SuperMap绘制扇形

function getPoints(center, radius, startAngle, endAngle, pointNum) {
    var sin;
    var cos;
    var x;
    var y;
    var angle;
    var points = new Array();
    points.push(center);
    for (var i = 0; i <= pointNum; i++) {
        angle = startAngle + (endAngle - startAngle) * i / pointNum;
        sin = Math.sin(angle *
            Math.PI / 180);
        cos = Math.cos(angle * Math.PI / 180);
        y = center[0] + radius * cos;
        x = center[1] + radius * sin;
        points[i] = [y, x];
        debugger
    }
    var point = points;
    point.push(center);
    return point;
}
//2.调用leaflet中饿多边形生成扇形 var
var clon = 115.5;
var clat = 38.5;
var points = getPoints([clat, clon], 2, 45, 0, 50);
points[points.length] = points[0];
var arcS = L.polygon(points).addTo(map).bindPopup("一个扇形");