Finishing off Chapter 2 on forces, let's look at an "N-Body Simulation" where all movers experience gravitational attraction with all other movers!
- Wikipedia entry on the law of universal gravitation 
- Link to chapter 2.10 - Everything Attracts (or Repels) Everything 
- Link to p5 Reference entry on the rotate() method 
- Research paper by Montaldi and Steckles 
- Dan Gries' tool for animating a range of different N-Body Choreographies 
- Previous Nature of Code video on gravitational attraction 
- Nature of Code video on simulating gravity and wind forces 
- Nature of Code video on creating agents that can move themselves 
- Nature of Code video covering the basics of angles and rotation in p5.js 
- Coding Challenge to implement a Quadtree data structure and visualize it in p5.js 
- Editingby Mathieu Blanchette 
- Animationsby Jason Heglund 

