Integer Line Segments ( ISegment )

Definition

An instance is of type ISegment is a line segment [p, q], where p and q are integer points. We call p the source point and q the target point of the segment.

#include < AGD/ISegment.h >

Creation

ISegment	is	creates an instance is of type ISegment initialized to the segment [(0, 0),(0, 0)].
ISegment	is(const IPoint& p, const IPoint& q)
		creates an instance is of type ISegment initialized to the segment [p, q].

Operations

const IPoint&	is.source()	returns a reference to the source point of is.
const IPoint&	is.target()	returns a reference to the target point of is.
bool	is.horizontal()	returns true iff is is horizontal, i.e the y-coordinate of the source point equals the y-coordinate of the target point.
bool	is.vertical()	returns true iff is is vertical, i.e the x-coordinate of the source point equals the x-coordinate of the target point.