// https://d3js.org/d3-polygon/ v1.0.6 Copyright 2019 Mike Bostock !function(n,e){"object"==typeof exports&&"undefined"!=typeof module?e(exports):"function"==typeof define&&define.amd?define(["exports"],e):e((n=n||self).d3=n.d3||{})}(this,function(n){"use strict";function e(n,e){return n[0]-e[0]||n[1]-e[1]}function r(n){for(var e,r,t,o=n.length,f=[0,1],u=2,l=2;l1&&(e=n[f[u-2]],r=n[f[u-1]],t=n[l],(r[0]-e[0])*(t[1]-e[1])-(r[1]-e[1])*(t[0]-e[0])<=0);)--u;f[u++]=l}return f.slice(0,u)}n.polygonArea=function(n){for(var e,r=-1,t=n.length,o=n[t-1],f=0;++rl!=g>l&&u<(i-r)*(l-t)/(g-t)+r&&(h=!h),i=r,g=t;return h},n.polygonHull=function(n){if((o=n.length)<3)return null;var t,o,f=new Array(o),u=new Array(o);for(t=0;t=0;--t)a.push(n[f[l[t]][2]]);for(t=+g;t