_npm/d3-polygon@3.0.1/bbafde58.js

/**
 * Bundled by jsDelivr using Rollup v2.79.1 and Terser v5.19.2.
 * Original file: /npm/d3-polygon@3.0.1/src/index.js
 *
 * Do NOT use SRI with dynamically generated files! More information: https://www.jsdelivr.com/using-sri-with-dynamic-files
 */
function n(n){for(var r,t=-1,o=n.length,e=n[o-1],l=0;++t<o;)r=e,e=n[t],l+=r[1]*e[0]-r[0]*e[1];return l/2}function r(n){for(var r,t,o=-1,e=n.length,l=0,u=0,f=n[e-1],a=0;++o<e;)r=f,f=n[o],a+=t=r[0]*f[1]-f[0]*r[1],l+=(r[0]+f[0])*t,u+=(r[1]+f[1])*t;return[l/(a*=3),u/a]}function t(n,r){return n[0]-r[0]||n[1]-r[1]}function o(n){const r=n.length,t=[0,1];let o,e=2;for(o=2;o<r;++o){for(;e>1&&(l=n[t[e-2]],u=n[t[e-1]],f=n[o],(u[0]-l[0])*(f[1]-l[1])-(u[1]-l[1])*(f[0]-l[0])<=0);)--e;t[e++]=o}var l,u,f;return t.slice(0,e)}function e(n){if((e=n.length)<3)return null;var r,e,l=new Array(e),u=new Array(e);for(r=0;r<e;++r)l[r]=[+n[r][0],+n[r][1],r];for(l.sort(t),r=0;r<e;++r)u[r]=[l[r][0],-l[r][1]];var f=o(l),a=o(u),g=a[0]===f[0],h=a[a.length-1]===f[f.length-1],i=[];for(r=f.length-1;r>=0;--r)i.push(n[l[f[r]][2]]);for(r=+g;r<a.length-h;++r)i.push(n[l[a[r]][2]]);return i}function l(n,r){for(var t,o,e=n.length,l=n[e-1],u=r[0],f=r[1],a=l[0],g=l[1],h=!1,i=0;i<e;++i)t=(l=n[i])[0],(o=l[1])>f!=g>f&&u<(a-t)*(f-o)/(g-o)+t&&(h=!h),a=t,g=o;return h}function u(n){for(var r,t,o=-1,e=n.length,l=n[e-1],u=l[0],f=l[1],a=0;++o<e;)r=u,t=f,r-=u=(l=n[o])[0],t-=f=l[1],a+=Math.hypot(r,t);return a}export{n as polygonArea,r as polygonCentroid,l as polygonContains,e as polygonHull,u as polygonLength};export default null;