如何在WPF中绘制平滑的曲线？ [英] How to draw a smooth curved line in WPF?

问题描述

我有三个已知位置，目前我正在开这两行：

I have three known positions, and currently I am driving two lines like so:

Line line = new Line
{
    StrokeThickness = 3,
    Stroke = lineColor,
    X1 = MyX,
    Y1 = MyY,
    X2 = MyX,
    Y2 = MiddleY
};

Graph.Children.Add(line);

line = new Line
{
    StrokeThickness = 3,
    Stroke = lineColor,
    X1 = MyX,
    Y1 = MiddleY,
    X2 = TargetX,
    Y2 = TargetY
};

Graph.Children.Add(line);

结果如下：

所以，你可以看到，这几乎是我想要的，除了我想要更平滑，只是一点点。

So, as you can see, this is almost what I want except that I want it to be more smoothed out, just a little bit.

现在我正在寻找任何方式，我可以设置三个点，将一些平滑/弯曲的水平设置到中间点，然后在其上画一条具有纯色的线。很像我可以在Photoshop中做到这一点：

Now I'm looking for any way I could set three points, set some smooth/curvy level to the middle point and then draw a line with a solid color on it. Much like how I can do this in Photoshop:

或至少得到类似的平滑度。

Or at least get a similar kind of smoothness.

推荐答案

我想你正在寻找splines

I think you are looking for splines

http://msdn.microsoft.com/en-us/library/554h284b.aspx

Gabe是正确的即来自窗体

Gabe is correct that is from Forms

在WPF下，你可以尝试一个PolyBezierSegment，但它需要4点。

Under WPF you could try a PolyBezierSegment but it require 4 points. Possible you could put in three points and 1 more to shape it.

<Canvas>
    <Path Stroke="Black" StrokeThickness="10">
        <Path.Data>
            <PathGeometry>
                <PathGeometry.Figures>
                    <PathFigureCollection>    
                        <PathFigure StartPoint="100,80">
                            <PathFigure.Segments>
                                <PathSegmentCollection>
                                    <PolyBezierSegment Points="90,200 140,200 160,200 180,200 430,190 430,280" />
                                </PathSegmentCollection>
                            </PathFigure.Segments>
                        </PathFigure>
                    </PathFigureCollection>
                </PathGeometry.Figures>
            </PathGeometry>
        </Path.Data>
    </Path>
</Canvas>

这将产生以下曲线

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