GaborNoise Class Reference

Procedural noise using sparse Gabor convolution. More...

#include <gabornoise.h>

Inheritance diagram for GaborNoise:

Public Member Functions
	GaborNoise (const double &, const double &, const double &, const double &, const double &, unsigned int)
	Create Gabor Noise.
double	Value (const Vector2 &) const
	Compute the Gabor noise at a given point.
double	Cell (int, int, const double &, const double &) const
	Compute the noise in a given cell.
double	Variance () const
	Compute the variance.
Public Member Functions inherited from AnalyticScalarField2
	AnalyticScalarField2 (bool=true)
	Constructor.
virtual Vector2	Gradient (const Vector2 &) const
	Compute the gradient of the field.
virtual Matrix2	Hessian (const Vector2 &) const
	Compute the hessian at a given point.
virtual ScalarField2	Sample (const Array2 &) const
	Create a discrete scalar field by sampling a given domain.
bool	Inside (const double &) const
	Check if the value is considered as inside or outside.
void	Curvature (const Vector2 &, double &, double &) const
	Compute the gaussian and mean curvatures.
virtual Box2	GetBox () const
	Return the bounding box.

Protected Member Functions
double	Gabor (const double &, const double &) const
	Compute the Gabor Kernel.
Protected Member Functions inherited from AnalyticScalarField2
Matrix	Local (const Vector2 &) const
	Compute the local neighborhood in the one-ring aroung a point.

Protected Attributes
double	K
	Amplitude.
double	a
	Sigma.
double	F0
	Frequency.
double	r
	Kernel radius.
double	d
	Impulse density.
unsigned int	o
	Random offset.
double	s0
	Cosine and sine of pulsation.
Protected Attributes inherited from AnalyticScalarField2
bool	sign = true
	Sign convention, used for normal computation.
Box2	box = Box2::Infinity
	Domain, set as infinite for base class.

Additional Inherited Members
Static Protected Attributes inherited from AnalyticScalarField2
static const double	epsilon = 1e-6
	\epsilon; value for partial derivatives

Detailed Description

Procedural noise using sparse Gabor convolution.

From A. Lagae, S. Lefebvre, G. Drettakis and P. Dutre. ACM Transactions on Graphics, 28(3), 2009.

Constructor & Destructor Documentation

GaborNoise()

GaborNoise::GaborNoise	(	const double &	K,
		const double &	a,
		const double &	F_0,
		const double &	w0,
		const double &	n,
		unsigned int	offset )

Create Gabor Noise.

Parameters

K	Amplitude.
a	Sigma.
F_0	Frequency.
w0	Pulsation.
n	Number of impulses per kernel.
offset	Random offset.

Member Function Documentation

Cell()

double GaborNoise::Cell	(	int	i,
		int	j,
		const double &	x,
		const double &	y ) const

Compute the noise in a given cell.

Parameters

i,j	Integer coordinates of the cell.
x,y	Coordinates of the point in the cell.

Gabor()

double GaborNoise::Gabor ( const double & x, const double & y ) const

protected

Compute the Gabor Kernel.

Parameters

x,y	Coordinates of the point.

Value()

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

virtual

Compute the Gabor noise at a given point.

Parameters

p

Point.

Reimplemented from AnalyticScalarField2.