rectangle r(const point& p, double w, double h);
introduces a variable r of type rectangle. r is initialized to the
rectangle with lower left corner p, width w and height h.
rectangle r(double x1 , double y1 , double x2 , double y2 );
introduces a variable r of type rectangle. r is initialized to the
rectangle with diagonal corners (x1 , y1 ) and (x2 , y2 ).
3. Operations
point r.upper left( ) returns the upper left corner.
point r.upper right( ) returns the upper right corner.
point r.lower left( ) returns the lower left corner.
point r.lower right( ) returns the lower right corner.
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.
double r.xmin( ) returns the minimal x-coordinate of r.
double r.xmax( ) returns the maximal x-coordinate of r.
double r.ymin( ) returns the minimal y-coordinate of r.
double r.ymax( ) returns the maximal y-coordinate of r.
double r.width( ) returns the width of r.