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Ring Of Light

Posted on 2006-11-02
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Last Modified: 2010-04-16
If i wanted to create a circle of light say 700 p hight and 700p wide, the center of the ring would be transparent and so would everything on the outer side of the ring...

How could i do this?
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Question by:schenkp
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5 Comments
 
LVL 86

Expert Comment

by:Mike Tomlinson
ID: 17860462
Like making an irregular shaped form the shape of a Music CD?
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Author Comment

by:schenkp
ID: 17861126
Yes....it to be touching the outer edges of a sqaure form, like a box with the ring around it.
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LVL 15

Accepted Solution

by:
ozymandias earned 2000 total points
ID: 17861335
Very basic example :

using System;
using System.Drawing;


namespace Drawing1
{
      /// <summary>
      /// Summary description for Class1.
      /// </summary>
      class Class1
      {
            
            [STAThread]
            static void Main(string[] args)
            {
                  Bitmap b = new Bitmap(710,710);
                  b.MakeTransparent(Color.WhiteSmoke);
                  Graphics g = Graphics.FromImage(b);
                  g.Clear(Color.WhiteSmoke);
                  g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
                  g.DrawEllipse(new Pen(Brushes.White, 6f), 5 , 5, 700, 700);
                  b.Save(new System.IO.FileStream(@"c:\temp\lightring.gif",System.IO.FileMode.Create), System.Drawing.Imaging.ImageFormat.Gif);      
            }
      }
}
0
 
LVL 15

Expert Comment

by:ozymandias
ID: 17861346
This gives you a 710 x 710 transparent gif in the middle of which is a 700 diameter white circle.
0
 

Author Comment

by:schenkp
ID: 17866906
How do i use this as a class?  Or rather how can i put it into a test project.
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