不规则棱柱体

使用Prism类型创建和展示朝阳区的棱柱体，并给地图设置光照，实现三维地块的展示。

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          <!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>朝阳区 Prism</title>
    <style>
        html,
        body,
        #container {
            margin: 0;
            padding: 0;
            width: 100%;
            height: 100%;
        }
    </style>
</head>
<body>
<div id="container"></div>
<script src="//webapi.amap.com/maps?v=1.4.15&key=您申请的key值&plugin=Map3D,AMap.DistrictSearch"></script>
<script>
    var map = new AMap.Map('container', {
        viewMode: '3D',
        pitch: 50,
        zoom: 11,
        center: [116.480766, 39.932931]
    });

    // 设置光照
    map.AmbientLight = new AMap.Lights.AmbientLight([1, 1, 1], 0.5);
    map.DirectionLight = new AMap.Lights.DirectionLight([0, 0, 1], [1, 1, 1], 1);

    var object3Dlayer = new AMap.Object3DLayer();
    map.add(object3Dlayer);

    new AMap.DistrictSearch({
        subdistrict: 0,   //返回下一级行政区
        extensions: 'all',  //返回行政区边界坐标组等具体信息
        level: 'city'  //查询行政级别为 市
    }).search('朝阳区', function (status, result) {
        var bounds = result.districtList[0].boundaries;
        var height = 5000;
        var color = '#0088ffcc'; // rgba
        var prism = new AMap.Object3D.Prism({
            path: bounds,
            height: height,
            color: color
        });

        prism.transparent = true;
        object3Dlayer.add(prism);

        var text = new AMap.Text({
            text: result.districtList[0].name + '</br>(' + result.districtList[0].adcode + ')',
            verticalAlign: 'bottom',
            position: [116.528261, 39.934313],
            height: 5000,
            style: {
                'background-color': 'transparent',
                '-webkit-text-stroke': 'red',
                '-webkit-text-stroke-width': '0.5px',
                'text-align': 'center',
                'border': 'none',
                'color': 'white',
                'font-size': '24px',
                'font-weight': 600
            }
        });

        text.setMap(map);
    });

</script>
</body>
</html>
        

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