Simplex noise in the plane. More...

#include <noise.h>

Inheritance diagram for SimplexNoise2:

Public Member Functions
	SimplexNoise2 ()
	Empty.

	~SimplexNoise2 ()
	Empty.

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

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.

Static Protected Attributes
static const Vector2	grad2 [8]
	Array of gradients.

static const int	perm [512]
	Permutation table, 256 entries duplicated once to avoid modulo computations.

static const double	G2 = (3.0 - sqrt(3.0)) / 6.0
	Unskew factors for planar case.

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.

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.

Detailed Description

Simplex noise in the plane.

Simplex noise functions return random values in [-1,+1] interval.

Member Function Documentation

double SimplexNoise2::Value ( const Vector2 & p ) const

virtual

Compute the simplex noise at a given point.

Parameters

p Point.