an implicit function that implements Perlin noise More...

#include <vtkPerlinNoise.h>

Inheritance diagram for vtkPerlinNoise:

Collaboration diagram for vtkPerlinNoise:

Public Types
typedef vtkImplicitFunction	Superclass
Public Member Functions
virtual int	IsA (const char *type)
vtkPerlinNoise *	NewInstance () const
void	PrintSelf (ostream &os, vtkIndent indent)
void	EvaluateGradient (double x[3], double n[3])

double	EvaluateFunction (double x[3])
double	EvaluateFunction (double x, double y, double z)

virtual void	SetFrequency (double, double, double)
virtual void	SetFrequency (double[3])
virtual double *	GetFrequency ()
virtual void	GetFrequency (double data[3])

virtual void	SetPhase (double, double, double)
virtual void	SetPhase (double[3])
virtual double *	GetPhase ()
virtual void	GetPhase (double data[3])

virtual void	SetAmplitude (double)
virtual double	GetAmplitude ()
Static Public Member Functions
static int	IsTypeOf (const char *type)
static vtkPerlinNoise *	SafeDownCast (vtkObjectBase *o)
static vtkPerlinNoise *	New ()
Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const
	vtkPerlinNoise ()
	~vtkPerlinNoise ()
Protected Attributes
double	Frequency [3]
double	Phase [3]
double	Amplitude

Detailed Description

an implicit function that implements Perlin noise

vtkPerlinNoise computes a Perlin noise field as an implicit function. vtkPerlinNoise is a concrete implementation of vtkImplicitFunction. Perlin noise, originally described by Ken Perlin, is a non-periodic and continuous noise function useful for modeling real-world objects.

The amplitude and frequency of the noise pattern are adjustable. This implementation of Perlin noise is derived closely from Greg Ward's version in Graphics Gems II.

See also:: vtkImplicitFunction

Examples:: vtkPerlinNoise (Examples)

Tests:: vtkPerlinNoise (Tests)

Definition at line 43 of file vtkPerlinNoise.h.

Member Typedef Documentation

typedef vtkImplicitFunction vtkPerlinNoise::Superclass

Reimplemented from vtkImplicitFunction.

Definition at line 46 of file vtkPerlinNoise.h.

Constructor & Destructor Documentation

vtkPerlinNoise::vtkPerlinNoise ( ) [protected]

vtkPerlinNoise::~vtkPerlinNoise ( ) [inline, protected]

Definition at line 91 of file vtkPerlinNoise.h.

Member Function Documentation

static int vtkPerlinNoise::IsTypeOf ( const char * name ) [static]

Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkImplicitFunction.

virtual int vtkPerlinNoise::IsA ( const char * name ) [virtual]

Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkImplicitFunction.

static vtkPerlinNoise* vtkPerlinNoise::SafeDownCast ( vtkObjectBase * o ) [static]

Reimplemented from vtkImplicitFunction.

virtual vtkObjectBase* vtkPerlinNoise::NewInstanceInternal ( ) const [protected, virtual]

Reimplemented from vtkImplicitFunction.

vtkPerlinNoise* vtkPerlinNoise::NewInstance ( ) const

Reimplemented from vtkImplicitFunction.

void vtkPerlinNoise::PrintSelf	(	ostream &	os,
		vtkIndent	indent
	)		`[virtual]`

Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkImplicitFunction.

static vtkPerlinNoise* vtkPerlinNoise::New ( ) [static]

Instantiate the class.

Reimplemented from vtkObject.

double vtkPerlinNoise::EvaluateFunction ( double x[3] ) [virtual]

Evaluate PerlinNoise function.

Implements vtkImplicitFunction.

double vtkPerlinNoise::EvaluateFunction	(	double	x,
		double	y,
		double	z
	)		`[inline]`

Evaluate PerlinNoise function.

Reimplemented from vtkImplicitFunction.

Definition at line 55 of file vtkPerlinNoise.h.

void vtkPerlinNoise::EvaluateGradient	(	double	x[3],
		double	n[3]
	)		`[virtual]`

Evaluate PerlinNoise gradient. Currently, the method returns a 0 gradient.

Implements vtkImplicitFunction.

virtual void vtkPerlinNoise::SetFrequency	(	double	,
		double	,
		double
	)		`[virtual]`

Set/get the frequency, or physical scale, of the noise function (higher is finer scale). The frequency can be adjusted per axis, or the same for all axes.

virtual void vtkPerlinNoise::SetFrequency ( double [3] ) [virtual]

Set/get the frequency, or physical scale, of the noise function (higher is finer scale). The frequency can be adjusted per axis, or the same for all axes.

virtual double* vtkPerlinNoise::GetFrequency ( ) [virtual]

Set/get the frequency, or physical scale, of the noise function (higher is finer scale). The frequency can be adjusted per axis, or the same for all axes.

virtual void vtkPerlinNoise::GetFrequency ( double data[3] ) [virtual]

Set/get the frequency, or physical scale, of the noise function (higher is finer scale). The frequency can be adjusted per axis, or the same for all axes.

virtual void vtkPerlinNoise::SetPhase	(	double	,
		double	,
		double
	)		`[virtual]`

Set/get the phase of the noise function. This parameter can be used to shift the noise function within space (perhaps to avoid a beat with a noise pattern at another scale). Phase tends to repeat about every unit, so a phase of 0.5 is a half-cycle shift.

virtual void vtkPerlinNoise::SetPhase ( double [3] ) [virtual]

Set/get the phase of the noise function. This parameter can be used to shift the noise function within space (perhaps to avoid a beat with a noise pattern at another scale). Phase tends to repeat about every unit, so a phase of 0.5 is a half-cycle shift.

virtual double* vtkPerlinNoise::GetPhase ( ) [virtual]

Set/get the phase of the noise function. This parameter can be used to shift the noise function within space (perhaps to avoid a beat with a noise pattern at another scale). Phase tends to repeat about every unit, so a phase of 0.5 is a half-cycle shift.

virtual void vtkPerlinNoise::GetPhase ( double data[3] ) [virtual]

Set/get the phase of the noise function. This parameter can be used to shift the noise function within space (perhaps to avoid a beat with a noise pattern at another scale). Phase tends to repeat about every unit, so a phase of 0.5 is a half-cycle shift.

virtual void vtkPerlinNoise::SetAmplitude ( double ) [virtual]