/*_|_|   MODE12H.CPP   PUBLIC DOMAIN   ( part 3 of 4 )
 _|_|_|   Simple demonstration of pixel manipulation
 _|_|_|   in 640x480x16 video mode 12h.
 _|_|_|   Kurt Kuzba   (5/13/1998)*/
void Mode12h::Line(int x, int y, int x2, int y2, int c)
{
   // draws a line from (x, y) to (x2, y2) in color c
   // adapted from bresnham.c in bob Stout's SNIPPETS
   int i, steep = 0, sx, sy, dx, dy, e, ex, ey;
   dx = ((x2 - x) > 0) ? x2 - x : -(x2 - x);
   sx = ((x2 - x) > 0) ?      1 :        -1;
   dy = ((y2 - y) > 0) ? y2 - y : -(y2 - y);
   sy = ((y2 - y) > 0) ?      1 :        -1;
   if(dy > dx)
   {
      steep =  x;  x =  y;  y = steep;  /* swap  x and  y */
      steep = dx; dx = dy; dy = steep;  /* swap dx and dy */
      steep = sx; sx = sy; sy = steep;  /* swap sx and sy */
      steep = 1;
   }
   ex = dx << 1;   ey = dy << 1;   e = ey - dx;
   for(i = 0; i < dx; i++)
   {
      if(steep)   PutPixel(y, x, c);   else  PutPixel(x, y, c);
      while(e >= 0)   { y += sy;e -= ex; }   x += sx;   e += ey;
   }
   PutPixel(x2, y2, c);
}
 /*_|_|   end   MODE12H.CPP   PUBLIC DOMAIN   ( part 3 of 4 )*/
> ] I'm so relieved...  My IQ test came back negative...........
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