为什么我会看到这个锯齿状的曲线? [英] Why do I see this jagged curves?

问题描述

我有一个画布并使用此代码绘制曲线:

I have a canvas and draw curve with this code:

using (Graphics g = Graphics.FromImage(canvas.BackgroundImage))
{
    g.DrawCurve(pen, points);

points 是我用鼠标位置点填充的数组.在结果中，我看到了一些我没有绘制的锯齿状线条.

points is array that I fill that by mouse location points. In the result I see some jagged lines that I didn't draw.

你可以在这里看到它们(在红色矩形中):

You can see them here(in red rectangles):

我该怎么办?

推荐答案

您所看到的是 Linejoin，即斜接和MiterLimit，即 10.

What you is see is the somewhat unlucky combination of the default for Linejoin, which is Miter and the default for MiterLimit, which is 10.

相反，您可以选择选择其他 LineJoin 选项之一或将 MiterLimit 减少到小于 Pen.Width 的一半>..

Instead you have a choice of either picking one of the other LineJoin options or reducing the MiterLimit to say less than half the Pen.Width..

using (Pen myPen = new Pen(Color.Blue, 24f))
{
    // either another LineJoine;
    myPen.LineJoin = System.Drawing.Drawing2D.LineJoin.Round;
    // or a reduced MiterLimit:
    myPen.MiterLimit = 1+ myPen.Width / 5f;
}

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