SimplexNoise Class Reference

A Perlin Simplex Noise C++ Implementation (1D, 2D, 3D, 4D). More...

#include <SimplexNoise.h>

Public Member Functions
float	fractal (size_t octaves, float x) const
float	fractal (size_t octaves, float x, float y) const
	SimplexNoise (float frequency=1.0f, float amplitude=1.0f, float lacunarity=2.0f, float persistence=0.5f)

Static Public Member Functions
static float	simplex1 (float x)
static float	noise (float x)
static float	noise (float x, float y)

Detailed Description

A Perlin Simplex Noise C++ Implementation (1D, 2D, 3D, 4D).

Constructor & Destructor Documentation

SimplexNoise()

SimplexNoise::SimplexNoise ( float frequency = 1.0f, float amplitude = 1.0f, float lacunarity = 2.0f, float persistence = 0.5f )

inlineexplicit

Constructor of to initialize a fractal noise summation

Parameters

[in]	frequency	Frequency ("width") of the first octave of noise (default to 1.0)
[in]	amplitude	Amplitude ("height") of the first octave of noise (default to 1.0)
[in]	lacunarity	Lacunarity specifies the frequency multiplier between successive octaves (default to 2.0).
[in]	persistence	Persistence is the loss of amplitude between successive octaves (usually 1/lacunarity)

Member Function Documentation

noise() [1/2]

float SimplexNoise::noise ( float x )

static

1D Perlin simplex noise

Takes around 74ns on an AMD APU.

Parameters

[in]

x

float coordinate

Returns

Noise value in the range[-1; 1], value of 0 on all integer coordinates.

noise() [2/2]

float SimplexNoise::noise ( float x, float y )

static

2D Perlin simplex noise

Takes around 150ns on an AMD APU.

Parameters

[in]	x	float coordinate
[in]	y	float coordinate

Returns

Noise value in the range[-1; 1], value of 0 on all integer coordinates.

fractal() [1/2]

float SimplexNoise::fractal	(	size_t	octaves,
		float	x ) const

Fractal/Fractional Brownian Motion (fBm) summation of 1D Perlin Simplex noise

Parameters

[in]	octaves	number of fraction of noise to sum
[in]	x	float coordinate

Returns

Noise value in the range[-1; 1], value of 0 on all integer coordinates.

fractal() [2/2]

float SimplexNoise::fractal	(	size_t	octaves,
		float	x,
		float	y ) const

Fractal/Fractional Brownian Motion (fBm) summation of 2D Perlin Simplex noise

Parameters

[in]	octaves	number of fraction of noise to sum
[in]	x	x float coordinate
[in]	y	y float coordinate

Returns

Noise value in the range[-1; 1], value of 0 on all integer coordinates.

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

• examples/Salt/pink-trombone/SimplexNoise.h
• examples/Salt/pink-trombone/SimplexNoise.cpp