星油企业版

static/workers/request/index.js

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+const utils = require('./utils')
+
+console.log('hello worker/////////////////')
+
+
+
+worker.onMessage((msg) => {
+  console.log('[Worker] on appservice message', msg.msg);
+  let ALWAYS = []
+  msg.msg.markes.forEach((item,index)=>{
+	 let distance =  utils.getDistance(msg.msg.coordinate.latitude,msg.msg.coordinate.longitude,item.latitude, item.longitude);
+	 if(distance<Number(msg.msg.radius)){
+		 ALWAYS.push(index)
+	 }
+  });
+  worker.postMessage({
+    msg: ALWAYS,
+    buffer: utils.str2ab('hello arrayBuffer from worker')
+  })
+  console.log(ALWAYS,'距离符合条件的下标')
+  // const buffer = msg.buffer
+  // console.log('[Worker] on appservice buffer length ', buffer)
+  // console.log('[Worker] on appservice buffer', utils.ab2str(buffer))
+})

static/workers/request/utils.js

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+function test() {
+	return 1 + 1
+}
+/**
+ * 获取两个经纬度之间的距离
+ * @param lat1 第一点的纬度
+ * @param lng1 第一点的经度
+ * @param lat2 第二点的纬度
+ * @param lng2 第二点的经度
+ * @returns {Number}
+ */
+function getRad(d) {
+	var PI = Math.PI;
+	return d * PI / 180.0;
+}
+
+function getDistance(lat1, lng1, lat2, lng2) {
+	var f = getRad((lat1 + lat2) / 2);
+	var g = getRad((lat1 - lat2) / 2);
+	var l = getRad((lng1 - lng2) / 2);
+	var sg = Math.sin(g);
+	var sl = Math.sin(l);
+	var sf = Math.sin(f);
+	var s, c, w, r, d, h1, h2;
+	var a = 6378137.0; //The Radius of eath in meter.   
+	var fl = 1 / 298.257;
+	sg = sg * sg;
+	sl = sl * sl;
+	sf = sf * sf;
+	s = sg * (1 - sl) + (1 - sf) * sl;
+	c = (1 - sg) * (1 - sl) + sf * sl;
+	w = Math.atan(Math.sqrt(s / c));
+	r = Math.sqrt(s * c) / w;
+	d = 2 * w * a;
+	h1 = (3 * r - 1) / 2 / c;
+	h2 = (3 * r + 1) / 2 / s;
+	s = d * (1 + fl * (h1 * sf * (1 - sg) - h2 * (1 - sf) * sg));
+	// s = s/1000;   
+	s = s.toFixed(2); //指定小数点后的位数。   
+	return s;
+}
+
+function ab2str(buf) {
+	return String.fromCharCode.apply(null, new Uint16Array(buf));
+}
+
+function str2ab(str) {
+	var buf = new ArrayBuffer(str.length * 2); // 2 bytes for each char
+	var bufView = new Uint16Array(buf);
+	for (var i = 0, strLen = str.length; i < strLen; i++) {
+		bufView[i] = str.charCodeAt(i);
+	}
+	return buf;
+}
+function distance(res){
+	let ALWAYS = [];
+	res.markes.forEach((item,index)=>{
+		 let distance =  utils.getDistance(res.coordinate.latitude,res.coordinate.longitude,item.latitude, item.longitude);
+		 if(distance<1000){
+			 ALWAYS.push(index)
+		 }
+	});
+	return ALWAYS
+}
+
+module.exports = {
+	distance:distance,
+	test: test,
+	ab2str: ab2str,
+	str2ab: str2ab,
+	getDistance: getDistance
+}