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. More...
double	Value (const Vector2 &) const
	Compute the Gabor noise at a given point. More...
double	Cell (int, int, const double &, const double &) const
	Compute the noise in a given cell. More...
double	Variance () const
	Compute the variance.
Public Member Functions inherited from AnalyticScalarField2
	AnalyticScalarField2 ()
	Create an analytic scalar field defined over the entire plane.
virtual Vector2	Gradient (const Vector2 &) const
	Compute the gradient of the field. More...
virtual Matrix2	Hessian (const Vector2 &) const
	Compute the hessian at a given point. More...
virtual ScalarField2	Sample (const Array2 &) const
	Create a discrete scalar field by sampling a given domain. More...
void	Curvature (const Vector2 &, double &, double &) const
	Compute the gaussian and mean curvatures. More...
virtual Box2	GetBox () const
	Return the bounding box.

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

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
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.