import * as Cesium from 'cesium';
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import data2 from '@/assets/images/home/homeRight/data2.png';
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import data1 from '@/assets/images/home/homeRight/data1.png';
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import jiangxishi from '@/assets/geojson/jiangxishi.json';
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import jiangxi from '@/assets/geojson/jiangxi.json';
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import zg from '@/assets/geojson/zg.json';
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import MapPopUpBox from '@/views/Home/MapPopUpBox.vue';
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import { render } from 'vue';
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/**
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* 机巢聚合功能
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*/
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export const useAggregation = () => {
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const scalingJudgment = [
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{ name: '县', value: [0, 48651], gJson: null },
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{ name: '市', value: [48651, 314863], gJson: jiangxishi },
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{ name: '省', value: [314863, 1169651], gJson: jiangxi },
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{ name: '国', value: [1169651, 37962800], gJson: zg },
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];
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let viewer = null;
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const active = ref('');
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let handler = null;
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let labelDiv = null;
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let positionC3 = null;
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const init = () => {
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determineScaling();
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viewer.camera.moveEnd.addEventListener(() => {
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determineScaling();
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});
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};
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// 确定缩放比例
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const determineScaling = () => {
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let height = viewer.camera.positionCartographic.height;
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// 根据高度展示对应的 gJson
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for (let item of scalingJudgment) {
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if (height > item.value[0] && height <= item.value[1]) {
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if (active.value !== item.name) {
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removeEntities();
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removeLabel();
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active.value = item.name;
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item.gJson ? aggregation(item) : splashed();
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}
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break;
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}
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}
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};
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//散点机巢
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function splashed() {
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for (let i = 0; i < 50; i++) {
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viewer.entities.add({
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position: Cesium.Cartesian3.fromDegrees(
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115.89 + Math.random() * 0.2,
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28.68 + Math.random() * 0.2
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),
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label: {
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// 随机整数
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text: Math.floor(Math.random() * 100) + '号机巢',
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font: '14pt monospace',
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fillColor: Cesium.Color.WHITE,
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outlineColor: Cesium.Color.BLACK,
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outlineWidth: 2,
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style: Cesium.LabelStyle.FILL_AND_OUTLINE,
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verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
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pixelOffset: new Cesium.Cartesian2(0, -9),
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},
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billboard: {
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image: new Cesium.ConstantProperty(data1),
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width: 24,
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height: 24,
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},
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});
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}
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}
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// 聚合机巢
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const aggregation = item => {
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const featuresList = item.gJson.features.map(item => ({
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name: item.properties.name,
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position: item.properties.center,
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}));
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// 遍历特征并添加实体
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featuresList.forEach(feature => {
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if (!feature.position) return;
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const position = Cesium.Cartesian3.fromDegrees(feature.position[0], feature.position[1]);
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viewer.entities.add({
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id: feature.id,
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position: position,
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label: {
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// 随机整数
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text: feature.name + Math.floor(Math.random() * 100),
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font: '14pt monospace',
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fillColor: Cesium.Color.WHITE,
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outlineColor: Cesium.Color.BLACK,
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outlineWidth: 2,
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style: Cesium.LabelStyle.FILL_AND_OUTLINE,
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verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
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pixelOffset: new Cesium.Cartesian2(0, -9),
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},
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billboard: {
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image: new Cesium.ConstantProperty(data2),
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width: 24,
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height: 24,
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},
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properties: {
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id: feature.id,
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customData: {
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name: feature.name,
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},
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},
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});
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});
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// 加载新的 GeoJSON 数据
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Cesium.GeoJsonDataSource.load(item.gJson).then(dataSource => {
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viewer.dataSources.add(dataSource);
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item.dataSource = dataSource; // 保存数据源以便后续删除
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// 获取数据源中的实体
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const entities = dataSource.entities.values;
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entities.forEach(entity => {
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entity.polygon.material = new Cesium.ColorMaterialProperty(
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Cesium.Color.YELLOW.withAlpha(0) // 透明填充
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);
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entity.polygon.outline = new Cesium.ConstantProperty(true); // 显示边框
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entity.polygon.outlineColor = new Cesium.ConstantProperty(Cesium.Color.YELLOW); // 黑色边框
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});
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});
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};
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const getLabelDom = () => {
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const vNode = h(MapPopUpBox, { data: '参数',removeLabel });
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const tooltipContainer = document.createElement('div');
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tooltipContainer.style.position = 'absolute';
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tooltipContainer.style.transform = 'translateY(-50%)';
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tooltipContainer.style.pointerEvents = 'none';
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document.querySelector('.page-index').append(tooltipContainer);
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render(vNode, tooltipContainer);
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return tooltipContainer;
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};
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const labelBox = () => {
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if (!labelDiv) {
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labelDiv = getLabelDom();
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}
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const screenPosition = viewer.scene.cartesianToCanvasCoordinates(positionC3);
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if (screenPosition) {
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labelDiv.style.left = `${screenPosition.x}px`;
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labelDiv.style.top = `${screenPosition.y}px`;
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}
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};
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const clickFun = click => {
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const pickedObject = viewer.scene.pick(click.position);
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if (Cesium.defined(pickedObject) && pickedObject.id) {
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const entity = pickedObject.id;
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positionC3 = entity.position._value;
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viewer.scene.postRender.addEventListener(labelBox);
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}
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};
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const removeEntities = () => {
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viewer.dataSources.removeAll(true);
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viewer.entities.removeAll();
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};
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const removeLabel = () => {
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viewer.scene.postRender.removeEventListener(labelBox);
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if (labelDiv && labelDiv.parentNode) {
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labelDiv.parentNode.removeChild(labelDiv);
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labelDiv = null;
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}
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};
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onUnmounted(() => {
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removeEntities();
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removeLabel();
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handler?.removeInputAction(Cesium.ScreenSpaceEventType.LEFT_CLICK);
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});
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onMounted(() => {
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nextTick(() => {
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viewer = window.$viewer;
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handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
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handler.setInputAction(clickFun, Cesium.ScreenSpaceEventType.LEFT_CLICK);
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init();
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});
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});
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};
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