export function isPointInCircle(point, circle = {}) {
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//检查类型是否正确
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if (!(point instanceof BMap.Point) || !(circle instanceof BMap.Circle)) {
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return false
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}
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//point与圆心距离小于圆形半径，则点在圆内，否则在圆外
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var c = circle.getCenter()
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var r = circle.getRadius()
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var dis = getDistance(point, c)
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if (dis <= r) {
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return true
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} else {
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return false
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}
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}
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function getDistance(point1, point2) {
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var EARTHRADIUS = 6370996.81
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//判断类型
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if (!(point1 instanceof BMap.Point) || !(point2 instanceof BMap.Point)) {
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return 0
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}
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point1.lng = _getLoop(point1.lng, -180, 180)
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point1.lat = _getRange(point1.lat, -74, 74)
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point2.lng = _getLoop(point2.lng, -180, 180)
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point2.lat = _getRange(point2.lat, -74, 74)
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var x1, x2, y1, y2
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x1 = degreeToRad(point1.lng)
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y1 = degreeToRad(point1.lat)
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x2 = degreeToRad(point2.lng)
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y2 = degreeToRad(point2.lat)
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return (
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EARTHRADIUS *
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Math.acos(
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Math.sin(y1) * Math.sin(y2) +
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Math.cos(y1) * Math.cos(y2) * Math.cos(x2 - x1)
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)
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)
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}
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function _getLoop(v, a, b) {
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while (v > b) {
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v -= b - a
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}
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while (v < a) {
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v += b - a
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}
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return v
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}
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function _getRange(v, a, b) {
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if (a != null) {
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v = Math.max(v, a)
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}
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if (b != null) {
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v = Math.min(v, b)
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}
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return v
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}
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function degreeToRad(degree) {
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return (Math.PI * degree) / 180
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}
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