/*  Implementation of the DDA algorithm  */


/* increment the columns, depending on the slope of the clock hand */
   for ( col = colStart; col < colStop; col++ )
   {
      row+=slope;
      clock[(int) round(row)][(int) col]='x';
   }


/* increment the rows, depending on the slope of the clock hand */
   for ( row = rowStart; row < rowStop; row++ )
   {
      col+=slope;
      clock[(int) row][(int) round(col)]='x';
   }