/**
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* 网格绘制
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*/
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import { map } from './index_old';
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import calculate from './calculate';
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import { Legend } from '@/model/Legend';
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import { getHexColor, getColorBetweenTwoColors } from '../color';
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/**
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* 角度增减，确保角度处于0 - 360度之间
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* @param {number} angle 原角度
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* @param {number} offset 偏移量
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*/
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function plusAngle(angle, offset) {
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const result = angle + offset;
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if (result > 360) {
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return result - 360;
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} else if (result < 0) {
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return result + 360;
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} else {
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return result;
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}
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}
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/**
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* 根据网格中心点，生成正方形网格4个顶点的坐标
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* @param {Array} points 网格中心点经纬度数组
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*/
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function parseGridPoint(points) {
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if (points.length < 2) throw new Error('坐标点数量小于2');
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const p1 = points[0];
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const p2 = points[1];
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// 两中心点间的角度
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const angle = calculate.getAngle(p1[0], p1[1], p2[0], p2[1]);
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// const angle = calculate.bearing(
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// { latitude: p1[0], longitude: p1[1] },
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// { latitude: p2[0], longitude: p2[1] }
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// );
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// 两中心点间的距离
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const dis = calculate.getDistance(p1[0], p1[1], p2[0], p2[1]);
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// 网格正方形对角线的一半长度
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const halfDiagonal = Math.sqrt((dis / 2) * (dis / 2) * 2);
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// 计算首个正方形各顶点相对于中心点的角度，得到正方形各顶点的坐标
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const angle1 = plusAngle(angle, 45);
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const gp1 = calculate.getLatLon(p1, halfDiagonal, angle1);
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const angle2 = plusAngle(angle1, 90);
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const gp2 = calculate.getLatLon(p1, halfDiagonal, angle2);
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const angle3 = plusAngle(angle2, 90);
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const gp3 = calculate.getLatLon(p1, halfDiagonal, angle3);
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const angle4 = plusAngle(angle3, 90);
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const gp4 = calculate.getLatLon(p1, halfDiagonal, angle4);
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// 计算4个顶点分别与中心点的经纬度差值
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const diff = {
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diff1: {
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dx: gp1[0] - p1[0],
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dy: gp1[1] - p1[1]
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},
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diff2: {
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dx: gp2[0] - p1[0],
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dy: gp2[1] - p1[1]
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},
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diff3: {
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dx: gp3[0] - p1[0],
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dy: gp3[1] - p1[1]
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},
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diff4: {
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dx: gp4[0] - p1[0],
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dy: gp4[1] - p1[1]
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}
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};
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// 得到所有正方形网格的4个顶点信息
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return points.map((p) => {
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return [
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[p[0] + diff.diff1.dx, p[1] + diff.diff1.dy],
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[p[0] + diff.diff2.dx, p[1] + diff.diff2.dy],
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[p[0] + diff.diff3.dx, p[1] + diff.diff3.dy],
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[p[0] + diff.diff4.dx, p[1] + diff.diff4.dy]
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];
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});
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}
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/**
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* 文本标记
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* 可修改position
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*/
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function textMaker(position, text, anchor, type) {
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let style = {};
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if (type == 'data') {
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style = {
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'font-size': '12px',
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'text-align': 'center',
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color: 'white',
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background: '#122b54a9',
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'text-shadow': 'black 2px 2px 2px',
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border: '0px',
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'margin-top': '4px'
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};
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} else if (type == 'rank') {
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style = {
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'font-size': '14px',
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'text-align': 'center',
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color: 'white',
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background: 'transparent',
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'text-shadow': 'black 2px 2px 2px',
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'border-radius': '2px',
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border: '1px solid #122b54a9',
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'margin-bottom': '4px'
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};
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}
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// eslint-disable-next-line no-undef
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return new AMap.Text({
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text: text,
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anchor,
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position: position,
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style: style
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});
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}
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/**
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* 海量文本标注
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*/
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function textLabelMarker(position, text, direction, style) {
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// eslint-disable-next-line no-undef
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return new AMap.LabelMarker({
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position: position,
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zooms: [10, 20],
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opacity: 1,
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zIndex: 2,
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// icon: {
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// image: 'https://a.amap.com/jsapi_demos/static/images/poi-marker.png',
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// anchor: 'bottom-center',
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// size: [25, 34],
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// clipOrigin: [459, 92],
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// clipSize: [50, 68]
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// },
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text: {
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// 注意内容格式必须是string
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content: text ? text + '' : '',
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direction: direction ? direction : 'center',
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style: {
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'border-radius': '.25rem',
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fontSize: 12,
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fillColor: '#fff',
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strokeColor: 'rgba(0, 0, 0, 1)',
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strokeWidth: 4,
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// backgroundColor: '#122b54a9',
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padding: [3, 10],
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// backgroundColor: 'yellow',
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borderColor: '#ccc',
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borderWidth: 30
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}
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}
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});
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}
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export default {
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parseGridPoint,
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/**
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* 绘制网格风险图
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* @param {*} points
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*/
