Go homepage(回首页) Upload pictures (上传图片) Write articles (发文字帖)
The author:(作者)qqpublished in(发表于) 2014/7/11 9:29:29 java中全局变换和局部变换
java中全局变换和局部变换
全局变换和局部变换1.全局变换全局变换是应用于由给定Graphics对象绘制的每个项目的变换。创建全局变换时,可以通过操作Graphics对象的Transform属性来实现,Transform属性是Matrix类的对象。示例图像的全局变换本示例实现的是,当程序运行时,单击【全局变换】按钮,在窗体中的相同位置绘制一个椭圆和一个经过全局变换处理的椭圆。示例运行结果如图1所示。图1 图像的全局变换Form1窗体中,在【全局变换】按钮的Click事件中,首先通过调用Graphics对象的DrawEllipse方法绘制一个普通椭圆,然后使用Graphics对象创建一个全局变换(该变换首先在y轴方向上缩放0.5倍,再在x轴方向平移50个单位,然后旋转30°),最后再次调用Graphics对象的DrawEllipse方法绘制椭圆。【全局变换】按钮的Click事件代码如下:private void button1_Click(object sender, EventArgs e){Graphics graphics = this.CreateGraphics();Pen myPen = new Pen(Color.Blue, 2);graphics.DrawEllipse(myPen, 10, 30, 100, 50);graphics.ScaleTransform(1, 0.5f);graphics.TranslateTransform(50, 0, MatrixOrder.Append);graphics.RotateTransform(30, MatrixOrder.Append);graphics.DrawEllipse(myPen, 10, 30, 100, 50);}完整程序代码:★ ★★★★Form1.cs窗体代码文件完整程序代码★★★★★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 _6_20{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){Graphics graphics = this.CreateGraphics();Pen myPen = new Pen(Color.Blue, 2);graphics.DrawEllipse(myPen, 10, 30, 100, 50);graphics.ScaleTransform(1, 0.5f);graphics.TranslateTransform(50, 0, MatrixOrder.Append);graphics.RotateTransform(30, MatrixOrder.Append);graphics.DrawEllipse(myPen, 10, 30, 100, 50);}}}★ ★★★★Form1.Designer.cs窗体设计文件完整程序代码★★★★★namespace _6_20{partial class Form1{/// /// 必需的设计器变量。/// private System.ComponentModel.IContainer components = null;/// /// 清理所有正在使用的资源。/// /// 如果应释放托管资源,为 true;否则为 false。protected override void Dispose(bool disposing){if (disposing && (components != null)){components.Dispose();}base.Dispose(disposing);}#region Windows 窗体设计器生成的代码/// /// 设计器支持所需的方法 - 不要/// 使用代码编辑器修改此方法的内容。/// private void InitializeComponent(){this.button1 = new System.Windows.Forms.Button();this.SuspendLayout();//// button1//this.button1.Location = new System.Drawing.Point(155, 21);this.button1.Name = "button1";this.button1.Size = new System.Drawing.Size(26, 79);this.button1.TabIndex = 0;this.button1.Text = "全局变换";this.button1.UseVisualStyleBackColor = true;this.button1.Click += new System.EventHandler(this.button1_Click);//// Form1//this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;this.ClientSize = new System.Drawing.Size(194, 119);this.Controls.Add(this.button1);this.MaximizeBox = false;this.Name = "Form1";this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;this.Text = "Form1";this.ResumeLayout(false);}#endregionprivate System.Windows.Forms.Button button1;}}★ ★★★★Program.cs主程序文件完整程序代码★★★★★using System;using System.Collections.Generic;using System.Windows.Forms;namespace _6_20{static class Program{/// /// 应用程序的主入口点。///
赞