Parametric representation of a 2D line in terms of three parameters (a,b,c) (as in ax+by+c = 0). More...

#include <g_line.h>

Public Member Functions
	Line ()
	Constructor without initializations. More...

	Line (const kjb::Vector &point_1, const kjb::Vector &point_2)
	Constructor from two points on the line. More...

	Line (double a, double b, double c)
	Constructs a new Line_segment from line parameters a, b, c as in ax + by + c = 0. More...

	Line (const kjb::Vector &iparams)
	Constructs a new Line_segment from line parameters vector [a, b, c] as in ax + by + c = 0. More...

	Line (const Line &l)
	Copy constructor. More...

Line &	operator= (const Line &l)
	Assignment operator. More...

double	get_a () const
	Returns the a parameter of the line as in ax + by + c = 0. More...

double	get_b () const
	Returns the b parameter of the line as in ax + by + c = 0. More...

double	get_c () const
	Returns the c parameter of the line as in ax + by + c = 0. More...

const kjb::Vector &	get_params () const
	Returns the line parameters. More...

double	compute_y_coordinate (double ix)
	computes the y coordinate for the input x coordinate More...

void	set_a (double ia)
	Sets the a parameter of the line as in ax + by + c = 0. More...

void	set_b (double ib)
	Sets the b parameter of the line as in ax + by + c = 0. More...

void	set_c (double ic)
	Sets the c parameter of the line as in ax + by + c = 0. More...

void	set_line_params (const kjb::Vector &iparams)
	Sets the line parameters [a,b,c] of the line as in ax + by + c = 0. More...

bool	point_is_on_line (const Vector &point) const

double	find_distance_to_point (const kjb::Vector &point) const
	Finds the perpendicular distance between a line and a point. More...

Vector	project_point_onto_line (const Vector &point) const
	Project a point onto a line. More...

Static Public Member Functions
static bool	find_line_intersection (const Line &l1, const Line &l2, kjb::Vector &ints)
	Find the intersection between two lines, Returns false if the lines are parallel. More...

Detailed Description

Parametric representation of a 2D line in terms of three parameters (a,b,c) (as in ax+by+c = 0).

Constructor & Destructor Documentation

kjb::Line::Line ( )

inline

Constructor without initializations.

Line::Line	(	const kjb::Vector &	point_1,
		const kjb::Vector &	point_2
	)

Constructor from two points on the line.

Constructor from two points on the line

Parameters

point_1	The first point
point_2	The second point

kjb::Line::Line	(	double	a,
		double	b,
		double	c
	)

inline

Constructs a new Line_segment from line parameters a, b, c as in ax + by + c = 0.

kjb::Line::Line ( const kjb::Vector & iparams )

inline

Constructs a new Line_segment from line parameters vector [a, b, c] as in ax + by + c = 0.

kjb::Line::Line ( const Line & l )

inline

Copy constructor.

Member Function Documentation

double kjb::Line::compute_y_coordinate ( double ix )

inline

computes the y coordinate for the input x coordinate

double Line::find_distance_to_point ( const kjb::Vector & point ) const

Finds the perpendicular distance between a line and a point.

Finds the perpendicular distance between a line and a point

Parameters

point the point to compute the distance for

Returns: the distance between the line and the point

bool Line::find_line_intersection	(	const Line &	l1,
		const Line &	l2,
		kjb::Vector &	ints
	)

static

Find the intersection between two lines, Returns false if the lines are parallel.

Finds the intersection between two lines.

Parameters

l1	the first line
l2	the second line
ints	will store the intersection point

Returns: true if the lines intercept, false if thet are parallel

double kjb::Line::get_a ( ) const

inline

Returns the a parameter of the line as in ax + by + c = 0.

double kjb::Line::get_b ( ) const

inline

Returns the b parameter of the line as in ax + by + c = 0.

double kjb::Line::get_c ( ) const

inline

Returns the c parameter of the line as in ax + by + c = 0.

const kjb::Vector& kjb::Line::get_params ( ) const

inline

Returns the line parameters.

Line& kjb::Line::operator= ( const Line & l )

inline

Assignment operator.

bool kjb::Line::point_is_on_line ( const Vector & point ) const

inline

Vector Line::project_point_onto_line ( const Vector & point ) const

Project a point onto a line.

Returns: The projected point on the line

void kjb::Line::set_a ( double ia )

inline

Sets the a parameter of the line as in ax + by + c = 0.

void kjb::Line::set_b ( double ib )

inline

Sets the b parameter of the line as in ax + by + c = 0.

void kjb::Line::set_c ( double ic )

inline

Sets the c parameter of the line as in ax + by + c = 0.

void kjb::Line::set_line_params ( const kjb::Vector & iparams )

inline

Sets the line parameters [a,b,c] of the line as in ax + by + c = 0.

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

/work/kobus/src/lib/g_cpp/g_line.h
/work/kobus/src/lib/g_cpp/g_line.cpp

Public Member Functions

Static Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation