DiscTileLinked Class Reference

This class implements a Poisson disc tile structure with topological information between discs, with various generation algorithms. More...

#include <sampling.h>

Inheritance diagram for DiscTileLinked:

Public Member Functions
Vector2	NextVertex (int, int) const
	Return the position of the j-th vertex linked to vertex i.
QPoint	Next (int, int) const
	Return the indexes defining the j-th vertex linked to vertex i.
int	Valence (int) const
	Return the valence of the disc.
QString	GetCode () const
	Get the code of the tile.
int	Memory () const
	Get the code of the tile.
Public Member Functions inherited from DiscTile
	DiscTile ()
	Empty.
	DiscTile (const double &, const double &, const QVector< Vector2 > &)
	Create a Poisson disc sampling over a square domain.
	DiscTile (const double &, const double &, int, Random &=Random::R239)
	Create a poisson sampling in a square domain.
	DiscTile (const double &, const double &, int, const QVector< Vector2 > &, Random &=Random::R239)
	Create a poisson sampling in a square domain.
	~DiscTile ()
	Empty.
void	Relaxation (const double &=1.0/4.0)
	Perform a relaxation step over the Poisson-Disc distribution.
void	Relaxation (int, const double &=1.0/4.0)
	Perform a relaxation step over the Poisson-Disc distribution.
void	Scramble ()
	Scramble the points inside the generated tile.
void	Draw (QGraphicsScene &) const
	Draw the distribution.
Box2	GetBox () const
	Return the box.
double	Radius () const
	Return the radius.
Vector2	Vertex (int) const
	Getter on the i-th sample.
Vector2	Vertex (int, int, int) const
	Compute the i-th sample for a displaced tile.
Vector2	Vertex (const QPoint &, int) const
	Compute the i-th sample for a displaced tile.
const QVector< Vector2 >	GetSet () const
	Return the vector containing the samples.
int	Size () const
	Return the number of samples.
void	Scale (const double &)
	Scale a disc tile.
QVector< Vector2 >	Sample (const Box2 &, double(*)(const Vector2 &)) const
	Sample a domain according to an input importance function.
QVector< Vector2 >	Sample (const ScalarField2 &) const
	Sample a domain according to an input importance function.
QVector< Vector2 >	Sample (const Box2 &) const
	Sample a domain according to an input importance function.
double	Packing () const
	Compute the packing density.
QString	GetCode () const
	Get the code of the tile.
int	Memory () const
	Get the code of the tile.

Protected Member Functions
void	TrucMuch (const Box2 &, QVector< Vector2 > &q, QVector< QPoint > &refs) const
	Compute the set of points in the one-neighborhood of the tile that also lie inside the argument box.
Protected Member Functions inherited from DiscTile
void	Generate (int, Random &=Random::R239)
	Generate the poisson sampling of the domain.
bool	Intersect (const Vector2 &, bool=true) const
	Check if a disc intersect existing discs inside the tile, with or without toric constraints.

Protected Attributes
QVector< DiscLink >	topo
	Topology.
Protected Attributes inherited from DiscTile
double	s = 0.0
	Size.
double	r = 0.0
	Radius.
double	e = 0.0
	Squared radius with small epsilon tolerance.
QVector< Vector2 >	p
	Set of samples.

Static Protected Attributes
static const QPoint	next [9] = { QPoint(1,0),QPoint(1,1),QPoint(0,1),QPoint(-1,1),QPoint(-1,0),QPoint(-1,-1),QPoint(0,-1),QPoint(1,-1),QPoint(0,0) }
	Neigboring cells, including self.
static const Vector2	nextvector [9] = { Vector2(1,0), Vector2(1,1),Vector2(0,1),Vector2(-1,1),Vector2(-1,0),Vector2(-1,-1),Vector2(0,-1),Vector2(1,-1),Vector2(0,0) }
	Offset vectors for neigboring cells, including self.

Additional Inherited Members
Static Public Member Functions inherited from DiscTile
static bool	Check (const Vector2 &, const QVector< Vector2 > &, double)
	Performs a Poisson disc check on a set of point and a candidate position.
Static Public Attributes inherited from DiscTile
static const DiscTile	T619
	Reference unit box tiles with 231 and 619 discs.

Detailed Description

This class implements a Poisson disc tile structure with topological information between discs, with various generation algorithms.

Member Function Documentation

Next()

QPoint DiscTileLinked::Next	(	int	i,
		int	j ) const

Return the indexes defining the j-th vertex linked to vertex i.

Parameters

i	Vertex in the tile.
j	Link.

Returns

A QPoint with first coordinate set as the vertex index, and second coordinate as the cell.

NextVertex()

Vector2 DiscTileLinked::NextVertex	(	int	i,
		int	j ) const

Return the position of the j-th vertex linked to vertex i.

Parameters

i	Vertex in the tile.
j	Link.

TrucMuch()

void DiscTileLinked::TrucMuch ( const Box2 & box, QVector< Vector2 > & q, QVector< QPoint > & refs ) const

protected

Compute the set of points in the one-neighborhood of the tile that also lie inside the argument box.

Parameters

box	The box.
q	Returned set of points.
refs	Returned set of references, index and cell.

Valence()

int DiscTileLinked::Valence

(

int

i

)

const

Return the valence of the disc.

Parameters

i	Index of the disc in the tile.