c#中GraphicsPath的Warp方法

 

1. using System;
2. using System.Collections.Generic;
3. using System.ComponentModel;
4. using System.Data;
5. using System.Drawing;
6. using System.Text;
7. using System.Windows.Forms;
8. using System.Drawing.Drawing2D;
9. namespace advanced_drawing
10. {
11.     public partial class Form13 : Form
12.     {
13.         public Form13()
14.         {
15.             InitializeComponent();
16.         }
18.         private void Form13_Paint(object sender, PaintEventArgs e)
19.         {
20.             // Create a path and add a rectangle.
21.             GraphicsPath myPath = new GraphicsPath();
22.             RectangleF srcRect = new RectangleF(0, 0, 100, 200);
23.             myPath.AddRectangle(srcRect);
25.             // Draw the source path (rectangle)to the screen.
26.             e.Graphics.DrawPath(Pens.Black, myPath);
28.             // Create a destination for the warped rectangle.
29.             PointF point1 = new PointF(200, 200);
30.             PointF point2 = new PointF(400, 250);
31.             PointF point3 = new PointF(220, 400);
32.             PointF[] destPoints = { point1, point2, point3 };
34.             // Create a translation matrix.
35.             Matrix translateMatrix = new Matrix();
36.             translateMatrix.Translate(100, 0);
38.             // Warp the source path (rectangle).
39.             myPath.Warp(destPoints, srcRect, translateMatrix,
40.                 WarpMode.Perspective, 0.5f);
42.             // Draw the warped path (rectangle) to the screen.
43.             e.Graphics.DrawPath(new Pen(Color.Red), myPath);
45.         }
46.     }
47. }