<!--
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* @Description: 绘制图形统计圈内点数
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* @Author: Dragon
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* @Date: 2020-12-21 13:19:47
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* @LastEditTime: 2020-12-21 15:03:27
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* @LastEditors: Dragon
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-->
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<template>
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<div>
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<div class="query-wrap">
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<el-button type="primary" @click="drawStart('Polygon')">
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{{ isDraw ? "绘制区域查询人数" : "重新绘制" }}
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</el-button>
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</div>
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<div id="map"></div>
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</div>
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</template>
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<script>
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import "ol/ol.css";
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import { Map, View, Feature } from "ol";
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import { Image as ImageLayer, Vector as VectorLayer } from "ol/layer";
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import XYZ from "ol/source/XYZ";
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import { ImageStatic, Vector as VectorSource } from "ol/source";
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import { getCenter } from "ol/extent";
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import OlLayerTile from "ol/layer/Tile.js";
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import { Projection } from "ol/proj";
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import Draw from "ol/interaction/Draw";
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import { Point } from "ol/geom";
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import { Icon, Style, Text, Fill, Stroke } from "ol/style";
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import staticMap from "@/assets/img/car.png";
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import img from "@/assets/img/car.png";
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export default {
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data() {
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return {
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map: null, // 地图
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imgx: 0, // 当前地图宽
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imgy: 0, // 当前地图高
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isDraw: true, // 是否绘制
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draw: null,
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source: null,
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vector: null,
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styles: [
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new Style({
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stroke: new Stroke({
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color: "rgba(255,0,0,0.6)",
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width: 2,
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}),
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fill: new Fill({
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color: "rgba(255,0,0,0.3)",
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}),
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}),
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],
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persons: [],
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polygon: [],
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polygonPersons: [],
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features: [],
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feature: null,
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vectorSource: new VectorSource(),
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timer: null,
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};
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},
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watch: {
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persons(val) {
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if (val) {
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this.setFeature();
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}
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},
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},
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methods: {
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// 初始化地图
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initMap() {
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let extent = [0, 0, this.imgx, this.imgy];
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let projection = new Projection({
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extent: extent,
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});
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let $this = this;
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// 默认地图
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let mapLayer = new OlLayerTile({
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zIndex: 4,
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title: "影像",
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source: new XYZ({
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url: "https://webmap-tile.sf-express.com/MapTileService/rt?fetchtype=static&x={x}&y={y}&z={z}&project=sfmap&pic_size=256&pic_type=png8&data_name=361100&data_format=merged-dat&data_type=normal", // 行政区划
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}),
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});
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// 绘制点
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let featureLayer = new VectorLayer({
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source: this.vectorSource,
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});
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this.map = new Map({
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target: "map",
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layers: [
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mapLayer, // 展示地图层
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featureLayer, // 点
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],
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view: new View({
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projection: "EPSG:4326",
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center: [0, 0],
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zoom: 2,
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maxZoom: 13,
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}),
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});
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var view = this.map.getView();
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// view.setCenter([115.85883507433789, 28.708432053474827])
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view.setCenter([115.9032747077233, 28.67433116990186]);
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this.source = new VectorSource({ wrapX: false });
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this.vector = new VectorLayer({
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source: this.source,
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style: this.styles,
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});
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this.map.addLayer(this.vector);
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},
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// 点
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setFeature() {
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let that = this;
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that.features = [];
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that.vectorSource.clear();
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that.persons.map((item) => {
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that.feature = new Feature({
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geometry: new Point([item.x, item.y]),
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name: item.name,
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});
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// 设置Feature的样式，使用小旗子图标
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that.feature.setStyle(
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new Style({
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image: new Icon({
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anchor: [0, 1],
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src: img,
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}),
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text: new Text({
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// 位置
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textAlign: "center",
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// 基准线
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textBaseline: "middle",
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// 文字样式
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font: "normal 20px 微软雅黑",
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// 文本内容
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text: item.name,
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// 文本填充样式（即文字颜色）
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fill: new Fill({ color: "#aa3300" }),
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stroke: new Stroke({ color: "#ffcc33", width: 2 }),
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}),
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})
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);
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that.features.push(that.feature);
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});
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that.vectorSource.addFeatures(that.features);
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},
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// 开始绘制多边形
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drawStart(type) {
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let that = this;
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if (this.isDraw) {
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this.isDraw = false;
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this.draw = new Draw({
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source: this.source,
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type: type,
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});
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this.map.addInteraction(this.draw);
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this.draw.on("drawend", function (evt) {
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that.drawingEnd(evt);
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});
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} else {
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this.source.clear();
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this.map.removeInteraction(this.draw);
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this.isDraw = true;
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this.polygon = [];
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this.polygonPersons = [];
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}
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},
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// 构建多边形结束
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drawingEnd(evt) {
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let that = this;
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const geo = evt.feature.getGeometry();
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const t = geo.getType();
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if (t === "Polygon") {
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// 获取坐标点
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const points = geo.getCoordinates();
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points[0].map((item) => {
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that.polygon.push({ lng: item[0], lat: item[1] });
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});
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console.log(this.polygon,1111);
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for (let i = 0; i < this.persons.length; i++) {
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let boxFlag = this.isRegion(this.persons[i].x, this.persons[i].y, this.polygon);
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if (boxFlag) {
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this.polygonPersons.push(this.persons[i]);
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}
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}
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this.$message({
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type: "success",
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message: `区域内有${this.polygonPersons.length}人`,
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});
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console.warn(this.polygonPersons, `区域内有${this.polygonPersons.length}人`);
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debugger;
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this.map.removeInteraction(this.draw);
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}
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},
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// 验证点是否在区域内
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isRegion(lon, lat, aPoints) {
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let num = 0,
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iCount;
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let dLon1, dLon2, dLat1, dLat2, dLon;
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if (aPoints.length < 3) return false;
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iCount = aPoints.length;
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for (let i = 0; i < iCount; i++) {
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if (i == iCount - 1) {
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dLon1 = aPoints[i].lng;
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dLat1 = aPoints[i].lat;
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dLon2 = aPoints[0].lng;
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dLat2 = aPoints[0].lat;
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} else {
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dLon1 = aPoints[i].lng;
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dLat1 = aPoints[i].lat;
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dLon2 = aPoints[i + 1].lng;
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dLat2 = aPoints[i + 1].lat;
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}
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if ((lat >= dLat1 && lat < dLat2) || (lat >= dLat2 && lat < dLat1)) {
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if (Math.abs(dLat1 - dLat2) > 0) {
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dLon = dLon1 - ((dLon1 - dLon2) * (dLat1 - lat)) / (dLat1 - dLat2);
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if (dLon < lon) num++;
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}
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}
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}
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if (num % 2 != 0) return true;
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return false;
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},
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},
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mounted() {
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let img = new Image();
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img.src = staticMap;
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let that = this;
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img.onload = function (res) {
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that.imgx = res.target.width;
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that.imgy = res.target.height;
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that.initMap();
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};
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},
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created() {
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let that = this;
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that.timer = setInterval(function () {
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that.persons = [
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{ id: 1, name: "点-1", x: 497.08, y: 187.88, z: 0 },
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{ id: 2, name: "点-2", x: 725.32, y: 565.88, z: 0 },
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{ id: 3, name: "点-3", x: 643.24, y: 503.96, z: 0 },
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];
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}, 2000);
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},
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beforeDestroy() {
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clearInterval(this.timer);
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},
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};
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</script>
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<style>
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#map {
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width: 100%;
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height: calc(100vh - 50px);
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}
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</style>
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