core/vgl/vgl_line_2d.h File Reference

#include <vcl_iosfwd.h>
#include <vcl_cassert.h>
#include <vgl/vgl_fwd.h>
#include <vgl/vgl_vector_2d.h>

Go to the source code of this file.

Classes
class	vgl_line_2d< Type >
	Represents a Euclidean 2D line. More...
Defines
#define	l   vgl_line_2d<Type>
#define	VGL_LINE_2D_INSTANTIATE(T)   extern "please include vgl/vgl_line_2d.txx first"
Functions
template<class Type >
bool	is_ideal (l const &, Type=(Type) 0)
	Return true iff line is the line at infinity.
template<class Type >
bool	concurrent (l const &l1, l const &l2, l const &l3)
	Are three lines concurrent, i.e., do they pass through a common point?.
template<class Type >
vcl_ostream &	operator<< (vcl_ostream &s, l const &line)
	Write line description to stream: "<vgl_line_2d ax+by+c>".
template<class Type >
vcl_istream &	operator>> (vcl_istream &s, l &line)
	Read in three line parameters from stream.

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Detailed Description

Author:

Don Hamilton, Peter Tu, Peter Vanroose, François BERTEL, Franck Bettinger

Date:

2000-02-16 Don HAMILTON, Peter TU - Creation

    Modifications
     2000-02-29 Peter Vanroose    Several minor fixes
     2000-05-05 François BERTEL   Several minor bugs fixed
     2000-05-09 Peter Vanroose    dist_origin() re-implemented
     2000-12-01 Peter Vanroose    moved dist_origin() to vgl_distance.h
     2001-03-19 Franck Bettinger  added Manchester binary IO code
     2001-06-27 Peter Vanroose    Added operator==
     2001-07-05 Peter Vanroose    direction, normal in terms of vgl_vector_2d
     2001-07-06 Peter Vanroose    Added concurrent(), added assertions
     2009-05-21 Peter Vanroose    istream operator>> re-implemented
   

Definition in file vgl_line_2d.h.

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Define Documentation

#define l   vgl_line_2d<Type>

Definition at line 130 of file vgl_line_2d.h.

#define VGL_LINE_2D_INSTANTIATE

(

T

)

extern "please include vgl/vgl_line_2d.txx first"

Definition at line 163 of file vgl_line_2d.h.

---

Function Documentation

template<class Type >

bool concurrent	(	l const &	l1,
		l const &	l2,
		l const &	l3
	)		[inline]

Are three lines concurrent, i.e., do they pass through a common point?.

Definition at line 140 of file vgl_line_2d.h.

template<class Type >

bool is_ideal	(	l const &	,
		Type	= (Type)0
	)		[inline]

Return true iff line is the line at infinity.

Definition at line 135 of file vgl_line_2d.h.

template<class Type >

vcl_ostream& operator<<	(	vcl_ostream &	s,
		l const &	line
	)

Write line description to stream: "<vgl_line_2d ax+by+c>".

template<class Type >

vcl_istream& operator>>	(	vcl_istream &	s,
		l &	line
	)

Read in three line parameters from stream.

Either just reads three blank-separated numbers, or reads three comma-separated numbers, or reads three numbers in parenthesized form "(123, 321, -456)" or reads a formatted line equation "123x+321y-456=0"