adskNoise.h File Reference

---

Detailed Description

Shader SDK noise functions.

#include <shader.h>
#include "adskExport.h"
#include "adskShaderSDKNamespaceBegin.h"
#include "adskShaderSDKNamespaceEnd.h"

Include dependency graph for adskNoise.h:

Functions
double	noise_drand (int *seed)
	Generate a double precision pseudo-random number.
float	noise_frand (int *seed)
	Generate a single precision pseudo-random number.
void	noise_gradient_init (miState *state)
	Initialize the gradient noise function.
float	noise_gradient_3d (float x, float y, float z)
	Compute gradient noise for a given 3D location.
float	noise_scalar_1d (double x)
	Generate scalar one dimensional quadratic noise.
float	noise_scalar_2d (double x, double y)
	Generate scalar two dimensional quadratic noise.
miVector	noise_vector_2d (double x, double y)
	Generate vector two dimensional quadratic noise.
float	noise_scalar_3d (double x, double y, double z)
	Generate scalar three dimensional quadratic noise.
float	noise_scalar_4d (double x, double y, double z, double t, int steps)
	Generate scalar four dimensional quadratic noise.
double	noise_table_scalar (int index)
	Generate scalar noise based on a lookup table.
miVector	noise_table_vector (int index)
	Generate vector noise based on a lookup table.

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Function Documentation

double noise_drand

(

int *

seed

)

Generate a double precision pseudo-random number.

Parameters:

[in,out]

seed

Initial random seed. Modified after each call.

Returns:

A pseudo-random number.

float noise_frand

(

int *

seed

)

Generate a single precision pseudo-random number.

Parameters:

[in,out]

seed

Initial random seed. Modified after each call.

Returns:

A pseudo-random number.

float noise_gradient_3d	(	float	x,
		float	y,
		float	z
	)

Compute gradient noise for a given 3D location.

Parameters:

[in]	x	x coordinate for noise function
[in]	y	y coordinate for noise function
[in]	z	z coordinate for noise function

Returns:

The scalar noise value.

void noise_gradient_init

(

miState *

state

)

Initialize the gradient noise function.

Parameters:

[in]

state

The current miState.

float noise_scalar_1d

(

double

x

)

Generate scalar one dimensional quadratic noise.

Parameters:

[in]

x

x coordinate for noise function

Returns:

The scalar noise value.

float noise_scalar_2d	(	double	x,
		double	y
	)

Generate scalar two dimensional quadratic noise.

Parameters:

[in]	x	x coordinate for noise function
[in]	y	y coordinate for noise function

Returns:

The scalar noise value.

float noise_scalar_3d	(	double	x,
		double	y,
		double	z
	)

Generate scalar three dimensional quadratic noise.

Parameters:

[in]	x	x coordinate for noise function
[in]	y	y coordinate for noise function
[in]	z	z coordinate for noise function

Returns:

The scalar noise value.

float noise_scalar_4d	(	double	x,
		double	y,
		double	z,
		double	t,
		int	steps
	)

Generate scalar four dimensional quadratic noise.

Parameters:

[in]	x	x coordinate for noise function
[in]	y	y coordinate for noise function
[in]	z	z coordinate for noise function
[in]	t	t coordinate for noise function
[in]	steps	Number of steps for given time value.

Returns:

The scalar noise value.

double noise_table_scalar

(

int

index

)

Generate scalar noise based on a lookup table.

Parameters:

[in]

index

The index in the lookup table.

Returns:

The scalar noise value.

miVector noise_table_vector

(

int

index

)

Generate vector noise based on a lookup table.

Parameters:

[in]

index

The index in the lookup table.

Returns:

The vector noise value.

miVector noise_vector_2d	(	double	x,
		double	y
	)

Generate vector two dimensional quadratic noise.

Parameters:

[in]	x	x coordinate for noise function
[in]	y	y coordinate for noise function

Returns:

The vector noise.