Dla2 Class Reference

A diffusion limited aggregation class. More...

#include <dla.h>

Inheritance diagram for Dla2:

Public Member Functions
	Dla2 (const double &)
	Create the diffuse limited aggregation structure.
	Dla2 (const Circle2 &, const double &)
	Create a diffuse limited aggregation structure.
	Dla2 (const Circle2 &, const QVector< Vector2 > &, const double &)
	Create a diffuse limited aggregation structure.
	~Dla2 ()
	Empty.
void	Add ()
	Add a new particle to the cluster.
void	AddBorder ()
	Add a new particle to the cluster.
void	Step (int)
	Add several particles to the cluster.
void	Extend (const double &)
	Extend the radius of the simulation.
void	Agregate (const Vector2 &)
	Perform a random walk from an initial position, and aggregate particle if it hits the cluster.
QVector< int >	GetIndices () const
	Return the indices.
Box2	GetBox () const
	Return the bounding box of the cluster.
void	Draw (QGraphicsScene &) const
	Draw the cluster.
bool	Hit (const Vector2 &, int &) const
	Detect the intersection between a disc and the cluster.
bool	Hit (const Vector2 &) const
	Detect the intersection between a disc and the cluster.
Public Member Functions inherited from ParticleSet2
	ParticleSet2 ()
	Empty constructor.
	ParticleSet2 (const double &)
	Create an empty set of particles.
	ParticleSet2 (const Vector2 &, const double &)
	Create a set of particles.
	ParticleSet2 (const QVector< Vector2 > &, const double &)
	Create a set of particles.
int	Size () const
	Return the number of particles.
Circle2	At (int) const
	Get the k-th particle.
double	Radius () const
	Return the radius of the particles.
QVector< Vector2 >	GetCenters () const
	Return the centers of the particles.
Circle2	GetCircle () const
	Computes the bounding circle of the centers of the particles.
Box2	GetBox () const
	Computes the bounding box of the centers of the particles.
void	Append (const Vector2 &)
	Add a new particle to the set.
bool	Intersect (const Circle2 &) const
	Check the intersection between the cluster and a circle.
bool	Intersect (const Box2 &) const
	Check the intersection between the cluster and a box.
void	Draw (QGraphicsScene &, const QPen &=QPen(QColor(150, 150, 200), 0.025), const QBrush &=QBrush(QColor(200, 200, 250))) const
	Draw the set of particles.

Protected Member Functions
bool	Walk (Vector2 &, int &, int=2000)
	Perform a random walk until the particle either collides with the cluster, or until it reaches the maximum number of steps or escapes from the domain.

Protected Attributes
Circle2	circle
	Bounding circle of the domain.
QVector< int >	v
	Tree structure topology, i.e., index of the collided particle during cluster growth.
Protected Attributes inherited from ParticleSet2
QVector< Vector2 >	points
	Set of particles.
double	r = 0.0
	Radius of particles.

Detailed Description

A diffusion limited aggregation class.

Constructor & Destructor Documentation

Dla2() [1/3]

Dla2::Dla2 ( const double & r )

explicit

Create the diffuse limited aggregation structure.

Set initial circle as empty, and list of particles as empty.

Parameters

r	Radius of particles.

Dla2() [2/3]

Dla2::Dla2 ( const Circle2 & c, const double & r )

explicit

Create a diffuse limited aggregation structure.

Parameters

c	Initial circle.
r	Radius of particles.

Dla2() [3/3]

Dla2::Dla2 ( const Circle2 & c, const QVector< Vector2 > & p, const double & r )

explicit

Create a diffuse limited aggregation structure.

Parameters

c	Initial circle.
p	Set of seed points.
r	Radius of particles.

Member Function Documentation

Add()

void Dla2::Add

(

)

Add a new particle to the cluster.

The particle is generated inside the embedding disc.

AddBorder()

void Dla2::AddBorder

(

)

Add a new particle to the cluster.

The particle is generated on the border of the embedding disc.

Agregate()

void Dla2::Agregate

(

const Vector2 &

start

)

Perform a random walk from an initial position, and aggregate particle if it hits the cluster.

Parameters

start

Initial position.

Draw()

void Dla2::Draw

(

QGraphicsScene &

scene

)

const

Draw the cluster.

Parameters

scene

Graphics scene.

Hit() [1/2]

bool Dla2::Hit

(

const Vector2 &

p

)

const

Detect the intersection between a disc and the cluster.

Parameters

p	Center of the disc.

Hit() [2/2]

bool Dla2::Hit	(	const Vector2 &	p,
		int &	c ) const

Detect the intersection between a disc and the cluster.

Parameters

p	Center of the disc.
c	Returned index of the first intersected disc.

Step()

void Dla2::Step

(

int

n

)

Add several particles to the cluster.

Parameters

n	Number of particles.

Walk()

bool Dla2::Walk ( Vector2 & p, int & c, int steps = 2000 )

protected

Perform a random walk until the particle either collides with the cluster, or until it reaches the maximum number of steps or escapes from the domain.

Parameters

p	Starting point.
c	Returned index of the particle collided.
steps	Maximum number of steps.