/// <summary>
/// Features the 'row' rows 'col' cols grid. The left top cell is current cell. Mark based flag.
/// </summary>
/// </summary>
/// <returns></returns>
public int Feature(int row, int col, DeleFeatureFlag flag)
{
int feature = 0;
DataCell cell = this;
//test if has enough rows
for (int i = 0; i < row - 1; i++)
{
if (cell.HasDownCell())
{
cell = cell.DownCell();
}
else
{
return(-1);
}
}
cell = this;
//test if has enough columns
for (int i = 0; i < col - 1; i++)
{
if (cell.HasRightCell())
{
cell = cell.RightCell();
}
else
{
return(-1);
}
}
cell = this;
DataCell cell_j = cell;
//feature
int bit_flag = 1;
for (int i = 0; i < row; i++)
{
for (int j = 0; j < col; j++)
{
if (flag(cell_j))
{
feature += bit_flag;
}
bit_flag <<= 1;
if (j < col - 1)
{
cell_j = cell_j.RightCell();
}
}
if (i < row - 1)
{
cell = cell.DownCell();
cell_j = cell;
}
}
return(feature);
}
/// <summary>
/// Features the 3*3 grid whose left top cell is current cell. Mark based flag.
/// </summary>
/// <returns></returns>
public int Feature33(DeleFeatureFlag flag)
{
int feature = 0;
if (HasRightCell() && RightCell().HasRightCell() && HasDownCell() && DownCell().HasDownCell())
{
if (flag(this))
{
feature += 1;
}
if (flag(RightCell()))
{
feature += 2;
}
if (flag(RightCell().RightCell()))
{
feature += 4;
}
if (flag(DownCell()))
{
feature += 8;
}
if (flag(DownCell().RightCell()))
{
feature += 16;
}
if (flag(DownCell().RightCell().RightCell()))
{
feature += 32;
}
if (flag(DownCell().DownCell()))
{
feature += 64;
}
if (flag(DownCell().DownCell().RightCell()))
{
feature += 128;
}
if (flag(DownCell().DownCell().RightCell().RightCell()))
{
feature += 256;
}
}
else
{
feature = -1;
}
return(feature);
}