坐标系的变化与图形变换.doc

坐标系的变化与图形变换private void Form1_Paint(object sender, PaintEventArgs e) Graphics g = e.Graphics; g.FillRectangle(Brushes.White, this.ClientRectangle); g.DrawRectangle(Pens.Black, 10, 10, 50, 50); g.DrawEllipse(Pens.Black,10,10,10,10); g.ScaleTransform(2.0f, 3.0f); g.DrawRectangle(Pens.Black, 10, 10, 50, 50); g.DrawEllipse(Pens.Black, 10, 10, 10, 10); g.ScaleTransform(0.5f, 0.3333333f); g.DrawRectangle(Pens.Red, 20, 30, 100, 150); g.DrawEllipse(Pens.Red, 20, 30, 20, 30); private void button1_Click(object sender, EventArgs e) Graphics g = this.CreateGraphics(); g.FillRectangle(Brushes.White, this.ClientRectangle); Font f = new Font(Times New Roman, 24); g.DrawString(Traslation,f,Brushes.Black,0,0); g.TranslateTransform(150, 75); g.DrawString(Traslation, f, Brushes.Black, 0, 0); private void button2_Click(object sender, EventArgs e) Graphics g = this.CreateGraphics(); g.FillRectangle(Brushes.White, this.ClientRectangle); for (int i = 1; i = 5; +i) g.DrawRectangle(Pens.Black, 10, 10, 30, 50); g.TranslateTransform(2, 10); private void button3_Click(object sender, EventArgs e) Graphics g = this.CreateGraphics(); g.FillRectangle(Brushes.White, this.ClientRectangle); g.DrawEllipse(Pens.Black, 20, 20, 30, 50); g.TranslateTransform(-15, 0); g.DrawEllipse(Pens.Black, 20, 20, 30, 50); g.ResetTransform(); g.TranslateTransform(0, 30); g.DrawEllipse(Pens.Black, 20, 20, 30, 50); private void button4_Click(object sender, EventArgs e) Graphics g = this.CreateGraphics(); g.FillRectangle(Brushes.White, this.ClientRectangle); Font f = new Font(Times New Roman, 24); g.DrawString(Rotation, f, Brushes.Black, 0, 0); g.RotateTransform(45); g.TranslateTransform(100, 10); g.DrawString(Rotation, f, Brushes.Black, 0, 0); private void button5_Click(object sender, EventArgs e) Graphics g = this.CreateGraphics(); g.FillRectangle(Brushes.White, this.ClientRectangle); Font f = new Font(Times New Roman, 16); for (float angle = 0; angle 360; angle += 45) g.ResetTransform(); g.TranslateTransform(ClientRectangle.Width / 2, ClientRectangle.Height / 2); g.RotateTransform(angle); g.DrawString(Hello World, f, Brushes.Red, 50, 0); private void button6_Click(object sender, EventArgs e) Graphics g = this.CreateGraphics(); g.FillRectangle(Brushes.White, this.ClientRectangle); Font f = new Font(Times New Roman, 24); g.TranslateTransform(175, 50); g.DrawString(BOBUI.DH, f, Brushes.Black, 0, 0); g.ScaleTransform(-1, 1); g.DrawString(BOBUI.DH, f, Brushes.Black, 0, 0); private void button7_Click(object sender, EventArgs e) Graphics g = this.CreateGraphics(); g.FillRectangle(Brushes.White, this.ClientRectangle); Matrix m = new Matrix(); m.Shear(0.6f, 0); g.DrawRectangle(Pens.Black, 10, 10, 50, 50); g.MultiplyTransform(m); g.DrawRectangle(Pens.Black, 70, 10, 50, 50); Form1_Paint：这里里面实现了一个图形的放缩ScaleTransform：将指定的缩放操作应用于此 Graphics 的变换矩阵，方法是将该对象的变换矩阵左乘该缩放矩阵button1_Click：坐标系平移实现图像位置的变化TranslateTransform：通过使此 Graphics 的变换矩阵左乘指定的平移来更改坐标系统的原点。button2_Click：坐标原点的变换，这个例子说明TranslateTransform变换坐标是连续的button3_Click：还原系统原点ResetTransform：将此 Graphics 的世界变换矩阵重置为单位矩阵button4_Click：图像的旋转RotateTransform：指定旋转应用于此 Graphics 的变换矩阵button5_Click：坐标系变换与旋转综合示例button6_Click：图形