infinitesmoothperlin.cpp File Reference

Code file for 2D infinite smooth Perlin noise functions. More...

#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include "Common.h"

Functions
float	infinitesmoothnoise2 (float vec[2])
float	InfiniteSmoothPerlinNoise2D (float x, float y, float alpha, float beta, int n)
	Generate a cell of 2D infinite smooth Perlin noise.

Detailed Description

Infinite Smooth Perlin noise uses MurmurHash3 to get the gradients at integer points and smooths using quintic splines instead of cubic splines.

Function Documentation

float infinitesmoothnoise2

(

float

vec[2]

)

Compute a single octave of infinite smooth 2D noise at a single point.

Parameters

vec	Point at which to evaluate noise.

Returns

Noise value between -1.0 and 1.0.

float InfiniteSmoothPerlinNoise2D	(	float	x,
		float	y,
		float	alpha,
		float	beta,
		int	n
	)

Compute turbulence, also known as 1/f noise.

Parameters

x	X coordinate.
y	Y coordinate.
alpha	Persistence.
beta	Lacunarity.
n	Side of square grid.

Returns

Scale factor required to bring it down to range [-1, 1].