从画布中获取多边形的点

Question

在 C# 中为 Pixelsense 实现 WPF 应用程序。

我很难找到在屏幕上放置多边形以检测多边形重叠的特定点（这是下一阶段）。总的来说，我的应用程序中可以有 7 个多边形，下面是我尝试获取它们的点的代码。

我认为代码理想的做法是启动一个循环，创建一个多边形（形状 1），然后启动第二个循环，创建另一个多边形（形状 2）并获取两个形状点并检查重叠。然后第二个循环将继续检查另一个形状（形状 3）是否与形状 1 重叠，方法是获取其点等等......所以第一个多边形将与其他 6 个多边形检查重叠，因此是嵌套循环。

但是，当前发生的情况是该方法为第一个多边形选取的任何点，它们也会被复制到第二个多边形。因此，它为两个单独的多边形打印出一组重复点并永远循环。

我已经被困了一段时间了，请帮助我:)

public void DefiningPolygonArea()
    {
        foreach (var polygonsCollection1 in this.PlayingCanvas.Children)
        {
            Polygon polygon1 = polygonsCollection1 as Polygon;
            if (polygon1 != null)
            {
                foreach (var polygonsCollection2 in this.PlayingCanvas.Children)
                {
                    Polygon polygon2 = polygonsCollection2 as Polygon;
                    if (polygon1 != polygon2 && polygon2 != null)
                    {
                        HelperMethods.PointCollectionsOverlap_Fast(getPoints(polygon1), getPoints(polygon2));
                    }
                }
            }
        }
    }

private List<Point> getPoints(Polygon poly)
    {
        if (poly.Points.Count == 4)
        {
            var transform = poly.TransformToVisual(this.PlayingCanvas);

            Point point1 = transform.Transform(poly.Points[0]);
            Point point2 = transform.Transform(poly.Points[1]);
            Point point3 = transform.Transform(poly.Points[2]);
            Point point4 = transform.Transform(poly.Points[3]);

            area1.Add(point1);
            area1.Add(point2);
            area1.Add(point3);
            area1.Add(point4);
            Console.WriteLine("polygon with 4 points consists of: " + area1[0] + " , " + area1[1] + " , " + area1[2] + " , " + area1[3]);

        }
        else if (poly.Points.Count == 3)
        {
            var transform = poly.TransformToVisual(this.PlayingCanvas);

            Point point1 = transform.Transform(poly.Points[0]);
            Point point2 = transform.Transform(poly.Points[1]);
            Point point3 = transform.Transform(poly.Points[2]);

            area1.Add(point1);
            area1.Add(point2);
            area1.Add(point3);
            Console.WriteLine("polygon with 3 points consists of: " + area1[0] + " , " + area1[1] + " , " + area1[2]);
        }

        return area1;
    }

输出：

多边形与4分组成：713.345368087522,713.83644226973，550.13652222242424242424.044482999935686，463.0633.067512500125007796,641257796,64125796,6441.64178882788882788888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888882转

三点多边形包括： 713.345368087522,713.83644226973 , 550.136522242161,724.044829935686 , 463.067512500796,641.78273862321

Answer 1

根据我的评论，您的循环需要像这样进行排除：

foreach (var polygon1 in this.PlayingCanvas.Children.OfType<Polygon>())
    foreach (var polygon2 in this.PlayingCanvas.Children.OfType<Polygon>().Where(x => x != polygon1))
            HelperMethods.PointCollectionsOverlap_Fast(getPoints(polygon1), getPoints(polygon2));

写于StackEdit。