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drawRectangle(points) {
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const gridViews = [];
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points.forEach((p) => {
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const { lb, rt, c } = p;
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let pList = [lb, rt].map((v) => {
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// eslint-disable-next-line no-undef
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return new AMap.LngLat(v[0], v[1]);
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});
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// eslint-disable-next-line no-undef
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var bounds = new AMap.Bounds(...pList);
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// eslint-disable-next-line no-undef
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var rectangle = new AMap.Rectangle({
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bounds: bounds,
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strokeColor: '#ffffffff',
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strokeWeight: 1,
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strokeOpacity: 1,
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// strokeStyle还支持 solid
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strokeStyle: 'solid',
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fillColor: '#990D0D',
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fillOpacity: 0.8,
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cursor: 'pointer',
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zIndex: 50
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});
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gridViews.push(rectangle);
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});
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map.add(gridViews);
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map.setFitView(gridViews);
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},
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/**
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* 绘制一组多边形
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* @param {*} points
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*/
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drawPolylines(points) {
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const gridViews = [];
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points.forEach((p) => {
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let path = p.map((v) => {
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// eslint-disable-next-line no-undef
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return new AMap.LngLat(v[0], v[1]);
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});
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//创建多边形 Polygon 实例
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// eslint-disable-next-line no-undef
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var polygon = new AMap.Polygon({
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path: path, //路径
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fillColor: '#fff', //多边形填充颜色
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strokeWeight: 1, //线条宽度，默认为 2
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strokeColor: 'white', //线条颜色
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fillOpacity: 0
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});
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gridViews.push(polygon);
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});
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map.add(gridViews);
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map.setFitView(gridViews);
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return gridViews;
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},
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drawGridText(points, textViews, anchor, type) {
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if (textViews) {
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points.forEach((p, i) => {
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textViews[i].setPosition(p.lnglat_GD);
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textViews[i].setText(p.data);
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});
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return { textViews };
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} else {
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const _textViews = [];
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points.forEach((p) => {
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const m = textMaker(p.lnglat_GD, p.data, anchor, type);
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_textViews.push(m);
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});
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map.add(_textViews);
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return { textViews: _textViews };
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}
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},
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drawGridTextLabel(points, textViews, labelsLayer, direction) {
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if (textViews) {
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points.forEach((p, i) => {
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textViews[i].setPosition(p.lnglat_GD);
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textViews[i].setText({
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content: p.data ? p.data + '' : ''
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});
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});
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return { textViews, labelsLayer };
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} else {
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// 创建一个 LabelsLayer 实例来承载 LabelMarker，[LabelsLayer 文档](https://lbs.amap.com/api/jsapi-v2/documentation#labelslayer)
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// eslint-disable-next-line no-undef
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const labelsLayer = new AMap.LabelsLayer({
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zooms: [12, 20],
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zIndex: 1000,
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// 开启标注避让，默认为开启，v1.4.15 新增属性
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collision: false,
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// 开启标注淡入动画，默认为开启，v1.4.15 新增属性
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animation: false
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});
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const _textViews = [];
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points.forEach((p) => {
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const m = textLabelMarker(p.lnglat_GD, p.data, direction);
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_textViews.push(m);
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// 将 LabelMarker 实例添加到 LabelsLayer 上
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labelsLayer.add(m);
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});
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map.add(labelsLayer);
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// map.on('zoomend', () => {
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// console.log(map.getZoom());
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// });
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return { textViews: _textViews, labelsLayer };
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}
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},
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drawGridColor(gridViews, texts, factorName) {
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gridViews.forEach((g, i) => {
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const data = parseFloat(texts[i]);
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const { color, nextColor, range, nextRange } =
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Legend.getStandardColorAndNext(factorName, data);
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const ratio = (data - range) / (nextRange - range);
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const _color = getColorBetweenTwoColors(
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color.map((v) => v * 255),
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nextColor.map((v) => v * 255),
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ratio
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);
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g.setOptions({
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fillColor: _color,
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fillOpacity: color[3] == 0 ? 0 : 0.7
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});
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});
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},
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drawGridColorCustom(gridViews, texts) {
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var max, min;
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texts.forEach((t) => {
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if (!t) return;
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if (!max || t > max) {
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max = t;
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}
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if (!min || t < min) {
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min = t;
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}
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});
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gridViews.forEach((g, i) => {
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const data = parseFloat(texts[i]);
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const { color, nextColor, range, nextRange } =
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Legend.getCustomColorAndNext(data, min, max);
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const ratio = (data - range) / (nextRange - range);
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const _color = getColorBetweenTwoColors(
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color.map((v) => v * 255),
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nextColor.map((v) => v * 255),
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ratio
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);
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g.setOptions({
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fillColor: _color,
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// fillOpacity: color[3]
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fillOpacity: color[3] == 0 ? 0 : 0.7
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});
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});
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}
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};
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