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

#include <plucker.hh>

Collaboration diagram for Plucker:

Public Member Functions
	Plucker ()

	Plucker (const Node a, const Node b)
	Creates Plucker coordinates object for a line AB. Does NOT compute Plucker coordinates. Does set end points and computes direction vector. More...

	Plucker (const Node a, const Node b, bool compute_pc)
	The same as above constructor, but can compute Pl. coordinates immediately if `compute_pc`. 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...

arma::vec3	point (unsigned int idx) const
	Gets coordinates of point. More...

void	compute ()
	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...

const Node *	points_ [2]

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

Definition at line 44 of file plucker.hh.

Constructor & Destructor Documentation

Plucker::Plucker ( )

Default constructor. Creates empty object, cannot call compute later!

Definition at line 5 of file plucker.cc.

Plucker::Plucker	(	const Node *	a,
		const Node *	b
	)

Creates Plucker coordinates object for a line AB. Does NOT compute Plucker coordinates. Does set end points and computes direction vector.

Parameters

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

Definition at line 13 of file plucker.cc.

Plucker::Plucker	(	const Node *	a,
		const Node *	b,
		bool	compute_pc
	)

The same as above constructor, but can compute Pl. coordinates immediately if compute_pc.

Definition at line 32 of file plucker.cc.

Plucker::~Plucker ( )

inline

Destructor.

Definition at line 70 of file plucker.hh.

Member Function Documentation

void Plucker::clear ( )

inline

Sets the flag computed on false.

Definition at line 115 of file plucker.hh.