c# - 使用 CombinedGeometry 在 wpf 中连接两个多边形

Question

我正在使用 CombinedGeometry 将几个矩形合并在一起。这是我使用的代码。

它有点冗长，但它的要点是这里将两个矩形组合成一个几何图形，并将最终的几何图形传递给 Path.Data。

现在，当我合并这些时，如下图所示，当两个矩形相互连接时，连接处相当难看。我想知道是否有办法让它看起来更漂亮一些，如红色标记所示？

<Canvas Width="1000" Height="1000">
    <Path Stroke="Black" StrokeThickness="1" Fill="Transparent" x:Name="MyPath" >
    </Path>
</Canvas>

public class MyRect
{
    public double X1 { get; set; }
    public double Y1 { get; set; }
    public double X2 { get; set; }
    public double Y2 { get; set; }
    public double X3 { get; set; }
    public double Y3 { get; set; }
    public double X4 { get; set; }
    public double Y4 { get; set; }
}

var cg = new CombinedGeometry { GeometryCombineMode = GeometryCombineMode.Union };

var rect1 = new MyRect { X1 = 500, Y1 = 120, X2 = 1000, Y2 = 120, X3 = 1000, Y3 = 80, X4 = 500, Y4 = 80 };
var rect2 = new MyRect { X1 = 480, Y1 = 100, X2 = 480, Y2 = 200, X3 = 520, Y3 = 200, X4 = 520, Y4 = 100 };

var list = new List<MyRect>
{
    rect1, rect2
};

var geometry = new PathGeometry();

var myRec = list[0];
var la = new LineSegment { Point = new Point(myRec.X2, myRec.Y2) };
var lb = new LineSegment { Point = new Point(myRec.X3, myRec.Y3) };
var lc = new LineSegment { Point = new Point(myRec.X4, myRec.Y4) };
var pathFigure = new PathFigure
{
    StartPoint = new Point(myRec.X1, myRec.Y1),
    Segments = { la, lb, lc }
};

var path = new PathGeometry { Figures = { pathFigure } };
cg.Geometry1 = path;
for (var i = 1; i < list.Count; i++)
{
    myRec = list[i];

    la = new LineSegment { Point = new Point(myRec.X2, myRec.Y2) };
    lb = new LineSegment { Point = new Point(myRec.X3, myRec.Y3) };
    lc = new LineSegment { Point = new Point(myRec.X4, myRec.Y4) };
    pathFigure = new PathFigure
    {
        StartPoint = new Point(myRec.X1, myRec.Y1),
        Segments = { la, lb, lc }
    };

    path = new PathGeometry { Figures = { pathFigure } };
    cg.Geometry2 = path;

    geometry = cg.GetFlattenedPathGeometry();
    cg.Geometry1 = geometry;
}
MyPath.Data = geometry;

Answer 1

走组合路径并合并边对，其中两条边都比某个 X 短？

X 可以设置为略低于任何矩形边的最小长度，因此您不会改变原始特征，只需清理图片中的小瑕疵。

取决于您的源数据以及您是否有任何不平凡的案例。