60 lines
1.6 KiB
JavaScript
60 lines
1.6 KiB
JavaScript
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/**
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* 运营区电子围栏：解析边界、计算中心点，供 map.includePoints 使用
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*/
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function toMapPoint(lat, lng) {
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const latitude = parseFloat(lat)
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const longitude = parseFloat(lng)
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if (!isFinite(latitude) || !isFinite(longitude)) return null
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if (Math.abs(latitude) > 90 || Math.abs(longitude) > 180) return null
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return { latitude, longitude }
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}
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export function parseBoundaryStrToPoints(boundaryStr) {
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if (!boundaryStr || typeof boundaryStr !== 'string') return []
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try {
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const coords = JSON.parse(boundaryStr)
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if (!Array.isArray(coords)) return []
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return coords
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.map((coord) => {
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if (!Array.isArray(coord) || coord.length < 2) return null
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return toMapPoint(coord[1], coord[0])
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})
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.filter(Boolean)
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} catch (e) {
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return []
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}
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}
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export function collectOperationAreaPoints(polyline) {
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const list = Array.isArray(polyline) ? polyline : []
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const points = []
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list.forEach((poly) => {
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if (!poly || !poly.isOperationArea || !Array.isArray(poly.points)) return
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poly.points.forEach((pt) => {
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if (!pt) return
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const p = toMapPoint(pt.latitude, pt.longitude)
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if (p) points.push(p)
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})
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})
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return points
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}
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export function calcBoundsCenter(points) {
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if (!points || !points.length) return null
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let minLat = Infinity
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let maxLat = -Infinity
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let minLng = Infinity
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let maxLng = -Infinity
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points.forEach((p) => {
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minLat = Math.min(minLat, p.latitude)
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maxLat = Math.max(maxLat, p.latitude)
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minLng = Math.min(minLng, p.longitude)
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maxLng = Math.max(maxLng, p.longitude)
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})
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return {
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latitude: (minLat + maxLat) / 2,
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longitude: (minLng + maxLng) / 2
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}
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}
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