title: Draw sin(x)/x to PictureBox in animation mode by Timer component
body: <p>I need to draw sin(x)/x graphic into PictureBox in animation mode by timer component. I have axes already on my picBox and graphic draws from 0;0. Also I have some code from this forum, but there my graphic draws FROM RIGHT TO THE LEFT, and I need to draw it FROM LEFT TO THE RIGHT. And I need to draw it in animation mode by timer. Could anybody help me?
  Here's my drawing function:</p>
  
  <pre><code>private void drawStream()
      {
          const int scaleX = 35;
          const int scaleY = 35;
  
          Point picBoxTopLeft = new Point(0, 0);
          Point picBoxTopLeftm1 = new Point(-1, 0);          
  
          int halfX = picBox.Width / 2; 
          int halfY = picBox.Height / 2; 
          Size size = new Size(halfX + 20, picBox.Height);
  
          Graphics gr = picBox.CreateGraphics();
          gr.TranslateTransform(halfX, halfY);
  
          gr.ScaleTransform(scaleX, scaleY);
  
          gr.ResetClip();
  
          float lastY = (float)Math.Sin(0);
          float y = lastY;
          Pen p = new Pen(Color.Red, 0.015F);
          float stepX = 1F / scaleX; 
  
          for (float x = 0; x &lt; 15; x += stepX)
          {
              gr.CopyFromScreen(picBox.PointToScreen(picBoxTopLeft), picBoxTopLeftm1, size, CopyPixelOperation.SourceCopy);             
              y = (float)Math.Sin(x);
              gr.DrawLine(p, -stepX, lastY, 0, y);
              lastY = y;                
          } 
      }
  </code></pre>
  
  <p>Thanx a lot.
  P.S. Sorry for my English, I'm Ukrainian.</p>