/*

 Intro - Example 1.5: Perlin noise walker from The Nature of Code by Daniel Shiffman
 <http://natureofcode.com/book>

 Implemented in C++ by Jacqueline Steck <http://jqln.org>

 Requires Cinder 0.8.4 available at http://libcinder.org

 Check out the project files at https://github.com/jqln/natureofcode_cinder

 Gaussian distribution