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Thread: Rotate Graphics path

  1. #1

    Thread Starter
    Fanatic Member
    Join Date
    May 2004
    Location
    england
    Posts
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    Rotate Graphics path

    Hi,

    I dont know what I am doing wrong here but for some reason the graphics path does not rotate properly, I have created a user control that loads in a graphics path and will scale the path to the size of the user control which is fine, but when I go to rotate the path the rotation goes all wrong, could someone please look at my code? if you want my sample project I will send it.

    VB Code:
    1. protected override void OnResize(EventArgs eventargs)
    2.         {
    3.             base.OnResize(eventargs);
    4.             DrawPath();
    5.         }
    6.  
    7.         private void DrawPath()
    8.         {
    9.             Bitmap b = new Bitmap(this.Width, this.Height);
    10.             Graphics e = Graphics.FromImage(b);
    11.             if (Mainpath != null)
    12.             {
    13.                 try
    14.                 {
    15.                     float x = 0f;
    16.                     float y = 0f;
    17.                     x = (this.Width) / ((float)Mainpath.GetBounds().Width + 1);
    18.                     y = (this.Height) / ((float)Mainpath.GetBounds().Height + 1);
    19.                     Matrix m = new Matrix();
    20.                     m.Scale(x, y);
    21.                     Mainpath.Transform(m);
    22.  
    23.  
    24.                     e.DrawPath(new Pen(Color.Black), Mainpath);
    25.                     this.BackgroundImage = b;
    26.                 }
    27.                 catch { }
    28.             }
    29.         }
    30.  
    31.         private void Rotate(float Value)
    32.         {
    33.             try
    34.             {
    35.                 Matrix m = new Matrix();
    36.                 m.RotateAt(Value, new PointF(this.Width /2,this.Height / 2));
    37.                 Mainpath.Transform(m);
    38.                 DrawPath();
    39.             }
    40.             catch { };
    41.         }
    42.  
    43.         private float m_RotateAnglePath;
    44.  
    45.         public float RotateAnglePath
    46.         {
    47.             get { return m_RotateAnglePath; }
    48.             set
    49.             {
    50.                 m_RotateAnglePath = value;
    51.                 Rotate((int)RotateAnglePath);
    52.             }
    53.         }

    Thanks

    Loftty

  2. #2
    Old Member moeur's Avatar
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    Re: Rotate Graphics path

    Check out this thread
    http://www.vbforums.com/showthread.php?t=391330 (rotate and zoom image)

    Its vb.NET but you'll get the idea.

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