Noise/Turbulence

Detailed Description

Functions
Float	SNoise (const Vector &p)
Float	SNoise (const Vector &p, Float t)
Float	Noise (const Vector &p)
Float	Noise (const Vector &p, Float t)
Float	PNoise (const Vector &p, const Vector &d)
Float	PNoise (const Vector &p, Float t, const Vector &d, Float dt)
Float	Turbulence (const Vector &p, Float oct, Bool abs)
Float	Turbulence (const Vector &p, Float t, Float oct, Bool abs)
Float	WavyTurbulence (const Vector &p, Float t, Float oct, Float start)

Function Documentation

SNoise() [1/2]

Float SNoise

(

const Vector &

p

)

Generates a signed noise value.

Parameters

[in]

p

The noise coordinate.

Returns

The signed noise value, between -1.0 and 1.0.

SNoise() [2/2]

Float SNoise	(	const Vector &	p,
		Float	t
	)

Generates a signed noise value.

Parameters

[in]	p	The noise coordinate.
[in]	t	The time.

Returns

The signed noise value, between -1.0 and 1.0.

Noise() [1/2]

Float Noise

(

const Vector &

p

)

Generates a noise value.

Parameters

[in]

p

The noise coordinate.

Returns

The noise value, between 0.0 and 1.0.

Noise() [2/2]

Float Noise	(	const Vector &	p,
		Float	t
	)

Generates a noise value.

Parameters

[in]	p	The noise coordinate.
[in]	t	The time.

Returns

The noise value, between 0.0 and 1.0.

PNoise() [1/2]

Float PNoise	(	const Vector &	p,
		const Vector &	d
	)

Generates a periodical noise value.
PNoise is based on SNoise():

#define NOISERES 1024
pnoise = SNoise(Vector(p.x*NOISERES/d.x, p.y*NOISERES/d.y, p.z*NOISERES/d.z));

Parameters

[in]	p	The noise coordinate.
[in]	d	The period.

Returns

The periodical noise value.

PNoise() [2/2]

Float PNoise	(	const Vector &	p,
		Float	t,
		const Vector &	d,
		Float	dt
	)

Generates a periodical noise value.
PNoise is based on SNoise():

#define NOISERES 1024
pnoise = SNoise(Vector(p.x*NOISERES/d.x, p.y*NOISERES/d.y, p.z*NOISERES/d.z));

Parameters

[in]	p	The noise coordinate.
[in]	t	The time.
[in]	d	The period.
[in]	dt	The time period.

Returns

The periodical noise value.

Turbulence() [1/2]

Float Turbulence	(	const Vector &	p,
		Float	oct,
		Bool	abs
	)

Generates a turbulence value, this is a sum of multiple noises with different frequency.

Parameters

[in]	p	The turbulence coordinate.
[in]	oct	The number of octaves.
[in]	abs	true for the absolute value.

Returns

The turbulence value, between -1.0 and 1.0 unless abs is true, in which case it will be between 0.0 to 1.0.

Turbulence() [2/2]

Float Turbulence	(	const Vector &	p,
		Float	t,
		Float	oct,
		Bool	abs
	)

Generates a turbulence value, this is a sum of multiple noises with different frequency.

Parameters

[in]	p	The turbulence coordinate.
[in]	t	The time.
[in]	oct	The number of octaves.
[in]	abs	true for the absolute value.

Returns

The turbulence value, between -1.0 and 1.0 unless abs is true, in which case it will be between 0.0 to 1.0.

WavyTurbulence()

Float WavyTurbulence	(	const Vector &	p,
		Float	t,
		Float	oct,
		Float	start
	)

Generates a wavy turbulence value, this is a sum of multiple noises with different frequency.

Parameters

[in]	p	The turbulence coordinate.
[in]	t	The time.
[in]	oct	The number of octaves.
[in]	start	The start value.

Returns

The turbulence value, between -1.0 and 1.0.