IlvTurbulenceFilter Class Reference

Turbulence filter. More...

#include <ilviews/bitmaps/filters/turbulence.h>

Inheritance diagram for IlvTurbulenceFilter:

Public Types
enum	NoiseMode { Fractal, Turbulence }
	This enumeration defines the possible values for the noise mode. More...

Public Member Functions
	IlvTurbulenceFilter (IlFloat baseFrequencyX=0.05, IlFloat baseFrequencyY=0.05, IlUInt numOctaves=1, IlFloat seed=0.0, NoiseMode=Turbulence, IlBoolean stitch=IlFalse)
	Constructor. More...
IlvBitmapData *	apply (IlUInt count=0, const IlvBitmapData **datas=0)
	Applies the turbulence.
IlFloat	getBaseFrequencyX () const
	Returns the frequency in the x direction. More...
IlFloat	getBaseFrequencyY () const
	Returns the frequency in the y direction. More...
NoiseMode	getNoiseMode () const
	Returns the noise generator mode. More...
IlUInt	getNumOctaves () const
	Returns the octaves. More...
IlFloat	getSeed () const
	Returns the seed value. More...
void	setBaseFrequencyX (IlFloat frequency)
	Sets the frequency in the x direction. More...
void	setBaseFrequencyY (IlFloat frequency)
	Sets the frequency in the y direction. More...
void	setNoiseMode (NoiseMode mode)
void	setNumOctaves (IlUInt octaves)
	Sets the octaves. More...
void	setSeed (IlFloat seed)
	Sets the seed value for the random functions used by the filter. More...
Public Member Functions inherited from IlvBitmapFilter
	IlvBitmapFilter ()
	Constructor. More...
virtual	~IlvBitmapFilter ()
	Destructor. More...
IlvBitmapData *	applyUnary (const IlvBitmapData *data)
	Convenience method for unary filters. More...
virtual const char *	getClassName () const
	Returns the class name of the filter. More...
IlUInt	getHeight () const
	Returns the height of the filter effect region. More...
const char *const *	getInputs (IlUInt &count) const
	Returns the name of the input bitmap data. More...
const char *	getName () const
	Returns the name of the filter. More...
IlUInt	getRefCount () const
	Returns the reference count for this instance.
const char *	getResult () const
	Returns the name of the result bitmap data. More...
IlUInt	getWidth () const
	Returns the width of the filter effect region. More...
IlInt	getX () const
	Returns the left coordinate of the filter effect region. More...
IlInt	getY () const
	Returns the top coordinate of the filter effect region. More...
void	lock ()
	Locks the current instance.
void	setHeight (IlUInt height)
	Sets the height of the filter effect region. More...
void	setInputs (IlUInt count, const char *const *name)
	Sets the input names of the filter. More...
void	setName (const char *id)
	Sets the name of the filter. More...
void	setResult (const char *name)
	Sets the result name of the filter. More...
void	setWidth (IlUInt width)
	Sets the width of the filter effect region. More...
void	setX (IlInt x)
	Sets the left coordinate of the filter effect region. More...
void	setY (IlInt y)
	Sets the top coordinate of the filter effect region. More...
void	unLock ()
	Unlocks the current instance. When the reference count is 0, the instance is deleted.

Additional Inherited Members
Static Public Member Functions inherited from IlvBitmapFilter
static IlvBitmapFilter *	Create (const char *classname, IlBoolean forceLoad=IlTrue)
	This static method creates an instance of a bitmap filter of given classname. If the filter class is not registered and forceLoad is IlTrue, an attempt to load a dynamic module for this filter is made. More...
static const char **	GetRegisteredFilters (IlUInt &num)
	This static method returns an array of registered filter class names. More...

Detailed Description

Turbulence filter.

Library: ilvbmpflt

This bitmap filter lets you create images using the Ken Perlin turbulence function. It allows synthesis of natural textures such as cloud or marble. The basic algorithm sums for each pixel the values of a pseudo-random function using different scales and frequencies. You can specify the number of repetitions (octaves), the frequencies in each direction, and whether the filter generates turbulence of fractal noise. See "Texturing and Modeling", Ebert et al, AP Professional, 1994.

See Also

IlvRGBBitmapData, IlvBitmapFilter

Member Enumeration Documentation

enum IlvTurbulenceFilter::NoiseMode

This enumeration defines the possible values for the noise mode.

Enumerator
Fractal	The mode is Fractal.
Turbulence	The mode is Turbulence.

Constructor & Destructor Documentation

IlvTurbulenceFilter::IlvTurbulenceFilter	(	IlFloat	baseFrequencyX = 0.05,
		IlFloat	baseFrequencyY = 0.05,
		IlUInt	numOctaves = 1,
		IlFloat	seed = 0.0,
		NoiseMode	= Turbulence,
		IlBoolean	stitch = IlFalse
	)

Constructor.

Initializes a new instance of the class IlvTurbulenceFilter.

Member Function Documentation

IlFloat IlvTurbulenceFilter::getBaseFrequencyX

(

)

const

Returns the frequency in the x direction.

Returns

The frequency in the x direction.

IlFloat IlvTurbulenceFilter::getBaseFrequencyY

(

)

const

Returns the frequency in the y direction.

Returns

The frequency in the y direction.

NoiseMode IlvTurbulenceFilter::getNoiseMode

(

)

const

Returns the noise generator mode.

Returns

The noise generator mode.

IlUInt IlvTurbulenceFilter::getNumOctaves

(

)

const

Returns the octaves.

Returns

The octaves.

IlFloat IlvTurbulenceFilter::getSeed

(

)

const

Returns the seed value.

Returns

The seed value.

void IlvTurbulenceFilter::setBaseFrequencyX

(

IlFloat

frequency

)

Sets the frequency in the x direction.

Parameters

frequency

The new frequency.

void IlvTurbulenceFilter::setBaseFrequencyY

(

IlFloat

frequency

)

Sets the frequency in the y direction.

Parameters

frequency

The new frequency.

void IlvTurbulenceFilter::setNoiseMode

(

NoiseMode

mode

)

Specifies whether the generated image should exhibit fractal or turbulence aspect.

Parameters

isfractal

A Boolean value specifying whether the generated image should exhibit fractal (IlTrue) or turbulence IlFalse) patterns.

void IlvTurbulenceFilter::setNumOctaves

(

IlUInt

octaves

)

Sets the octaves.

Parameters

octaves

The new octaves.

void IlvTurbulenceFilter::setSeed

(

IlFloat

seed

)

Sets the seed value for the random functions used by the filter.

Parameters

seed	The new seed.