/PerlinNoiseKit

Simple Objective-C class to generate 1,2, and 3D Perlin Noise

Primary LanguageObjective-C

Perlin Noise for Objective-C

This is a Perlin Noise Generator based on information from Hugo Elias.

Usage:

To use: Simply add PerlinNoise.h and PerlinNoise.m to your project.

You can initalize the class like this:

PerlinNoise *perlin = [[PerlinNoise alloc] initWithSeed:someint];

Then by calling one of the output functions you will recieve a float that is the PerlinNoise value for the input.

float n = [perlin perlin1DValueForPoint:x];

or

float n = [perlin perlin2DValueForPoint:x :y];

You can manipulate the output using the following properties.

  • .seed (this is the number used to generate the output)

  • .octaves (how many iterations the function should run)

  • .persistance (this changes the frequency for the subsequent octaves)

  • .scale (multiply the output by this number, the default output is between 0 and 1)

  • .frequency (the distance between the returned values)

  • .interpolationType (this can be kLinearInterpolation or kCosineInterpolation, CosineInterpolation is slower)

Thanks to Hugo Elias for his wonderful page about perlin noise

http://freespace.virgin.net/hugo.elias/models/m_perlin.htm

Also thanks for my friend Tim Winter who always helps me find my bugs.