Fractal Brownian motion from a cellular noise function. More...

#include <turbulence.h>

Public Member Functions
	CellularTurbulence2 (const double &, const double &, const double &, const double &=0.5, const double &=0.5, int=8, const Vector2 &=Vector2::Null)
	Create a scaled turbulence.

	CellularTurbulence2 ()
	Unit turbulence.

	~CellularTurbulence2 ()
	Empty.

virtual double	Value (const Vector2 &) const
	Compute the value of the field.

Protected Member Functions
double	UnitAt (const Vector2 &) const
	Compute the turbulence value at a given point.

Protected Attributes
double	alpha = 0.5
	Amplitude attenuation coefficient.

double	lambda = 0.5
	Wavelength amplification coefficient.

int	octaves = 4
	Number of octaves.

Vector2	t = Vector2::Null
	Translation.

double	v0 = 0.0
	Base value.

double	a0 = 1.0
	Base amplitude.

double	l0 = 1.0
	Wavelength.

Static Protected Attributes
static const Matrix2	R2 = Matrix2::Rotation(4.0 * Math::Pi / 19.0)
	Random incremental rotation in the plane.

Detailed Description

Fractal Brownian motion from a cellular noise function.

Constructor & Destructor Documentation

CellularTurbulence2::CellularTurbulence2	(	const double &	v,
		const double &	a,
		const double &	l,
		const double &	alpha = 0.5,
		const double &	lambda = 0.5,
		int	octaves = 8,
		const Vector2 &	t = Vector2::Null )

explicit

Create a scaled turbulence.

Parameters

v,a,l	Base value, amplitude and wavelength.
alpha	Amplitude attenuation factor (~0.5, should be less than 1.0).
lambda	Wavelength attenuation factor (~0.5, should be less than 1.0).
octaves	Number of octaves.
t	Translation offset.

double CellularTurbulence2::UnitAt ( const Vector2 & p ) const

protected

Compute the turbulence value at a given point.

Sums a series of scaled noise functions.

Parameters

p Point.

double CellularTurbulence2::Value ( const Vector2 & p ) const

virtual

Compute the value of the field.

Parameters

p Point.