Csharp/C Sharp by API/System.Drawing.Drawing2D/Matrix

Matrix.Rotate

<source lang="csharp"> using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; using System.Drawing.Drawing2D; public class Form1 : System.Windows.Forms.Form {

   [STAThread]
   static void Main() {
       Application.Run(new Form1());
   }
   protected override void OnPaint(PaintEventArgs e) {
       Graphics g = CreateGraphics();
       string txt = "HELLO";
       float alpha = 45.0f;
       int fontSize = 24;
       Point center = new Point(90, 20);
       FontFamily ff = new FontFamily("Times New Roman");
       Font f = new Font(ff, fontSize, FontStyle.Regular);
       StringFormat sf = new StringFormat();
       sf.FormatFlags = StringFormatFlags.DirectionVertical;
       g.DrawString(txt, f, new SolidBrush(Color.Blue), center, sf);
       g.TranslateTransform(center.X, center.Y);
       g.DrawEllipse(Pens.Magenta, new Rectangle(0, 0, 1, 1));
       GraphicsPath gp = new GraphicsPath();
       gp.AddString(txt, ff, (int)FontStyle.Bold, fontSize + 4, new Point(0, 0), sf);
       Matrix m = new Matrix();
       m.Rotate(alpha);
       gp.Transform(m);
       g.DrawPath(Pens.Red, gp);
       g.RotateTransform(-alpha);
       g.DrawString(txt, f, new SolidBrush(Color.Black), 0, 0, sf);
       gp.Dispose(); g.Dispose(); m.Dispose();
   }

}

 </source>

Matrix.TransformPoints

<source lang="csharp">

using System; using System.Drawing; using System.Drawing.Drawing2D;

   public class Matrix1
   {
       [STAThread]
       static void Main(string[] args)
       {
         Matrix m = new Matrix();
         m.Rotate(90, MatrixOrder.Append);
         m.Translate(7, 12, MatrixOrder.Append);
         Point[] p = {new Point(20, 45)};
         Console.WriteLine(p.GetValue(0).ToString());
         m.TransformPoints(p);
         Console.WriteLine(p.GetValue(0).ToString());
   
         Console.ReadLine();
       }
   }
  
   
 </source>

Matrix.Translate

<source lang="csharp">

using System; using System.Drawing; using System.Drawing.Drawing2D;

   public class Matrix1
   {
       [STAThread]
       static void Main(string[] args)
       {
         Matrix m = new Matrix();
         m.Rotate(90, MatrixOrder.Append);
         m.Translate(7, 12, MatrixOrder.Append);
         Point[] p = {new Point(20, 45)};
         Console.WriteLine(p.GetValue(0).ToString());
         m.TransformPoints(p);
         Console.WriteLine(p.GetValue(0).ToString());
   
         Console.ReadLine();
       }
   }
  
   
 </source>

new Matrix

<source lang="csharp">

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

class MobyDick: Form {

    public static void Main()
    {
         Application.Run(new MobyDick());
    }
    public MobyDick()
    {
         ResizeRedraw = true; 
    }
    protected override void OnPaint(PaintEventArgs pea)
    {
         DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
    }     
    protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
    {
         grfx.Transform = new Matrix(0.707f, 0.707f, -0.707f, 0.707f, 0, 0);
         grfx.DrawString("abc", Font, new SolidBrush(clr), 
                         new Rectangle(0, 0, cx, cy));
    }

}

 </source>