在wpf中绘制来回路径时出现奇怪的问题 [英] weird issue when drawing a forth and back path in wpf

问题描述

我在c#代码中使用Path绘制了一系列点.我只是以xaml为例.

I was drawing a series of points with Path in c# code. I just give an example in xaml.

因此折线从(20,37)到(20,36)，然后返回(20,37).应该很短吧?但这变成了大约9dp长的一段.

So the polyline is from (20,37) to (20,36) and returns to (20,37). It is supposed to be very short, right? But it turns to be a segment roughly 9dp long.

如果我简单地从(20,37)画到(20,36)，它的行为正常.因为这些点是实时绘制的，所以我无法进行预处理.

if I simply draw from (20,37) to (20,36), it behaves normal. Because the points are drawn in real-time that I cannot do preprocessing.

为什么?如何解决?

<Path Stroke="Black" StrokeThickness="2">
    <Path.Data>
        <PathGeometry>
            <PathFigure StartPoint="20,37">
                <PathFigure.Segments>
                    <LineSegment Point="20,36"/>
                    <LineSegment Point="20,37"/>
                </PathFigure.Segments>
            </PathFigure>
        </PathGeometry>
    </Path.Data>
</Path>

推荐答案

更改

change StrokeMiterLimit of Path (default is 10)

<Path Stroke="Black" StrokeThickness="2" StrokeMiterLimit="1">

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