c# - 填充笛卡尔图中两条曲线之间的空间

Question

在我的 WinForms 程序中，我在感受 carthesian 图中两条曲线之间的空间时遇到了一些困难。

基本上我有两条曲线，我使用这种方法在位图上绘制它们：

    public Bitmap DrawEnvelope(PointF[] u, PointF[] d)
    {
        g = Graphics.FromImage(box);
        g.SmoothingMode = SmoothingMode.AntiAlias;
        g.PixelOffsetMode = PixelOffsetMode.HighQuality;

        Pen pengraph = new Pen(Color.FromArgb(50, 0 ,0 ,200), 1F);
        pengraph.Alignment = PenAlignment.Center;

        g.DrawCurve(pengraph, u, 0); //uperline
        g.DrawCurve(pengraph, d, 0); //downline

        g.Dispose();

        return box;
    }

现在我想用颜色填充这两条曲线之间的空间。如何才能做到这一点？

我查看了 MSDN 并找到了类似 FillClosedCurve 的方法。但在这种情况下它对我没有帮助。

谢谢。

由 Akh 的评论解决

        joinedCurves.AddRange(u);
        joinedCurves.AddRange(d.Reverse());

        PointF[] fillPoints = joinedCurves.ToArray();
        SolidBrush fillBrush = new SolidBrush(Color.FromArgb(50, 0, 0, 200));
        FillMode newFillMode = FillMode.Alternate;

        g.FillClosedCurve(fillBrush, fillPoints, newFillMode, 0);

Answer 1

List<PointF> joinedCurves = new List<PointF>();
joinedCurves.AddRange(u);        
jointCurves.AddRange(d.Reverse());      
PointF[] fillPoints = joinedCurves.ToArray();    
SolidBrush fillBrush = new SolidBrush(Color.FromArgb(50, 0, 0, 200));    
FillMode newFillMode = FillMode.Alternate;    
g.FillClosedCurve(fillBrush, fillPoints, newFillMode, 0);