Appendix B. Perlin Noise

Perlin noise is the algorithm for generating a series of slowly changing random values that behave just like the parameters of live motion of a living creature. It is one of the most used algorithms in computer graphics. It is used for random object movement, texture generation, and so on. Many examples in the book are essentially based on using Perlin noise. In this appendix, we will find out what Perlin noise is and how to use it in openFrameworks projects; we will cover the following topics:

• Perlin noise basics

• Using the ofNoise() function

• Space-coherent noise