294 lines
7.9 KiB
JavaScript
294 lines
7.9 KiB
JavaScript
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/**
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* 路线可视化 Composable
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* 负责在 Cesium 地图上绘制路线和标签
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*/
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import { ref } from 'vue'
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import * as Cesium from 'cesium'
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import { ROUTE_STYLES, LABEL_STYLE } from '../constants/routeStyles'
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import { formatDistance, formatDuration } from '../utils/geoUtils'
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export function useRouteVisualization() {
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// 路线实体集合
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const routeEntities = ref([])
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const labelEntities = ref([])
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/**
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* 将 polyline 字符串转换为 Cartesian3 数组
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* @param {string} polylineString - 高德 polyline 格式
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* @returns {Array<Cesium.Cartesian3>}
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*/
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const transformToCartesian3 = (polylineString) => {
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if (!polylineString) return []
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try {
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return polylineString
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.split(';')
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.map(pair => {
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const [lon, lat] = pair.split(',').map(Number)
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if (isNaN(lon) || isNaN(lat)) return null
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return Cesium.Cartesian3.fromDegrees(lon, lat, 0)
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})
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.filter(Boolean)
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} catch (error) {
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console.error('[useRouteVisualization] polyline 转换失败:', error)
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return []
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}
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}
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/**
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* 绘制单条路线
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* @param {Cesium.Viewer} viewer - Cesium viewer 实例
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* @param {Object} routeData - 路线数据
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* @param {Object} styleOptions - 样式选项
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* @returns {Cesium.Entity} 路线实体
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*/
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const drawRoute = (viewer, routeData, styleOptions = {}) => {
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if (!viewer || !routeData || !routeData.polyline) {
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console.warn('[useRouteVisualization] 参数无效')
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return null
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}
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const positions = transformToCartesian3(routeData.polyline)
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if (positions.length < 2) {
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console.warn('[useRouteVisualization] 路线点数不足')
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return null
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}
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// 获取样式
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const type = routeData.isFallback ? 'fallback' : (routeData.type || 'personnel')
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const style = ROUTE_STYLES[type] || ROUTE_STYLES.personnel
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// 创建路线实体
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const entity = viewer.entities.add({
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polyline: {
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positions: positions,
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width: styleOptions.width || style.width,
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material: styleOptions.material || style.material(viewer),
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clampToGround: true,
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classificationType: Cesium.ClassificationType.TERRAIN
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},
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properties: {
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type: 'route',
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routeType: type,
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routeId: routeData.id,
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routeName: routeData.name,
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distance: routeData.distance,
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duration: routeData.duration,
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isFallback: routeData.isFallback || false
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}
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})
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routeEntities.value.push(entity)
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console.log(`[useRouteVisualization] 绘制路线: ${routeData.name} (${type})`)
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return entity
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}
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/**
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* 绘制多条路线
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* @param {Cesium.Viewer} viewer - Cesium viewer 实例
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* @param {Array} routesArray - 路线数组
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* @returns {Array<Cesium.Entity>} 路线实体数组
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*/
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const drawMultipleRoutes = (viewer, routesArray) => {
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if (!viewer || !routesArray || routesArray.length === 0) {
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console.warn('[useRouteVisualization] 参数无效')
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return []
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}
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console.log(`[useRouteVisualization] 绘制 ${routesArray.length} 条路线`)
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const entities = []
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routesArray.forEach((route, index) => {
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try {
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// 绘制路线
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const routeEntity = drawRoute(viewer, route)
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if (routeEntity) {
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entities.push(routeEntity)
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// 添加标签
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const labelEntity = addRouteLabel(viewer, route)
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if (labelEntity) {
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entities.push(labelEntity)
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}
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}
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} catch (error) {
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console.error(`[useRouteVisualization] 绘制路线 ${route.name} 失败:`, error)
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}
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})
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console.log(`[useRouteVisualization] 成功绘制 ${entities.length / 2} 条路线`)
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return entities
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}
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/**
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* 添加路线标签（显示距离和时间）
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* @param {Cesium.Viewer} viewer - Cesium viewer 实例
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* @param {Object} routeData - 路线数据
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* @returns {Cesium.Entity} 标签实体
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*/
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const addRouteLabel = (viewer, routeData) => {
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if (!viewer || !routeData || !routeData.polyline) {
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return null
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}
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const positions = transformToCartesian3(routeData.polyline)
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if (positions.length < 2) {
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return null
