Plucker coordinates representing line given by points A,B. More...

#include <plucker.hh>

Public Member Functions
	Plucker ()

	Plucker (const arma::vec3 &a, const arma::vec3 &b)
	Creates Plucker coordinates of a line AB. More...

	Plucker (const Plucker &p)
	Copy constructor. More...

	~Plucker ()
	Destructor. More...

double	scale () const

double	operator[] (const unsigned int index) const
	Returns Plucker coordinate of `index`. More...

double	operator* (const Plucker &b)
	Compute product of two Plucker coordinates. More...

void	clear ()
	Sets the flag computed on false. More...

bool	is_computed () const
	Return true if Plucker coordinates have been computed already. More...

void	compute (const arma::vec3 &a, const arma::vec3 &b)
	Compute Plucker coordinates and set computed to true. More...

arma::vec3	get_u_vector () const
	Gets directional vector U. More...

arma::vec3	get_ua_vector () const
	Gets cross product vector UxA. More...

arma::vec6	get_plucker_coords () const
	Gets Plucker coordinates. More...

Private Attributes
arma::vec6	coordinates_
	Plucker coordinates. More...

double	scale_

bool	computed_
	True, if Plucker coordinates are computed; false otherwise. More...

Friends
std::ostream &	operator<< (std::ostream &os, const Plucker &p)
	Friend output operator. More...

Detailed Description

Plucker coordinates representing line given by points A,B.

Plucker class represents a line by 6 dimensional vector. After inserting a three-dimensional points A and B, which represents the line, class creates plucker coordinates of the line.

Class also can compute a product of two plucker coordinates.

Description of Plücker Coordinates: https://en.wikipedia.org/wiki/Pl%C3%BCcker_coordinates

Empty constructor is used for passing object to pointers from different places coordinates data are filled after calling method "compute" a flag "computed" is for comparison if coordinates data are filled

question: is compute() used from outside ? answer: Yes

Definition at line 47 of file plucker.hh.

Constructor & Destructor Documentation

Plucker::Plucker ( )

inline

Default constructor. Plucker coordinates are not computed.

Definition at line 107 of file plucker.hh.

Plucker::Plucker	(	const arma::vec3 &	a,
		const arma::vec3 &	b
	)

inline

Creates Plucker coordinates of a line AB.

Parameters

a	- A point from AB line
b	- B point from AB line

Definition at line 110 of file plucker.hh.

Plucker::Plucker ( const Plucker & p )

inline

Copy constructor.

Definition at line 114 of file plucker.hh.

Plucker::~Plucker ( )

inline

Destructor.

Definition at line 67 of file plucker.hh.

Member Function Documentation

void Plucker::clear ( )

inline

Sets the flag computed on false.

Definition at line 122 of file plucker.hh.

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void Plucker::compute	(	const arma::vec3 &	a,
		const arma::vec3 &	b
	)

Compute Plucker coordinates and set computed to true.

Parameters

a	A point from AB line
b	B point from AB line (order of points determines orientation!)

Definition at line 11 of file plucker.cc.

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arma::vec6 Plucker::get_plucker_coords ( ) const

inline

Gets Plucker coordinates.

Definition at line 136 of file plucker.hh.

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arma::vec3 Plucker::get_u_vector ( ) const

inline

Gets directional vector U.

Definition at line 128 of file plucker.hh.

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arma::vec3 Plucker::get_ua_vector ( ) const

inline

Gets cross product vector UxA.

Definition at line 132 of file plucker.hh.

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bool Plucker::is_computed ( ) const

inline

Return true if Plucker coordinates have been computed already.

Definition at line 125 of file plucker.hh.

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double Plucker::operator* ( const Plucker & b )

Compute product of two Plucker coordinates.

Definition at line 7 of file plucker.cc.

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double Plucker::operator[] ( const unsigned int index ) const

inline

Returns Plucker coordinate of index.

Definition at line 118 of file plucker.hh.

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double Plucker::scale ( ) const

inline

Definition at line 69 of file plucker.hh.

Friends And Related Function Documentation

std::ostream& operator<<	(	std::ostream &	os,
		const Plucker &	p
	)

friend

Friend output operator.

Member Data Documentation

bool Plucker::computed_

private

True, if Plucker coordinates are computed; false otherwise.

Definition at line 52 of file plucker.hh.

arma::vec6 Plucker::coordinates_

private

Plucker coordinates.

Definition at line 50 of file plucker.hh.

double Plucker::scale_

private

Definition at line 51 of file plucker.hh.

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

/opt/flow123d/flow123d/src/intersection/plucker.hh
/opt/flow123d/flow123d/src/intersection/plucker.cc

Public Member Functions

Private Attributes

Friends

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation