C#中GraphicsPath的Warp方法用法实例

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Drawing.Drawing2D;namespace advanced_drawing{  public partial class Form13 : Form  {    public Form13()    {      InitializeComponent();    }    private void Form13_Paint(object sender, PaintEventArgs e)    {      // Create a path and add a rectangle.      GraphicsPath myPath = new GraphicsPath();      RectangleF srcRect = new RectangleF(0, 0, 100, 200);      myPath.AddRectangle(srcRect);      // Draw the source path (rectangle)to the screen.      e.Graphics.DrawPath(Pens.Black, myPath);      // Create a destination for the warped rectangle.      PointF point1 = new PointF(200, 200);      PointF point2 = new PointF(400, 250);      PointF point3 = new PointF(220, 400);      PointF[] destPoints = { point1, point2, point3 };      // Create a translation matrix.      Matrix translateMatrix = new Matrix();      translateMatrix.Translate(100, 0);      // Warp the source path (rectangle).      myPath.Warp(destPoints, srcRect, translateMatrix,        WarpMode.Perspective, 0.5f);      // Draw the warped path (rectangle) to the screen.      e.Graphics.DrawPath(new Pen(Color.Red), myPath);    }  }}