noise methods

The following methods are all part of the noise methods.
Defines 2D, 3D and 4D procedural noise functions Based on the work of Stefan Gustavson and Ashima Arts on "webgl-noise": https://github.com/ashima/webgl-noise Following Stefan Gustavson's paper "Simplex noise demystified": http://www.itn.liu.se/~stegu/simplexnoise/simplexnoise.pdf

Table of contents

perlin function
simplex function

perlin() function

`glm.perlin(p: vecN) -> float`

Classic perlin noise.

`glm.perlin(p: vecN, rep: vecN) -> float`

Periodic perlin noise.

simplex() function

`glm.simplex(p: vecN) -> float`

Simplex noise.