cImprovedNoise Class Reference

Improved noise, as described by Ken Perlin: https://mrl.nyu.edu/~perlin/paper445.pdf Implementation adapted from Perlin's Java implementation: https://mrl.nyu.edu/~perlin/noise/. More...

#include <Noise.h>

Public Member Functions
	cImprovedNoise (int a_Seed)
	Constructs a new instance of the noise obbject. More...
void	Generate2D (NOISE_DATATYPE *a_Array, int a_SizeX, int a_SizeY, NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX, NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY) const
	Fills a 2D array with the values of the noise. More...
void	Generate3D (NOISE_DATATYPE *a_Array, int a_SizeX, int a_SizeY, int a_SizeZ, NOISE_DATATYPE a_StartX, NOISE_DATATYPE a_EndX, NOISE_DATATYPE a_StartY, NOISE_DATATYPE a_EndY, NOISE_DATATYPE a_StartZ, NOISE_DATATYPE a_EndZ) const
	Fills a 3D array with the values of the noise. More...
NOISE_DATATYPE	GetValueAt (int a_X, int a_Y, int a_Z)
	Returns the value at the specified integral coords. More...

Static Protected Member Functions
static NOISE_DATATYPE	Fade (NOISE_DATATYPE a_T)
	Calculates the fade curve, 6 * t^5 - 15 * t^4 + 10 * t^3. More...
static NOISE_DATATYPE	Grad (int a_Hash, NOISE_DATATYPE a_X, NOISE_DATATYPE a_Y, NOISE_DATATYPE a_Z)
	Returns the gradient value based on the hash. More...

Protected Attributes
int	m_Perm [512]
	The permutation table used by the noise function. More...

Detailed Description

Improved noise, as described by Ken Perlin: https://mrl.nyu.edu/~perlin/paper445.pdf Implementation adapted from Perlin's Java implementation: https://mrl.nyu.edu/~perlin/noise/.

Definition at line 121 of file Noise.h.

Constructor & Destructor Documentation

cImprovedNoise::cImprovedNoise

(

int

a_Seed

)

Constructs a new instance of the noise obbject.

Note that this operation is quite expensive (the permutation array being constructed).

Definition at line 873 of file Noise.cpp.

Member Function Documentation

static NOISE_DATATYPE cImprovedNoise::Fade ( NOISE_DATATYPE  a_T )

inlinestaticprotected

Calculates the fade curve, 6 * t^5 - 15 * t^4 + 10 * t^3.

Definition at line 157 of file Noise.h.

void cImprovedNoise::Generate2D	(	NOISE_DATATYPE *	a_Array,
		int	a_SizeX,
		int	a_SizeY,
		NOISE_DATATYPE	a_StartX,
		NOISE_DATATYPE	a_EndX,
		NOISE_DATATYPE	a_StartY,
		NOISE_DATATYPE	a_EndY
	)		const

Fills a 2D array with the values of the noise.

Parameters

a_Array	Array to generate into [x + a_SizeX * y]
a_SizeY	Count of the array, in each direction
a_EndX	Noise-space coords of the array in the X direction
a_EndY	Noise-space coords of the array in the Y direction

Definition at line 900 of file Noise.cpp.

void cImprovedNoise::Generate3D	(	NOISE_DATATYPE *	a_Array,
		int	a_SizeX,
		int	a_SizeY,
		int	a_SizeZ,
		NOISE_DATATYPE	a_StartX,
		NOISE_DATATYPE	a_EndX,
		NOISE_DATATYPE	a_StartY,
		NOISE_DATATYPE	a_EndY,
		NOISE_DATATYPE	a_StartZ,
		NOISE_DATATYPE	a_EndZ
	)		const

Fills a 3D array with the values of the noise.

Parameters

a_Array	Array to generate into [x + a_SizeX * y + a_SizeX * a_SizeY * z]
a_SizeZ	Count of the array, in each direction
a_EndX	Noise-space coords of the array in the X direction
a_EndY	Noise-space coords of the array in the Y direction
a_EndZ	Noise-space coords of the array in the Z direction

Definition at line 947 of file Noise.cpp.

NOISE_DATATYPE cImprovedNoise::GetValueAt	(	int	a_X,
		int	a_Y,
		int	a_Z
	)

Returns the value at the specified integral coords.

Used for raw speed measurement.

Definition at line 1013 of file Noise.cpp.

static NOISE_DATATYPE cImprovedNoise::Grad ( int  a_Hash, NOISE_DATATYPE  a_X, NOISE_DATATYPE  a_Y, NOISE_DATATYPE  a_Z  )

inlinestaticprotected

Returns the gradient value based on the hash.

Definition at line 163 of file Noise.h.

Member Data Documentation

int cImprovedNoise::m_Perm[512]

protected

The permutation table used by the noise function.

Initialized using seed.

Definition at line 153 of file Noise.h.

---

The documentation for this class was generated from the following files:

• src/Noise/Noise.h
• src/Noise/Noise.cpp