a44421a79fb36cc2036fe116b97ea3bc9590cd0c
braney
  Fri Dec 2 09:34:39 2011 -0800
removed rcsid (#295)
diff --git src/lib/mgCircle.c src/lib/mgCircle.c
index 97f7894..4507afe 100644
--- src/lib/mgCircle.c
+++ src/lib/mgCircle.c
@@ -1,80 +1,79 @@
 /* mgCircle.c - Simple stepping draw a circle algorithm.  
 	Don't even correct aspect ratio. */
 
 #include "common.h"
 #include "memgfx.h"
 
-static char const rcsid[] = "$Id: mgCircle.c,v 1.4 2008/09/17 17:56:37 kent Exp $";
 
 void mgCircle(struct memGfx *mg, int xCen, int yCen, int rad, 
 	Color color, boolean filled)
 /* Draw a circle using a stepping algorithm.  Doesn't correct
  * for non-square pixels. */
 {
 int err;
 int derr, yerr, xerr;
 int aderr, ayerr, axerr;
 register int x,y;
 int lasty;
 
 if (rad <= 0)
     {
     mgPutDot(mg, xCen, yCen, color);
     return;
     }
 err = 0;
 x = rad;
 lasty = y = 0;
 for (;;)
     {
     if (filled)
 	{
 	if (y == 0)
 	    mgLineH(mg, yCen, xCen-x, xCen+x, color);
 	else
 	    {
 	    if (lasty != y)
 		{
 		mgLineH(mg, yCen-y, xCen-x, xCen+x, color);
 		mgLineH(mg, yCen+y, xCen-x, xCen+x, color);
 		lasty = y;
 		}
 	    }
 	}
     else
 	{
 	/* draw 4 quadrandts of a circle */
 	mgPutDot(mg, xCen+x, yCen+y, color);
 	mgPutDot(mg, xCen+x, yCen-y, color);
 	mgPutDot(mg, xCen-x, yCen+y, color);
 	mgPutDot(mg, xCen-x, yCen-y, color);
 	}
     axerr = xerr = err -x-x+1;
     ayerr = yerr = err +y+y+1;
     aderr = derr = yerr+xerr-err;
     if (aderr < 0)
 	aderr = -aderr;
     if (ayerr < 0)
 	ayerr = -ayerr;
     if (axerr < 0)
 	axerr = -axerr;
     if (aderr <= ayerr && aderr <= axerr)
 	{
 	err = derr;
 	x -= 1;
 	y += 1;
 	}
     else if (ayerr <= axerr)
 	{
 	err = yerr;
 	y += 1;
 	}
     else
 	{
 	err = xerr;
 	x -= 1;
 	}
     if (x < 0)
 	break;
     }
 }