geoplex/icosahedron/edge.js

Nested spherical triangles based on a regular icosahedron model of Earth; a library for use with rwt-orthographic-earth GIS layers

/* Copyright (c) 2022 Read Write Tools. */
import*as st from'../spherical-earth/spherical-trigonometry.js';import expect from'softlib/expect.js';const EARTH_RADIUS=6371;export default class Edge{constructor(t,e,r,i,s){expect(t,'IndexedCoordinates'),expect(e,'String'),expect(r,'Number'),expect(i,'Vertex'),expect(s,'Vertex'),this.indexedCoordinates=t,this.uid=e,this.terrasect=r,this.vertexA=i,this.vertexB=s,this.edgeLength=this.determineEdgeLength(),this.bias=1,this.neighboringFaces=[]}get formattedID(){return`E(${this.uid})`}getPoints(t){return[this.vertexA.getPoint(t),this.vertexB.getPoint(t)]}determineEdgeLength(){return 6371*st.lengthOfArc(this.vertexA.latitude,this.vertexA.longitude,this.vertexB.latitude,this.vertexB.longitude)}accumulateEdgeStatistics(t,e){for(expect(t,'Array'),expect(e,'Boolean');this.terrasect>t.length-1;)t.push(new Map);var r=t[this.terrasect];const i=this.edgeLength,s=(100*this.bias).toFixed(0)+'%',h=Math.round(i),n=Math.round(i).toLocaleString()+'km';e&&console.log(`terrasect:${this.terrasect}  length:${n}  bias:${s}`);var o=r.get(h);null==o&&(o=0),r.set(h,o+1)}}