VectorSet2 Class Reference

A simple set of vectors in the plane. More...

#include <vectorset.h>

Inheritance diagram for VectorSet2:

Public Member Functions
	VectorSet2 ()
	Empty.
	VectorSet2 (const QVector< Vector2 > &)
	Create a set of vectors.
	~VectorSet2 ()
	Empty.
VectorSet2	VectorToPoint () const
	Convert a series of displacements into positions.
void	Reverse ()
	Reverse the order of the elements.
int	Size () const
	Return the size of the set.
Vector2	At (int) const
	Access to element.
Vector2 &	operator[] (int)
	Access to element.
Vector2	Barycenter () const
	Compute the barycenter.
void	Vibrate (const double &)
	Randomly move the points.
Box2	GetBox () const
	Compute the bounding box.
Convex2	GetHull () const
	Compute the convex hull of the set.
void	Rotate (const Matrix2 &)
	Rotate all the points.
void	Rotate (const double &)
	Rotate all the points.
void	Translate (const Vector2 &)
	Translate all the points.
void	Scale (const double &)
	Scale all the points.
void	Scale (const Vector2 &)
	Scale all the points.
VectorSet2	Transformed (const Frame2 &) const
	Compute the transformed set.
VectorSet2	Translated (const Vector2 &) const
	Compute the translated set.
VectorSet2	Rotated (const double &) const
	Compute the rotated set.
VectorSet2	Scaled (const Vector2 &) const
	Compute the scaled set.
VectorSet2	Cut (const Box2 &) const
	Return the subset of points that lie inside the box.
VectorSet2	Cut (const Octogon2 &) const
	Return the subset of points that lie inside the octogon.
QVector< Vector2 > &	Get ()
	Access to the internal structure.
const QVector< Vector2 > &	Get () const
	Access to the internal structure.
int	Nearest (const Vector2 &) const
	Compute the index of the nearest point to the argument point.
QVector< Vector2 >	Nearest (const Vector2 &, int) const
	Compute the k-nearest points to the argument point.
QVector< int >	NearestIndexes (const Vector2 &, int) const
	Compute the set of indexes of the k-nearest points to the argument point.
QVector< int >	NearestIndexes (int, int, const double &=Math::Infinity) const
	Compute the set of indexes of the k-nearest points to the argument point in the set.
void	Draw (const double &, QGraphicsScene &, const QPen &=QPen(), const QBrush &=QBrush()) const
	Draws the set of vectors as a set of discs.
VectorSet2	operator+ (const VectorSet2 &) const
	Append a vector set to another one.
void	operator+= (const VectorSet2 &)
	Append a vector set.

Protected Attributes
QVector< Vector2 >	v
	Vectors.

Friends
std::ostream &	operator<< (std::ostream &s, const VectorSet2 &set)
	Overloaded output-stream operator.

Detailed Description

A simple set of vectors in the plane.

The class provides range-based for loops.

See also

VectorSet

Constructor & Destructor Documentation

VectorSet2()

VectorSet2::VectorSet2

(

const QVector< Vector2 > &

s

)

Create a set of vectors.

Parameters

s

The set.

Member Function Documentation

Cut() [1/2]

VectorSet2 VectorSet2::Cut

(

const Box2 &

box

)

const

Return the subset of points that lie inside the box.

Parameters

box

The box.

Cut() [2/2]

VectorSet2 VectorSet2::Cut

(

const Octogon2 &

octogon

)

const

Return the subset of points that lie inside the octogon.

Parameters

octogon

The octogon.

Draw()

void VectorSet2::Draw	(	const double &	r,
		QGraphicsScene &	scene,
		const QPen &	pen = QPen(),
		const QBrush &	brush = QBrush() ) const

Draws the set of vectors as a set of discs.

Parameters

r	Radius.
scene	Graphics scene.
pen	The pen.
brush	The brush.

GetBox()

Box2 VectorSet2::GetBox

(

)

const

Compute the bounding box.

Simply calls Box::Box(const QVector&).

Nearest() [1/2]

int VectorSet2::Nearest

(

const Vector2 &

p

)

const

Compute the index of the nearest point to the argument point.

Parameters

p

Point.

Nearest() [2/2]

QVector< Vector2 > VectorSet2::Nearest	(	const Vector2 &	p,
		int	n ) const

Compute the k-nearest points to the argument point.

Parameters

p	Point.
n	Number of points.

NearestIndexes() [1/2]

QVector< int > VectorSet2::NearestIndexes	(	const Vector2 &	p,
		int	n ) const

Compute the set of indexes of the k-nearest points to the argument point.

Parameters

p	Point.
n	Number of points.

NearestIndexes() [2/2]

QVector< int > VectorSet2::NearestIndexes	(	int	ip,
		int	n,
		const double &	d = Math::Infinity ) const

Compute the set of indexes of the k-nearest points to the argument point in the set.

Parameters

ip	Index of the point.
n	Number of points.
d	Maximum distance threshold.

operator+()

VectorSet2 VectorSet2::operator+

(

const VectorSet2 &

b

)

const

Append a vector set to another one.

Parameters

b	Added set.

operator+=()

void VectorSet2::operator+=

(

const VectorSet2 &

b

)

Append a vector set.

Parameters

b	Added set.

Rotate() [1/2]

void VectorSet2::Rotate

(

const double &

a

)

Rotate all the points.

Parameters

a	Rotation angle.

Rotate() [2/2]

void VectorSet2::Rotate

(

const Matrix2 &

r

)

Rotate all the points.

Parameters

r	Rotation matrix.

Rotated()

VectorSet2 VectorSet2::Rotated

(

const double &

a

)

const

Compute the rotated set.

Parameters

a	Rotation matrix.

Scale() [1/2]

void VectorSet2::Scale

(

const double &

s

)

Scale all the points.

Parameters

s	Scaling factor.

Scale() [2/2]

void VectorSet2::Scale

(

const Vector2 &

s

)

Scale all the points.

Parameters

s	Scaling vector.

Scaled()

VectorSet2 VectorSet2::Scaled

(

const Vector2 &

s

)

const

Compute the scaled set.

Parameters

s	Scaling vector.

Transformed()

VectorSet2 VectorSet2::Transformed

(

const Frame2 &

frame

)

const

Compute the transformed set.

Parameters

frame

The frame.

Translate()

void VectorSet2::Translate

(

const Vector2 &

t

)

Translate all the points.

Parameters

t	Translation vector.

Translated()

VectorSet2 VectorSet2::Translated

(

const Vector2 &

t

)

const

Compute the translated set.

Parameters

t	Translation vector.

VectorToPoint()

VectorSet2 VectorSet2::VectorToPoint

(

)

const

Convert a series of displacements into positions.

Only the first vector will be kept as origin.

Vibrate()

void VectorSet2::Vibrate

(

const double &

epsilon

)

Randomly move the points.

Move points using a random direction.

Parameters

epsilon

Moving distance.

Friends And Related Symbol Documentation

operator<<

std::ostream & operator<< ( std::ostream & s, const VectorSet2 & set )

friend

Overloaded output-stream operator.

Parameters

set	Set.
s	Stream.