Javascript 在Bing地图上绘制多边形位置

下面是我用来在Bing地图上绘制多边形的所有代码。我的问题是鼠标移动，我试图删除多边形中的最后一点，并将其替换为鼠标当前所在的位置。当点击发生时，会添加一个附加点以最终确定所述点，点击时只应添加1个点，并且在鼠标移动时应为中性点，因为它会弹出一次并按下一次。我的问题是，出于某种原因，当我调用Polygon.setLocationspoints时，它会在多边形内部附加一个点。在调用setLocations之前，我已经通过调试验证了我比调用setLocations之后少了1分。控制台输出显示在验证这一点的代码下面。看起来像是库中的一个bug，如果有人能帮我解决这个问题，我们将不胜感激。似乎只有当点数组的长度大于1时才会发生这种情况，因为当我只有1个点时，它不会导致这种奇怪的行为

编辑：好吧，我想出来了，它在结尾复制了第一个元素，而不是像人们期望的那样在内部引用它自己，你必须修改从第二个到最后一个的索引，否则它就会有这种行为

    Microsoft.Maps.Events.addHandler(map, 'mousemove', PolygonDrawMouseMove);

    Microsoft.Maps.Events.addHandler(map, 'click', function (e) {
        HideInfobox();
        HideContextInfobox();
        ClearPinSelection();
        PolygonDrawClick(e);
    });

    Microsoft.Maps.Events.addHandler(map, 'rightclick', function () {
        HideInfobox();
        HideContextInfobox();
        ClearPinSelection();
    });

var Polygon = null;
var isDrawingMode = false;


function PolygonDrawClick(event) {

    if (isDrawingMode && Polygon !== null && Polygon instanceof Microsoft.Maps.Polygon)
    {
        var locations = Polygon.getLocations();
        var location = propertyMap.tryPixelToLocation(new Microsoft.Maps.Point(event.getX(), event.getY()));
        locations.push(location);
        Polygon.setLocations(locations);
    }
}

function PolygonDrawMouseMove(event)
{
    if (isDrawingMode && Polygon !== null && Polygon instanceof Microsoft.Maps.Polygon)
    {
        var points = Polygon.getLocations();

        if (points.length > 1)
        {
            console.log('start');
            console.log(points.length);
        }

        if (points.length > 0)
        {
            points.pop();
        }

        if (points.length > 1)
            console.log(points.length);

        var location = propertyMap.tryPixelToLocation(new Microsoft.Maps.Point(event.getX(), event.getY()));
        points.push(location);

        if (points.length > 1)
            console.log(points.length);

        Polygon.setLocations(points);

        if(points.length > 1)
        {
            console.log(Polygon.getLocations().length);
        }
    }
}

function DeletePolygons() {
    if (!propertyMap)
        return;

    for (var i = propertyMap.entities.getLength() - 1; i >= 0; i--) {
        var polygon = propertyMap.entities.get(i);
        if (polygon instanceof Microsoft.Maps.Polygon)
            propertyMap.entities.removeAt(i);
    }

    Polygon = null;
}

$("#compsMap").keyup(function (event) {

    //escape
    if (event.keyCode === 27 && isDrawingMode && Polygon !== null && Polygon instanceof Microsoft.Maps.Polygon)
    {
        isDrawingMode = false;
        var locations = Polygon.getLocations();
        if (locations.length > 0) locations.pop();

        if (locations.length === 0)
            DeletePolygons();
        else
            Polygon.setLocations(locations);
    }
    else if (event.keyCode === 32 && !isDrawingMode) //space
    {
        DeletePolygons();
        isDrawingMode = true;
        Polygon = new Microsoft.Maps.Polygon([new Microsoft.Maps.Location(0,0)], { fillColor: 'rgba(255,212,42,0.6)', strokeColor: '#000000', strokeThickness: 2 });
        propertyMap.entities.push(Polygon);
    }
});

[![screen shot of console output][1]][1]

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这是故意的。多边形在V8中自动闭合其环，以帮助使其有效。简单地引用自己是不正常的，它也不起作用