Experiment in creating regular grids from circular paths, step 1: General concept and reference grids.
forked from mootari's block: Squaring the circle, part 1
https://cdnjs.cloudflare.com/ajax/libs/d3/4.3.0/d3.js
https://cdnjs.cloudflare.com/ajax/libs/dat-gui/0.6.2/dat.gui.min.js