Line2 Class Reference

A Line2 is a line on XY-plane, and it is defined in slope-intercept form y = slope*x + y-intercept; for making operations easier. More...

Public Member Functions
	Line2 (double slope=0, double intcpt=0)
	Line2 (const Coord &, double slope)
	Line2 (const Coord &, const Coord &)
bool	operator== (const Line2 &) const
Coord	direction () const
Coord	closestPoint (const Coord &point) const
Coord	intersection (const Line2 &, bool checkinlimit=true) const
double	distanceTo (const Line2 &) const
bool	getParallelLine (Line2 &line, double dist) const
bool	getPerpendicularLine (Line2 &line, const Coord &pt) const
bool	isOnLine (const Coord &pt) const

Public Attributes
double	slope_
double	yintcpt_
bool	isvertical_
double	xintcpt_
Coord	start_
Coord	stop_

Detailed Description

A Line2 is a line on XY-plane, and it is defined in slope-intercept form y = slope*x + y-intercept; for making operations easier.

Constructor & Destructor Documentation

Line2::Line2	(	double	slope = 0,
		double	intcpt = 0
	)

Line2::Line2	(	const Coord &	,
		double	slope
	)

Line2::Line2	(	const Coord &	,
		const Coord &
	)

Member Function Documentation

Coord Line2::closestPoint

(

const Coord &

point

)

const

Returns

the point on the line that is closest to the given point

Coord Line2::direction

(

)

const

Normalized

double Line2::distanceTo

(

const Line2 &

)

const

Gives distance to another parallel line

bool Line2::getParallelLine	(	Line2 &	line,
		double	dist
	)		const

Gives a parallel line at a distance dist

bool Line2::getPerpendicularLine	(	Line2 &	line,
		const Coord &	pt
	)		const

Gives a perpendicular line through point pt

Coord Line2::intersection	(	const Line2 &	,
		bool	checkinlimit = true
	)		const

bool Line2::isOnLine

(

const Coord &

pt

)

const

bool Line2::operator==

(

const Line2 &

)

const

Member Data Documentation

bool Line2::isvertical_

Parallel to y-axis

double Line2::slope_

Coord Line2::start_

For line-segments only

Coord Line2::stop_

For line-segments only

double Line2::xintcpt_

only if isvertical_ true

double Line2::yintcpt_