C#填充多边形(三角形)

Question

我在绘制两个多边形时遇到问题。我想填充两个三角形，但一个大于第二个。我在 winforms 中使用 UserControl。代码:

Point[] DOWN = new Point[] {new Point(0, 0), new Point(10, 0), new Point(5, 5)};
Point[] UP = new Point[] { new Point(0, 15), new Point(10, 15), new Point(5, 10) };

protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);
            SolidBrush brush = new SolidBrush(Color.FromArgb(253, 198, 19));       
            e.Graphics.FillPolygon(brush, DOWN);
            e.Graphics.FillPolygon(brush, UP);
            brush.Dispose();
        }

问题出在哪里？

Answer 1

尝试设置 PixelOffsetMode 属性:

e.Graphics.PixelOffsetMode = PixelOffsetMode.Half;
using (SolidBrush brush = new SolidBrush(Color.FromArgb(253, 198, 19))) {
  e.Graphics.FillPolygon(brush, DOWN);
  e.Graphics.FillPolygon(brush, UP);
}

结果: