本文介绍了如何从谷歌地图API中的多边形区域除外的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有两个多边形（P1和P2）的坐标在Google地图上创建。当P2位于P1时如何从P1切断P2？
例如
这是我的js：
我有两个多边形（P1和P2）的坐标在Google地图上创建。当P2位于P1时如何从P1切断P2？
例如
这是我的js：
I have coordinates of two polygons (P1 and P2) to create it on google maps. How cut P2 from P1 when P2 is located in P1?For example http://quality.iro38.ru/CI/question_about_map.php
This is my js:
var triangleCoords = [
new google.maps.LatLng(25.774252, -80.190262),
new google.maps.LatLng(18.466465, -66.118292),
new google.maps.LatLng(32.321384, -64.75737),
new google.maps.LatLng(25.774252, -80.190262)
];
var triangleCoords1 = [
new google.maps.LatLng(29,-69),
new google.maps.LatLng(23,-72),
new google.maps.LatLng(25,-70),
new google.maps.LatLng(29,-69)
];
bermudaTriangle = new google.maps.Polygon({
paths: [triangleCoords, triangleCoords1],
strokeColor: '#FF0000',
strokeOpacity: 0.8,
strokeWeight: 2,
fillColor: '#FF0000',
fillOpacity: 0.35
});
bermudaTriangle.setMap(map);
You need to make the winding direction of the inner polygon opposite the winding direction of the outer polygon.
code snippet:
var map;
function initialize() {
map = new google.maps.Map(
document.getElementById("map_canvas"), {
center: new google.maps.LatLng(37.4419, -122.1419),
zoom: 13,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var bounds = new google.maps.LatLngBounds();
var triangleCoords = [
new google.maps.LatLng(25.774252, -80.190262),
new google.maps.LatLng(18.466465, -66.118292),
new google.maps.LatLng(32.321384, -64.75737),
new google.maps.LatLng(25.774252, -80.190262)
];
var triangleCoords1 = [
new google.maps.LatLng(29, -69),
new google.maps.LatLng(25, -70),
new google.maps.LatLng(23, -72),
new google.maps.LatLng(29, -69)
];
for (var i = 0; i < triangleCoords.length; i++) {
bounds.extend(triangleCoords[i]);
}
for (var i = 0; i < triangleCoords1.length; i++) {
bounds.extend(triangleCoords1[i]);
}
map.fitBounds(bounds);
bermudaTriangle = new google.maps.Polygon({
paths: [triangleCoords, triangleCoords1],
strokeColor: '#FF0000',
strokeOpacity: 0.8,
strokeWeight: 2,
fillColor: '#FF0000',
fillOpacity: 0.35
});
bermudaTriangle.setMap(map);
}
google.maps.event.addDomListener(window, "load", initialize);html,
body,
#map_canvas {
height: 100%;
width: 100%;
margin: 0px;
padding: 0px
}<script src="https://maps.googleapis.com/maps/api/js"></script> <div id="map_canvas" style="border: 2px solid #3872ac;"></div>
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