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}
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// 计算中点位置
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const midIndex = Math.floor(positions.length / 2)
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const labelPosition = positions[midIndex]
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// 格式化文本
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const distanceText = formatDistance(routeData.distance)
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const durationText = formatDuration(routeData.duration)
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const labelText = `${distanceText} | ${durationText}`
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// 添加降级标识
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const finalText = routeData.isFallback ? `${labelText} (直线)` : labelText
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// 获取标签颜色
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const type = routeData.isFallback ? 'fallback' : (routeData.type || 'personnel')
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const style = ROUTE_STYLES[type] || ROUTE_STYLES.personnel
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// 创建标签实体
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const entity = viewer.entities.add({
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position: labelPosition,
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label: {
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text: finalText,
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font: LABEL_STYLE.font,
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fillColor: LABEL_STYLE.fillColor,
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outlineColor: LABEL_STYLE.outlineColor,
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outlineWidth: LABEL_STYLE.outlineWidth,
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style: LABEL_STYLE.style,
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pixelOffset: LABEL_STYLE.pixelOffset,
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disableDepthTestDistance: LABEL_STYLE.disableDepthTestDistance,
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heightReference: LABEL_STYLE.heightReference,
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verticalOrigin: LABEL_STYLE.verticalOrigin,
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// 添加背景
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showBackground: true,
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backgroundColor: Cesium.Color.BLACK.withAlpha(0.5),
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backgroundPadding: new Cesium.Cartesian2(7, 5)
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},
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properties: {
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type: 'routeLabel',
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routeId: routeData.id,
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routeName: routeData.name
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}
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})
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labelEntities.value.push(entity)
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return entity
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}
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/**
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* 清除所有路线实体
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* @param {Cesium.Viewer} viewer - Cesium viewer 实例
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*/
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const clearRoutes = (viewer) => {
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if (!viewer) return
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// 清除路线实体
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routeEntities.value.forEach(entity => {
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if (entity) {
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viewer.entities.remove(entity)
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}
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})
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// 清除标签实体
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labelEntities.value.forEach(entity => {
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if (entity) {
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viewer.entities.remove(entity)
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}
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})
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routeEntities.value = []
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labelEntities.value = []
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console.log('[useRouteVisualization] 已清除所有路线')
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}
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/**
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* 清除指定路线
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* @param {Cesium.Viewer} viewer - Cesium viewer 实例
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* @param {string} routeId - 路线 ID
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*/
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const clearRoute = (viewer, routeId) => {
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if (!viewer || !routeId) return
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// 清除路线实体
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routeEntities.value = routeEntities.value.filter(entity => {
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if (entity && entity.properties && entity.properties.routeId === routeId) {
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viewer.entities.remove(entity)
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return false
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}
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return true
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})
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// 清除标签实体
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labelEntities.value = labelEntities.value.filter(entity => {
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if (entity && entity.properties && entity.properties.routeId === routeId) {
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viewer.entities.remove(entity)
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return false
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}
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return true
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})
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console.log(`[useRouteVisualization] 已清除路线: ${routeId}`)
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}
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/**
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* 获取所有路线的边界框
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* @param {Array} routesArray - 路线数组
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* @returns {Array} 边界点数组 [{ lon, lat }]
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*/
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const getRoutesBounds = (routesArray) => {
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const allPoints = []
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routesArray.forEach(route => {
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if (route.polyline) {
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const positions = transformToCartesian3(route.polyline)
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positions.forEach(pos => {
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const carto = Cesium.Cartographic.fromCartesian(pos)
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allPoints.push({
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lon: Cesium.Math.toDegrees(carto.longitude),
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lat: Cesium.Math.toDegrees(carto.latitude)
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})
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})
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}
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})
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return allPoints
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}
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return {
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// 状态
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routeEntities,
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labelEntities,
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// 方法
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drawRoute,
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drawMultipleRoutes,
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addRouteLabel,
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clearRoutes,
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clearRoute,
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getRoutesBounds,
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transformToCartesian3,
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// 样式常量
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ROUTE_STYLES
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}
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}
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export default useRouteVisualization
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