Line_2< T > Class Template Reference

A line in 2-D. More...

#include <Line_2.h>

List of all members.

Public Types
typedef T	Number
	The number type.
typedef SegmentMath< 2, T >	Segment
	The segment upon which this line is built.
typedef Segment::Point	Point
	The point type.
Public Member Functions
Constructors etc.
	Line_2 ()
	Default constructor. Uninitialized memory.
	Line_2 (const Point &source, const Point &target)
	Construct from points.
void	make (const Point &source, const Point &target)
	Make from points.
	Line_2 (const Segment &segment)
	Construct from a segment.
	Line_2 (const geom::Segment< 2, Number > &segment)
	Construct from a Segment<2,Number>.
	Line_2 (const Line_2 &other)
	Copy constructor.
Line_2 &	operator= (const Line_2 &other)
	Assignment operator.
	~Line_2 ()
	Trivial destructor.
Accesors.
const Point &	getPointOn () const
	Return a point on the line.
const Point &	getTangent () const
	Return the tangent to the line.
const Point &	getNormal () const
	Return the normal to the line.
const Segment &	getSegment () const
	Return the segment on which the line is built.
Mathematical operations.
Line_2 &	operator+= (const Point &p)
	Translate the line by p.
Line_2 &	operator-= (const Point &p)
	Translate the line by -p.
Number	computeSignedDistance (const Point &p) const
	Distance to the line.
Number	computeSignedDistanceAndClosestPoint (const Point &p, Point *cp) const
	Distance and closest point to the line.
void	computeIntersection (Point p1, Point p2, Point *intersectionPoint) const
	Compute the point where the line through p1 and p2 intersects this line.
Related Functions
(Note that these are not member functions.)
template<typename T >
const Line_2< T > &	operator+ (const Line_2< T > &x)
	Unary positive operator.
template<typename T >
Line_2< T >	operator- (const Line_2< T > &x)
	Unary negative operator.
template<typename T >
std::istream &	operator>> (std::istream &in, Line_2< T > &x)
	Read a line.
template<typename T >
std::ostream &	operator<< (std::ostream &out, const Line_2< T > &x)
	Write a line.
template<typename T >
bool	operator== (const Line_2< T > &a, const Line_2< T > &b)
	Return true if the lines are equal.
template<typename T >
bool	operator!= (const Line_2< T > &a, const Line_2< T > &b)
	Return true if the lines are not equal.

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Detailed Description

template<typename T = double>
class Line_2< T >

A line in 2-D.

Parameters:

T

is the number type. By default it is double.

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Friends And Related Function Documentation

template<typename T >

bool operator!=	(	const Line_2< T > &	a,
		const Line_2< T > &	b
	)			[related]

Return true if the lines are not equal.

template<typename T >

const Line_2< T > & operator+

(

const Line_2< T > &

x

)

[related]

Unary positive operator.

template<typename T >

Line_2< T > operator-

(

const Line_2< T > &

x

)

[related]

Unary negative operator.

References Line_2< T >::getSegment().

template<typename T >

std::ostream & operator<<	(	std::ostream &	out,
		const Line_2< T > &	x
	)			[related]

Write a line.

References Line_2< T >::getSegment().

template<typename T >

bool operator==	(	const Line_2< T > &	a,
		const Line_2< T > &	b
	)			[related]

Return true if the lines are equal.

References Line_2< T >::getSegment().

template<typename T >

std::istream & operator>>	(	std::istream &	in,
		Line_2< T > &	x
	)			[related]

Read a line.

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

• Line_2.h