我的任务是创建两个可拖动的标记,并在它们之间形成网格,类似于http://prntscr.com/4nx9f3中的那样。
当我改变其中一个标记时,应该改变网格。我尝试用折线来绘制。顺便说一下,我无法使用
以下为我的全部代码:
![enter image description here](https://istack.dev59.com/9bFSD.webp)
marker1.getPosition().lat()
获取纬度或经度。以下为我的全部代码:
<!DOCTYPE html>
<html>
<head>
<title>Simple Map</title>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<style>
html, body, #map-canvas {
height: 100%;
margin: 0px;
padding: 0px
}
</style>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp"></script>
<script>
var map;
var marker1;
var marker2;
function initialize() {
var mapOptions = {
zoom: 10,
center: new google.maps.LatLng(50.3, 44.3)
};
map = new google.maps.Map(document.getElementById('map-canvas'),
mapOptions);
marker1 = new google.maps.Marker({
position: new google.maps.LatLng(50.1, 44.1),
map: map,
draggable: true,
title: 'marker1 '
});
marker2 = new google.maps.Marker({
position: new google.maps.LatLng(50.5, 44.5),
map: map,
draggable: true,
title: 'marker2'
});
var flightPlanCoordinates = [
marker1.getPosition(),
marker2.getPosition(),
];
// code below is not working
/*
google.maps.event.addListener(marker1, 'dragend', function () {
polyline.LatLngBounds(new google.maps.LatLng(marker1.getPosition(), marker2.getPosition()));
});
google.maps.event.addListener(marker2, 'dragend', function () {
polyline.LatLngBounds(new google.maps.LatLng(marker1.getPosition(), marker2.getPosition()));
*/
var polyline = new google.maps.Polyline(
{ path: flightPlanCoordinates,
geodesic: true,
strokeColor: '#FF0000',
strokeOpacity: 1.0,
strokeWeight: 2
});
var lat1 = marker1.getPosition().lat();
var lng1 = marker1.getPosition().lng();
var lat2 = marker2.getPosition().lat();
var lng2 = marker2.getPosition().lng();
// I tried to get distance between 2 markers but it did not work either
/* function distance(
lat1,
lng1,
lat2,
lng2
) {
var R = 6371;
var a =
0.5 - Math.cos((lat2 - lat1) * Math.PI / 180) / 2 +
Math.cos(lat1 * Math.PI / 180) * Math.cos(lat2 * Math.PI / 180) *
(1 - Math.cos((lon2 - lon1) * Math.PI / 180)) / 2;
return R * 2 * Math.asin(Math.sqrt(a));
}
*/
polyline.setMap(map);
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
<body>
<div id="map-canvas"></div>
</body>
</html>