#include <line2d.h>

Inheritance diagram for tuw::Line2D:

Public Member Functions
double &	a ()

const double &	a () const

double &	b ()

const double &	b () const

double &	c ()

const double &	c () const

cv::Vec< double, 3 > &	cv ()

const cv::Vec< double, 3 > &	cv () const

double	distanceTo (const double &x, const double &y) const

double	distanceTo (const Point2D &p) const

Point2D	intersection (const Line2D &l) const

	Line2D ()
	constructor More...

	Line2D (const Line2D &l)

	Line2D (cv::Vec< double, 3 > &l, bool normalize=true)

	Line2D (const double &x0, const double &y0, const double &x1, const double &y1, bool normalize=true)

	Line2D (const Point2D &pt1, const Point2D &pt2, bool normalize=true)

cv::Vec< double, 2 >	normal () const

void	normalize ()

Point2D	pointOnLine (const double &x, const double &y) const

Point2D	pointOnLine (const Point2D &p) const

Line2D &	set (const double &x0, const double &y0, const double &x1, const double &y1, bool normalize=true)

Line2D &	set (const Point2D &p0, const Point2D &p1, bool normalize=true)

Polar2D	toPolar () const

Friends
std::ostream &	operator<< (std::ostream &os, const Line2D &o)

Detailed Description

class to represent a 2D line as equation a*x + b*y + c = 0 The line has no endpoints

Definition at line 16 of file line2d.h.

Constructor & Destructor Documentation

Line2D::Line2D ( )

constructor

Definition at line 5 of file line2d.cpp.

Line2D::Line2D ( const Line2D & l )

copy constructor

Parameters

l equation

Definition at line 7 of file line2d.cpp.

Line2D::Line2D	(	cv::Vec< double, 3 > &	l,
		bool	normalize = `true`
	)

constructor with optional normalization

Parameters

l	equation
normalize	normalizes equation on true

Definition at line 9 of file line2d.cpp.

Line2D::Line2D	(	const double &	x0,
		const double &	y0,
		const double &	x1,
		const double &	y1,
		bool	normalize = `true`
	)

constructor to create a line from points

Parameters

x0
y0
x1
y1
normalize	normalizes equation on true

Definition at line 13 of file line2d.cpp.

Line2D::Line2D	(	const Point2D &	pt1,
		const Point2D &	pt2,
		bool	normalize = `true`
	)

constructor to create a line from points

Parameters

pt1
pt2
normalize	normalizes equation on true

Definition at line 16 of file line2d.cpp.

Member Function Documentation

double & Line2D::a ( )

Returns: the first equation component for x

Definition at line 19 of file line2d.cpp.

const double & Line2D::a ( ) const

Returns: the first equation component for x

Definition at line 22 of file line2d.cpp.

double & Line2D::b ( )

Returns: the second equation component for y

Definition at line 25 of file line2d.cpp.

const double & Line2D::b ( ) const

Returns: the second equation component for y

Definition at line 28 of file line2d.cpp.

double & Line2D::c ( )

Returns: the third equation component

Definition at line 31 of file line2d.cpp.

const double & Line2D::c ( ) const

Returns: the third equation component

Definition at line 34 of file line2d.cpp.

cv::Vec< double, 3 > & Line2D::cv ( )

returns the corresponding opencv vector

Returns: cv vector

Definition at line 72 of file line2d.cpp.

const cv::Vec< double, 3 > & Line2D::cv ( ) const

returns the corresponding opencv vector

Returns: cv vector

Definition at line 75 of file line2d.cpp.

double Line2D::distanceTo	(	const double &	x,
		const double &	y
	)		const

computes the distance to a point

Parameters

x
y

Returns: the minimal distance to a point

Precondition: normalize

Definition at line 41 of file line2d.cpp.

double Line2D::distanceTo ( const Point2D & p ) const

computes the distance to a point

Parameters

p

Returns: the minimal distance to a point

Precondition: normalize; normalize

Definition at line 45 of file line2d.cpp.

Point2D Line2D::intersection ( const Line2D & l ) const

computes the intersection point of two lines

Parameters

l

Returns: point on line

Precondition: normalize

Definition at line 57 of file line2d.cpp.

cv::Vec< double, 2 > Line2D::normal ( ) const

restuns the normal vector to a line

Returns: vector

Definition at line 61 of file line2d.cpp.

void Line2D::normalize ( )

normalizes the equation to a*a + b*b = 1

Definition at line 37 of file line2d.cpp.

Point2D Line2D::pointOnLine	(	const double &	x,
		const double &	y
	)		const

computes a point on the line with the shortest distance to the point given

Parameters

x
y

Returns: point on line

Precondition: normalize; pointOnLine

Definition at line 49 of file line2d.cpp.

Point2D Line2D::pointOnLine ( const Point2D & p ) const

computes a point on the line with the shortest distance to the point given

Parameters

p

Returns: point on line

Precondition: normalize; pointOnLine

Definition at line 54 of file line2d.cpp.

Line2D & Line2D::set	(	const double &	x0,
		const double &	y0,
		const double &	x1,
		const double &	y1,
		bool	normalize = `true`
	)

constructor to create a line from points

Parameters

x0
y0
x1
y1
normalize	normalizes equation on true

Returns: ref to this

cross product with homogenios vectors

Definition at line 64 of file line2d.cpp.

Line2D & Line2D::set	(	const Point2D &	p0,
		const Point2D &	p1,
		bool	normalize = `true`
	)

constructor to create a line from points

Parameters

p0
p1
normalize	normalizes equation on true

Returns: ref to this

Definition at line 69 of file line2d.cpp.

Polar2D Line2D::toPolar ( ) const

converts the line into polar coordinates

Returns: Polar2D

Definition at line 78 of file line2d.cpp.

Friends And Related Function Documentation

std::ostream& operator<<	(	std::ostream &	os,
		const Line2D &	o
	)

friend

Definition at line 152 of file line2d.h.

The documentation for this class was generated from the following files:

Public Member Functions

Friends

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation