[C#] 繪製-多邊形

公司內有使用到 FillPolygon 來繪製圖型，拿官方範例 - Graphics.FillPolygon 方法 來了解

C# Code

using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

namespace GraphicsSample
{
    public partial class FrmFillPolygon : Form
    {
        public FrmFillPolygon()
        {
            InitializeComponent();
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);
            FillPolygonWinding(e);
        }

        public void FillPolygonWinding(PaintEventArgs e)
        {
            PointF point1 = new PointF(50.0F, 50.0F);
            PointF point2 = new PointF(100.0F, 25.0F);
            PointF point3 = new PointF(200.0F, 5.0F);
            PointF point4 = new PointF(250.0F, 50.0F); 
            PointF point5 = new PointF(300.0F, 100.0F);
            PointF point6 = new PointF(350.0F, 200.0F);
            PointF point7 = new PointF(250.0F, 250.0F);
            PointF[] curvePoints = { point1, point2, point3, point4, point5, point6, point7 };

            FillMode fillMode = FillMode.Winding;

            e.Graphics.FillPolygon(Brushes.LightBlue, curvePoints, fillMode);
        }
    }
}

範例筆記

• [250,50] 和 [300,100] 個人感覺剛好形成一條直線，導致 [250,50] 沒有很明顯
• 該範例設定 FillMode 其實看不出效果

• 參考資料
• FillMode 列舉