Perlin noise. More...

#include <noise.h>

Inheritance diagram for Noise2:

Public Member Functions
	Noise2 (bool=false)
	Create a noise function.

	~Noise2 ()
	Empty.

double	Value (const Vector2 &) const
	Compute noise at a given point in the plane.

double	K () const
	Return the global Lipschitz constant of the noise.

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 Attributes
bool	quintic = false
	Flag defining interpolation type: either cubic (false) or quintic (true).

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.

Static Protected Attributes
static double	rtable [267]
	Random double table.

static const short	hashTable [4096]
	Hash table.

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

Additional Inherited Members
Protected Member Functions inherited from AnalyticScalarField2
Matrix	Local (const Vector2 &) const
	Compute the local neighborhood in the one-ring aroung a point.

Detailed Description

Perlin noise.

This class is used as a core class to create various types of fractal noise, such as sums of scaled noises.

Constructor & Destructor Documentation

Noise2::Noise2 ( bool quintic = false )

Create a noise function.

Parameters

quintic Flag defining whether quintic interpolation will be used, noise uses cubic interpolation if set to false.

double Noise2::Value ( const Vector2 & p ) const

virtual

Compute noise at a given point in the plane.

Parameters

p Point.

Reimplemented in NoiseTurbulence2.