面与面的几何关系

GeometryUtil提供了面和面几何关系的计算方法,包括包含关系、相交关系以及重叠面的计算等,ringRingClip仅适用于凸多边形。

源代码编辑器

 <!doctype html>
<html>
<head>
 <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
 <title>面与面的关系</title>
 <link rel="stylesheet" href="https://a.amap.com/jsapi_demos/static/demo-center/css/demo-center.css" type="text/css">
 <script type="text/javascript" src="https://webapi.amap.com/maps?v=2.0&key=您申请的key值"></script>
 <script type="text/javascript" src="https://cache.amap.com/lbs/static/addToolbar.js"></script>
 <style>
 html,body,#container{
 height: 100%
 }
 </style>
</head>
<body>
<div id="container"></div>
<div class='info'>拖动小多边形可调整位置</div>
<script type="text/javascript">
 //初始化地图对象,加载地图
 var map = new AMap.Map("container", {
 resizeEnable: true,
 zoom: 13
 });
 var path1 = [
 [116.376907,39.910967],
 [116.384911,39.919505],
 [116.40109,39.919728],
 [116.411132,39.911408],
 [116.412076,39.899135],
 [116.402292,39.892353],
 [116.3874,39.892518],
 [116.376971,39.899267]
 ]
 var polygon1 = new AMap.Polygon({
 map:map,
 fillColor:'blue',
 fillOpacity:0.3,
 path:path1,
 })
 var path2 = [
 [116.390233,39.906602],
 [116.395254,39.908668],
 [116.400661,39.906667],
 [116.400962,39.898589],
 [116.395769,39.894855],
 [116.390147,39.898049],
 ]
 var polygon2 = new AMap.Polygon({
 map:map,
 fillColor:'red',
 fillOpacity:0.3,
 path:path2,
 draggable: true
 })
 
 var textBox = new AMap.Text({
 map: map,
 position: new AMap.LngLat(116.40109,39.919728),
 offset: new AMap.Pixel(-20, -40),
 style:{
 'background-color':'yellow',
 'border':'solid 1px #0088ff',
 'padding':'10px 20px'
 }
 })
 
 function compute(){
 var polygon1_path = polygon1.getPath();
 var polygon2_path = polygon2.getPath();
 // 小圈是否在大圈内
 var isRingInRing = AMap.GeometryUtil.isRingInRing(polygon2_path,polygon1_path);
 // 两圈是否交叉
 var doesRingRingIntersect = AMap.GeometryUtil.doesRingRingIntersect(polygon2_path,polygon1_path);
 var ringRingClip = AMap.GeometryUtil.ringRingClip(polygon2_path,polygon1_path);
 var ringArea = parseInt(AMap.GeometryUtil.ringArea(ringRingClip))
 
 var text = '两圈关系:在大圈外';
 if(isRingInRing){
 text = '两圈关系:在大圈内';
 }else if(doesRingRingIntersect){
 text = '两圈关系:两圈相交, 交叉区域面积为'+ringArea+'平方米';
 }
 textBox.setText(text)
 }
 compute();
 polygon2.on('dragend',compute)
 map.setFitView();
</script>
</body>
</html>
 
 

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